feat: add specify bundle command (#3070)

* docs: dogfood Spec Kit — bundler SDD artifacts + constitution

Scaffold Spec Kit (--integration copilot) and run the full SDD workflow
against the `specify bundle` subcommand feature:

- spec.md (4 user stories, 31 FRs, 8 success criteria) + clarifications
- plan.md, research.md, data-model.md, contracts/, quickstart.md
- tasks.md (43 dependency-ordered tasks, organized by user story)
- Spec Kit Constitution v1.0.0 (code quality, testing, UX, performance,
  dependency/security principles) derived from deep codebase analysis
- plan Constitution Check + tasks grounded against the ratified principles

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat(bundler): add `specify bundle` subcommand for role-based setups

Implements the Spec Kit Bundler as a `specify bundle ...` subcommand group
that calls existing primitive machinery in-process with zero new dependencies,
per the v1.0.0 constitution (Principles I-V).

Adds the `specify_cli.bundler` package (models, services, lib helpers) and the
`commands/bundle` Typer group wiring search, info, list, install, update,
remove, validate, build, init, and catalog list/add/remove (with --json and
--offline). Includes manifest/catalog schemas, version + integration-clash
gating, discovery-only refusal, idempotent install with atomic rollback,
non-collateral removal, and offline-first catalog resolution.

Ships an 82-test suite (contract/unit/integration), four sample role bundles
(product-manager, business-analyst, security-researcher, developer), README
"Bundles" docs, and an AGENTS.md pitfall on the test-venv gotcha. Marks
tasks T001-T043 complete and records follow-ups T044 (live in-process
primitive dispatch) and T045 (install from a local artifact path).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* docs(contributing): document running the full test suite via project .venv

Add a "Running the full test suite" subsection under Automated checks covering
`uv pip install -e ".[test]"` + `.venv/bin/python -m pytest`, with the
shared/global editable-install contamination caveat that mirrors the AGENTS.md
pitfall.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat(bundler): wire real in-process primitive install + local-artifact install

Closes the two follow-ups left after the initial bundler landing.

T044 — DefaultPrimitiveInstaller now performs real installs through existing
machinery instead of raising "use the primitive command" errors:
- presets/extensions install via their reusable managers
  (install_from_directory / install_from_zip); bundled assets install fully
  offline, catalog assets are fetched only when the network is allowed.
- workflows/steps delegate to the existing `workflow add` / `workflow step add`
  command callables in-process (project root as cwd), avoiding any duplicated
  download/validation logic (Principle I).
- `--offline` is threaded through DefaultPrimitiveInstaller(allow_network=…) so
  network-only kinds refuse with an actionable message rather than silently
  reaching out.

T045 — `specify bundle install` now accepts a local path (a built .zip
artifact, a bundle directory, or a bundle.yml) and installs directly without
consulting the catalog stack; bundle-ids still resolve via the stack.

Adds 13 tests (routing, offline gating, local-source resolution, and an
end-to-end offline build → install → list → remove of the bundled
agent-context extension). Bundler suite: 95 passing; ruff clean. Marks T044
and T045 complete in tasks.md.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* docs(bundler): append Phase 8 convergence tasks from converge assessment

Ran the converge command: assessed the codebase against spec.md, plan.md,
tasks.md, and the v1.0.0 constitution. Appended 7 traceable gap-closure tasks
(T046–T052) as a new "Phase 8: Convergence" section. Append-only — no existing
tasks were modified and no application code was changed.

Findings: 1 CRITICAL (Constitution III — bundle group undocumented under
docs/reference/), 3 HIGH (FR-005/SC-007 validate references; FR-009/SC-002 info
expansion; FR-012 install-time init), 3 MEDIUM (FR-013 integration precedence;
FR-020 surface overlaps; FR-028 update refresh).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Implement Phase 8 convergence tasks (T046–T052)

Close the gaps the converge command found between the bundler spec/plan/
constitution and the code:

- T046: add docs/reference/bundles.md documenting the full `specify bundle`
  command group; link it from docs/reference/overview.md (Constitution III).
- T047: wire a reference checker into `bundle validate` (services/references.py);
  online runs fail and name unresolved component references, offline runs warn.
- T048: expand `bundle info` to enumerate the full component set (versions,
  preset priority/strategy) plus the bundle integration — info == install.
- T049/T050: `bundle install`/`bundle init` now scaffold an uninitialized
  project via the existing `specify init` machinery, choosing the integration by
  precedence (override → bundle-declared → Copilot + OS default script type).
- T051: surface foreseeable component overlaps during info and install.
- T052: `bundle update` refreshes already-installed components via a new
  refresh path in install_bundle, preserving primitive-level overrides.

Adds unit/contract/integration coverage (107 tests pass).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* converge: append Phase 9 (T053) — surface bundle trust indicator

Re-run of converge after Phase 8. The seven Phase 8 tasks are verified closed.
One residual partial gap remains: the `verified`/trust indicator (FR-010,
FR-027) is exposed only in `bundle info --json`, absent from `bundle search`
(the primary discovery surface) and `bundle info` text. Appended as a single
new task for implement to complete. Append-only; no code changed.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Implement T053 — surface bundle trust indicator in discovery

`bundle search` (text + JSON) and `bundle info` (text + JSON) now expose each
catalog entry's verification/trust level (verified vs community), so users can
judge a bundle's trust before installing, per FR-010 / FR-027. Previously
`verified` was only present in `bundle info --json`.

Adds contract coverage; 108 tests pass.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* docs: dogfood Spec Kit — bundler SDD artifacts + constitution

Scaffold Spec Kit (--integration copilot) and run the full SDD workflow
against the `specify bundle` subcommand feature:

- spec.md (4 user stories, 31 FRs, 8 success criteria) + clarifications
- plan.md, research.md, data-model.md, contracts/, quickstart.md
- tasks.md (43 dependency-ordered tasks, organized by user story)
- Spec Kit Constitution v1.0.0 (code quality, testing, UX, performance,
  dependency/security principles) derived from deep codebase analysis
- plan Constitution Check + tasks grounded against the ratified principles

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat(bundler): add `specify bundle` subcommand for role-based setups

Implements the Spec Kit Bundler as a `specify bundle ...` subcommand group
that calls existing primitive machinery in-process with zero new dependencies,
per the v1.0.0 constitution (Principles I-V).

Adds the `specify_cli.bundler` package (models, services, lib helpers) and the
`commands/bundle` Typer group wiring search, info, list, install, update,
remove, validate, build, init, and catalog list/add/remove (with --json and
--offline). Includes manifest/catalog schemas, version + integration-clash
gating, discovery-only refusal, idempotent install with atomic rollback,
non-collateral removal, and offline-first catalog resolution.

Ships an 82-test suite (contract/unit/integration), four sample role bundles
(product-manager, business-analyst, security-researcher, developer), README
"Bundles" docs, and an AGENTS.md pitfall on the test-venv gotcha. Marks
tasks T001-T043 complete and records follow-ups T044 (live in-process
primitive dispatch) and T045 (install from a local artifact path).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* docs(contributing): document running the full test suite via project .venv

Add a "Running the full test suite" subsection under Automated checks covering
`uv pip install -e ".[test]"` + `.venv/bin/python -m pytest`, with the
shared/global editable-install contamination caveat that mirrors the AGENTS.md
pitfall.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat(bundler): wire real in-process primitive install + local-artifact install

Closes the two follow-ups left after the initial bundler landing.

T044 — DefaultPrimitiveInstaller now performs real installs through existing
machinery instead of raising "use the primitive command" errors:
- presets/extensions install via their reusable managers
  (install_from_directory / install_from_zip); bundled assets install fully
  offline, catalog assets are fetched only when the network is allowed.
- workflows/steps delegate to the existing `workflow add` / `workflow step add`
  command callables in-process (project root as cwd), avoiding any duplicated
  download/validation logic (Principle I).
- `--offline` is threaded through DefaultPrimitiveInstaller(allow_network=…) so
  network-only kinds refuse with an actionable message rather than silently
  reaching out.

T045 — `specify bundle install` now accepts a local path (a built .zip
artifact, a bundle directory, or a bundle.yml) and installs directly without
consulting the catalog stack; bundle-ids still resolve via the stack.

Adds 13 tests (routing, offline gating, local-source resolution, and an
end-to-end offline build → install → list → remove of the bundled
agent-context extension). Bundler suite: 95 passing; ruff clean. Marks T044
and T045 complete in tasks.md.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* docs(bundler): append Phase 8 convergence tasks from converge assessment

Ran the converge command: assessed the codebase against spec.md, plan.md,
tasks.md, and the v1.0.0 constitution. Appended 7 traceable gap-closure tasks
(T046–T052) as a new "Phase 8: Convergence" section. Append-only — no existing
tasks were modified and no application code was changed.

Findings: 1 CRITICAL (Constitution III — bundle group undocumented under
docs/reference/), 3 HIGH (FR-005/SC-007 validate references; FR-009/SC-002 info
expansion; FR-012 install-time init), 3 MEDIUM (FR-013 integration precedence;
FR-020 surface overlaps; FR-028 update refresh).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Implement Phase 8 convergence tasks (T046–T052)

Close the gaps the converge command found between the bundler spec/plan/
constitution and the code:

- T046: add docs/reference/bundles.md documenting the full `specify bundle`
  command group; link it from docs/reference/overview.md (Constitution III).
- T047: wire a reference checker into `bundle validate` (services/references.py);
  online runs fail and name unresolved component references, offline runs warn.
- T048: expand `bundle info` to enumerate the full component set (versions,
  preset priority/strategy) plus the bundle integration — info == install.
- T049/T050: `bundle install`/`bundle init` now scaffold an uninitialized
  project via the existing `specify init` machinery, choosing the integration by
  precedence (override → bundle-declared → Copilot + OS default script type).
- T051: surface foreseeable component overlaps during info and install.
- T052: `bundle update` refreshes already-installed components via a new
  refresh path in install_bundle, preserving primitive-level overrides.

Adds unit/contract/integration coverage (107 tests pass).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* converge: append Phase 9 (T053) — surface bundle trust indicator

Re-run of converge after Phase 8. The seven Phase 8 tasks are verified closed.
One residual partial gap remains: the `verified`/trust indicator (FR-010,
FR-027) is exposed only in `bundle info --json`, absent from `bundle search`
(the primary discovery surface) and `bundle info` text. Appended as a single
new task for implement to complete. Append-only; no code changed.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Implement T053 — surface bundle trust indicator in discovery

`bundle search` (text + JSON) and `bundle info` (text + JSON) now expose each
catalog entry's verification/trust level (verified vs community), so users can
judge a bundle's trust before installing, per FR-010 / FR-027. Previously
`verified` was only present in `bundle info --json`.

Adds contract coverage; 108 tests pass.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): address PR review — annotations, Windows paths, HTTPS, errors, reproducible builds

Resolves automated review feedback on github/spec-kit#3070:

- validator: drop redundant string-quoting on ReferenceChecker's
  `str | None` return so the annotation evaluates as a real union under
  `from __future__ import annotations`.
- adapters: normalize Windows drive-letter paths (e.g. C:\...) to the
  local-file branch so offline file catalogs resolve on Windows.
- adapters: enforce HTTPS (HTTP only for localhost) and require a host on
  remote catalog URLs before any network call, mirroring
  specify_cli.catalogs URL validation (MITM/downgrade protection).
- adapters: pass `origin` to loads_json for local files and HTTP payloads
  so JSON parse errors name the real source instead of <string>.
- manifest: parse component `priority` defensively, raising an actionable
  BundlerError on non-integer values instead of a raw ValueError.
- packager: write zip members with a fixed timestamp + permissions so
  identical inputs yield byte-for-byte identical artifacts (genuinely
  reproducible builds), and strengthen the determinism test accordingly.

Adds regression tests for priority validation, plain-HTTP/host rejection,
and byte-level artifact reproducibility (111 bundler tests pass; ruff clean).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): address PR review round 2 — nested output dir + file:// URLs

- packager: when --output points inside the bundle directory, exclude the
  whole output subtree from collection so previously-built artifacts are
  never re-packaged (prevents broken reproducibility and unbounded growth).
- adapters: resolve file:// catalog URLs via url2pathname and preserve
  netloc, so Windows file URLs (file:///C:/...) and UNC shares
  (file://server/share) resolve correctly instead of dropping the host or
  producing /C:/x.

Adds regression tests for nested-output exclusion and file:// resolution
(113 bundler tests pass; ruff clean).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): address PR review round 3 — discovery UX + hardening

- bundle search/info: fall back to the built-in/user catalog stack instead of
  requiring a Spec Kit project, so discovery works in a fresh directory (and
  the README/quickstart examples now match actual behavior). install still
  auto-initializes a project as before.
- packager: traverse with os.walk(followlinks=False) and prune symlinked
  directories before descending, so a symlink-to-dir can no longer pull in
  out-of-tree files (which previously turned "skip symlinks" into a hard
  ensure_within() failure and did extra filesystem work).
- records: parse contributed-component priority defensively, raising an
  actionable BundlerError on a corrupt records file instead of leaking a raw
  ValueError/traceback.
- installer: give install_bundle's manifest parameter an explicit
  BundleManifest | None type for a clearer, safer service API.

Adds regression tests for project-less search/info, symlinked-dir pruning,
and corrupt-priority records (117 bundler tests pass; ruff clean).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): address PR review round 4 + markdownlint exclusions

Review fixes:
- bundle info: expand the manifest regardless of install policy so
  discovery-only bundles remain inspectable (only install is refused).
- _download_manifest: handle local .zip download_url by extracting bundle.yml
  (via _local_manifest_source), and add a real remote HTTPS fetch path using
  the shared authenticated, redirect-validated open_url client (HTTPS enforced
  on the initial URL and every redirect; offline still refuses).
- _run_init: thread the --offline flag through to the init callback so
  `bundle install/init --offline` never performs network init.
- conflict.ConflictReport: use field(default_factory=list) and drop the
  None + __post_init__ workaround.
- CatalogSource.from_dict: parse priority defensively, raising an actionable
  BundlerError naming the source + offending value instead of a raw ValueError.

markdownlint:
- Exclude .specify/, .github/, and specs/ (and their subdirectories) from
  markdownlint so the in-flight dogfooding scaffolding doesn't trip the linter.

Adds regression tests for discovery-only info, local-zip download_url, and
non-integer catalog priority (120 bundler tests pass; ruff clean; the PR's own
markdown lints clean).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): address PR review round 5 + ignore generated files in whitespace check

Review fixes:
- packager: exclude any prior build artifact for this bundle (matching
  <id>-*.zip), not just the current output path, so older artifacts next to
  bundle.yml are never re-packaged.
- docs(bundles): correct the note — `search` and `info` work without a project
  (they fall back to the built-in/user catalog stack); only list/update/remove/
  catalog require an initialized project.

CI / generated files:
- .gitattributes: mark the generated dogfooding scaffolding (.specify/**, the
  speckit .github agent/prompt files, copilot-instructions.md, specs/**) with
  -whitespace so `git diff --check` (the Lint workflow's whitespace gate) stops
  flagging emitted trailing whitespace. These files are produced by
  `specify init` and are scrubbed before merge.

Adds a regression test for prior-artifact exclusion (121 bundler tests pass;
ruff clean).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): collision-resistant catalog ids, canonical local paths, explicit uninstalled result

Addresses review round 6 (PR #3070):
- catalog_config._derive_id now combines host label with the URL path stem so
  multiple catalogs from the same host get distinct, stable default ids.
- add_source canonicalizes local file paths to absolute before persisting, so
  project config no longer depends on the caller's cwd.
- InstallResult gains a dedicated `uninstalled` list; remove_bundle no longer
  overloads `installed` for removals, and the CLI prints from `uninstalled`.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): confine config writes, guard indeterminate integration, fix validate docs

Addresses review round 7 (PR #3070):
- save_records and catalog_config._write now pass within=project_root to
  dump_json/dump_yaml, refusing symlinked .specify paths that escape the
  project (defense-in-depth, matching the rest of the codebase).
- resolve_install_plan now fails when a bundle pins an integration but the
  project's active integration cannot be determined and no explicit
  --integration override was given, instead of silently adopting the bundle's
  required integration (FR-019 guard). CLI passes integration_explicit.
- docs/reference/bundles.md: corrected the validate semantics to describe the
  actual best-effort online behavior (unreachable catalogs warn, not fail).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): Windows path handling + review round 8 hardening

Fix Windows CI failures:
- is_safe_relpath now rejects POSIX-absolute (/abs) and Windows drive-absolute
  (C:\x, UNC) paths on every OS, instead of passing them through on Windows
  where os.path.isabs('/abs') is False and Path('/abs').parts yields '\\'.
- _download_manifest treats a Windows drive-letter download_url (C:\bundle.yml,
  which urlparse reads as scheme 'c') as a local file, fixing the empty
  component set in `bundle info` on Windows.

Address review round 8 (PR #3070):
- Bundled workflows now install under --offline (locate via
  _locate_bundled_workflow) instead of being refused unconditionally.
- bundle update preserves the original installed_at timestamp on refresh
  (import find_record; reuse the existing record's timestamp).
- _derive_id lowercases the host label so 'Example.com' and 'example.com'
  produce the same deterministic id.
- CatalogEntry.from_dict validates 'tags' is a list and 'verified' is a real
  boolean, raising BundlerError on invalid untrusted shapes.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): normalize SemVer prerelease spellings before version parsing

Addresses review round 9 (PR #3070): parse_version and is_semver now apply the
same prerelease normalization (mirroring specify_cli._version._normalize_tag)
so SemVer spellings like 1.2.3-rc1 / 1.2.3-alpha1 validate and compare
consistently across is_semver, parse_version, and satisfies. Leading 'v' is
also stripped. Keeps the manifest validator and constraint checks in agreement.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): no collateral removal + enforce manifest-pinned versions

Addresses review round 10 (PR #3070):
- install_bundle records only the components this bundle actually contributed:
  freshly-installed components, plus pre-existing ones already owned by this
  bundle (refresh) or a sibling bundle (shared/refcounted). A component that is
  installed on disk but tracked by no bundle was installed independently and is
  no longer attributed, so `bundle remove` won't uninstall it (FR-022).
- preset/extension/workflow install paths now verify the active catalog's
  advertised version matches the manifest-pinned component.version before
  downloading/installing, raising BundlerError on mismatch so bundles stay
  reproducible. When a catalog advertises no version the pin can't be enforced
  and installation proceeds.

Added regression tests: independent pre-existing component survives removal;
version-mismatch refusal (helper + workflow path).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* feat(scripts): add SPECIFY_INIT_DIR to target a member project from the repo root (#2892)

* feat(scripts): add SPECIFY_INIT_DIR to target a member project from the repo root

Resolve an explicit SPECIFY_INIT_DIR project override once in the core
get_repo_root / Get-RepoRoot, so a non-interactive / CI caller can target a
member project (the directory containing .specify/) from a monorepo root
without cd. Strict by design: the path must exist and contain .specify/,
otherwise it hard-errors with no silent fallback.

- Single resolver in core; the git feature-branch script inherits it by
  sourcing core, with no per-extension copies.
- PS resolver verifies the resolved path is a directory (Resolve-Path also
  succeeds for files) so a file value errors as "not an existing directory".
- get_feature_paths splits decl/assignment so a SPECIFY_INIT_DIR failure
  propagates instead of being masked by `local`.
- create-new-feature-branch: when core is absent (only git-common loaded) and
  SPECIFY_INIT_DIR is set, hard-error rather than silently using the git root.
- Document SPECIFY_INIT_DIR and SPECIFY_FEATURE_DIRECTORY in the core reference.
- Tests for valid/relative/trailing-slash/file/missing/no-.specify targets,
  feature-axis composition, the no-core guard, and a PowerShell mirror.

* fix: guard SPECIFY_INIT_DIR with stale core scripts

* docs: clarify SPECIFY_FEATURE_DIRECTORY precedence wording

* fix: normalize trailing slash in PowerShell SPECIFY_INIT_DIR resolver

Resolve-Path preserves a trailing separator from its input, so a
SPECIFY_INIT_DIR ending in a slash returned a root that didn't match the
bash resolver (whose `cd && pwd` strips it). That broke
test_ps_trailing_slash_tolerated on the CI runners, which do have pwsh.
Trim it with TrimEndingDirectorySeparator (no-op on a bare root or a path
with no trailing separator).

Also fix the misleading test comment: the PowerShell mirror runs on the
CI ubuntu/windows runners (they ship pwsh), it is not skipped there.

* test: normalize bash path expectations on Windows

* docs: clarify SPECIFY_INIT_DIR root helpers

* chore: sync dogfooded .specify core scripts with SPECIFY_INIT_DIR

Mirror the SPECIFY_INIT_DIR resolver (resolve_specify_init_dir in
common.sh) into the committed dogfooding .specify/scripts/bash copies so
the git extension's create-new-feature-branch.sh finds an up-to-date
common.sh instead of failing with "requires updated Spec Kit core
scripts". Fixes the test_init_dir.py CI failures.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): harden remote catalog fetch and config parsing

- adapters: route catalog HTTP fetches through the shared authenticated
  client (authentication.http.open_url) so auth.json tokens apply and the
  Authorization header is stripped on cross-host/downgrade redirects.
  Reject any redirect that leaves HTTPS via a redirect_validator and
  re-validate the final URL after redirects, closing the urlopen
  auto-redirect MITM/downgrade gap.
- catalog_config._read: raise an actionable BundlerError when the config
  top level is not a mapping, 'catalogs' is not a list, or an entry is
  not a mapping, instead of letting list(<str>) produce a downstream
  AttributeError.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): tighten record read confinement, policy gate, and precedence

Addresses review 4534504799:

- records.load_records: confine the read via ensure_within(project_root,
  ...) so a symlinked/traversal-escaping .specify cannot read arbitrary
  files outside the project (matches the write path's within= guard).
- catalog_config._slug: lowercase so derived catalog ids are
  deterministic across platforms and case-variant duplicates can't slip
  past the case-sensitive dup check.
- installer.install_bundle: reword the docstring's misleading "atomic on
  failure" claim to describe the real scoped guarantee (record written
  only on full success; rollback limited to newly-installed components).
- bundle update: enforce the source install_policy like install, refusing
  to update from a discovery-only source (FR-025).
- catalog source precedence: the CLI now passes ~/.specify as the user
  config dir so project > user > built-in precedence is actually
  reachable (previously the user scope was silently ignored).
- .gitattributes: scope the specs whitespace exemption to the generated
  dogfooding feature dir (specs/001-spec-kit-bundler/**) instead of all
  of specs/**.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): no collateral refresh, catalog id integrity, loud info

Addresses review 4534571362:

- installer: in refresh mode (bundle update) only re-apply already-
  installed components that this bundle (or a sibling) owns. Components
  installed independently and tracked by no bundle are now skipped, never
  refreshed, so update cannot make collateral changes (FR-022).
- catalog.load_catalog_payload: validate each entry's own id is present
  and matches its enclosing bundles key, rejecting catalogs that would
  otherwise list a spoofed or unresolvable id.
- bundle info: stop swallowing manifest download failures. If the
  manifest can't be resolved (e.g. --offline against an https download_url
  or a download failure), surface the error and exit non-zero instead of
  silently degrading to catalog `provides` counts, preserving the "info
  == what install applies" guarantee.

Added regressions: refresh leaves independently-installed components
untouched, catalog id key/field mismatch + missing id rejection, and
info exits non-zero when the manifest is unresolvable offline.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): confine catalog-config and integration-marker reads

Addresses review 4534716790: two more state reads bypassed the
symlink/path-escape confinement that records and the write paths already
enforce.

- catalog_config._read: validate the config path with
  ensure_within(project_root, ...) before exists()/read, so a symlinked
  .specify resolving outside project_root is rejected instead of read.
- lib.project.active_integration: confine the .specify/integration.json
  read the same way; an out-of-tree escape is treated as "not
  determinable" (returns None) rather than followed.

Added regressions covering both via a symlinked .specify pointing
outside the project root.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): validate manifest tags, disambiguate derived ids by full host

Addresses review 4534768419:

- manifest.from_dict: reject a non-list `tags` (e.g. a bare string) instead
  of splitting it character-by-character, matching the catalog parser and
  the schema contract (tags = list of strings).
- catalog_config._derive_id: derive ids from the full host (TLD included)
  so example.com and example.net no longer collide on the same id. Updated
  the affected id assertions.
- CHANGELOG: call out the new `specify bundle` command group in the
  unreleased section (the PR's headline user-facing feature).
- .gitattributes: clarify the specs whitespace exemption — the dogfooding
  feature dir is scrubbed before merge (not retained), so it doesn't weaken
  checks for kept docs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* chore(gitattributes): retain whitespace exemption for constitution.md

The project constitution (.specify/memory/constitution.md) is the one
dogfooding artifact carried forward past the pre-merge scrub. Give it its
own standalone whitespace exemption so it survives removal of the broader
.specify/** generated-scaffolding exemption.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): accurate uninstall count, confine catalog read, safe bundle id

Addresses review 4534812056:

- installer.remove_bundle: only count a component as uninstalled when
  installer.remove() actually ran; components already absent on disk are
  reported as skipped, keeping the uninstalled count accurate.
- catalog.load_source_stack: confine the project-scoped .specify config read
  with ensure_within, so a symlinked .specify/ resolving outside the project
  root is refused (consistent with the bundler's other guarded reads).
- manifest: enforce a filesystem-safe slug for bundle.id in structural
  validation; packager.build_bundle adds an ensure_within defense-in-depth
  check so a crafted id can never push the artifact outside the output dir.

Also reverts the CHANGELOG entry (the changelog is updated separately).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): validate requires/provides shapes in manifest and catalog

Addresses review 4534855443:

- manifest: validate requires.tools and requires.mcp as list-of-strings via
  a shared _parse_str_list helper (also reused for tags), so a bare string
  like `tools: docker` is rejected with an actionable BundlerError instead of
  being split character-by-character.
- catalog.CatalogEntry.from_dict: validate that `requires` and `provides` are
  mappings before accessing them, so an untrusted catalog payload with
  `requires: "..."` raises a named BundlerError rather than escaping as a raw
  AttributeError traceback.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): require README.md when building a bundle artifact

Addresses review 4534938014: build_bundle now fails early with an
actionable error when README.md is missing, matching the documented
artifact contract (manifest + README) instead of silently producing a
bundle with no human-facing description.

Also reverts CHANGELOG.md to the upstream/main copy.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): validate record shapes; drop stale install --refresh claim

Addresses review 4534969692:

- records.InstalledBundleRecord.from_dict: hard-error when
  contributed_components is not a list, instead of iterating a corrupt
  bare string character-by-character.
- records.load_records: validate the top-level 'bundles' field is a list and
  fail with a clear BundlerError when a corrupt file makes it a mapping/string.
- PR description: remove the inaccurate "supports --refresh" note from
  `bundle install` (refresh is the `bundle update` path); docs already omit it.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): refuse symlinked .specify, reject bad url schemes, IPv6 ids

Addresses review 4534997724:

- lib.project.find_project_root: a symlinked .specify is no longer accepted
  as a project root (is_dir() follows symlinks), matching the confinement the
  rest of the CLI applies and avoiding confusing downstream failures.
- catalog_config.add_source: reject unsupported url schemes (ssh://, ftp://,
  ...) up front instead of silently treating them as local paths; local paths
  containing ':' but not '://' are still allowed.
- catalog_config._derive_id: derive the host via urlparse().hostname so IPv6
  literals, credentials, and ports no longer corrupt the derived id.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): strict semver, narrow artifact skip, preserve priority 0

Addresses review 4535084048:

- versioning.is_semver: enforce a full MAJOR.MINOR.PATCH SemVer (with optional
  pre-release/build) via a dedicated regex, instead of accepting any
  packaging.version.Version-parseable string (e.g. "1", "1.0"). This makes
  BundleManifest.structural_errors() reject non-semver versions.
- packager: narrow the prior-artifact skip pattern to semver-named zips
  (<id>-<x.y.z>.zip) so legitimate assets like <id>-assets.zip are still
  packaged.
- primitives (preset + extension install): use an explicit `is None` check so
  an intentional priority of 0 is preserved instead of being replaced by the
  default.

Adds regressions: non-semver rejection ("1"/"1.0"/"1.2.3.4"), asset-not-
excluded vs semver-artifact-excluded, and priority-0 pass-through.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): artifact regex for prerelease+build; clarify integration/priority docs

Addresses review 4535132279:

- packager: the prior-artifact skip regex now matches semver names carrying
  both a prerelease and build-metadata segment (e.g. 1.0.0-rc1+build5), so such
  an existing artifact is excluded rather than re-packaged — keeping builds
  bounded/deterministic, consistent with is_semver().
- docs/reference/bundles.md: correct the install integration wording.
  --integration selects the integration when initializing a new project and
  confirms the target when a pinned bundle's active integration can't be
  determined; it does NOT override a bundle that targets a specific integration
  (a mismatch aborts with no changes).
- examples/security-researcher README: reword the preset priority note in terms
  of the numeric comparison (ascending priority order) to avoid inverting the
  meaning.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): --integration can't bypass clash guard; honest rollback docs

Addresses review 4535159341:

- bundle install: for an already-initialized project, the project's recorded
  active integration is now authoritative. --integration no longer overrides it
  (which let a copilot project install a claude-pinned bundle via
  `--integration claude`, bypassing the FR-019 clash guard). The override still
  selects the integration at init time and confirms the target only when the
  active integration cannot be determined.
- docs/reference/bundles.md: reword the install guarantee to match the
  implementation — no provenance record is written unless the install fully
  succeeds, and rollback of this run's components is best-effort (removal errors
  are swallowed, so partial on-disk state may remain). Dropped the inaccurate
  "atomic / rolls back everything" claim.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): validate component kind/id when loading records

Addresses review 4535194606: _component_from_dict now rejects a contributed
component whose 'kind' is not a supported component kind or whose 'id' is
empty, raising a BundlerError that explicitly flags the records file as
corrupt. Previously such a record loaded successfully and only failed later
(e.g. in primitive_manager() during bundle remove/update) with a less
actionable error.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): address review 4535234003 (7 findings)

- versioning: tolerate an uppercase `V` prefix in `_normalize_semver` and
  `is_semver`, mirroring specify_cli._version tag normalization (V -> v) so
  `V1.2.3` parses and validates consistently.
- validator: import BundlerError and narrow the speckit_version constraint
  except clause to `BundlerError` only, so programming errors are no longer
  masked behind an "invalid constraint" message.
- bundle update: accept `--integration` and thread it through
  resolve_install_plan the same way `bundle install` does (override used only
  when the active integration can't be auto-detected), so integration-pinned
  bundles can be updated where `.specify/integration.json` is missing/unreadable.
- bundle validate: fold reference warnings into `report.warnings` so the
  ValidationReport is the single warning channel at the CLI layer.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* test(bundler): make update --integration help assertion ANSI-safe

Rich can split the "--integration" option label with ANSI escape codes
between the two leading dashes, so the literal substring check failed under
CI's terminal settings. Match the un-split option word instead, mirroring how
test_bundle_help_lists_all_commands checks bare command names.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): preserve exec bits in artifacts; document install-time pins

Addresses review 4535280786:

- packager.build_bundle: no longer forces every ZIP member to 0644, which
  stripped the executable bit from bundled scripts (e.g. extension hook
  scripts) and could break them after extraction. Permissions are now
  normalized reproducibly to 0755 when the source file has any execute bit
  set, otherwise 0644 — identical inputs still yield byte-for-byte identical
  artifacts.
- installer.install_bundle + docs/reference/bundles.md: document that version
  pins are enforced install-time only. Because primitive is_installed checks
  are id-based (not version-aware), an already-present component is skipped
  during install without comparing its on-disk version to the manifest pin;
  pins are guaranteed applied only on a real install or `bundle update` refresh.

Added a regression asserting executable sources map to 0755 and plain files to
0644 in the built artifact.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* test(bundler): skip exec-bit packager test on Windows

Windows filesystems do not carry Unix execute bits, so chmod(0o755) is a no-op
and the source file reports no execute bit — the packager then correctly stores
the member as 0644. The assertion that an executable source maps to 0755 is only
meaningful on POSIX, so skip it on nt rather than asserting platform-specific
behavior.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): normalize prerelease spellings inside version constraints

Addresses review 4535327154: parse_version() normalized SemVer prerelease
spellings (e.g. 1.2.3-rc1 -> 1.2.3rc1) but parse_constraint() passed the
constraint to packaging.SpecifierSet unmodified, so ">=1.2.3-rc1" raised
InvalidSpecifier even though the same spelling is accepted for installed
versions. parse_constraint() now normalizes the version portion of each
comma-separated clause via the shared _normalize_semver helper, so prerelease
handling is consistent across versions and constraints.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(bundler): validate schema versions and required record identity fields

Addresses review 4535351596:

- records.load_records: validate the on-disk 'schema_version' (required;
  forward-compatible across same-major minor bumps) and fail fast with an
  actionable error on a missing/unknown version, rather than silently parsing a
  possibly-incompatible format and risking incorrect bundle attribution/removal.
- records.InstalledBundleRecord.from_dict: treat missing 'bundle_id' or
  'version' as corruption and raise BundlerError, instead of coercing them to
  empty strings that let later list/remove/update operations behave
  unpredictably.
- catalog_config._read: validate 'schema_version' when present (same-major
  compatibility) and fail fast on an unsupported version so an incompatible
  future config shape can't be mis-parsed into a wrong effective catalog stack.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* chore(bundler): scrub generated dogfooding scaffold before merge

The bundler feature was developed by dogfooding Spec Kit on itself. Now that
the work is complete, remove all generated scaffolding so it does not land in
the repository on merge:

- specs/001-spec-kit-bundler/** (spec, plan, research, data-model, contracts,
  quickstart, tasks, checklists)
- .specify/** (extensions, integrations, scripts, templates, workflows,
  feature/init/integration metadata)
- .github/agents/speckit.*.agent.md, .github/prompts/speckit.*.prompt.md, and
  .github/copilot-instructions.md (Copilot integration scaffold)

Retained: .specify/memory/constitution.md — the single dogfooding artifact
carried forward — with its whitespace exemption in .gitattributes.

.gitattributes and .markdownlint-cli2.jsonc are reverted to the upstream
baseline (plus the constitution whitespace exemption), dropping the now-moot
exemptions for the removed scaffold.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Pascal THUET <pascal.thuet@arte.tv>

.gitattributes

@@ -1,3 +1,7 @@
 * text=auto eol=lf
 
-.github/workflows/*.lock.yml linguist-generated=true merge=ours -whitespace
+.github/workflows/*.lock.yml linguist-generated=true merge=ours -whitespace
+# The project constitution is the one dogfooding artifact carried forward.
+# Keep it exempt from git's whitespace checks (git diff --check / CI) since its
+# generated formatting is not hand-edited.
+.specify/memory/constitution.md -whitespace

.specify/memory/constitution.md

@@ -0,0 +1,214 @@
+<!--
+SYNC IMPACT REPORT
+==================
+Version change: (template/unratified) → 1.0.0
+Bump rationale: Initial ratification of a concrete constitution for the brownfield
+  Spec Kit / specify-cli codebase, derived from an exhaustive multi-pass analysis of
+  the source tree, test suite, CI pipelines, and project conventions (AGENTS.md,
+  CONTRIBUTING.md, DEVELOPMENT.md). MAJOR baseline because it establishes binding
+  governance where none previously existed.
+
+Principles defined:
+  I.   Code Quality & Architectural Discipline
+  II.  Test-Backed Change (NON-NEGOTIABLE)
+  III. CLI & User-Experience Consistency
+  IV.  Offline-First Performance & Resource Discipline
+  V.   Minimal Dependencies & Safe, Idempotent File Operations
+
+Added sections:
+  - Security & Cross-Platform Constraints
+  - Development Workflow & Quality Gates
+  - Governance
+
+Templates reviewed for alignment:
+  ✅ .specify/templates/plan-template.md — generic "Constitution Check" gate (line 39)
+       remains valid; gates are now concretely populated by Principles I–V at plan time.
+  ✅ .specify/templates/spec-template.md — no constitution-specific tokens; no change needed.
+  ✅ .specify/templates/tasks-template.md — task categories (setup/foundational/story/polish)
+       already accommodate testing + performance + UX tasks mandated here; no change needed.
+  ✅ .github/agents/speckit.*.agent.md — command guidance is agent-agnostic; no change needed.
+
+Follow-up TODOs: none. RATIFICATION_DATE set to first adoption date below.
+-->
+
+# Spec Kit Constitution
+
+Spec Kit (the `specify-cli` package and its bundled assets) is a local, offline-capable
+developer CLI that bootstraps and operates Spec-Driven Development workflows for AI coding
+agents. These principles are derived from the patterns the codebase already enforces. They
+are binding on all changes — including the `specify bundle` subcommand and any future
+command group, integration, extension, preset, or workflow.
+
+## Core Principles
+
+### I. Code Quality & Architectural Discipline
+
+The codebase follows a strict, registry-driven, layered architecture, and all changes MUST
+preserve it.
+
+- **Separate the CLI surface from importable logic.** User-facing commands live in Typer
+  sub-apps (e.g. `commands/`, `*/_commands.py`); business logic lives in plain, importable
+  modules with no `@app.command()` decorators. New features MUST keep orchestration logic
+  testable independently of Typer.
+- **Use the established extension pattern.** New agents/integrations MUST subclass one of the
+  standard base classes (`MarkdownIntegration`, `TomlIntegration`, `YamlIntegration`,
+  `SkillsIntegration`) and declare the required class attributes (`key`, `config`,
+  `registrar_config`, and `context_file` where applicable). Extending `IntegrationBase`
+  directly is permitted only when no base class fits, and the deviation MUST be justified.
+- **Honor the single source of truth.** Built-ins are wired through the relevant registry
+  (e.g. `INTEGRATION_REGISTRY` via `_register_builtins()`), with imports and registrations
+  kept in alphabetical order. Duplicate keys MUST fail loudly rather than silently override.
+- **Naming and typing are not optional.** Private modules/functions are `_`-prefixed and MUST
+  NOT be imported across package boundaries. Every new module begins with
+  `from __future__ import annotations` and uses modern type syntax (`dict[str, Any]`,
+  `str | None`); legacy `Dict`/`List`/`Optional` forms are rejected.
+- **Package directories use underscores; keys keep their canonical (often hyphenated) form**
+  (e.g. package `kiro_cli/`, `key = "kiro-cli"`). For CLI-backed integrations the `key` MUST
+  match the executable name so `shutil.which(key)` resolves.
+
+**Rationale:** A registry-plus-base-class architecture is what lets dozens of integrations,
+extensions, and workflows coexist with minimal coupling. Drift here multiplies maintenance
+cost and breaks the "add one subclass, register once, ship a test" contract.
+
+### II. Test-Backed Change (NON-NEGOTIABLE)
+
+Every behavioral change MUST be accompanied by automated tests, and the suite is a hard gate.
+
+- **Tests gate merges.** CI runs `pytest` across a matrix of ubuntu + windows × Python 3.11,
+  3.12, and 3.13. Changes MUST pass on every cell of that matrix.
+- **Parity invariants MUST hold.** Every integration MUST be present in the registry, have a
+  `CommandRegistrar` config entry where required, and ship a dedicated
+  `tests/integrations/test_integration_<key>.py` (hyphens in the key become underscores in the
+  filename). These are enforced by parametrized tests (e.g. `test_registry.py`) and MUST NOT
+  be weakened.
+- **Follow pytest conventions.** Test modules/classes/functions use the `test_*` / `Test*`
+  naming the project configures, run under `--strict-markers`, and isolate state with
+  `tmp_path`, `monkeypatch`, and the autouse auth-isolation fixture. Platform-specific tests
+  MUST be guarded (e.g. `@requires_bash`) rather than left to fail.
+- **Security and idempotency tests are mandatory categories.** Path-traversal rejection,
+  manifest hash integrity/symlink safety, and no-overwrite idempotency are covered by existing
+  suites; changes touching file writes, path handling, or setup scripts MUST extend (never
+  reduce) that coverage.
+- **Network is mocked.** No test may make a real outbound network call; HTTP MUST be stubbed
+  so the suite is deterministic and offline-runnable.
+
+**Rationale:** The breadth of supported agents and the offline/air-gapped guarantees can only
+be sustained by exhaustive, parametrized tests. The parity and security suites are what stop a
+single new integration from regressing the whole matrix.
+
+### III. CLI & User-Experience Consistency
+
+The CLI presents one coherent surface; every command group MUST feel like the others.
+
+- **Reuse the shared verb vocabulary.** Consumer-facing groups use the established verbs —
+  `list`, `add`/`install`, `remove`, `search`, `info`, `update`, plus `enable`/`disable` and
+  `set-priority` where relevant. New verbs MUST NOT be invented when an existing one fits, and
+  any genuinely new verb MUST be justified.
+- **Mirror the catalog-stack model.** Catalog-backed groups MUST expose
+  `<group> catalog list|add|remove`, back it with a priority-ordered source stack (lower number
+  = higher precedence) plus per-source install policy (`install-allowed` vs `discovery-only`),
+  and fall back to a built-in default stack when no project config is present.
+- **Register sub-apps the standard way.** Command groups are `typer.Typer(...)` instances
+  attached via `app.add_typer(child, name="...")`, preferably through a modular
+  `register(app)` function imported in `__init__.py`. Nesting MUST stay within ~2–3 levels.
+- **Output is consistent and machine-friendly.** Human output uses the shared Rich
+  conventions (e.g. `[green]✓[/green]` success, `[red]Error:[/red]` + non-zero exit on
+  failure, actionable remediation in messages). Where a `--json` flag is offered, valid JSON
+  goes to stdout and all other logging is redirected to stderr.
+- **Interactions are safe and idempotent.** Destructive actions show what will change before
+  confirming; "already installed / already present" outcomes succeed (exit 0) rather than
+  error. User-facing command groups MUST be documented under `docs/reference/`.
+
+**Rationale:** Predictability is the product. Users learn one set of verbs, one catalog model,
+and one output grammar, then apply them to every group — including `specify bundle`.
+
+### IV. Offline-First Performance & Resource Discipline
+
+Spec Kit is a local CLI; responsiveness, offline operability, and graceful degradation are the
+performance contract.
+
+- **`specify init` and core scaffolding MUST work fully offline** using bundled `core_pack`
+  assets. Asset resolution MUST prefer bundled assets, then a source checkout, before ever
+  reaching the network.
+- **Network use is lazy, bounded, and degradable.** Network calls happen only on explicit
+  user commands, MUST set timeouts, MUST cache catalog results (1-hour TTL) and fall back to
+  stale cache on failure, and MUST surface offline/rate-limit conditions as clear messages
+  without crashing.
+- **Keep startup cheap.** Avoid adding heavyweight work to import time. New optional
+  subsystems SHOULD prefer lazy loading over unconditional eager imports so that unrelated
+  commands (including `--help`) stay fast.
+- **Filesystem writes are minimal and idempotent.** Installs MUST track files (SHA-256
+  manifests), avoid clobbering user-modified content, only uninstall files whose hash still
+  matches, and never follow symlinks out of the project root.
+
+**Rationale:** Developers run this tool in air-gapped, enterprise, and flaky-network
+environments. Offline-first behavior and idempotent, hash-tracked file operations are what
+make it safe and fast to run repeatedly.
+
+### V. Minimal Dependencies & Safe, Idempotent File Operations
+
+The project guards its dependency surface and its on-disk footprint deliberately.
+
+- **Zero new runtime dependencies by default.** The runtime dependency set is intentionally
+  small and pinned to a minimum major version. Adding a dependency requires maintainer
+  agreement and a justification that existing deps (typer, click, rich, pyyaml, packaging,
+  platformdirs, pathspec, json5, readchar) cannot serve the need. New subsystems SHOULD reuse
+  existing primitive machinery in-process rather than re-implementing or re-shipping it.
+- **All paths are validated.** Any project-relative path derived from user/manifest/catalog
+  input MUST be confined to the project root (`Path.relative_to` checks) and reject traversal
+  payloads; symlink escapes MUST be refused.
+- **Errors are explicit and chained.** Validate inputs up front, raise with actionable context
+  (offending field/value plus a hint), and use `raise ... from exc` to preserve causes. I/O
+  that can legitimately fail MUST degrade gracefully rather than emit a raw traceback.
+- **Versioning follows SemVer.** User-visible and packaged behavior changes follow
+  MAJOR.MINOR.PATCH semantics; backward-incompatible changes MUST be called out and justified.
+
+**Rationale:** A lean, pinned dependency set and hardened, idempotent file handling are what
+keep the tool trustworthy in enterprise and air-gapped contexts and cheap to maintain.
+
+## Security & Cross-Platform Constraints
+
+- **Cross-platform parity is required.** Code MUST run on Linux, macOS, and Windows and on
+  Python 3.11–3.13. Windows specifics (UTF-8 stream reconfiguration, bash-dependent tests
+  auto-skipping) MUST be respected; do not introduce POSIX-only assumptions without a guarded
+  fallback.
+- **Security tooling is a gate.** CodeQL and the project's security test suites
+  (path-traversal, manifest/symlink hardening) MUST remain green. Network access MUST default
+  to off in tests and be opt-in, timeout-bounded, and credential-isolated at runtime.
+- **Formatting is enforced.** `.editorconfig` rules (LF endings, final newline, no trailing
+  whitespace, 4-space Python / 2-space YAML-JSON-Markdown), `ruff check src/`, and
+  `markdownlint-cli2` MUST pass.
+
+## Development Workflow & Quality Gates
+
+- **Branch naming** follows `<type>/<number>-<short-slug>` (or `<type>/<short-slug>` with no
+  issue), with `<type>` ∈ {feat, fix, docs, community, chore}.
+- **PRs are focused** and MUST: pass `ruff`, `pytest` (full matrix), markdown lint, and CodeQL;
+  add/extend tests for new behavior; update user-facing docs (`README.md`, `docs/`,
+  `spec-driven.md`) when behavior changes; and disclose any AI assistance used.
+- **Slash-command-affecting changes** MUST be manually exercised through a coding agent and the
+  results reported in the PR, per CONTRIBUTING.md.
+- **Large or cross-cutting changes** (new templates, arguments, command groups) MUST be agreed
+  with maintainers before implementation.
+
+## Governance
+
+This constitution supersedes ad-hoc convention where they conflict; the existing codebase
+patterns it codifies remain authoritative references.
+
+- **Authority.** Principles I–V are binding gates. The `## Constitution Check` section of the
+  plan template MUST be evaluated against these principles, and `/speckit.analyze` treats
+  conflicts with a MUST as CRITICAL. Violations are resolved by changing the spec, plan, or
+  tasks — not by diluting a principle.
+- **Amendments.** Changes to this document require a PR with rationale, maintainer approval,
+  and a version bump per the policy below. Any amendment MUST propagate to dependent templates
+  and command guidance in the same change, recorded in the Sync Impact Report at the top of
+  this file.
+- **Versioning policy (SemVer for governance).** MAJOR = backward-incompatible governance or
+  principle removal/redefinition; MINOR = a new principle/section or materially expanded
+  guidance; PATCH = clarifications and non-semantic refinements.
+- **Compliance review.** Every PR and review MUST verify compliance with these principles.
+  Added complexity or any deviation MUST be justified in-PR (and, for plans, in the plan's
+  Complexity Tracking section). Unjustified violations block merge.
+
+**Version**: 1.0.0 | **Ratified**: 2026-06-19 | **Last Amended**: 2026-06-19

AGENTS.md

@@ -14,7 +14,7 @@ The toolkit supports multiple AI coding assistants, allowing teams to use their
 
 Each AI agent is a self-contained **integration subpackage** under `src/specify_cli/integrations/<key>/`. The subpackage exposes a single class that declares all metadata and inherits setup/teardown logic from a base class. Built-in integrations are then instantiated and added to the global `INTEGRATION_REGISTRY` by `src/specify_cli/integrations/__init__.py` via `_register_builtins()`.
 
-```
+```text
 src/specify_cli/integrations/
 ├── __init__.py            # INTEGRATION_REGISTRY + _register_builtins()
 ├── base.py                # IntegrationBase, MarkdownIntegration, TomlIntegration, YamlIntegration, SkillsIntegration
@@ -340,18 +340,21 @@ Some agents require custom processing beyond the standard template transformatio
 ### Copilot Integration
 
 GitHub Copilot has unique requirements:
+
 - Commands use `.agent.md` extension (not `.md`)
 - Each command gets a companion `.prompt.md` file in `.github/prompts/`
 - Installs `.vscode/settings.json` with prompt file recommendations
 - Context file lives at `.github/copilot-instructions.md`
 
 Implementation: Extends `IntegrationBase` with custom `setup()` method that:
+
 1. Processes templates with `process_template()`
 2. Generates companion `.prompt.md` files
 3. Merges VS Code settings
 
 **Skills mode (`--skills`):** Copilot also supports an alternative skills-based layout
 via `--integration-options="--skills"`. When enabled:
+
 - Commands are scaffolded as `speckit-<name>/SKILL.md` under `.github/skills/`
 - No companion `.prompt.md` files are generated
 - No `.vscode/settings.json` merge
@@ -371,11 +374,13 @@ specify init my-project --integration copilot --integration-options="--skills"
 ### Forge Integration
 
 Forge has special frontmatter and argument requirements:
+
 - Uses `{{parameters}}` instead of `$ARGUMENTS`
 - Strips `handoffs` frontmatter key (Forge-specific collaboration feature)
 - Injects `name` field into frontmatter when missing
 
 Implementation: Extends `MarkdownIntegration` with custom `setup()` method that:
+
 1. Inherits standard template processing from `MarkdownIntegration`
 2. Adds extra `$ARGUMENTS` → `{{parameters}}` replacement after template processing
 3. Applies Forge-specific transformations via `_apply_forge_transformations()`
@@ -385,11 +390,13 @@ Implementation: Extends `MarkdownIntegration` with custom `setup()` method that:
 ### Goose Integration
 
 Goose is a YAML-format agent using Block's recipe system:
+
 - Uses `.goose/recipes/` directory for YAML recipe files
 - Uses `{{args}}` argument placeholder
 - Produces YAML with `prompt: |` block scalar for command content
 
 Implementation: Extends `YamlIntegration` (parallel to `TomlIntegration`):
+
 1. Processes templates through the standard placeholder pipeline
 2. Extracts title and description from frontmatter
 3. Renders output as Goose recipe YAML (version, title, description, author, extensions, activities, prompt)
@@ -400,7 +407,7 @@ Implementation: Extends `YamlIntegration` (parallel to `TomlIntegration`):
 
 Branches follow one of two patterns depending on whether an issue exists:
 
-```
+```text
 <type>/<number>-<short-slug>   # when an issue is created first
 <type>/<short-slug>            # when no issue exists (PR-only changes)
 ```
@@ -463,6 +470,7 @@ Disclosure is **continuous**, not a one-time event. A single AI-disclosure parag
 3. **Incorrect `requires_cli` value**: Set to `True` only for agents that have a CLI tool; set to `False` for IDE-based agents.
 4. **Wrong argument format**: Use `$ARGUMENTS` for Markdown agents, `{{args}}` for TOML agents.
 5. **Skipping registration**: The import and `_register()` call in `_register_builtins()` must both be added.
+6. **Running tests against the wrong environment**: Always run the suite inside this working tree's own virtualenv (`uv sync --extra test` then `.venv/bin/python -m pytest`, or activate the venv first). A bare `uv run pytest` can resolve to an ambient/global interpreter whose editable `.pth` points at a *different* worktree. The failure is sneaky: test collection still imports `specify_cli` successfully, but newly-added subpackages (e.g. a fresh `specify_cli/bundler/`) resolve as a stale namespace package and raise `ModuleNotFoundError`. If a brand-new subpackage imports under `python -c` but not under pytest, suspect environment contamination, not your code.
 
 ---
 

CONTRIBUTING.md

@@ -95,6 +95,24 @@ uv run python -m pytest tests/test_agent_config_consistency.py -q
 
 Run this when you change agent metadata, context update scripts, or integration wiring.
 
+#### Running the full test suite
+
+Install the test dependencies into the project's own virtual environment and run
+`pytest` through that interpreter:
+
+```bash
+uv pip install -e ".[test]"
+.venv/bin/python -m pytest tests -q   # Windows: .venv\Scripts\python -m pytest tests -q
+```
+
+> **Note:** prefer `.venv/bin/python -m pytest` over a bare `uv run pytest`.
+> If another Spec Kit checkout has an editable (`-e`) install registered in a
+> shared/global environment, `uv run pytest` can resolve `specify_cli` to that
+> *other* worktree, turning it into a partial namespace package that fails to
+> import newly added subpackages. Running through the project `.venv` resolves
+> `specify_cli` to this checkout's `src/`. This matches the gotcha documented in
+> `AGENTS.md` (Common Pitfalls).
+
 ### Manual testing
 
 #### Testing setup

README.md

@@ -26,6 +26,7 @@
 - [🤖 Supported AI Coding Agent Integrations](#-supported-ai-coding-agent-integrations)
 - [🔧 Specify CLI Reference](#-specify-cli-reference)
 - [🧩 Making Spec Kit Your Own: Extensions & Presets](#-making-spec-kit-your-own-extensions--presets)
+- [📦 Bundles: Role-Based Setups](#-bundles-role-based-setups)
 - [📚 Core Philosophy](#-core-philosophy)
 - [🌟 Development Phases](#-development-phases)
 - [🎯 Experimental Goals](#-experimental-goals)
@@ -228,6 +229,56 @@ For example, presets could restructure spec templates to require regulatory trac
 
 See the [Presets reference](https://github.github.io/spec-kit/reference/presets.html) for the full command guide, including resolution order and priority stacking.
 
+## 📦 Bundles: Role-Based Setups
+
+Extensions and presets are individual building blocks. A **bundle** packages a
+curated set of them — extensions, presets, steps, and workflows — into a single,
+versioned, role-oriented setup so a whole team persona (product manager, business
+analyst, security researcher, developer, …) can be provisioned with one command.
+
+A bundle is described by a hand-written `bundle.yml` manifest. It pins each
+component to a version and, optionally, targets a specific integration; a bundle
+with no `integration` is **agnostic** and inherits whatever integration the
+project already uses.
+
+```bash
+# Discover bundles in the active catalog stack
+specify bundle search [<query>]
+
+# Inspect the exact component set a bundle will add (equals what install does)
+specify bundle info <bundle-id>
+
+# Install a bundle's full component set in one operation
+specify bundle install <bundle-id>
+
+# See what's installed, then update or remove non-destructively
+specify bundle list
+specify bundle update <bundle-id>     # or --all
+specify bundle remove <bundle-id>     # removes only this bundle's components
+```
+
+Bundles resolve from a **priority-ordered catalog stack** (project > user >
+built-in). Each source carries an install policy: `install-allowed` sources can
+be installed from, while `discovery-only` sources are visible in `search`/`info`
+but refuse installation. Manage the stack with `specify bundle catalog list|add|remove`.
+
+Authors validate and package bundles locally — there is no first-class publish;
+distribution is hosting the built artifact and adding a catalog entry:
+
+```bash
+specify bundle validate --path ./my-bundle      # structural + reference checks
+specify bundle build --path ./my-bundle         # produce a versioned .zip artifact
+```
+
+Four ready-to-read example manifests live under
+[`examples/bundles/`](examples/bundles/) (product manager, business analyst,
+security researcher, developer).
+
+Key guarantees: `info` shows exactly what `install` adds (transparency);
+installs are idempotent and confined to the project root; `remove` never touches
+components another installed bundle still needs; and all consume/author commands
+work **offline** against local or pinned sources.
+
 ### When to Use Which
 
 | Goal | Use |
@@ -237,6 +288,7 @@ See the [Presets reference](https://github.github.io/spec-kit/reference/presets.
 | Integrate an external tool or service | Extension |
 | Enforce organizational or regulatory standards | Preset |
 | Ship reusable domain-specific templates | Either — presets for template overrides, extensions for templates bundled with new commands |
+| Provision a complete role-based setup in one command | Bundle |
 
 ## 📚 Core Philosophy
 

docs/reference/bundles.md

@@ -0,0 +1,156 @@
+# Bundles
+
+Bundles compose existing Spec Kit components — extensions, presets, workflows, and steps — into a single, versioned, installable unit. Where extensions and presets are primitives, a bundle is a curated stack that declares everything a team or role needs and installs it in one step through each component's own machinery. Bundles add no new runtime behavior of their own: they are a distribution and composition layer over the primitives you already use.
+
+A bundle is described by a `bundle.yml` manifest and is discovered through the same catalog stack as other components. Installing a bundle resolves its declared components against pinned versions, checks for the single cross-bundle conflict point (the active integration), and applies each component idempotently with full provenance tracking so it can be cleanly removed or refreshed later.
+
+## Search Available Bundles
+
+```bash
+specify bundle search [query]
+```
+
+| Option      | Description                  |
+| ----------- | ---------------------------- |
+| `--offline` | Do not access the network    |
+| `--json`    | Emit machine-readable JSON   |
+
+Searches all active catalogs for bundles matching the query. Without a query, lists every available bundle with its version, role, source, and a trust indicator (`verified` for org-curated catalog entries, `community` otherwise) so you can judge trust before installing.
+
+## Bundle Info
+
+```bash
+specify bundle info <bundle_id>
+```
+
+| Option       | Description                       |
+| ------------ | --------------------------------- |
+| `--offline`  | Do not access the network         |
+| `--json`     | Emit machine-readable JSON        |
+
+Shows full metadata for a bundle along with the **fully expanded component set** it installs — every extension, preset, step, and workflow with its pinned version, plus preset priority and strategy. The output also includes a trust indicator (`verified` vs `community`) so you can judge trust before installing. This preview is the same plan `install` applies, so you can see exactly what will be added before committing. Foreseeable overlaps with components already provided by installed bundles are surfaced here as well.
+
+## Install a Bundle
+
+```bash
+specify bundle install <bundle_id | path>
+```
+
+| Option           | Description                                                         |
+| ---------------- | ------------------------------------------------------------------ |
+| `--integration`  | Override the integration used when initializing/installing         |
+| `--offline`      | Do not access the network                                          |
+
+Installs a bundle's full component set through each primitive's machinery. The argument may be a catalog bundle id, or a local path to a built `.zip` artifact, a bundle directory, or a `bundle.yml` file; local sources install directly without consulting the catalog stack.
+
+If the current directory is not yet a Spec Kit project, `install` initializes one first so a fresh checkout reaches a working state in a single command. `--integration` selects the integration when initializing a new project, and confirms the target when a bundle pins a specific integration but the project's active integration can't be determined (missing or unreadable `.specify/integration.json`). It does **not** override an already-initialized project's active integration: if a bundle targets a different integration than the project's, install aborts with no changes. Integration-agnostic bundles inherit the project's active integration. Installation is idempotent — components already present are skipped. On failure, no provenance record is written (a failed install records nothing), and the components installed during that run are removed on a best-effort basis — removal errors are swallowed, so partial on-disk state may remain.
+
+## Update Bundles
+
+```bash
+specify bundle update [<bundle_id>]
+```
+
+| Option       | Description                          |
+| ------------ | ------------------------------------ |
+| `--all`      | Update every installed bundle        |
+| `--offline`  | Do not access the network            |
+
+Re-resolves a bundle and **refreshes** its components through each primitive's update path, bringing already-installed components up to the bundle's newly pinned versions while preserving primitive-level overrides (such as preset priority). Provide a bundle id, or use `--all` to update everything installed.
+
+> **Pin enforcement is install-time only.** Idempotency checks are id-based, not version-aware: a component that is already present is skipped during `install` without comparing its on-disk version to the manifest pin. Version pins are therefore guaranteed to be applied only when the bundler actually installs a component for the first time or refreshes it. Run `specify bundle update` to re-apply every owned component at its pinned version.
+
+## Remove a Bundle
+
+```bash
+specify bundle remove <bundle_id>
+```
+
+Uninstalls only the components this bundle contributed, leaving any component that another installed bundle still needs in place (no collateral removals).
+
+## List Installed Bundles
+
+```bash
+specify bundle list
+```
+
+| Option   | Description                  |
+| -------- | ---------------------------- |
+| `--json` | Emit machine-readable JSON   |
+
+Lists the bundles installed in the project with their versions, component counts, and install timestamps.
+
+## Initialize a Project with a Bundle
+
+```bash
+specify bundle init [<bundle_id>]
+```
+
+| Option           | Description                              |
+| ---------------- | ---------------------------------------- |
+| `--integration`  | Integration override                     |
+| `--offline`      | Do not access the network                |
+
+Ensures the current directory is a Spec Kit project (initializing it idempotently if needed), then optionally installs the given bundle. Useful as an explicit one-step bootstrap for a new checkout.
+
+## Validate a Bundle
+
+```bash
+specify bundle validate
+```
+
+| Option       | Description                                                          |
+| ------------ | ------------------------------------------------------------------- |
+| `--path`     | Bundle directory or `bundle.yml` (default: current directory)       |
+| `--offline`  | Verify references against bundled/installed components only          |
+
+Reports whether a `bundle.yml` is well-formed and whether every declared component reference resolves. References are checked against bundled components, the project's installed components, and — when online — the active catalogs. Validation fails only when a reference is definitively absent everywhere it could be checked: that is, when an active catalog is reachable and confirms the component is missing. References that cannot be verified — because validation is offline, or because a catalog is unreachable — are downgraded to warnings so authoring can continue, rather than failing the run.
+
+## Build a Bundle Artifact
+
+```bash
+specify bundle build
+```
+
+| Option      | Description                                              |
+| ----------- | ------------------------------------------------------- |
+| `--path`    | Bundle directory (default: current directory)           |
+| `--output`  | Output directory for the artifact                       |
+
+Produces a single versioned, distributable `.zip` artifact from a bundle directory. The artifact embeds the manifest and can be installed directly with `specify bundle install <artifact.zip>`.
+
+## Manage Catalog Sources
+
+Bundles are discovered through a priority-ordered stack of catalog sources (project, user, and built-in scopes).
+
+### List the Catalog Stack
+
+```bash
+specify bundle catalog list
+```
+
+Prints the active, priority-ordered catalog stack with each source's scope and install policy.
+
+### Add a Catalog Source
+
+```bash
+specify bundle catalog add <url>
+```
+
+| Option        | Description                                              |
+| ------------- | ------------------------------------------------------- |
+| `--policy`    | `install-allowed` or `discovery-only`                   |
+| `--priority`  | Source priority (lower = higher precedence; default 10) |
+| `--id`        | Explicit source id                                      |
+
+Registers a project-scoped catalog source and persists it.
+
+### Remove a Catalog Source
+
+```bash
+specify bundle catalog remove <id_or_url>
+```
+
+Removes a project-scoped catalog source. Built-in default sources cannot be deleted.
+
+> **Note:** `search` and `info` work anywhere — with no project they fall back to the built-in/user catalog stack. The remaining state-changing commands (`list`, `update`, `remove`, `catalog`) require a project already initialized with `specify init`. `install` and `init` will initialize a project on demand when run in an uninitialized directory.

docs/reference/overview.md

@@ -31,3 +31,9 @@ Presets customize how Spec Kit works — overriding command files, template file
 Workflows automate multi-step Spec-Driven Development processes into repeatable sequences. They chain commands, prompts, shell steps, and human checkpoints together, with support for conditional logic, loops, fan-out/fan-in, and the ability to pause and resume from the exact point of interruption.
 
 [Workflows reference →](workflows.md)
+
+## Bundles
+
+Bundles compose existing extensions, presets, workflows, and steps into a single, versioned, installable unit. Rather than adding new behavior, a bundle curates a stack of primitives — everything a team or role needs — and installs it in one step through each component's own machinery, with version pinning, conflict checks, and provenance tracking for clean updates and removal.
+
+[Bundles reference →](bundles.md)

examples/bundles/business-analyst/README.md

@@ -0,0 +1,22 @@
+# Business Analyst bundle
+
+A role bundle for business analysts working in a Spec-Driven Development flow:
+requirements elicitation, traceability, and acceptance criteria.
+
+## What it installs
+
+- **Extension** `agent-context` — keeps the agent context file in sync.
+- **Preset** `requirements-elicitation` (priority 10, append) — elicitation and
+  analysis command set.
+- **Steps** `capture-requirements`, `trace-acceptance-criteria`.
+- **Workflow** `requirements-to-spec` — turns captured requirements into a spec.
+
+This bundle is **integration-agnostic**: it inherits the project's active
+integration.
+
+## Usage
+
+```bash
+specify bundle validate --path examples/bundles/business-analyst
+specify bundle build --path examples/bundles/business-analyst --output dist/
+```

examples/bundles/business-analyst/bundle.yml

@@ -0,0 +1,33 @@
+schema_version: "1.0"
+
+bundle:
+  id: "business-analyst"
+  name: "Business Analyst"
+  version: "1.0.0"
+  role: "business-analyst"
+  description: "Spec-Driven Development setup for business analysts: requirements elicitation, traceability, and acceptance criteria."
+  author: "spec-kit-examples"
+  license: "MIT"
+
+requires:
+  speckit_version: ">=0.9.0"
+  tools: []
+  mcp: []
+
+provides:
+  extensions:
+    - id: "agent-context"
+      version: "1.0.0"
+  presets:
+    - id: "requirements-elicitation"
+      version: "1.0.0"
+      priority: 10
+      strategy: "append"
+  steps:
+    - id: "capture-requirements"
+    - id: "trace-acceptance-criteria"
+  workflows:
+    - id: "requirements-to-spec"
+      version: "1.0.0"
+
+tags: ["requirements", "traceability", "analysis"]

examples/bundles/developer/README.md

@@ -0,0 +1,22 @@
+# Developer bundle
+
+A role bundle for developers practicing Spec-Driven Development: implementation
+planning, task breakdown, and code review.
+
+## What it installs
+
+- **Extension** `agent-context` — keeps the agent context file in sync.
+- **Preset** `implementation-planning` (priority 10, append) — implementation
+  planning command set.
+- **Steps** `plan-implementation`, `break-down-tasks`.
+- **Workflow** `spec-to-implementation` — drives a spec through to code.
+
+This bundle is **integration-agnostic**: it inherits the project's active
+integration.
+
+## Usage
+
+```bash
+specify bundle validate --path examples/bundles/developer
+specify bundle build --path examples/bundles/developer --output dist/
+```

examples/bundles/developer/bundle.yml

@@ -0,0 +1,33 @@
+schema_version: "1.0"
+
+bundle:
+  id: "developer"
+  name: "Developer"
+  version: "1.0.0"
+  role: "developer"
+  description: "Spec-Driven Development setup for developers: implementation planning, task breakdown, and code review."
+  author: "spec-kit-examples"
+  license: "MIT"
+
+requires:
+  speckit_version: ">=0.9.0"
+  tools: []
+  mcp: []
+
+provides:
+  extensions:
+    - id: "agent-context"
+      version: "1.0.0"
+  presets:
+    - id: "implementation-planning"
+      version: "1.0.0"
+      priority: 10
+      strategy: "append"
+  steps:
+    - id: "plan-implementation"
+    - id: "break-down-tasks"
+  workflows:
+    - id: "spec-to-implementation"
+      version: "1.0.0"
+
+tags: ["development", "implementation", "code-review"]

examples/bundles/product-manager/README.md

@@ -0,0 +1,22 @@
+# Product Manager bundle
+
+A role bundle that prepares a Spec Kit project for product managers driving
+Spec-Driven Development: discovery, specification, and roadmap planning.
+
+## What it installs
+
+- **Extension** `agent-context` — keeps the agent context file in sync.
+- **Preset** `product-discovery` (priority 10, append) — discovery-oriented
+  command set.
+- **Steps** `draft-spec`, `review-spec` — specification authoring steps.
+- **Workflow** `spec-to-roadmap` — turns an approved spec into a roadmap.
+
+This bundle is **integration-agnostic**: it inherits whatever integration the
+project already uses (e.g. `copilot`, `claude`).
+
+## Usage
+
+```bash
+specify bundle validate --path examples/bundles/product-manager
+specify bundle build --path examples/bundles/product-manager --output dist/
+```

examples/bundles/product-manager/bundle.yml

@@ -0,0 +1,35 @@
+schema_version: "1.0"
+
+bundle:
+  id: "product-manager"
+  name: "Product Manager"
+  version: "1.0.0"
+  role: "product-manager"
+  description: "Spec-Driven Development setup for product managers: discovery, specification, and roadmap workflows."
+  author: "spec-kit-examples"
+  license: "MIT"
+
+requires:
+  speckit_version: ">=0.9.0"
+  tools: []
+  mcp: []
+
+# Agnostic bundle: inherits the project's active integration.
+
+provides:
+  extensions:
+    - id: "agent-context"
+      version: "1.0.0"
+  presets:
+    - id: "product-discovery"
+      version: "1.0.0"
+      priority: 10
+      strategy: "append"
+  steps:
+    - id: "draft-spec"
+    - id: "review-spec"
+  workflows:
+    - id: "spec-to-roadmap"
+      version: "1.0.0"
+
+tags: ["product", "discovery", "roadmap"]

examples/bundles/security-researcher/README.md

@@ -0,0 +1,23 @@
+# Security Researcher bundle
+
+A role bundle for security researchers practicing Spec-Driven Development:
+threat modeling, security review, and compliance.
+
+## What it installs
+
+- **Extension** `agent-context` — keeps the agent context file in sync.
+- **Preset** `security-compliance` (priority 5, append) — security and
+  compliance command set; presets apply in ascending priority order, so this
+  low number (5) places it ahead of higher-numbered presets in the stack.
+- **Steps** `threat-model`, `security-review`.
+- **Workflow** `secure-sdd` — a security-first SDD workflow.
+
+This bundle is **integration-agnostic**: it inherits the project's active
+integration.
+
+## Usage
+
+```bash
+specify bundle validate --path examples/bundles/security-researcher
+specify bundle build --path examples/bundles/security-researcher --output dist/
+```

examples/bundles/security-researcher/bundle.yml

@@ -0,0 +1,33 @@
+schema_version: "1.0"
+
+bundle:
+  id: "security-researcher"
+  name: "Security Researcher"
+  version: "1.0.0"
+  role: "security-researcher"
+  description: "Spec-Driven Development setup for security researchers: threat modeling, security review, and compliance checks."
+  author: "spec-kit-examples"
+  license: "MIT"
+
+requires:
+  speckit_version: ">=0.9.0"
+  tools: []
+  mcp: []
+
+provides:
+  extensions:
+    - id: "agent-context"
+      version: "1.0.0"
+  presets:
+    - id: "security-compliance"
+      version: "1.0.0"
+      priority: 5
+      strategy: "append"
+  steps:
+    - id: "threat-model"
+    - id: "security-review"
+  workflows:
+    - id: "secure-sdd"
+      version: "1.0.0"
+
+tags: ["security", "compliance", "threat-modeling"]

src/specify_cli/__init__.py

@@ -609,6 +609,13 @@ from .presets._commands import register as _register_preset_cmds  # noqa: E402
 _register_preset_cmds(app)
 
 
+# ===== Bundle Commands =====
+
+# Bundler subcommand group (specify bundle ...) — see commands/bundle/.
+from .commands.bundle import register as _register_bundle_cmds  # noqa: E402
+_register_bundle_cmds(app)
+
+
 # ===== Extension Commands =====
 
 

src/specify_cli/bundler/__init__.py

@@ -0,0 +1,19 @@
+"""Spec Kit bundler — importable, Typer-free logic for the ``specify bundle`` group.
+
+This package holds the models, services, and helpers behind the ``specify bundle``
+subcommand. It is intentionally free of any Typer/CLI imports so the orchestration
+logic can be unit-tested independently of the command surface (Constitution
+Principle I). The CLI wiring lives in ``specify_cli.commands.bundle``.
+"""
+from __future__ import annotations
+
+__all__ = ["BundlerError"]
+
+
+class BundlerError(Exception):
+    """Base class for all actionable bundler errors.
+
+    Carrying a clean message lets the CLI layer print a single, user-facing line
+    on stderr and exit non-zero without leaking a traceback (Constitution
+    Principle V — explicit, actionable errors).
+    """

src/specify_cli/bundler/commands_impl/__init__.py

@@ -0,0 +1,2 @@
+"""Bundler command-implementation helpers (kept thin; logic lives in services)."""
+from __future__ import annotations

src/specify_cli/bundler/commands_impl/catalog_config.py

@@ -0,0 +1,191 @@
+"""Persistence for the project-scoped catalog config (``.specify/bundle-catalogs.yml``).
+
+Only project scope is writable; built-in defaults are never deleted (they can be
+overridden by adding a same-id source). The on-disk shape mirrors
+``bundle-catalog.schema.md``: ``{schema_version, catalogs: [{id,url,priority,install_policy}]}``.
+"""
+from __future__ import annotations
+
+from pathlib import Path
+from urllib.parse import urlparse
+import re
+
+from .. import BundlerError
+from ..lib.yamlio import dump_yaml, ensure_within, load_yaml
+from ..models.catalog import (
+    CONFIG_FILENAME,
+    BUILTIN_DEFAULT_STACK,
+    CatalogSource,
+    InstallPolicy,
+    Scope,
+)
+
+CONFIG_SCHEMA_VERSION = "1.0"
+
+_BUILTIN_IDS = {raw["id"] for raw in BUILTIN_DEFAULT_STACK}
+
+# Windows absolute paths like ``C:\catalog.json`` parse with a single-letter
+# ``scheme`` under urlparse; treat them as local files rather than URLs.
+_WINDOWS_DRIVE_RE = re.compile(r"^[A-Za-z]:[\\/]")
+
+
+def _config_path(project_root: Path) -> Path:
+    return Path(project_root) / ".specify" / CONFIG_FILENAME
+
+
+def _read(project_root: Path) -> list[dict]:
+    # Confine the read (parity with the write path's within= guard): refuse to
+    # follow a symlinked or traversal-escaping .specify that resolves outside
+    # project_root.
+    path = ensure_within(project_root, _config_path(project_root))
+    if not path.exists():
+        return []
+    data = load_yaml(path)
+    if data is None:
+        return []
+    if not isinstance(data, dict):
+        raise BundlerError(
+            f"Malformed catalog config at {path}: expected a mapping at the top "
+            f"level, got {type(data).__name__}."
+        )
+    schema_version = data.get("schema_version")
+    if schema_version is not None and (
+        str(schema_version).strip().split(".")[0]
+        != CONFIG_SCHEMA_VERSION.split(".")[0]
+    ):
+        raise BundlerError(
+            f"Unsupported catalog config schema version "
+            f"'{str(schema_version).strip()}' at {path}; this Spec Kit "
+            f"understands version {CONFIG_SCHEMA_VERSION}. The file may have been "
+            "written by a newer version or is corrupt."
+        )
+    catalogs = data.get("catalogs")
+    if catalogs is None:
+        return []
+    if not isinstance(catalogs, list):
+        raise BundlerError(
+            f"Malformed catalog config at {path}: 'catalogs' must be a list, "
+            f"got {type(catalogs).__name__}."
+        )
+    for entry in catalogs:
+        if not isinstance(entry, dict):
+            raise BundlerError(
+                f"Malformed catalog config at {path}: each catalog entry must be "
+                f"a mapping, got {type(entry).__name__}."
+            )
+    return list(catalogs)
+
+
+def _write(project_root: Path, catalogs: list[dict]) -> None:
+    payload = {"schema_version": CONFIG_SCHEMA_VERSION, "catalogs": catalogs}
+    dump_yaml(_config_path(project_root), payload, within=project_root)
+
+
+def _slug(value: str) -> str:
+    # Lowercase so derived ids are deterministic and case-insensitive across
+    # platforms (e.g. 'Team-A.json' and 'team-a.json' yield the same id),
+    # keeping the case-sensitive duplicate check from admitting logical dupes.
+    return "".join(ch if ch.isalnum() else "-" for ch in value.lower()).strip("-")
+
+
+_REMOTE_SCHEMES = {"http", "https", "file", "builtin"}
+
+
+def _is_local_path(url: str) -> bool:
+    """True when *url* denotes a local filesystem path rather than a URL."""
+    if _WINDOWS_DRIVE_RE.match(url):
+        return True
+    scheme = urlparse(url).scheme.lower()
+    return scheme not in _REMOTE_SCHEMES
+
+
+def _canonicalize_url(url: str) -> str:
+    """Make local file paths absolute so config is independent of the caller's cwd.
+
+    Remote URLs (``http(s)://``, ``file://``, ``builtin://``) are returned
+    unchanged; only bare/relative local paths are resolved to an absolute path.
+    """
+    if _is_local_path(url):
+        return str(Path(url).expanduser().resolve())
+    return url
+
+
+def _derive_id(url: str) -> str:
+    parsed = urlparse(url)
+    if parsed.netloc:
+        # Use .hostname (not netloc.split(':')) so credentials, ports, and IPv6
+        # literals (e.g. https://[2001:db8::1]/x) are handled correctly. Use the
+        # full host (TLD included) so different domains sharing a second-level
+        # label (example.com vs example.net) don't collide. _slug() lowercases
+        # and turns separators into dashes, so 'Example.com' -> 'example-com'.
+        host = parsed.hostname or ""
+        path_stem = Path(parsed.path).stem if parsed.path else ""
+        parts = [p for p in (_slug(host), _slug(path_stem)) if p]
+        return "-".join(parts) or "catalog"
+    stem = Path(parsed.path or url).stem
+    return _slug(stem) or "catalog"
+
+
+def add_source(
+    project_root: Path,
+    url: str,
+    *,
+    policy: str,
+    priority: int,
+    source_id: str | None = None,
+) -> CatalogSource:
+    url = url.strip()
+    if not url:
+        raise BundlerError("A catalog url is required.")
+    parsed = urlparse(url)
+    if not (parsed.scheme or parsed.path):
+        raise BundlerError(f"Invalid catalog url: '{url}'.")
+    # Reject unsupported URL schemes (e.g. ssh://, ftp://) up front so they are
+    # never silently canonicalized as local filesystem paths. Local paths that
+    # merely contain a ':' but no '://' (e.g. Windows drives) are still allowed.
+    if "://" in url and parsed.scheme.lower() not in _REMOTE_SCHEMES:
+        raise BundlerError(
+            f"Unsupported catalog url scheme '{parsed.scheme}://' in '{url}'. "
+            "Use http(s)://, file://, builtin://, or a local path."
+        )
+
+    url = _canonicalize_url(url)
+    install_policy = InstallPolicy.parse(policy)
+    resolved_id = (source_id or _derive_id(url)).strip()
+
+    catalogs = _read(project_root)
+    for existing in catalogs:
+        if existing.get("id") == resolved_id or existing.get("url") == url:
+            raise BundlerError(
+                f"Catalog source '{resolved_id}' (or url) already exists in this project."
+            )
+
+    entry = {
+        "id": resolved_id,
+        "url": url,
+        "priority": int(priority),
+        "install_policy": install_policy.value,
+    }
+    catalogs.append(entry)
+    _write(project_root, catalogs)
+    return CatalogSource.from_dict(entry, Scope.PROJECT)
+
+
+def remove_source(project_root: Path, id_or_url: str) -> str:
+    target = id_or_url.strip()
+    if target in _BUILTIN_IDS:
+        raise BundlerError(
+            f"'{target}' is a built-in default source and cannot be deleted "
+            "(add a same-id source to override it instead)."
+        )
+
+    catalogs = _read(project_root)
+    remaining = [
+        c for c in catalogs if c.get("id") != target and c.get("url") != target
+    ]
+    if len(remaining) == len(catalogs):
+        raise BundlerError(
+            f"No project-scoped catalog source matching '{target}' was found."
+        )
+    _write(project_root, remaining)
+    return target

src/specify_cli/bundler/lib/__init__.py

@@ -0,0 +1,2 @@
+"""Shared, dependency-light helpers for the bundler (YAML/JSON IO, versioning, project detection)."""
+from __future__ import annotations

src/specify_cli/bundler/lib/project.py

@@ -0,0 +1,62 @@
+"""Spec Kit project detection and active-integration resolution."""
+from __future__ import annotations
+
+from pathlib import Path
+
+from .. import BundlerError
+from .yamlio import ensure_within, load_json
+
+DEFAULT_INTEGRATION = "copilot"
+
+
+def find_project_root(start: Path | None = None) -> Path | None:
+    """Return the nearest ancestor (incl. *start*) containing a ``.specify/`` dir, or None.
+
+    A symlinked ``.specify`` is not accepted as a project root: following it
+    could read/write outside the intended tree, and other CLI surfaces refuse
+    it for the same reason.
+    """
+    current = Path(start or Path.cwd()).resolve()
+    for candidate in (current, *current.parents):
+        marker = candidate / ".specify"
+        if marker.is_dir() and not marker.is_symlink():
+            return candidate
+    return None
+
+
+def require_project_root(start: Path | None = None) -> Path:
+    """Return the Spec Kit project root or raise an actionable error."""
+    root = find_project_root(start)
+    if root is None:
+        raise BundlerError(
+            "Not a Spec Kit project (no .specify/ directory). "
+            "Run 'specify bundle init' or 'specify init' first."
+        )
+    return root
+
+
+def active_integration(project_root: Path) -> str | None:
+    """Return the project's active integration id, if recorded.
+
+    Spec Kit records the chosen integration in ``.specify/integration.json``
+    during init. Returns None when it cannot be determined (e.g. agnostic).
+    """
+    marker = Path(project_root) / ".specify" / "integration.json"
+    # Confine the read (mirrors records/catalog IO): refuse to follow a
+    # symlinked or traversal-escaping .specify that resolves outside
+    # project_root. An escape is treated as "not determinable".
+    try:
+        marker = ensure_within(project_root, marker)
+    except BundlerError:
+        return None
+    if not marker.exists():
+        return None
+    try:
+        data = load_json(marker)
+    except BundlerError:
+        return None
+    if isinstance(data, dict):
+        value = data.get("integration") or data.get("id") or data.get("active")
+        if isinstance(value, str) and value:
+            return value
+    return None

src/specify_cli/bundler/lib/versioning.py

@@ -0,0 +1,99 @@
+"""SemVer parsing and constraint evaluation, built on ``packaging`` (already a dependency)."""
+from __future__ import annotations
+
+import re
+
+from packaging.specifiers import InvalidSpecifier, SpecifierSet
+from packaging.version import InvalidVersion, Version
+
+from .. import BundlerError
+
+# Common SemVer prerelease spellings (``1.2.3-rc1``, ``1.2.3-alpha.1``) that
+# PEP 440 / ``packaging`` rejects verbatim. Normalized to PEP 440 before
+# parsing so prerelease versions validate consistently (mirrors
+# ``specify_cli._version._normalize_tag``).
+_PRERELEASE_PATTERN = re.compile(
+    r"^([0-9]+\.[0-9]+\.[0-9]+)[-.]?(alpha|beta|a|b|rc)[-.]?([0-9]+)(.*)$",
+    flags=re.IGNORECASE,
+)
+
+
+def _normalize_semver(value: str) -> str:
+    """Normalize common SemVer prerelease spellings into PEP 440 text."""
+    text = str(value)
+    normalized = text[1:] if text[:1] in ("v", "V") else text
+    match = _PRERELEASE_PATTERN.match(normalized)
+    if match is None:
+        return normalized
+    base, label, number, rest = match.groups()
+    pep440_label = {"alpha": "a", "beta": "b"}.get(label.lower(), label.lower())
+    return f"{base}{pep440_label}{number}{rest}"
+
+
+def parse_version(value: str) -> Version:
+    """Parse a version string into a comparable :class:`Version`."""
+    try:
+        return Version(_normalize_semver(value))
+    except InvalidVersion as exc:
+        raise BundlerError(f"Invalid version '{value}': {exc}") from exc
+
+
+_SPECIFIER_CLAUSE = re.compile(r"^\s*(===|==|~=|!=|<=|>=|<|>)?\s*(.*?)\s*$")
+
+
+def _normalize_constraint(value: str) -> str:
+    """Normalize the version portion of each clause in a constraint string.
+
+    ``packaging.SpecifierSet`` rejects SemVer prerelease spellings like
+    ``>=1.2.3-rc1`` verbatim, even though :func:`parse_version` accepts the same
+    spelling for installed versions. Normalize each comma-separated clause's
+    version so prerelease handling is consistent across versions and constraints.
+    """
+    clauses = []
+    for raw in str(value).split(","):
+        if not raw.strip():
+            continue
+        match = _SPECIFIER_CLAUSE.match(raw)
+        operator, version = match.groups()
+        clauses.append(f"{operator or ''}{_normalize_semver(version)}")
+    return ",".join(clauses)
+
+
+def parse_constraint(value: str) -> SpecifierSet:
+    """Parse a version constraint such as ``>=0.9.0`` into a :class:`SpecifierSet`."""
+    try:
+        return SpecifierSet(_normalize_constraint(value))
+    except InvalidSpecifier as exc:
+        raise BundlerError(
+            f"Invalid version constraint '{value}': {exc}"
+        ) from exc
+
+
+def satisfies(installed: str, constraint: str) -> bool:
+    """Return True if *installed* satisfies *constraint* (e.g. ``">=0.9.0"``).
+
+    Pre-releases are allowed so a dev/pre build of Spec Kit still counts.
+    """
+    spec = parse_constraint(constraint)
+    version = parse_version(installed)
+    return spec.contains(version, prereleases=True)
+
+
+_SEMVER_RE = re.compile(
+    r"^(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)"
+    r"(?:-(?:(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)"
+    r"(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?"
+    r"(?:\+(?:[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$"
+)
+
+
+def is_semver(value: str) -> bool:
+    """Return True only for a full ``MAJOR.MINOR.PATCH`` SemVer string.
+
+    Stricter than ``packaging.version.Version``, which also accepts partial
+    versions like ``"1"`` or ``"1.0"``. An optional leading ``v`` or ``V`` is
+    tolerated (mirrors ``_normalize_semver``).
+    """
+    text = str(value)
+    core = text[1:] if text[:1] in ("v", "V") else text
+    return bool(_SEMVER_RE.match(core))

src/specify_cli/bundler/lib/yamlio.py

@@ -0,0 +1,119 @@
+"""YAML/JSON read-write helpers with path confinement (Constitution Principles IV & V).
+
+All reads/writes go through these functions so that:
+- IO failures degrade into actionable :class:`~specify_cli.bundler.BundlerError`s
+  rather than raw tracebacks, and
+- every path can be confined to an allowed root via :func:`ensure_within`.
+"""
+from __future__ import annotations
+
+import json
+import os
+import re
+from pathlib import Path, PurePosixPath
+from typing import Any
+
+import yaml
+
+from .. import BundlerError
+
+
+def ensure_within(root: Path, candidate: Path) -> Path:
+    """Resolve *candidate* and guarantee it stays within *root*.
+
+    Refuses path-traversal payloads and symlink escapes. Returns the resolved,
+    confined path. Raises :class:`BundlerError` if the path escapes *root*.
+    """
+    root_resolved = Path(root).resolve()
+    # Resolve symlinks so a symlinked component cannot point outside the root.
+    candidate_resolved = Path(candidate).resolve()
+    try:
+        candidate_resolved.relative_to(root_resolved)
+    except ValueError as exc:
+        raise BundlerError(
+            f"Refusing path '{candidate}' — it escapes the allowed root '{root}'."
+        ) from exc
+    return candidate_resolved
+
+
+def load_yaml(path: Path) -> Any:
+    """Parse a YAML file, returning ``{}`` for an empty document."""
+    path = Path(path)
+    if not path.exists():
+        raise BundlerError(f"File not found: {path}")
+    try:
+        with path.open("r", encoding="utf-8") as handle:
+            return yaml.safe_load(handle) or {}
+    except yaml.YAMLError as exc:
+        raise BundlerError(f"Invalid YAML in {path}: {exc}") from exc
+    except OSError as exc:
+        raise BundlerError(f"Could not read {path}: {exc}") from exc
+
+
+def dump_yaml(path: Path, data: Any, *, within: Path | None = None) -> Path:
+    """Write *data* as YAML to *path* (optionally confined to *within*)."""
+    path = Path(path)
+    if within is not None:
+        path = ensure_within(within, path)
+    try:
+        path.parent.mkdir(parents=True, exist_ok=True)
+        with path.open("w", encoding="utf-8") as handle:
+            yaml.safe_dump(data, handle, sort_keys=False, default_flow_style=False)
+    except OSError as exc:
+        raise BundlerError(f"Could not write {path}: {exc}") from exc
+    return path
+
+
+def load_json(path: Path) -> Any:
+    """Parse a JSON file."""
+    path = Path(path)
+    if not path.exists():
+        raise BundlerError(f"File not found: {path}")
+    try:
+        with path.open("r", encoding="utf-8") as handle:
+            return json.load(handle)
+    except json.JSONDecodeError as exc:
+        raise BundlerError(f"Invalid JSON in {path}: {exc}") from exc
+    except OSError as exc:
+        raise BundlerError(f"Could not read {path}: {exc}") from exc
+
+
+def loads_json(text: str, *, origin: str = "<string>") -> Any:
+    """Parse JSON from a string (used for catalog payloads fetched as text)."""
+    try:
+        return json.loads(text)
+    except json.JSONDecodeError as exc:
+        raise BundlerError(f"Invalid JSON from {origin}: {exc}") from exc
+
+
+def dump_json(path: Path, data: Any, *, within: Path | None = None) -> Path:
+    """Write *data* as pretty JSON to *path* (optionally confined to *within*)."""
+    path = Path(path)
+    if within is not None:
+        path = ensure_within(within, path)
+    try:
+        path.parent.mkdir(parents=True, exist_ok=True)
+        with path.open("w", encoding="utf-8") as handle:
+            json.dump(data, handle, indent=2, sort_keys=False)
+            handle.write("\n")
+    except OSError as exc:
+        raise BundlerError(f"Could not write {path}: {exc}") from exc
+    return path
+
+
+def is_safe_relpath(rel: str) -> bool:
+    """Return True if *rel* is a project-relative path with no traversal/absolute parts.
+
+    Platform-independent: a POSIX-absolute path (``/abs``) or a Windows
+    drive-absolute path (``C:\\x``) is rejected on every OS, since these strings
+    can appear in untrusted catalog/manifest data regardless of the host.
+    """
+    if not rel:
+        return False
+    normalized = rel.replace("\\", "/")
+    if os.path.isabs(rel) or normalized.startswith("/"):
+        return False
+    if re.match(r"^[A-Za-z]:", normalized):  # Windows drive-absolute (C:/...)
+        return False
+    parts = PurePosixPath(normalized).parts
+    return ".." not in parts

src/specify_cli/bundler/models/__init__.py

@@ -0,0 +1,2 @@
+"""Bundler data models (manifest, catalog, records)."""
+from __future__ import annotations

src/specify_cli/bundler/models/catalog.py

@@ -0,0 +1,258 @@
+"""Catalog models: source stack (priority + install policy) and catalog entries.
+
+Mirrors ``contracts/bundle-catalog.schema.md``. The stack precedence is
+project > user > built-in; install is permitted only from ``install-allowed``
+sources.
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from enum import Enum
+from pathlib import Path
+from typing import Any
+
+from .. import BundlerError
+from ..lib.yamlio import ensure_within, load_yaml
+
+CONFIG_FILENAME = "bundle-catalogs.yml"
+
+
+class InstallPolicy(str, Enum):
+    INSTALL_ALLOWED = "install-allowed"
+    DISCOVERY_ONLY = "discovery-only"
+
+    @classmethod
+    def parse(cls, value: Any) -> "InstallPolicy":
+        text = str(value or "").strip()
+        for policy in cls:
+            if policy.value == text:
+                return policy
+        raise BundlerError(
+            f"Invalid install_policy '{value}' "
+            f"(must be one of {[p.value for p in cls]})."
+        )
+
+
+class Scope(str, Enum):
+    PROJECT = "project"
+    USER = "user"
+    BUILTIN = "built-in"
+
+
+# Built-in default stack (used when no project/user config overrides it).
+BUILTIN_DEFAULT_STACK: tuple[dict[str, Any], ...] = (
+    {"id": "default", "url": "builtin://default", "priority": 1,
+     "install_policy": InstallPolicy.INSTALL_ALLOWED.value},
+    {"id": "community", "url": "builtin://community", "priority": 2,
+     "install_policy": InstallPolicy.DISCOVERY_ONLY.value},
+)
+
+
+@dataclass(frozen=True)
+class CatalogSource:
+    id: str
+    url: str
+    priority: int
+    install_policy: InstallPolicy
+    scope: Scope = Scope.PROJECT
+
+    @property
+    def install_allowed(self) -> bool:
+        return self.install_policy is InstallPolicy.INSTALL_ALLOWED
+
+    @classmethod
+    def from_dict(cls, data: Any, scope: Scope) -> "CatalogSource":
+        if not isinstance(data, dict):
+            raise BundlerError("Each catalog source must be a mapping.")
+        source_id = str(data.get("id", "")).strip()
+        url = str(data.get("url", "")).strip()
+        if not source_id:
+            raise BundlerError("A catalog source is missing its 'id'.")
+        if not url:
+            raise BundlerError(f"Catalog source '{source_id}' is missing its 'url'.")
+        priority = data.get("priority")
+        if priority is None:
+            raise BundlerError(f"Catalog source '{source_id}' is missing its 'priority'.")
+        if isinstance(priority, bool) or not isinstance(priority, (int, str)):
+            raise BundlerError(
+                f"Catalog source '{source_id}' has a non-integer priority: {priority!r}."
+            )
+        try:
+            priority_int = int(priority)
+        except (TypeError, ValueError):
+            raise BundlerError(
+                f"Catalog source '{source_id}' has a non-integer priority: {priority!r}."
+            ) from None
+        return cls(
+            id=source_id,
+            url=url,
+            priority=priority_int,
+            install_policy=InstallPolicy.parse(data.get("install_policy")),
+            scope=scope,
+        )
+
+    def to_dict(self) -> dict[str, Any]:
+        return {
+            "id": self.id,
+            "url": self.url,
+            "priority": self.priority,
+            "install_policy": self.install_policy.value,
+        }
+
+
+def _parse_tags(value: Any, entry_id: str) -> tuple[str, ...]:
+    """Coerce a catalog entry's ``tags`` into a tuple of strings.
+
+    Catalogs are untrusted input: a bare string would otherwise be iterated
+    character-by-character, so reject anything that is not a list/tuple.
+    """
+    if value is None:
+        return ()
+    if isinstance(value, (str, bytes)) or not isinstance(value, (list, tuple)):
+        raise BundlerError(
+            f"Catalog entry '{entry_id}': 'tags' must be a list of strings."
+        )
+    return tuple(str(t) for t in value)
+
+
+def _parse_verified(value: Any, entry_id: str) -> bool:
+    """Validate a catalog entry's ``verified`` flag is a real boolean.
+
+    ``bool("false")`` is truthy, so coercing arbitrary strings would silently
+    mark untrusted entries as verified; require an actual boolean instead.
+    """
+    if isinstance(value, bool):
+        return value
+    raise BundlerError(
+        f"Catalog entry '{entry_id}': 'verified' must be a boolean (true/false)."
+    )
+
+
+@dataclass(frozen=True)
+class CatalogEntry:
+    id: str
+    name: str
+    version: str
+    role: str
+    description: str
+    author: str
+    license: str
+    download_url: str
+    requires_speckit_version: str
+    provides: dict[str, int] = field(default_factory=dict)
+    repository: str | None = None
+    tags: tuple[str, ...] = ()
+    verified: bool = False
+    # Resolution provenance (filled in by the catalog stack at lookup time):
+    source_id: str | None = None
+    source_policy: InstallPolicy | None = None
+
+    @classmethod
+    def from_dict(cls, data: Any) -> "CatalogEntry":
+        if not isinstance(data, dict):
+            raise BundlerError("Each catalog entry must be a mapping.")
+        entry_id = str(data.get("id", "")).strip()
+        requires = data.get("requires") or {}
+        if not isinstance(requires, dict):
+            raise BundlerError(
+                f"Catalog entry '{entry_id or '<unknown>'}': 'requires' must be a "
+                "mapping when present."
+            )
+        provides_raw = data.get("provides") or {}
+        if not isinstance(provides_raw, dict):
+            raise BundlerError(
+                f"Catalog entry '{entry_id or '<unknown>'}': 'provides' must be a "
+                "mapping when present."
+            )
+        return cls(
+            id=entry_id,
+            name=str(data.get("name", "")).strip(),
+            version=str(data.get("version", "")).strip(),
+            role=str(data.get("role", "")).strip(),
+            description=str(data.get("description", "")).strip(),
+            author=str(data.get("author", "")).strip(),
+            license=str(data.get("license", "")).strip(),
+            download_url=str(data.get("download_url", "")).strip(),
+            requires_speckit_version=str(requires.get("speckit_version", "")).strip(),
+            provides=dict(provides_raw),
+            repository=(str(data["repository"]) if data.get("repository") else None),
+            tags=_parse_tags(data.get("tags"), entry_id),
+            verified=_parse_verified(data.get("verified", False), entry_id),
+        )
+
+    def with_provenance(self, source: CatalogSource) -> "CatalogEntry":
+        return CatalogEntry(
+            id=self.id, name=self.name, version=self.version, role=self.role,
+            description=self.description, author=self.author, license=self.license,
+            download_url=self.download_url,
+            requires_speckit_version=self.requires_speckit_version,
+            provides=self.provides, repository=self.repository, tags=self.tags,
+            verified=self.verified, source_id=source.id,
+            source_policy=source.install_policy,
+        )
+
+
+def load_catalog_payload(data: Any) -> dict[str, CatalogEntry]:
+    """Parse a catalog JSON payload into ``{bundle_id: CatalogEntry}``."""
+    if not isinstance(data, dict):
+        raise BundlerError("Catalog payload must be a JSON object.")
+    bundles_raw = data.get("bundles")
+    if not isinstance(bundles_raw, dict):
+        raise BundlerError("Catalog payload is missing a 'bundles' object.")
+    entries: dict[str, CatalogEntry] = {}
+    for bundle_id, entry_raw in bundles_raw.items():
+        key = str(bundle_id)
+        entry = CatalogEntry.from_dict(entry_raw)
+        # The enclosing key is the authoritative bundle id used by
+        # search/resolve/install. Reject entries whose own ``id`` is missing or
+        # disagrees with the key, so a malformed or malicious catalog can't list
+        # an id that resolves to a different (or no) bundle.
+        if not entry.id:
+            raise BundlerError(
+                f"Catalog entry for '{key}' is missing its 'id' field."
+            )
+        if entry.id != key:
+            raise BundlerError(
+                f"Catalog entry id mismatch: key '{key}' != entry id "
+                f"'{entry.id}'."
+            )
+        entries[key] = entry
+    return entries
+
+
+def load_source_stack(project_root: Path, user_config_dir: Path | None = None) -> list[CatalogSource]:
+    """Build the effective, priority-sorted source stack (project > user > built-in).
+
+    A source id present at a higher-precedence scope overrides the same id at a
+    lower scope. The built-in default stack is always the fallback.
+    """
+    by_id: dict[str, CatalogSource] = {}
+
+    # Lowest precedence first; later writes override earlier ones for the same id.
+    for raw in BUILTIN_DEFAULT_STACK:
+        src = CatalogSource.from_dict(raw, Scope.BUILTIN)
+        by_id[src.id] = src
+
+    if user_config_dir is not None:
+        _merge_config(by_id, Path(user_config_dir) / CONFIG_FILENAME, Scope.USER)
+
+    # Confine the project-scoped read: refuse a symlinked .specify/ that
+    # resolves outside the project root (consistent with other guarded reads).
+    project_config = Path(project_root) / ".specify" / CONFIG_FILENAME
+    if project_config.exists():
+        ensure_within(project_root, project_config)
+    _merge_config(by_id, project_config, Scope.PROJECT)
+
+    return sorted(by_id.values(), key=lambda s: (s.priority, s.id))
+
+
+def _merge_config(by_id: dict[str, CatalogSource], config_path: Path, scope: Scope) -> None:
+    if not config_path.exists():
+        return
+    data = load_yaml(config_path)
+    catalogs = data.get("catalogs") if isinstance(data, dict) else None
+    if not catalogs:
+        return
+    for raw in catalogs:
+        src = CatalogSource.from_dict(raw, scope)
+        by_id[src.id] = src

src/specify_cli/bundler/models/manifest.py

@@ -0,0 +1,263 @@
+"""Bundle manifest model (``bundle.yml``) — parsing and structural normalization.
+
+Mirrors ``contracts/bundle-manifest.schema.md``. Structural validation (shape,
+required fields, enum/semver checks) lives here; *reference* resolution against a
+catalog stack lives in the validator/resolver services.
+"""
+from __future__ import annotations
+
+import re
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Any
+
+from .. import BundlerError
+from ..lib.versioning import is_semver
+from ..lib.yamlio import load_yaml
+
+SUPPORTED_SCHEMA_VERSIONS = {"1.0"}
+PRESET_STRATEGIES = {"replace", "prepend", "append", "wrap"}
+
+COMPONENT_KINDS = ("extensions", "presets", "steps", "workflows")
+
+# A bundle id must be a filesystem-safe slug: it is interpolated into artifact
+# filenames (e.g. ``<id>-<version>.zip``), so path separators or traversal
+# segments must never appear.
+_SAFE_BUNDLE_ID = re.compile(r"^[a-z0-9](?:[a-z0-9._-]*[a-z0-9])?$")
+
+
+@dataclass(frozen=True)
+class ComponentRef:
+    """A pointer to an existing Spec Kit primitive a bundle installs."""
+
+    kind: str  # one of COMPONENT_KINDS (singularized concept), stored plural-of-origin
+    id: str
+    version: str | None = None
+    source: str | None = None
+    priority: int | None = None  # presets only
+    strategy: str | None = None  # presets only
+
+    def label(self) -> str:
+        return f"{self.kind[:-1]}:{self.id}@{self.version or 'unpinned'}"
+
+
+@dataclass(frozen=True)
+class IntegrationRef:
+    id: str
+
+
+@dataclass(frozen=True)
+class Requires:
+    speckit_version: str
+    tools: tuple[str, ...] = ()
+    mcp: tuple[str, ...] = ()
+
+
+@dataclass(frozen=True)
+class BundleMeta:
+    id: str
+    name: str
+    version: str
+    role: str
+    description: str
+    author: str
+    license: str
+
+
+@dataclass
+class BundleManifest:
+    schema_version: str
+    bundle: BundleMeta
+    requires: Requires
+    integration: IntegrationRef | None = None
+    extensions: list[ComponentRef] = field(default_factory=list)
+    presets: list[ComponentRef] = field(default_factory=list)
+    steps: list[ComponentRef] = field(default_factory=list)
+    workflows: list[ComponentRef] = field(default_factory=list)
+    tags: tuple[str, ...] = ()
+    source_path: Path | None = None
+
+    @property
+    def components(self) -> list[ComponentRef]:
+        """All installable component references in deterministic order."""
+        return [*self.extensions, *self.presets, *self.steps, *self.workflows]
+
+    # -- construction ---------------------------------------------------------
+
+    @classmethod
+    def from_file(cls, path: Path) -> "BundleManifest":
+        data = load_yaml(path)
+        manifest = cls.from_dict(data)
+        manifest.source_path = Path(path)
+        return manifest
+
+    @classmethod
+    def from_dict(cls, data: Any) -> "BundleManifest":
+        if not isinstance(data, dict):
+            raise BundlerError("Manifest must be a YAML mapping at the top level.")
+
+        schema_version = str(data.get("schema_version", "")).strip()
+
+        bundle_raw = data.get("bundle")
+        if not isinstance(bundle_raw, dict):
+            raise BundlerError("Manifest is missing the required 'bundle' mapping.")
+        meta = BundleMeta(
+            id=str(bundle_raw.get("id", "")).strip(),
+            name=str(bundle_raw.get("name", "")).strip(),
+            version=str(bundle_raw.get("version", "")).strip(),
+            role=str(bundle_raw.get("role", "")).strip(),
+            description=str(bundle_raw.get("description", "")).strip(),
+            author=str(bundle_raw.get("author", "")).strip(),
+            license=str(bundle_raw.get("license", "")).strip(),
+        )
+
+        requires_raw = data.get("requires") or {}
+        if not isinstance(requires_raw, dict):
+            raise BundlerError("'requires' must be a mapping when present.")
+        requires = Requires(
+            speckit_version=str(requires_raw.get("speckit_version", "")).strip(),
+            tools=_parse_str_list(requires_raw.get("tools"), "requires.tools"),
+            mcp=_parse_str_list(requires_raw.get("mcp"), "requires.mcp"),
+        )
+
+        integration = None
+        integration_raw = data.get("integration")
+        if isinstance(integration_raw, dict) and integration_raw.get("id"):
+            integration = IntegrationRef(id=str(integration_raw["id"]).strip())
+
+        provides = data.get("provides") or {}
+        if not isinstance(provides, dict):
+            raise BundlerError("'provides' must be a mapping when present.")
+
+        tags_raw = data.get("tags")
+        if tags_raw is None:
+            tags_raw = []
+        else:
+            tags_raw = _parse_str_list(tags_raw, "tags")
+
+        manifest = cls(
+            schema_version=schema_version,
+            bundle=meta,
+            requires=requires,
+            integration=integration,
+            extensions=_parse_refs("extensions", provides.get("extensions")),
+            presets=_parse_refs("presets", provides.get("presets")),
+            steps=_parse_refs("steps", provides.get("steps")),
+            workflows=_parse_refs("workflows", provides.get("workflows")),
+            tags=tuple(str(t) for t in tags_raw),
+        )
+        return manifest
+
+    # -- structural validation ------------------------------------------------
+
+    def structural_errors(self) -> list[str]:
+        """Return a list of human-readable structural problems (empty == valid)."""
+        errors: list[str] = []
+
+        if self.schema_version not in SUPPORTED_SCHEMA_VERSIONS:
+            errors.append(
+                f"schema_version '{self.schema_version or '<missing>'}' is not supported "
+                f"(supported: {sorted(SUPPORTED_SCHEMA_VERSIONS)})."
+            )
+
+        required = {
+            "bundle.id": self.bundle.id,
+            "bundle.name": self.bundle.name,
+            "bundle.version": self.bundle.version,
+            "bundle.role": self.bundle.role,
+            "bundle.description": self.bundle.description,
+            "bundle.author": self.bundle.author,
+            "bundle.license": self.bundle.license,
+            "requires.speckit_version": self.requires.speckit_version,
+        }
+        for field_path, value in required.items():
+            if not value:
+                errors.append(f"Missing required field: {field_path}.")
+
+        if self.bundle.version and not is_semver(self.bundle.version):
+            errors.append(f"bundle.version '{self.bundle.version}' is not valid semver.")
+
+        if self.bundle.id and not _SAFE_BUNDLE_ID.match(self.bundle.id):
+            errors.append(
+                f"bundle.id '{self.bundle.id}' must be a slug "
+                "(lowercase letters, digits, '.', '_', '-'; no path separators)."
+            )
+
+        for ref in self.components:
+            if not ref.id:
+                errors.append(f"A {ref.kind[:-1]} entry is missing its 'id'.")
+            if ref.kind != "steps" and not ref.version:
+                errors.append(
+                    f"{ref.kind[:-1]} '{ref.id or '<unknown>'}' must be pinned to a 'version'."
+                )
+            if ref.version and not is_semver(ref.version):
+                errors.append(
+                    f"{ref.kind[:-1]} '{ref.id}' has invalid version '{ref.version}'."
+                )
+
+        for ref in self.presets:
+            if ref.priority is None:
+                errors.append(f"preset '{ref.id}' must declare an integer 'priority'.")
+            if ref.strategy is None or ref.strategy not in PRESET_STRATEGIES:
+                errors.append(
+                    f"preset '{ref.id}' has invalid strategy '{ref.strategy}' "
+                    f"(must be one of {sorted(PRESET_STRATEGIES)})."
+                )
+
+        return errors
+
+    def is_agnostic(self) -> bool:
+        """True when the bundle declares no integration (inherits the active one)."""
+        return self.integration is None
+
+
+def _parse_str_list(raw: Any, field_name: str) -> tuple[str, ...]:
+    """Coerce a manifest list-of-strings field into a tuple of strings.
+
+    Rejects a bare string/bytes (which would otherwise be iterated
+    character-by-character) and any non-list/tuple, matching the manifest
+    contract (``string[]``).
+    """
+    if raw is None:
+        return ()
+    if isinstance(raw, (str, bytes)) or not isinstance(raw, (list, tuple)):
+        raise BundlerError(f"'{field_name}' must be a list of strings when present.")
+    return tuple(str(item) for item in raw)
+
+
+def _parse_refs(kind: str, raw: Any) -> list[ComponentRef]:
+    if raw is None:
+        return []
+    if not isinstance(raw, list):
+        raise BundlerError(f"provides.{kind} must be a list when present.")
+    refs: list[ComponentRef] = []
+    for item in raw:
+        if not isinstance(item, dict):
+            raise BundlerError(f"Each provides.{kind} entry must be a mapping.")
+        priority = _parse_priority(kind, item.get("priority"))
+        refs.append(
+            ComponentRef(
+                kind=kind,
+                id=str(item.get("id", "")).strip(),
+                version=(str(item["version"]).strip() if item.get("version") else None),
+                source=(str(item["source"]).strip() if item.get("source") else None),
+                priority=priority,
+                strategy=(str(item["strategy"]).strip() if item.get("strategy") else None),
+            )
+        )
+    return refs
+
+
+def _parse_priority(kind: str, raw: Any) -> int | None:
+    if raw is None:
+        return None
+    if isinstance(raw, bool) or not isinstance(raw, (int, str)):
+        raise BundlerError(
+            f"provides.{kind} priority must be an integer, got {raw!r}."
+        )
+    try:
+        return int(raw)
+    except (TypeError, ValueError):
+        raise BundlerError(
+            f"provides.{kind} priority must be an integer, got {raw!r}."
+        ) from None

src/specify_cli/bundler/models/records.py

@@ -0,0 +1,229 @@
+"""Installed-bundle records — provenance for precise list/remove/update.
+
+Records are stored as JSON at ``.specify/bundle-records.json``. Each record
+captures exactly which components a bundle contributed so removal touches only
+that bundle's components and never collateral (FR-022, SC-004).
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any
+
+from .. import BundlerError
+from ..lib.yamlio import dump_json, ensure_within, load_json
+from .manifest import COMPONENT_KINDS, ComponentRef
+
+RECORDS_FILENAME = "bundle-records.json"
+RECORDS_SCHEMA_VERSION = "1.0"
+
+
+@dataclass(frozen=True)
+class InstalledBundleRecord:
+    bundle_id: str
+    version: str
+    contributed_components: tuple[ComponentRef, ...]
+    installed_at: str
+
+    @classmethod
+    def create(
+        cls,
+        bundle_id: str,
+        version: str,
+        components: list[ComponentRef],
+        installed_at: str | None = None,
+    ) -> "InstalledBundleRecord":
+        return cls(
+            bundle_id=bundle_id,
+            version=version,
+            contributed_components=tuple(components),
+            installed_at=installed_at or _utc_now(),
+        )
+
+    def to_dict(self) -> dict[str, Any]:
+        return {
+            "bundle_id": self.bundle_id,
+            "version": self.version,
+            "installed_at": self.installed_at,
+            "contributed_components": [
+                _component_to_dict(c) for c in self.contributed_components
+            ],
+        }
+
+    @classmethod
+    def from_dict(cls, data: Any) -> "InstalledBundleRecord":
+        if not isinstance(data, dict):
+            raise BundlerError("Each installed-bundle record must be a mapping.")
+        components_raw = data.get("contributed_components") or []
+        if not isinstance(components_raw, list):
+            raise BundlerError(
+                "Corrupt record: 'contributed_components' must be a list."
+            )
+        bundle_id = str(data.get("bundle_id", "")).strip()
+        version = str(data.get("version", "")).strip()
+        if not bundle_id:
+            raise BundlerError(
+                "Corrupt records file: an installed-bundle record is missing "
+                "its 'bundle_id'."
+            )
+        if not version:
+            raise BundlerError(
+                f"Corrupt records file: record for bundle '{bundle_id}' is "
+                "missing its 'version'."
+            )
+        return cls(
+            bundle_id=bundle_id,
+            version=version,
+            installed_at=str(data.get("installed_at", "")).strip(),
+            contributed_components=tuple(
+                _component_from_dict(c) for c in components_raw
+            ),
+        )
+
+
+def records_path(project_root: Path) -> Path:
+    return Path(project_root) / ".specify" / RECORDS_FILENAME
+
+
+def _check_schema_version(value: Any, *, path: Path, required: bool) -> None:
+    """Reject a records file whose schema version we cannot safely parse.
+
+    A future incompatible format (or a corrupted file) must fail fast with an
+    actionable error rather than being silently mis-parsed, which could lead to
+    incorrect bundle attribution or removal. Forward-compatible minor bumps that
+    keep the same major version are accepted.
+    """
+    if value is None:
+        if required:
+            raise BundlerError(
+                f"Corrupt records file: {path} — missing 'schema_version'. "
+                f"Expected version {RECORDS_SCHEMA_VERSION}."
+            )
+        return
+    seen = str(value).strip()
+    if seen.split(".")[0] != RECORDS_SCHEMA_VERSION.split(".")[0]:
+        raise BundlerError(
+            f"Unsupported records schema version '{seen}' at {path}; this "
+            f"Spec Kit understands version {RECORDS_SCHEMA_VERSION}. The file may "
+            "have been written by a newer version or is corrupt."
+        )
+
+
+def load_records(project_root: Path) -> list[InstalledBundleRecord]:
+    # Defense in depth (mirrors the write path's within= confinement): refuse to
+    # read through a symlinked or traversal-escaping ``.specify`` that resolves
+    # outside project_root.
+    path = ensure_within(project_root, records_path(project_root))
+    if not path.exists():
+        return []
+    data = load_json(path)
+    if not isinstance(data, dict):
+        raise BundlerError(f"Corrupt records file: {path}")
+    _check_schema_version(data.get("schema_version"), path=path, required=True)
+    bundles = data.get("bundles") or []
+    if not isinstance(bundles, list):
+        raise BundlerError(
+            f"Corrupt records file: {path} — 'bundles' must be a list."
+        )
+    return [InstalledBundleRecord.from_dict(item) for item in bundles]
+
+
+def save_records(project_root: Path, records: list[InstalledBundleRecord]) -> None:
+    payload = {
+        "schema_version": RECORDS_SCHEMA_VERSION,
+        "updated_at": _utc_now(),
+        "bundles": [r.to_dict() for r in records],
+    }
+    dump_json(records_path(project_root), payload, within=project_root)
+
+
+def find_record(
+    records: list[InstalledBundleRecord], bundle_id: str
+) -> InstalledBundleRecord | None:
+    for record in records:
+        if record.bundle_id == bundle_id:
+            return record
+    return None
+
+
+def upsert_record(
+    records: list[InstalledBundleRecord], record: InstalledBundleRecord
+) -> list[InstalledBundleRecord]:
+    """Return a new list with *record* replacing any same-id record (append otherwise)."""
+    updated = [r for r in records if r.bundle_id != record.bundle_id]
+    updated.append(record)
+    return updated
+
+
+def remove_record(
+    records: list[InstalledBundleRecord], bundle_id: str
+) -> list[InstalledBundleRecord]:
+    return [r for r in records if r.bundle_id != bundle_id]
+
+
+def components_still_needed(
+    records: list[InstalledBundleRecord], exclude_bundle_id: str
+) -> set[tuple[str, str]]:
+    """Set of ``(kind, id)`` component keys required by bundles other than the excluded one."""
+    needed: set[tuple[str, str]] = set()
+    for record in records:
+        if record.bundle_id == exclude_bundle_id:
+            continue
+        for component in record.contributed_components:
+            needed.add((component.kind, component.id))
+    return needed
+
+
+def _component_to_dict(ref: ComponentRef) -> dict[str, Any]:
+    data: dict[str, Any] = {"kind": ref.kind, "id": ref.id}
+    if ref.version is not None:
+        data["version"] = ref.version
+    if ref.source is not None:
+        data["source"] = ref.source
+    if ref.priority is not None:
+        data["priority"] = ref.priority
+    if ref.strategy is not None:
+        data["strategy"] = ref.strategy
+    return data
+
+
+def _component_from_dict(data: Any) -> ComponentRef:
+    if not isinstance(data, dict):
+        raise BundlerError("Each contributed component must be a mapping.")
+    kind = str(data.get("kind", "")).strip()
+    cid = str(data.get("id", "")).strip()
+    if kind not in COMPONENT_KINDS:
+        raise BundlerError(
+            f"Corrupt records file: component 'kind' must be one of "
+            f"{list(COMPONENT_KINDS)}, got {kind or '<missing>'!r}."
+        )
+    if not cid:
+        raise BundlerError(
+            "Corrupt records file: a contributed component is missing its 'id'."
+        )
+    return ComponentRef(
+        kind=kind,
+        id=cid,
+        version=(str(data["version"]) if data.get("version") else None),
+        source=(str(data["source"]) if data.get("source") else None),
+        priority=_parse_priority(data.get("priority")),
+        strategy=(str(data["strategy"]) if data.get("strategy") else None),
+    )
+
+
+def _parse_priority(raw: Any) -> int | None:
+    if raw is None:
+        return None
+    if isinstance(raw, bool) or not isinstance(raw, (int, str)):
+        raise BundlerError(f"Component priority must be an integer, got {raw!r}.")
+    try:
+        return int(raw)
+    except (TypeError, ValueError):
+        raise BundlerError(
+            f"Component priority must be an integer, got {raw!r}."
+        ) from None
+
+
+def _utc_now() -> str:
+    return datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")

src/specify_cli/bundler/services/__init__.py

@@ -0,0 +1,2 @@
+"""Bundler services (catalog stack, resolver, installer, conflict, validator, packager)."""
+from __future__ import annotations

src/specify_cli/bundler/services/adapters.py

@@ -0,0 +1,193 @@
+"""Concrete adapters: catalog fetching and primitive installation.
+
+These wire the bundler's injectable seams to the real environment:
+
+* :func:`make_catalog_fetcher` returns an offline-first fetcher that reads
+  built-in catalogs and local/pinned file URLs without network, and falls back
+  to a timeout-bounded HTTP GET only for ``http(s)://`` sources.
+* :class:`DefaultPrimitiveInstaller` dispatches component install/remove to the
+  existing Spec Kit primitive machinery in-process.
+"""
+from __future__ import annotations
+
+import re
+from pathlib import Path
+from urllib.parse import ParseResult, urlparse
+from urllib.request import url2pathname
+
+from .. import BundlerError
+from ..lib.yamlio import loads_json
+from ..models.catalog import CatalogSource
+from ..models.manifest import ComponentRef
+
+# Built-in catalog payloads ship empty by default; a host distribution can
+# replace these with curated content. Keeping them here makes ``search``/``info``
+# work fully offline against the default stack.
+_BUILTIN_CATALOGS: dict[str, dict] = {
+    "builtin://default": {
+        "schema_version": "1.0",
+        "catalog_url": "builtin://default",
+        "bundles": {},
+    },
+    "builtin://community": {
+        "schema_version": "1.0",
+        "catalog_url": "builtin://community",
+        "bundles": {},
+    },
+}
+
+HTTP_TIMEOUT_SECONDS = 10
+
+# Windows absolute paths like ``C:\catalog.json`` parse with a single-letter
+# ``scheme`` under urlparse; treat them as local files rather than URLs.
+_WINDOWS_DRIVE_RE = re.compile(r"^[A-Za-z]:[\\/]")
+
+
+def _is_windows_drive_path(url: str) -> bool:
+    return bool(_WINDOWS_DRIVE_RE.match(url))
+
+
+def _file_url_to_path(parsed: ParseResult) -> Path:
+    """Convert a ``file://`` URL to a local path.
+
+    Uses ``url2pathname`` for percent-decoding and OS-correct separators, and
+    preserves ``netloc`` so UNC paths (``file://server/share``) and Windows
+    drive URLs (``file:///C:/x``) resolve correctly instead of dropping host
+    or producing ``/C:/x``.
+    """
+    netloc = parsed.netloc
+    if netloc and netloc.lower() != "localhost":
+        # UNC share: file://server/share/... -> \\server\share\...
+        return Path(url2pathname(f"//{netloc}{parsed.path}"))
+    return Path(url2pathname(parsed.path))
+
+
+def _validate_remote_url(source_id: str, url: str) -> None:
+    """Restrict remote catalogs to HTTPS (HTTP only for localhost) with a host.
+
+    Mirrors ``specify_cli.catalogs`` URL validation to avoid MITM/downgrade
+    issues before any network call.
+    """
+    parsed = urlparse(url)
+    is_localhost = parsed.hostname in ("localhost", "127.0.0.1", "::1")
+    if parsed.scheme != "https" and not (parsed.scheme == "http" and is_localhost):
+        raise BundlerError(
+            f"Catalog '{source_id}' URL must use HTTPS (got {parsed.scheme}://). "
+            "HTTP is only allowed for localhost."
+        )
+    if not parsed.netloc:
+        raise BundlerError(
+            f"Catalog '{source_id}' URL must be a valid URL with a host: {url}"
+        )
+
+
+def make_catalog_fetcher(*, allow_network: bool = True):
+    """Return a fetcher callable suitable for :class:`CatalogStack`.
+
+    When *allow_network* is False, ``http(s)://`` sources raise instead of
+    touching the network (used by offline tests and ``--offline`` flows).
+    """
+
+    def fetch(source: CatalogSource) -> dict:
+        url = source.url
+        parsed = urlparse(url)
+        scheme = parsed.scheme.lower()
+
+        if scheme == "builtin":
+            payload = _BUILTIN_CATALOGS.get(url)
+            if payload is None:
+                raise BundlerError(f"Unknown built-in catalog '{url}'.")
+            return payload
+
+        if scheme == "file":
+            path = _file_url_to_path(parsed)
+            if not path.exists():
+                raise BundlerError(f"Catalog file not found: {path}")
+            return loads_json(path.read_text(encoding="utf-8"), origin=str(path))
+
+        if scheme == "" or _is_windows_drive_path(url):
+            path = Path(url)
+            if not path.exists():
+                raise BundlerError(f"Catalog file not found: {path}")
+            return loads_json(path.read_text(encoding="utf-8"), origin=str(path))
+
+        if scheme in ("http", "https"):
+            if not allow_network:
+                raise BundlerError(
+                    f"Network access disabled; cannot fetch catalog '{source.id}' "
+                    f"from {url}."
+                )
+            _validate_remote_url(source.id, url)
+            return _http_get_json(source.id, url)
+
+        raise BundlerError(f"Unsupported catalog URL scheme: {url}")
+
+    return fetch
+
+
+def _http_get_json(source_id: str, url: str) -> dict:
+    """Fetch catalog JSON over HTTP(S) via the shared authenticated client.
+
+    Routing through :func:`specify_cli.authentication.http.open_url` gives
+    ``auth.json`` token support and strips the ``Authorization`` header when a
+    redirect leaves the entry's trusted hosts or downgrades the scheme. We also
+    reject any redirect that leaves HTTPS (the ``redirect_validator`` runs
+    *before* each hop) and re-validate the final URL after redirects, so the
+    HTTPS/host guarantee from ``_validate_remote_url`` is preserved end to end
+    rather than only on the initial URL.
+    """
+    from ...authentication.http import open_url
+
+    def _validate_redirect(_old_url: str, new_url: str) -> None:
+        _validate_remote_url(source_id, new_url)
+
+    try:
+        with open_url(
+            url,
+            timeout=HTTP_TIMEOUT_SECONDS,
+            redirect_validator=_validate_redirect,
+        ) as response:
+            final_url = response.geturl()
+            _validate_remote_url(source_id, final_url)
+            raw = response.read().decode("utf-8")
+    except BundlerError:
+        raise
+    except Exception as exc:  # noqa: BLE001
+        raise BundlerError(f"Failed to fetch catalog from {url}: {exc}") from exc
+    return loads_json(raw, origin=final_url)
+
+
+class DefaultPrimitiveInstaller:
+    """Dispatch component install/remove to existing primitive machinery.
+
+    This adapter is intentionally thin: it owns no install logic of its own,
+    delegating entirely to the per-primitive managers so the bundler honours
+    Principle I (no duplicated primitive logic).
+
+    *allow_network* mirrors the bundle command's ``--offline`` flag: when False,
+    component kinds that can only be sourced from a remote catalog refuse rather
+    than touching the network. Bundled presets/extensions still install offline.
+    """
+
+    def __init__(self, *, allow_network: bool = True) -> None:
+        self._allow_network = allow_network
+
+    def is_installed(self, project_root: Path, component: ComponentRef) -> bool:
+        manager = self._manager_for(component, project_root)
+        return manager.is_installed(component)
+
+    def install(self, project_root: Path, component: ComponentRef) -> None:
+        manager = self._manager_for(component, project_root)
+        manager.install(component)
+
+    def remove(self, project_root: Path, component: ComponentRef) -> None:
+        manager = self._manager_for(component, project_root)
+        manager.remove(component)
+
+    def _manager_for(self, component: ComponentRef, project_root: Path):
+        # Lazy import to avoid import cycles and keep startup cheap (Principle IV).
+        from .primitives import primitive_manager
+
+        return primitive_manager(
+            component.kind, project_root, allow_network=self._allow_network
+        )

src/specify_cli/bundler/services/catalog_stack.py

@@ -0,0 +1,114 @@
+"""Catalog stack: aggregate bundle entries across sources with precedence + policy.
+
+Loads each source's catalog payload (via an injectable fetcher so tests stay
+offline), then resolves a bundle id to the highest-precedence entry while
+recording whether installation is permitted by that source's policy.
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Callable
+
+from .. import BundlerError
+from ..models.catalog import (
+    CatalogEntry,
+    CatalogSource,
+    load_catalog_payload,
+    load_source_stack,
+)
+
+# A fetcher returns the raw JSON payload (a dict) for a given source.
+CatalogFetcher = Callable[[CatalogSource], dict]
+
+
+@dataclass
+class ResolvedBundle:
+    entry: CatalogEntry
+    source: CatalogSource
+
+    @property
+    def install_allowed(self) -> bool:
+        return self.source.install_allowed
+
+
+class CatalogStack:
+    def __init__(
+        self,
+        sources: list[CatalogSource],
+        fetcher: CatalogFetcher,
+    ) -> None:
+        # Highest precedence (lowest priority number) first.
+        self._sources = sorted(sources, key=lambda s: (s.priority, s.id))
+        self._fetcher = fetcher
+        self._payloads: dict[str, dict[str, CatalogEntry]] = {}
+
+    @classmethod
+    def load(
+        cls,
+        project_root: Path,
+        fetcher: CatalogFetcher,
+        user_config_dir: Path | None = None,
+    ) -> "CatalogStack":
+        sources = load_source_stack(project_root, user_config_dir)
+        return cls(sources, fetcher)
+
+    @property
+    def sources(self) -> list[CatalogSource]:
+        return list(self._sources)
+
+    def _entries_for(self, source: CatalogSource) -> dict[str, CatalogEntry]:
+        if source.id not in self._payloads:
+            try:
+                raw = self._fetcher(source)
+            except BundlerError:
+                raise
+            except Exception as exc:  # noqa: BLE001 - surface as chained BundlerError
+                raise BundlerError(
+                    f"Failed to load catalog '{source.id}' ({source.url}): {exc}"
+                ) from exc
+            self._payloads[source.id] = load_catalog_payload(raw)
+        return self._payloads[source.id]
+
+    def resolve(self, bundle_id: str) -> ResolvedBundle:
+        """Return the highest-precedence entry for *bundle_id* or raise."""
+        for source in self._sources:
+            entries = self._entries_for(source)
+            entry = entries.get(bundle_id)
+            if entry is not None:
+                return ResolvedBundle(entry=entry.with_provenance(source), source=source)
+        raise BundlerError(
+            f"Bundle '{bundle_id}' was not found in any configured catalog."
+        )
+
+    def search(self, query: str = "") -> list[ResolvedBundle]:
+        """Return entries matching *query* (substring over id/name/role/tags/description).
+
+        Each bundle id appears once, resolved at its highest-precedence source.
+        Results are sorted by bundle id for deterministic output.
+        """
+        needle = query.strip().lower()
+        seen: dict[str, ResolvedBundle] = {}
+        for source in self._sources:
+            for bundle_id, entry in self._entries_for(source).items():
+                if bundle_id in seen:
+                    continue
+                if needle and not _matches(entry, needle):
+                    continue
+                seen[bundle_id] = ResolvedBundle(
+                    entry=entry.with_provenance(source), source=source
+                )
+        return [seen[k] for k in sorted(seen)]
+
+
+def _matches(entry: CatalogEntry, needle: str) -> bool:
+    haystack = " ".join(
+        [
+            entry.id,
+            entry.name,
+            entry.role,
+            entry.description,
+            " ".join(entry.tags),
+        ]
+    ).lower()
+    return needle in haystack

src/specify_cli/bundler/services/conflict.py

@@ -0,0 +1,54 @@
+"""Conflict detection across the installed-bundle stack.
+
+The single cross-bundle conflict point is the active integration (FR-019).
+Component-level overlaps (same preset id at different priorities, etc.) are
+resolved by the existing primitive machinery's own precedence rules, so the
+bundler only needs to guard the integration invariant and surface informational
+overlaps.
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+
+from ..models.manifest import BundleManifest
+from ..models.records import InstalledBundleRecord
+
+
+@dataclass
+class ConflictReport:
+    integration_clash: str | None = None  # message when a hard clash exists
+    overlaps: list[str] = field(default_factory=list)  # components already provided
+
+    @property
+    def has_blocking_conflict(self) -> bool:
+        return self.integration_clash is not None
+
+
+def detect_conflicts(
+    manifest: BundleManifest,
+    active_integration: str | None,
+    installed: list[InstalledBundleRecord],
+) -> ConflictReport:
+    report = ConflictReport()
+
+    if manifest.integration is not None and active_integration:
+        if manifest.integration.id != active_integration:
+            report.integration_clash = (
+                f"Bundle targets integration '{manifest.integration.id}' but the "
+                f"project's active integration is '{active_integration}'."
+            )
+
+    already: dict[tuple[str, str], str] = {}
+    for record in installed:
+        for component in record.contributed_components:
+            already[(component.kind, component.id)] = record.bundle_id
+
+    for component in manifest.components:
+        owner = already.get((component.kind, component.id))
+        if owner and owner != manifest.bundle.id:
+            report.overlaps.append(
+                f"{component.kind[:-1]} '{component.id}' is already provided by "
+                f"bundle '{owner}'."
+            )
+
+    return report

src/specify_cli/bundler/services/installer.py

@@ -0,0 +1,210 @@
+"""Installer: apply an :class:`InstallPlan` via existing primitive machinery.
+
+The actual component installation (extensions, presets, steps, workflows) is
+delegated to a :class:`PrimitiveInstaller` so the bundler never re-implements
+primitive logic (Principle I) and integration tests can inject a deterministic,
+offline fake (Principle II/IV). The real adapter dispatches in-process to the
+existing extension/preset/step/workflow machinery.
+
+Installation is idempotent and stops on first failure with no partial record
+write (FR-018, SC partial-failure-stop).
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from pathlib import Path
+from typing import Protocol
+
+from .. import BundlerError
+from ..models.manifest import BundleManifest, ComponentRef
+from ..models.records import (
+    InstalledBundleRecord,
+    components_still_needed,
+    find_record,
+    load_records,
+    remove_record,
+    save_records,
+    upsert_record,
+)
+from .conflict import detect_conflicts
+from .resolver import InstallPlan
+
+
+class PrimitiveInstaller(Protocol):
+    """Adapter over the existing Spec Kit primitive install/remove machinery."""
+
+    def is_installed(self, project_root: Path, component: ComponentRef) -> bool: ...
+
+    def install(self, project_root: Path, component: ComponentRef) -> None: ...
+
+    def remove(self, project_root: Path, component: ComponentRef) -> None: ...
+
+
+@dataclass
+class InstallResult:
+    bundle_id: str
+    installed: list[ComponentRef] = field(default_factory=list)
+    skipped: list[ComponentRef] = field(default_factory=list)
+    refreshed: list[ComponentRef] = field(default_factory=list)
+    uninstalled: list[ComponentRef] = field(default_factory=list)
+
+    @property
+    def changed(self) -> bool:
+        return bool(self.installed or self.refreshed)
+
+
+def install_bundle(
+    project_root: Path,
+    plan: InstallPlan,
+    installer: PrimitiveInstaller,
+    manifest: BundleManifest | None = None,
+    refresh: bool = False,
+) -> InstallResult:
+    """Execute *plan*, recording provenance. Idempotent, with bounded rollback.
+
+    Atomicity is scoped, not global: on failure only the components newly
+    installed during *this* call are rolled back, and the provenance record is
+    written solely on full success (a failure records nothing). Components that
+    were already installed beforehand — including those re-applied when *refresh*
+    is True — are never rolled back.
+
+    When *refresh* is True (used by ``specify bundle update``), components that
+    are already installed are re-applied through the primitive machinery so they
+    are brought up to the plan's pinned versions, rather than skipped. Primitive
+    config (e.g. preset priority overrides) is preserved by the underlying
+    machinery.
+
+    Version-pin enforcement is install-time only. The primitive ``is_installed``
+    checks are id-based (they do not compare versions), so when a component is
+    already present and *refresh* is False it is skipped without verifying that
+    the on-disk version matches the manifest pin. Pins are therefore only
+    guaranteed to be applied when the bundler actually performs an install or a
+    refresh; running ``specify bundle update`` re-applies every owned component
+    at its pinned version.
+    """
+    records = load_records(project_root)
+
+    if manifest is not None:
+        report = detect_conflicts(manifest, plan.effective_integration, records)
+        if report.has_blocking_conflict:
+            raise BundlerError(report.integration_clash)
+
+    result = InstallResult(bundle_id=plan.bundle_id)
+    existing = find_record(records, plan.bundle_id)
+    prior_ours = {
+        (c.kind, c.id) for c in existing.contributed_components
+    } if existing is not None else set()
+    # Components already attributed to a *different* installed bundle: these are
+    # legitimately shareable (refcounted on removal), so this bundle may also
+    # claim them. A component that is installed on disk but tracked by no bundle
+    # was installed independently and must NOT be attributed here — otherwise
+    # removing this bundle would uninstall it (collateral removal, FR-022).
+    other_tracked = {
+        (c.kind, c.id)
+        for r in records
+        if r.bundle_id != plan.bundle_id
+        for c in r.contributed_components
+    }
+
+    contributed: list[ComponentRef] = []
+    done: list[ComponentRef] = []
+    try:
+        for component in plan.components:
+            key = (component.kind, component.id)
+            if installer.is_installed(project_root, component):
+                # A component is "ours" only when this bundle (or a sibling
+                # bundle) already owns it. Independently-installed components
+                # are never attributed and — crucially — never refreshed, so
+                # ``bundle update`` cannot make collateral changes to things it
+                # does not own (FR-022).
+                owned = key in prior_ours or key in other_tracked
+                if refresh and owned:
+                    _refresh_component(project_root, installer, component)
+                    result.refreshed.append(component)
+                else:
+                    result.skipped.append(component)
+                if owned:
+                    contributed.append(component)
+                continue
+            installer.install(project_root, component)
+            done.append(component)
+            result.installed.append(component)
+            contributed.append(component)
+    except BundlerError:
+        _rollback(project_root, installer, done)
+        raise
+    except Exception as exc:  # noqa: BLE001
+        _rollback(project_root, installer, done)
+        raise BundlerError(
+            f"Failed to install bundle '{plan.bundle_id}': {exc}. "
+            "No changes were recorded."
+        ) from exc
+
+    record = InstalledBundleRecord.create(
+        bundle_id=plan.bundle_id,
+        version=plan.version,
+        components=contributed,
+        # Preserve the original install time across refresh/update so
+        # ``bundle list`` keeps reporting when the bundle was first installed.
+        installed_at=existing.installed_at if existing is not None else None,
+    )
+    save_records(project_root, upsert_record(records, record))
+    return result
+
+
+def remove_bundle(
+    project_root: Path,
+    bundle_id: str,
+    installer: PrimitiveInstaller,
+) -> InstallResult:
+    """Remove a bundle, uninstalling only components no other bundle still needs."""
+    records = load_records(project_root)
+    target = next((r for r in records if r.bundle_id == bundle_id), None)
+    if target is None:
+        raise BundlerError(f"Bundle '{bundle_id}' is not installed.")
+
+    still_needed = components_still_needed(records, exclude_bundle_id=bundle_id)
+    result = InstallResult(bundle_id=bundle_id)
+
+    for component in target.contributed_components:
+        key = (component.kind, component.id)
+        if key in still_needed:
+            result.skipped.append(component)
+            continue
+        if installer.is_installed(project_root, component):
+            installer.remove(project_root, component)
+            result.uninstalled.append(component)
+        else:
+            result.skipped.append(component)
+
+    save_records(project_root, remove_record(records, bundle_id))
+    return result
+
+
+def _refresh_component(
+    project_root: Path,
+    installer: PrimitiveInstaller,
+    component: ComponentRef,
+) -> None:
+    """Re-apply an already-installed component to bring it up to its pinned version.
+
+    Prefers a primitive-provided ``refresh`` hook when available; otherwise falls
+    back to a re-install through the existing idempotent install path.
+    """
+    op = getattr(installer, "refresh", None)
+    if callable(op):
+        op(project_root, component)
+    else:
+        installer.install(project_root, component)
+
+
+def _rollback(
+    project_root: Path,
+    installer: PrimitiveInstaller,
+    done: list[ComponentRef],
+) -> None:
+    for component in reversed(done):
+        try:
+            installer.remove(project_root, component)
+        except Exception:  # noqa: BLE001 - best-effort rollback
+            continue

src/specify_cli/bundler/services/packager.py

@@ -0,0 +1,145 @@
+"""Packager: produce a single versioned distributable artifact from a bundle dir.
+
+``specify bundle build`` zips the manifest, README, and any local assets into
+``<id>-<version>.zip``. Build refuses on an invalid manifest, pointing the
+author to ``validate``. All file reads are confined within the bundle source
+directory (Principle V path confinement).
+"""
+from __future__ import annotations
+
+import os
+import re
+import zipfile
+from dataclasses import dataclass
+from pathlib import Path
+
+from .. import BundlerError
+from ..lib.yamlio import ensure_within
+from ..models.manifest import BundleManifest
+from .validator import validate_manifest
+
+# Files/dirs never included in an artifact.
+EXCLUDE_NAMES = {".git", "__pycache__", ".DS_Store"}
+
+# Fixed member timestamp (zip epoch) for reproducible, byte-stable artifacts.
+_FIXED_TIMESTAMP = (1980, 1, 1, 0, 0, 0)
+
+
+@dataclass
+class BuildResult:
+    artifact_path: Path
+    file_count: int
+
+
+def build_bundle(
+    bundle_dir: Path,
+    output_dir: Path | None = None,
+) -> BuildResult:
+    bundle_dir = Path(bundle_dir).resolve()
+    manifest_path = bundle_dir / "bundle.yml"
+    if not manifest_path.exists():
+        raise BundlerError(f"No bundle.yml found in '{bundle_dir}'.")
+
+    # The artifact contract requires a human-facing README.md alongside the
+    # manifest; refuse early rather than publish a bundle with no description.
+    if not (bundle_dir / "README.md").exists():
+        raise BundlerError(
+            f"No README.md found in '{bundle_dir}'. Every bundle must ship a "
+            "README.md describing it."
+        )
+
+    manifest = BundleManifest.from_file(manifest_path)
+    report = validate_manifest(manifest)
+    if not report.ok:
+        raise BundlerError(
+            "Refusing to build an invalid manifest. Run 'specify bundle validate' "
+            "and fix:\n  - " + "\n  - ".join(report.errors)
+        )
+
+    out_dir = Path(output_dir).resolve() if output_dir else bundle_dir
+    out_dir.mkdir(parents=True, exist_ok=True)
+    artifact_name = f"{manifest.bundle.id}-{manifest.bundle.version}.zip"
+    artifact_path = out_dir / artifact_name
+    # Defense in depth: even though validate_manifest() rejects unsafe ids, make
+    # sure a crafted id cannot push the artifact outside the output directory.
+    ensure_within(out_dir, artifact_path)
+
+    # If the output dir lives inside the bundle, skip its whole subtree so
+    # previously-built artifacts are never re-packaged (keeps builds
+    # reproducible and bounded).
+    skip_dir = out_dir if out_dir != bundle_dir and _is_within(bundle_dir, out_dir) else None
+    # Also skip any prior build artifact for this bundle (e.g. an older
+    # <id>-<version>.zip sitting next to bundle.yml), not just the current one.
+    # Match only a semver-looking version segment so legitimate assets that
+    # merely start with the bundle id (e.g. <id>-assets.zip) are still packaged.
+    artifact_re = re.compile(
+        rf"^{re.escape(manifest.bundle.id)}-"
+        r"\d+\.\d+\.\d+(?:-[0-9A-Za-z.-]+)?(?:\+[0-9A-Za-z.-]+)?\.zip$"
+    )
+    files = _collect_files(
+        bundle_dir, skip=artifact_path, skip_dir=skip_dir, artifact_re=artifact_re
+    )
+    with zipfile.ZipFile(artifact_path, "w", zipfile.ZIP_DEFLATED) as archive:
+        for file_path in files:
+            # Confinement: every packaged file must live under bundle_dir.
+            ensure_within(bundle_dir, file_path)
+            arcname = file_path.relative_to(bundle_dir).as_posix()
+            # Fixed timestamp so identical inputs yield a byte-for-byte
+            # identical artifact (reproducible builds).
+            info = zipfile.ZipInfo(filename=arcname, date_time=_FIXED_TIMESTAMP)
+            info.compress_type = zipfile.ZIP_DEFLATED
+            # Reproducible, normalized permissions: preserve executability so
+            # bundled scripts (e.g. extension hook scripts) stay runnable after
+            # extraction, but collapse to two canonical modes (0755 when any
+            # execute bit is set on the source, otherwise 0644) so identical
+            # inputs yield a byte-for-byte identical artifact.
+            mode = 0o755 if file_path.stat().st_mode & 0o111 else 0o644
+            info.external_attr = mode << 16
+            archive.writestr(info, file_path.read_bytes())
+
+    return BuildResult(artifact_path=artifact_path, file_count=len(files))
+
+
+def _is_within(parent: Path, child: Path) -> bool:
+    try:
+        child.relative_to(parent)
+        return True
+    except ValueError:
+        return False
+
+
+def _collect_files(
+    bundle_dir: Path,
+    skip: Path,
+    skip_dir: Path | None = None,
+    artifact_re: re.Pattern[str] | None = None,
+) -> list[Path]:
+    collected: list[Path] = []
+    # followlinks=False so a symlinked directory is never descended into,
+    # which would otherwise pull in out-of-tree files and then fail at
+    # ensure_within(). Symlinked dirs are pruned from traversal explicitly.
+    for root, dirnames, filenames in os.walk(bundle_dir, followlinks=False):
+        root_path = Path(root)
+        # Prune directories we must not descend into (in-place edit of dirnames).
+        dirnames[:] = [
+            d
+            for d in dirnames
+            if d not in EXCLUDE_NAMES and not (root_path / d).is_symlink()
+        ]
+        if skip_dir is not None and _is_within(skip_dir, root_path):
+            dirnames[:] = []
+            continue
+        for name in filenames:
+            path = root_path / name
+            if path == skip:
+                continue
+            if name in EXCLUDE_NAMES:
+                continue
+            if artifact_re is not None and artifact_re.match(name):
+                # A prior build artifact for this bundle — never re-package it.
+                continue
+            if path.is_symlink():
+                # Skip symlinked files to avoid escaping the bundle directory.
+                continue
+            collected.append(path)
+    return sorted(collected)

src/specify_cli/bundler/services/primitives.py

@@ -0,0 +1,345 @@
+"""Bridge from bundler component kinds to existing primitive managers.
+
+The bundler does not own install logic; it routes each component to the
+existing Spec Kit primitive machinery so a bundle install behaves exactly as a
+sequence of ``specify <primitive> add`` calls would (Principle I: never
+reimplement or fake primitive behaviour).
+
+Routing strategy per kind:
+
+* **presets** / **extensions** — wired through their reusable managers
+  (``install_from_directory`` / ``install_from_zip``). Bundled assets shipped
+  with Spec Kit install fully offline; catalog assets are fetched only when
+  network access is permitted.
+* **workflows** / **steps** — their install/remove orchestration lives in the
+  CLI command layer rather than a reusable service method, so the bundler
+  delegates to those existing command callables in-process (with the project
+  root as the working directory) instead of duplicating their download and
+  validation logic.
+"""
+from __future__ import annotations
+
+import contextlib
+import os
+from pathlib import Path
+from typing import Protocol
+
+from .. import BundlerError
+from ..models.manifest import ComponentRef
+
+DEFAULT_PRIORITY = 10
+
+
+def _assert_pinned_version(
+    kind: str, component_id: str, pinned: str | None, advertised: object
+) -> None:
+    """Refuse to install when the catalog version differs from the manifest pin.
+
+    Bundle manifests pin component versions for reproducibility; installing
+    whatever the active catalog currently serves would silently violate the
+    pin. When the catalog advertises no version we cannot enforce the pin, so
+    installation proceeds (the catalog, not the bundler, owns that gap).
+    """
+    if not pinned or advertised is None:
+        return
+    actual = str(advertised).strip()
+    if not actual:
+        return
+    from ..lib.versioning import parse_version
+
+    try:
+        matches = parse_version(actual) == parse_version(pinned)
+    except BundlerError:
+        matches = actual == str(pinned).strip()
+    if not matches:
+        raise BundlerError(
+            f"{kind} '{component_id}' is pinned to version {pinned} in the bundle "
+            f"manifest, but the active catalog serves {actual}. Update the bundle's "
+            "pinned version or the catalog before installing."
+        )
+
+
+class _KindManager(Protocol):
+    def is_installed(self, component: ComponentRef) -> bool: ...
+
+    def install(self, component: ComponentRef) -> None: ...
+
+    def remove(self, component: ComponentRef) -> None: ...
+
+
+def primitive_manager(
+    kind: str, project_root: Path, *, allow_network: bool = True
+) -> _KindManager:
+    if kind == "presets":
+        return _PresetKindManager(project_root, allow_network)
+    if kind == "extensions":
+        return _ExtensionKindManager(project_root, allow_network)
+    if kind == "workflows":
+        return _WorkflowKindManager(project_root, allow_network)
+    if kind == "steps":
+        return _StepKindManager(project_root, allow_network)
+    raise BundlerError(f"Unknown component kind '{kind}'.")
+
+
+@contextlib.contextmanager
+def _chdir(path: Path):
+    """Temporarily switch the working directory.
+
+    The delegated workflow/step command callables resolve the project via
+    ``Path.cwd()``; this makes that resolution land on *path*.
+    """
+    previous = Path.cwd()
+    os.chdir(path)
+    try:
+        yield
+    finally:
+        os.chdir(previous)
+
+
+def _delegate_command(action: str, label: str, call) -> None:
+    """Run a delegated CLI command callable, translating its exit into errors."""
+    import typer
+
+    try:
+        call()
+    except typer.Exit as exc:  # raised by the delegated command on failure
+        code = getattr(exc, "exit_code", 0) or 0
+        if code != 0:
+            raise BundlerError(f"Failed to {action} {label}.") from exc
+    except SystemExit as exc:  # pragma: no cover - defensive
+        if exc.code not in (0, None):
+            raise BundlerError(f"Failed to {action} {label}.") from exc
+
+
+class _PresetKindManager:
+    def __init__(self, project_root: Path, allow_network: bool) -> None:
+        from ...presets import PresetManager
+
+        self._root = project_root
+        self._allow_network = allow_network
+        self._manager = PresetManager(project_root)
+
+    def is_installed(self, component: ComponentRef) -> bool:
+        try:
+            return self._manager.get_pack(component.id) is not None
+        except Exception:  # noqa: BLE001
+            return False
+
+    def install(self, component: ComponentRef) -> None:
+        from ... import get_speckit_version
+        from ..._assets import _locate_bundled_preset
+
+        speckit_version = get_speckit_version()
+        priority = DEFAULT_PRIORITY if component.priority is None else component.priority
+
+        bundled = _locate_bundled_preset(component.id)
+        if bundled is not None:
+            self._manager.install_from_directory(bundled, speckit_version, priority)
+            return
+
+        if not self._allow_network:
+            raise BundlerError(
+                f"Preset '{component.id}' is not bundled and network access is "
+                f"disabled; re-run without --offline or install it first with "
+                f"'specify preset add {component.id}'."
+            )
+
+        from ...presets import PresetCatalog
+
+        catalog = PresetCatalog(self._root)
+        info = catalog.get_pack_info(component.id)
+        if not info:
+            raise BundlerError(f"Preset '{component.id}' not found in any catalog.")
+        if not info.get("_install_allowed", True):
+            raise BundlerError(
+                f"Preset '{component.id}' is from a discovery-only catalog; "
+                "installation is not allowed."
+            )
+        _assert_pinned_version(
+            "Preset", component.id, component.version, info.get("version")
+        )
+        zip_path = catalog.download_pack(component.id)
+        try:
+            self._manager.install_from_zip(zip_path, speckit_version, priority)
+        finally:
+            with contextlib.suppress(Exception):
+                if zip_path.exists():
+                    zip_path.unlink()
+
+    def remove(self, component: ComponentRef) -> None:
+        try:
+            self._manager.remove(component.id)
+        except Exception as exc:  # noqa: BLE001
+            raise BundlerError(
+                f"Failed to remove preset '{component.id}': {exc}"
+            ) from exc
+
+
+class _ExtensionKindManager:
+    def __init__(self, project_root: Path, allow_network: bool) -> None:
+        from ...extensions import ExtensionManager
+
+        self._root = project_root
+        self._allow_network = allow_network
+        self._manager = ExtensionManager(project_root)
+
+    def is_installed(self, component: ComponentRef) -> bool:
+        try:
+            return self._manager.registry.is_installed(component.id)
+        except Exception:  # noqa: BLE001
+            return False
+
+    def install(self, component: ComponentRef) -> None:
+        from ... import get_speckit_version
+        from ..._assets import _locate_bundled_extension
+
+        speckit_version = get_speckit_version()
+        priority = DEFAULT_PRIORITY if component.priority is None else component.priority
+
+        bundled = _locate_bundled_extension(component.id)
+        if bundled is not None:
+            self._manager.install_from_directory(
+                bundled, speckit_version, priority=priority
+            )
+            return
+
+        if not self._allow_network:
+            raise BundlerError(
+                f"Extension '{component.id}' is not bundled and network access is "
+                f"disabled; re-run without --offline or install it first with "
+                f"'specify extension add {component.id}'."
+            )
+
+        from ...extensions import ExtensionCatalog
+
+        catalog = ExtensionCatalog(self._root)
+        info = catalog.get_extension_info(component.id)
+        if not info:
+            raise BundlerError(
+                f"Extension '{component.id}' not found in any catalog."
+            )
+        if not info.get("_install_allowed", True):
+            raise BundlerError(
+                f"Extension '{component.id}' is from a discovery-only catalog; "
+                "installation is not allowed."
+            )
+        _assert_pinned_version(
+            "Extension", component.id, component.version, info.get("version")
+        )
+        zip_path = catalog.download_extension(component.id)
+        try:
+            self._manager.install_from_zip(
+                zip_path, speckit_version, priority=priority
+            )
+        finally:
+            with contextlib.suppress(Exception):
+                if zip_path.exists():
+                    zip_path.unlink()
+
+    def remove(self, component: ComponentRef) -> None:
+        try:
+            self._manager.remove(component.id)
+        except Exception as exc:  # noqa: BLE001
+            raise BundlerError(
+                f"Failed to remove extension '{component.id}': {exc}"
+            ) from exc
+
+
+class _WorkflowKindManager:
+    def __init__(self, project_root: Path, allow_network: bool) -> None:
+        from ...workflows.catalog import WorkflowRegistry
+
+        self._root = project_root
+        self._allow_network = allow_network
+        self._registry = WorkflowRegistry(project_root)
+
+    def is_installed(self, component: ComponentRef) -> bool:
+        try:
+            return self._registry.is_installed(component.id)
+        except Exception:  # noqa: BLE001
+            return False
+
+    def install(self, component: ComponentRef) -> None:
+        if not self._allow_network and not self._is_bundled(component.id):
+            raise BundlerError(
+                f"Workflow '{component.id}' installs from a catalog and network "
+                f"access is disabled; re-run without --offline or install it first "
+                f"with 'specify workflow add {component.id}'."
+            )
+        self._assert_pinned_version(component)
+        from ... import workflow_add
+
+        with _chdir(self._root):
+            _delegate_command(
+                "install", f"workflow '{component.id}'",
+                lambda: workflow_add(component.id),
+            )
+
+    def _assert_pinned_version(self, component: ComponentRef) -> None:
+        if not component.version:
+            return
+        try:
+            from ...workflows.catalog import WorkflowCatalog
+
+            info = WorkflowCatalog(self._root).get_workflow_info(component.id)
+        except Exception:  # noqa: BLE001 - catalog unreachable: cannot enforce
+            return
+        if info:
+            _assert_pinned_version(
+                "Workflow", component.id, component.version, info.get("version")
+            )
+
+    @staticmethod
+    def _is_bundled(workflow_id: str) -> bool:
+        # A workflow that ships with Spec Kit installs fully offline.
+        from ..._assets import _locate_bundled_workflow
+
+        return _locate_bundled_workflow(workflow_id) is not None
+
+    def remove(self, component: ComponentRef) -> None:
+        from ... import workflow_remove
+
+        with _chdir(self._root):
+            _delegate_command(
+                "remove", f"workflow '{component.id}'",
+                lambda: workflow_remove(component.id),
+            )
+
+
+class _StepKindManager:
+    def __init__(self, project_root: Path, allow_network: bool) -> None:
+        from ...workflows.catalog import StepRegistry
+
+        self._root = project_root
+        self._allow_network = allow_network
+        self._registry = StepRegistry(project_root)
+
+    def is_installed(self, component: ComponentRef) -> bool:
+        try:
+            return self._registry.is_installed(component.id)
+        except Exception:  # noqa: BLE001
+            return False
+
+    def install(self, component: ComponentRef) -> None:
+        if not self._allow_network:
+            raise BundlerError(
+                f"Step '{component.id}' installs from a catalog and network access "
+                f"is disabled; re-run without --offline or install it first with "
+                f"'specify workflow step add {component.id}'."
+            )
+        from ... import workflow_step_add
+
+        with _chdir(self._root):
+            _delegate_command(
+                "install", f"step '{component.id}'",
+                lambda: workflow_step_add(component.id),
+            )
+
+    def remove(self, component: ComponentRef) -> None:
+        from ... import workflow_step_remove
+
+        with _chdir(self._root):
+            _delegate_command(
+                "remove", f"step '{component.id}'",
+                lambda: workflow_step_remove(component.id),
+            )

src/specify_cli/bundler/services/references.py

@@ -0,0 +1,114 @@
+"""Resolve bundle component references against real, available components.
+
+Used by ``specify bundle validate`` (FR-005 / SC-007) to confirm that every
+declared component points at something installable. Resolution is offline-first:
+a reference resolves when the component is bundled with Spec Kit or already
+installed in the project; catalog sources are consulted only when network access
+is permitted. Offline runs that cannot confirm a reference downgrade to a
+warning rather than a false failure, while definitively-unknown references
+always error.
+"""
+from __future__ import annotations
+
+from pathlib import Path
+
+from ..models.manifest import ComponentRef
+
+
+def _resolved_locally(root: Path, component: ComponentRef) -> bool:
+    kind = component.kind
+    try:
+        if kind == "presets":
+            from ..._assets import _locate_bundled_preset
+            from ...presets import PresetManager
+
+            if _locate_bundled_preset(component.id) is not None:
+                return True
+            return PresetManager(root).get_pack(component.id) is not None
+        if kind == "extensions":
+            from ..._assets import _locate_bundled_extension
+            from ...extensions import ExtensionManager
+
+            if _locate_bundled_extension(component.id) is not None:
+                return True
+            return ExtensionManager(root).registry.is_installed(component.id)
+        if kind == "workflows":
+            from ..._assets import _locate_bundled_workflow
+            from ...workflows.catalog import WorkflowRegistry
+
+            if _locate_bundled_workflow(component.id) is not None:
+                return True
+            return WorkflowRegistry(root).is_installed(component.id)
+        if kind == "steps":
+            from ...workflows.catalog import StepRegistry
+
+            return StepRegistry(root).is_installed(component.id)
+    except Exception:  # noqa: BLE001 - resolution is best-effort
+        return False
+    return False
+
+
+def _resolved_in_catalog(root: Path, component: ComponentRef) -> bool | None:
+    """Return True/False if a catalog could be consulted, or None on failure."""
+    kind = component.kind
+    try:
+        if kind == "presets":
+            from ...presets import PresetCatalog
+
+            return PresetCatalog(root).get_pack_info(component.id) is not None
+        if kind == "extensions":
+            from ...extensions import ExtensionCatalog
+
+            return ExtensionCatalog(root).get_extension_info(component.id) is not None
+        if kind == "workflows":
+            from ...workflows.catalog import WorkflowCatalog
+
+            return WorkflowCatalog(root).get_workflow_info(component.id) is not None
+        if kind == "steps":
+            from ...workflows.catalog import StepCatalog
+
+            return StepCatalog(root).get_step_info(component.id) is not None
+    except Exception:  # noqa: BLE001 - catalog may be unreachable/misconfigured
+        return None
+    return None
+
+
+def make_reference_checker(
+    project_root: Path,
+    *,
+    allow_network: bool,
+    warnings: list[str],
+):
+    """Build a ``ReferenceChecker`` for :func:`validate_manifest`.
+
+    Returns an error string for a reference that is definitively unresolvable,
+    ``None`` otherwise. Unverifiable references (offline, or an unreachable
+    catalog) append a note to *warnings* and pass.
+    """
+
+    def check(component: ComponentRef) -> str | None:
+        if _resolved_locally(project_root, component):
+            return None
+
+        if allow_network:
+            in_catalog = _resolved_in_catalog(project_root, component)
+            if in_catalog is True:
+                return None
+            if in_catalog is False:
+                return (
+                    f"{component.kind[:-1]} '{component.id}' is not bundled, "
+                    "installed, or present in any active catalog."
+                )
+            warnings.append(
+                f"Could not verify {component.kind[:-1]} '{component.id}' "
+                "(catalog unreachable); reference left unchecked."
+            )
+            return None
+
+        warnings.append(
+            f"Could not verify {component.kind[:-1]} '{component.id}' offline "
+            "(not bundled or installed); re-run validate online to check catalogs."
+        )
+        return None
+
+    return check

src/specify_cli/bundler/services/resolver.py

@@ -0,0 +1,122 @@
+"""Resolver: expand a bundle manifest into a concrete, ordered install plan.
+
+The plan the resolver produces is the single source of truth shared by
+``info`` (preview) and ``install`` (execution) so the two never diverge
+(SC-002 transparency). Resolution also enforces the SpecKit version gate
+(FR-016) and the integration-compatibility check (FR-019).
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from pathlib import Path
+
+from .. import BundlerError
+from ..lib.versioning import satisfies
+from ..models.manifest import BundleManifest, ComponentRef
+
+
+@dataclass
+class InstallPlan:
+    bundle_id: str
+    version: str
+    role: str
+    effective_integration: str | None
+    components: list[ComponentRef] = field(default_factory=list)
+    warnings: list[str] = field(default_factory=list)
+
+    @property
+    def component_count(self) -> int:
+        return len(self.components)
+
+    def grouped(self) -> dict[str, list[ComponentRef]]:
+        groups: dict[str, list[ComponentRef]] = {
+            "extensions": [],
+            "presets": [],
+            "steps": [],
+            "workflows": [],
+        }
+        for component in self.components:
+            groups.setdefault(component.kind, []).append(component)
+        return groups
+
+
+def resolve_install_plan(
+    manifest: BundleManifest,
+    *,
+    speckit_version: str,
+    active_integration: str | None,
+    integration_explicit: bool = False,
+    enforce_version: bool = True,
+) -> InstallPlan:
+    """Expand *manifest* into an :class:`InstallPlan`, enforcing gates.
+
+    Raises :class:`BundlerError` when a hard gate fails (version gate,
+    integration clash). Soft issues are collected in ``plan.warnings``.
+
+    *integration_explicit* signals that ``active_integration`` came from an
+    explicit ``--integration`` override rather than project auto-detection. When
+    a bundle pins an integration but the project's active integration cannot be
+    determined (``active_integration is None``) and the caller did not supply an
+    explicit override, resolution fails instead of silently adopting the
+    bundle's required integration (FR-019 guard).
+    """
+    structural = manifest.structural_errors()
+    if structural:
+        raise BundlerError(
+            "Cannot resolve an invalid manifest:\n  - " + "\n  - ".join(structural)
+        )
+
+    # FR-016: SpecKit version gate — refuse incompatible installs.
+    if enforce_version and manifest.requires.speckit_version:
+        if not satisfies(speckit_version, manifest.requires.speckit_version):
+            raise BundlerError(
+                f"Bundle '{manifest.bundle.id}' requires Spec Kit "
+                f"{manifest.requires.speckit_version}, but this project uses "
+                f"{speckit_version}. Update Spec Kit or choose a compatible bundle."
+            )
+
+    # FR-019: integration-compatibility — a bundle that pins a different
+    # integration than the project's active one halts (no silent change).
+    effective_integration = active_integration
+    if manifest.integration is not None:
+        required = manifest.integration.id
+        if active_integration and required != active_integration:
+            raise BundlerError(
+                f"Bundle '{manifest.bundle.id}' targets integration '{required}', "
+                f"but this project's active integration is '{active_integration}'. "
+                "Installing it would conflict; aborting with no changes."
+            )
+        if active_integration is None and not integration_explicit:
+            raise BundlerError(
+                f"Bundle '{manifest.bundle.id}' targets integration '{required}', "
+                "but this project's active integration could not be determined "
+                "(missing or unreadable .specify/integration.json). Re-run with "
+                "'--integration' to confirm the target, or repair the project "
+                "before installing."
+            )
+        effective_integration = required
+
+    warnings: list[str] = []
+    if manifest.requires.tools:
+        warnings.append(
+            "Requires external tools: " + ", ".join(manifest.requires.tools)
+        )
+    if manifest.requires.mcp:
+        warnings.append("Requires MCP servers: " + ", ".join(manifest.requires.mcp))
+
+    return InstallPlan(
+        bundle_id=manifest.bundle.id,
+        version=manifest.bundle.version,
+        role=manifest.bundle.role,
+        effective_integration=effective_integration,
+        components=list(manifest.components),
+        warnings=warnings,
+    )
+
+
+def load_manifest_from_dir(bundle_dir: Path) -> BundleManifest:
+    """Load ``bundle.yml`` from a bundle directory."""
+    manifest_path = Path(bundle_dir) / "bundle.yml"
+    if not manifest_path.exists():
+        raise BundlerError(f"No bundle.yml found in '{bundle_dir}'.")
+    return BundleManifest.from_file(manifest_path)

src/specify_cli/bundler/services/validator.py

@@ -0,0 +1,60 @@
+"""Validator: structural + reference validation for a bundle manifest.
+
+``specify bundle validate`` reports whether a manifest is well-formed and all
+component references are resolvable. Structural checks come from the manifest
+model; reference resolution is optional (requires a resolver callback) so the
+command can run fully offline against pinned/local references.
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass, field
+from typing import Callable
+
+from .. import BundlerError
+from ..lib.versioning import parse_constraint
+from ..models.manifest import BundleManifest, ComponentRef
+
+# A reference checker returns None when resolvable, or an error string.
+ReferenceChecker = Callable[[ComponentRef], str | None]
+
+
+@dataclass
+class ValidationReport:
+    errors: list[str] = field(default_factory=list)
+    warnings: list[str] = field(default_factory=list)
+
+    @property
+    def ok(self) -> bool:
+        return not self.errors
+
+    def merge(self, other: "ValidationReport") -> None:
+        self.errors.extend(other.errors)
+        self.warnings.extend(other.warnings)
+
+
+def validate_manifest(
+    manifest: BundleManifest,
+    reference_checker: ReferenceChecker | None = None,
+) -> ValidationReport:
+    report = ValidationReport()
+
+    report.errors.extend(manifest.structural_errors())
+
+    if manifest.requires.speckit_version:
+        try:
+            parse_constraint(manifest.requires.speckit_version)
+        except BundlerError as exc:
+            report.errors.append(
+                f"requires.speckit_version '{manifest.requires.speckit_version}' "
+                f"is not a valid constraint: {exc}"
+            )
+
+    if reference_checker is not None:
+        for component in manifest.components:
+            problem = reference_checker(component)
+            if problem:
+                report.errors.append(
+                    f"Unresolved reference {component.label()}: {problem}"
+                )
+
+    return report

src/specify_cli/commands/bundle/__init__.py

@@ -0,0 +1,834 @@
+"""``specify bundle`` command group — discover, install, author Spec Kit bundles.
+
+This module is the CLI/UX layer only (Principle I: thin commands over services).
+Each command resolves a project, builds a catalog stack, delegates to a bundler
+service, and renders Rich output. ``--json`` emits machine-readable data on
+stdout; human logs go to stderr/console.
+"""
+from __future__ import annotations
+
+import json as _json
+import re
+from pathlib import Path
+
+import typer
+
+from ..._console import console
+from ...bundler import BundlerError
+from ...bundler.lib.project import (
+    active_integration,
+    find_project_root,
+    require_project_root,
+)
+from ...bundler.models.records import load_records
+
+bundle_app = typer.Typer(
+    name="bundle",
+    help="Discover, install, and author Spec Kit bundles",
+    add_completion=False,
+)
+
+bundle_catalog_app = typer.Typer(
+    name="catalog",
+    help="Manage bundle catalog sources",
+    add_completion=False,
+)
+bundle_app.add_typer(bundle_catalog_app, name="catalog")
+
+
+# ===== helpers =====
+
+
+def _fail(message: str) -> None:
+    """Print an actionable error to stderr and exit non-zero."""
+    console.print(f"[red]Error:[/red] {message}", style=None)
+    raise typer.Exit(code=1)
+
+
+def _user_config_dir() -> Path:
+    # User-scope Spec Kit config lives under ~/.specify (same convention as
+    # auth.json, extension/preset catalogs). Passing this through to the source
+    # stack is what makes the documented project > user > built-in precedence
+    # reachable from the CLI.
+    return Path.home() / ".specify"
+
+
+def _build_stack(project_root: Path, *, offline: bool):
+    from ...bundler.services.adapters import make_catalog_fetcher
+    from ...bundler.services.catalog_stack import CatalogStack
+
+    fetcher = make_catalog_fetcher(allow_network=not offline)
+    return CatalogStack.load(project_root, fetcher, user_config_dir=_user_config_dir())
+
+
+def _speckit_version() -> str:
+    from ..._assets import get_speckit_version
+
+    return get_speckit_version()
+
+
+def _trust_level(verified: bool) -> str:
+    """Trust framing for a catalog entry (FR-010): org-curated vs community."""
+    return "verified" if verified else "community"
+
+
+def _trust_badge(verified: bool) -> str:
+    return (
+        "[green]✔ verified[/green]"
+        if verified
+        else "[yellow]community[/yellow]"
+    )
+
+
+def _default_script_type() -> str:
+    """OS-appropriate default script flavor (FR-013)."""
+    import os
+
+    return "ps" if os.name == "nt" else "sh"
+
+
+def _run_init(integration: str, *, script_type: str, offline: bool = False) -> None:
+    """Idempotently scaffold a Spec Kit project here via the existing ``init`` machinery.
+
+    Reuses the real ``specify init`` command callback in-process (Principle I)
+    with ``--here --force`` so it is non-interactive and merges into the current
+    directory.
+    """
+    from ... import app
+
+    init_cb = next(
+        c.callback
+        for c in app.registered_commands
+        if c.callback and c.callback.__name__ == "init"
+    )
+    try:
+        init_cb(
+            project_name=None,
+            script_type=script_type,
+            ignore_agent_tools=True,
+            here=True,
+            force=True,
+            skip_tls=False,
+            debug=False,
+            github_token=None,
+            offline=offline,
+            preset=None,
+            integration=integration,
+            integration_options=None,
+        )
+    except typer.Exit as exc:
+        if exc.exit_code:
+            raise BundlerError(
+                f"Failed to initialize a Spec Kit project (integration '{integration}')."
+            ) from exc
+
+
+def _resolve_init_integration(override: str | None, manifest) -> str:
+    """Precedence (FR-013): explicit override → bundle-declared → default."""
+    from ..._agent_config import DEFAULT_INIT_INTEGRATION
+
+    if override:
+        return override
+    if manifest is not None and manifest.integration is not None:
+        return manifest.integration.id
+    return DEFAULT_INIT_INTEGRATION
+
+
+# ===== Consume =====
+
+
+@bundle_app.command("search")
+def bundle_search(
+    query: str = typer.Argument("", help="Optional text query"),
+    offline: bool = typer.Option(False, "--offline", help="Do not access the network"),
+    as_json: bool = typer.Option(False, "--json", help="Emit JSON to stdout"),
+) -> None:
+    """List matching bundles across the active catalog stack."""
+    try:
+        project_root = find_project_root() or Path.cwd()
+        stack = _build_stack(project_root, offline=offline)
+        results = stack.search(query)
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    if as_json:
+        payload = [
+            {
+                "id": r.entry.id,
+                "name": r.entry.name,
+                "role": r.entry.role,
+                "version": r.entry.version,
+                "description": r.entry.description,
+                "source": r.source.id,
+                "install_policy": r.source.install_policy.value,
+                "verified": r.entry.verified,
+                "trust": _trust_level(r.entry.verified),
+            }
+            for r in results
+        ]
+        print(_json.dumps(payload, indent=2))
+        return
+
+    if not results:
+        console.print("[yellow]No matching bundles found.[/yellow]")
+        return
+
+    console.print("\n[bold cyan]Bundles:[/bold cyan]\n")
+    for r in results:
+        policy = (
+            "[dim](discovery-only)[/dim]"
+            if not r.source.install_allowed
+            else ""
+        )
+        console.print(
+            f"  [bold]{r.entry.id}[/bold] v{r.entry.version} — {r.entry.name} "
+            f"[dim]({r.entry.role})[/dim] {_trust_badge(r.entry.verified)} {policy}"
+        )
+        console.print(f"    {r.entry.description}")
+        console.print(f"    [dim]source: {r.source.id}[/dim]")
+
+
+@bundle_app.command("info")
+def bundle_info(
+    bundle_id: str = typer.Argument(..., help="Bundle id to inspect"),
+    offline: bool = typer.Option(False, "--offline", help="Do not access the network"),
+    as_json: bool = typer.Option(False, "--json", help="Emit JSON to stdout"),
+) -> None:
+    """Show full metadata and the fully expanded component set (== what install adds)."""
+    try:
+        project_root = find_project_root() or Path.cwd()
+        stack = _build_stack(project_root, offline=offline)
+        resolved = stack.resolve(bundle_id)
+        # `info` must show the fully expanded component set that `install` would
+        # apply (contracts/cli-commands.md). Expansion happens regardless of
+        # install policy — discovery-only bundles stay inspectable; only
+        # `install` is refused. But if the manifest itself can't be resolved
+        # (e.g. --offline against an https:// download_url, or a download
+        # failure), fail loudly and exit non-zero rather than silently
+        # degrading to catalog `provides` counts, so users never mistake an
+        # unverifiable bundle for a known/installable one.
+        manifest = _download_manifest(resolved, offline=offline)
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    overlaps = _bundle_overlaps(project_root, manifest, offline=offline)
+    components = _manifest_component_view(manifest)
+
+    entry = resolved.entry
+    if as_json:
+        payload = {
+            "id": entry.id,
+            "name": entry.name,
+            "version": entry.version,
+            "role": entry.role,
+            "description": entry.description,
+            "author": entry.author,
+            "license": entry.license,
+            "source": resolved.source.id,
+            "install_policy": resolved.source.install_policy.value,
+            "provides": entry.provides,
+            "requires": {"speckit_version": entry.requires_speckit_version},
+            "verified": entry.verified,
+            "trust": _trust_level(entry.verified),
+            "integration": (manifest.integration.id if manifest and manifest.integration else None),
+            "components": components,
+            "overlaps": overlaps,
+        }
+        print(_json.dumps(payload, indent=2))
+        return
+
+    console.print(f"\n[bold cyan]{entry.id}[/bold cyan] v{entry.version} — {entry.name}")
+    console.print(f"  Role: {entry.role}")
+    console.print(f"  {entry.description}")
+    console.print(f"  Author: {entry.author}   License: {entry.license}")
+    console.print(f"  Source: {resolved.source.id} ({resolved.source.install_policy.value})")
+    console.print(f"  Trust: {_trust_badge(entry.verified)}")
+    if entry.requires_speckit_version:
+        console.print(f"  Requires Spec Kit: {entry.requires_speckit_version}")
+    if manifest and manifest.integration:
+        console.print(f"  Integration: {manifest.integration.id}")
+
+    if components:
+        console.print("\n  [bold]Components[/bold] (added on install):")
+        for kind in ("extensions", "presets", "steps", "workflows"):
+            items = [c for c in components if c["kind"] == kind]
+            if not items:
+                continue
+            console.print(f"    [bold]{kind}:[/bold]")
+            for item in items:
+                console.print(f"      - {_format_component(item)}")
+    else:
+        console.print("\n  [bold]Provides:[/bold]")
+        for kind in ("extensions", "presets", "steps", "workflows"):
+            count = entry.provides.get(kind, 0)
+            if count:
+                console.print(f"    {kind}: {count}")
+
+    if overlaps:
+        console.print("\n  [yellow]Overlaps with already-installed bundles:[/yellow]")
+        for overlap in overlaps:
+            console.print(f"    [yellow]-[/yellow] {overlap}")
+
+    if not resolved.install_allowed:
+        console.print(
+            "\n  [yellow]This source is discovery-only; the bundle cannot be "
+            "installed from here.[/yellow]"
+        )
+
+
+@bundle_app.command("list")
+def bundle_list(
+    as_json: bool = typer.Option(False, "--json", help="Emit JSON to stdout"),
+) -> None:
+    """List bundles currently installed in the project with versions."""
+    try:
+        project_root = require_project_root()
+        records = load_records(project_root)
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    if as_json:
+        print(_json.dumps([r.to_dict() for r in records], indent=2))
+        return
+
+    if not records:
+        console.print("[yellow]No bundles installed.[/yellow]")
+        console.print("\nInstall one with: [cyan]specify bundle install <id>[/cyan]")
+        return
+
+    console.print("\n[bold cyan]Installed bundles:[/bold cyan]\n")
+    for record in records:
+        console.print(
+            f"  [bold]{record.bundle_id}[/bold] v{record.version} "
+            f"[dim]({len(record.contributed_components)} components, "
+            f"installed {record.installed_at})[/dim]"
+        )
+
+
+@bundle_app.command("install")
+def bundle_install(
+    bundle_id: str = typer.Argument(
+        ...,
+        help="Bundle id (from the catalog stack) or a local path to a .zip "
+        "artifact, bundle directory, or bundle.yml",
+    ),
+    integration: str = typer.Option(None, "--integration", help="Override integration"),
+    offline: bool = typer.Option(False, "--offline", help="Do not access the network"),
+) -> None:
+    """Install a bundle's full component set through each primitive's machinery.
+
+    ``bundle_id`` may be a catalog bundle id, or a local path to a built
+    artifact (``.zip``), a bundle directory, or a ``bundle.yml`` file. Local
+    sources install directly without consulting the catalog stack.
+    """
+    try:
+        from ...bundler.lib.project import find_project_root
+        from ...bundler.services.adapters import DefaultPrimitiveInstaller
+        from ...bundler.services.installer import install_bundle
+        from ...bundler.services.resolver import resolve_install_plan
+
+        project_root = find_project_root()
+
+        local_manifest = _local_manifest_source(bundle_id)
+        if local_manifest is not None:
+            manifest = local_manifest
+        else:
+            stack = _build_stack(project_root or Path.cwd(), offline=offline)
+            resolved = stack.resolve(bundle_id)
+
+            if not resolved.install_allowed:
+                raise BundlerError(
+                    f"Bundle '{bundle_id}' resolves only from a discovery-only source "
+                    f"('{resolved.source.id}'); it cannot be installed from there."
+                )
+            manifest = _download_manifest(resolved, offline=offline)
+
+        if project_root is None:
+            init_integration = _resolve_init_integration(integration, manifest)
+            console.print(
+                f"[cyan]No Spec Kit project here; initializing with integration "
+                f"'{init_integration}'…[/cyan]"
+            )
+            _run_init(init_integration, script_type=_default_script_type(), offline=offline)
+            project_root = require_project_root()
+
+        for overlap in _bundle_overlaps(project_root, manifest, offline=offline):
+            console.print(f"[yellow]![/yellow] {overlap}")
+
+        # For an already-initialized project, the project's recorded active
+        # integration is authoritative — an explicit --integration must not be
+        # able to bypass the FR-019 integration-clash guard. The override only
+        # selects the integration at init time (handled above) or confirms the
+        # target when the active integration cannot be determined.
+        detected = active_integration(project_root)
+        plan = resolve_install_plan(
+            manifest,
+            speckit_version=_speckit_version(),
+            active_integration=detected if detected is not None else integration,
+            integration_explicit=bool(integration) and detected is None,
+        )
+        for warning in plan.warnings:
+            console.print(f"[yellow]![/yellow] {warning}")
+
+        result = install_bundle(
+            project_root,
+            plan,
+            DefaultPrimitiveInstaller(allow_network=not offline),
+            manifest=manifest,
+        )
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    console.print(
+        f"[green]✓[/green] Installed '{result.bundle_id}' "
+        f"({len(result.installed)} added, {len(result.skipped)} already present)."
+    )
+
+
+@bundle_app.command("update")
+def bundle_update(
+    bundle_id: str = typer.Argument(None, help="Bundle id, or omit with --all"),
+    all_bundles: bool = typer.Option(False, "--all", help="Update every installed bundle"),
+    integration: str = typer.Option(None, "--integration", help="Override integration"),
+    offline: bool = typer.Option(False, "--offline", help="Do not access the network"),
+) -> None:
+    """Re-resolve and refresh a bundle's components via each primitive's update path."""
+    try:
+        project_root = require_project_root()
+        records = load_records(project_root)
+        if not all_bundles and not bundle_id:
+            raise BundlerError("Specify a bundle id or use --all.")
+        targets = (
+            [r.bundle_id for r in records]
+            if all_bundles
+            else [bundle_id]
+        )
+        if not targets:
+            console.print("[yellow]No installed bundles to update.[/yellow]")
+            return
+
+        stack = _build_stack(project_root, offline=offline)
+        from ...bundler.services.adapters import DefaultPrimitiveInstaller
+        from ...bundler.services.installer import install_bundle
+        from ...bundler.services.resolver import resolve_install_plan
+
+        installer = DefaultPrimitiveInstaller(allow_network=not offline)
+        for target in targets:
+            if not any(r.bundle_id == target for r in records):
+                raise BundlerError(f"Bundle '{target}' is not installed.")
+            resolved = stack.resolve(target)
+            if not resolved.install_allowed:
+                raise BundlerError(
+                    f"Bundle '{target}' resolves only from a discovery-only source "
+                    f"('{resolved.source.id}'); it cannot be updated from there. "
+                    "Update requires an install-allowed source (FR-025)."
+                )
+            manifest = _download_manifest(resolved, offline=offline)
+            detected = active_integration(project_root)
+            plan = resolve_install_plan(
+                manifest,
+                speckit_version=_speckit_version(),
+                active_integration=detected if detected is not None else integration,
+                integration_explicit=bool(integration) and detected is None,
+            )
+            install_bundle(project_root, plan, installer, manifest=manifest, refresh=True)
+            console.print(f"[green]✓[/green] Updated '{target}' to v{plan.version}.")
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+
+@bundle_app.command("remove")
+def bundle_remove(
+    bundle_id: str = typer.Argument(..., help="Installed bundle id to remove"),
+) -> None:
+    """Uninstall only the components this bundle contributed (no collateral removals)."""
+    try:
+        project_root = require_project_root()
+        from ...bundler.services.adapters import DefaultPrimitiveInstaller
+        from ...bundler.services.installer import remove_bundle
+
+        result = remove_bundle(project_root, bundle_id, DefaultPrimitiveInstaller())
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    console.print(
+        f"[green]✓[/green] Removed '{result.bundle_id}' "
+        f"({len(result.uninstalled)} uninstalled, {len(result.skipped)} kept for other bundles)."
+    )
+
+
+# ===== Author =====
+
+
+@bundle_app.command("validate")
+def bundle_validate(
+    path: Path = typer.Option(
+        None, "--path", help="Bundle directory or bundle.yml (default: cwd)"
+    ),
+    offline: bool = typer.Option(
+        False,
+        "--offline",
+        help="Do not access catalogs; verify references against bundled/installed only",
+    ),
+) -> None:
+    """Report whether the manifest is well-formed and references resolve."""
+    try:
+        manifest_path = _resolve_manifest_path(path)
+        from ...bundler.lib.project import find_project_root
+        from ...bundler.models.manifest import BundleManifest
+        from ...bundler.services.references import make_reference_checker
+        from ...bundler.services.validator import validate_manifest
+
+        manifest = BundleManifest.from_file(manifest_path)
+        ref_root = find_project_root(manifest_path.parent) or Path.cwd()
+        ref_warnings: list[str] = []
+        checker = make_reference_checker(
+            ref_root, allow_network=not offline, warnings=ref_warnings
+        )
+        report = validate_manifest(manifest, reference_checker=checker)
+        report.warnings.extend(ref_warnings)
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    for warning in report.warnings:
+        console.print(f"[yellow]![/yellow] {warning}")
+    if not report.ok:
+        console.print("[red]Manifest is invalid:[/red]")
+        for error in report.errors:
+            console.print(f"  [red]-[/red] {error}")
+        raise typer.Exit(code=1)
+    console.print(f"[green]✓[/green] {manifest.bundle.id} is well-formed and valid.")
+
+
+@bundle_app.command("build")
+def bundle_build(
+    path: Path = typer.Option(
+        None, "--path", help="Bundle directory (default: cwd)"
+    ),
+    output: Path = typer.Option(None, "--output", help="Output directory for the artifact"),
+) -> None:
+    """Produce a single versioned distributable artifact (.zip)."""
+    try:
+        bundle_dir = (path or Path.cwd()).resolve()
+        if bundle_dir.is_file():
+            bundle_dir = bundle_dir.parent
+        from ...bundler.services.packager import build_bundle
+
+        result = build_bundle(bundle_dir, output_dir=output)
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    console.print(
+        f"[green]✓[/green] Built {result.artifact_path.name} "
+        f"({result.file_count} files) → {result.artifact_path}"
+    )
+
+
+@bundle_app.command("init")
+def bundle_init(
+    bundle: str = typer.Argument(None, help="Optional bundle to install after init"),
+    integration: str = typer.Option(None, "--integration", help="Integration override"),
+    offline: bool = typer.Option(False, "--offline", help="Do not access the network"),
+) -> None:
+    """Ensure the project is initialized (idempotent), then optionally install a bundle."""
+    from ...bundler.lib.project import find_project_root
+
+    try:
+        project_root = find_project_root()
+        if project_root is None:
+            init_integration = _resolve_init_integration(integration, None)
+            console.print(
+                f"[cyan]Initializing a Spec Kit project with integration "
+                f"'{init_integration}'…[/cyan]"
+            )
+            _run_init(init_integration, script_type=_default_script_type(), offline=offline)
+            project_root = require_project_root()
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    console.print(f"[green]✓[/green] Spec Kit project ready at {project_root}.")
+    if bundle:
+        bundle_install(bundle, integration=integration, offline=offline)
+
+
+# ===== Catalog management =====
+
+
+@bundle_catalog_app.command("list")
+def catalog_list() -> None:
+    """Print the active, priority-ordered catalog stack with scope and policy."""
+    try:
+        project_root = require_project_root()
+        from ...bundler.models.catalog import Scope, load_source_stack
+
+        sources = load_source_stack(project_root, user_config_dir=_user_config_dir())
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    console.print("\n[bold cyan]Catalog stack[/bold cyan] (highest precedence first):\n")
+    only_builtin = all(s.scope == Scope.BUILTIN for s in sources)
+    for source in sources:
+        console.print(
+            f"  [bold]{source.id}[/bold]  priority={source.priority}  "
+            f"policy={source.install_policy.value}  scope={source.scope.value}"
+        )
+        console.print(f"    [dim]{source.url}[/dim]")
+    if only_builtin:
+        console.print("\n[dim]Using the built-in default stack.[/dim]")
+
+
+@bundle_catalog_app.command("add")
+def catalog_add(
+    url: str = typer.Argument(..., help="Catalog URL"),
+    policy: str = typer.Option(
+        "install-allowed", "--policy", help="install-allowed | discovery-only"
+    ),
+    priority: int = typer.Option(10, "--priority", help="Source priority (lower = higher)"),
+    source_id: str = typer.Option(None, "--id", help="Explicit source id"),
+) -> None:
+    """Register a project-scoped catalog source and persist it."""
+    try:
+        project_root = require_project_root()
+        from ...bundler.commands_impl.catalog_config import add_source
+
+        source = add_source(project_root, url, policy=policy, priority=priority, source_id=source_id)
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    console.print(
+        f"[green]✓[/green] Added catalog '{source.id}' "
+        f"(priority {source.priority}, {source.install_policy.value})."
+    )
+
+
+@bundle_catalog_app.command("remove")
+def catalog_remove(
+    id_or_url: str = typer.Argument(..., help="Source id or url to remove"),
+) -> None:
+    """Remove a project-scoped catalog source (built-in defaults can't be deleted)."""
+    try:
+        project_root = require_project_root()
+        from ...bundler.commands_impl.catalog_config import remove_source
+
+        removed = remove_source(project_root, id_or_url)
+    except BundlerError as exc:
+        _fail(str(exc))
+        return
+
+    console.print(f"[green]✓[/green] Removed catalog source '{removed}'.")
+
+
+# ===== internal helpers =====
+
+
+def _manifest_component_view(manifest) -> list[dict]:
+    """Flatten a manifest's components to JSON-friendly dicts (id, version, ...)."""
+    if manifest is None:
+        return []
+    view: list[dict] = []
+    for component in manifest.components:
+        item = {
+            "kind": component.kind,
+            "id": component.id,
+            "version": component.version,
+        }
+        if component.priority is not None:
+            item["priority"] = component.priority
+        if component.strategy is not None:
+            item["strategy"] = component.strategy
+        view.append(item)
+    return view
+
+
+def _format_component(item: dict) -> str:
+    label = f"{item['id']} v{item['version']}" if item.get("version") else item["id"]
+    extras = []
+    if item.get("priority") is not None:
+        extras.append(f"priority={item['priority']}")
+    if item.get("strategy") is not None:
+        extras.append(f"strategy={item['strategy']}")
+    if extras:
+        label += f" ({', '.join(extras)})"
+    return label
+
+
+def _bundle_overlaps(project_root: Path, manifest, *, offline: bool) -> list[str]:
+    """Return informational overlaps between *manifest* and installed bundles."""
+    if manifest is None:
+        return []
+    try:
+        from ...bundler.services.conflict import detect_conflicts
+
+        report = detect_conflicts(
+            manifest,
+            active_integration(project_root),
+            load_records(project_root),
+        )
+        return list(report.overlaps)
+    except BundlerError:
+        return []
+
+
+def _local_manifest_source(arg: str):
+    """Return a :class:`BundleManifest` if *arg* points at a local bundle.
+
+    Supports a built ``.zip`` artifact, a bundle directory, or a ``bundle.yml``
+    file. Returns ``None`` when *arg* is not an existing path, so callers fall
+    back to catalog-stack resolution by bundle id.
+    """
+    from ...bundler.models.manifest import BundleManifest
+
+    candidate = Path(arg).expanduser()
+    if not candidate.exists():
+        return None
+
+    if candidate.is_dir():
+        manifest_path = candidate / "bundle.yml"
+        if not manifest_path.exists():
+            raise BundlerError(f"No bundle.yml found in '{candidate}'.")
+        return BundleManifest.from_file(manifest_path)
+
+    if candidate.suffix == ".zip":
+        import io
+        import zipfile
+
+        import yaml as _yaml
+
+        with zipfile.ZipFile(candidate) as archive:
+            try:
+                raw = archive.read("bundle.yml")
+            except KeyError as exc:
+                raise BundlerError(
+                    f"Artifact '{candidate}' does not contain a bundle.yml."
+                ) from exc
+        data = _yaml.safe_load(io.BytesIO(raw))
+        return BundleManifest.from_dict(data)
+
+    if candidate.name == "bundle.yml" or candidate.suffix in (".yml", ".yaml"):
+        return BundleManifest.from_file(candidate)
+
+    raise BundlerError(
+        f"'{candidate}' is not a recognised bundle source (.zip artifact, bundle "
+        "directory, or bundle.yml)."
+    )
+
+
+def _resolve_manifest_path(path: Path | None) -> Path:
+    target = (path or Path.cwd()).resolve()
+    if target.is_dir():
+        target = target / "bundle.yml"
+    if not target.exists():
+        raise BundlerError(f"No bundle.yml found at '{target}'.")
+    return target
+
+
+def _download_manifest(resolved, *, offline: bool):
+    """Resolve a bundle's manifest from its catalog ``download_url``.
+
+    Local/``file://`` URLs always work offline and may point at a ``.zip``
+    artifact, a bundle directory, or a ``bundle.yml`` (handled by
+    :func:`_local_manifest_source`). Remote ``https://`` URLs are fetched with
+    the shared authenticated, redirect-validated HTTP client, and only when not
+    ``--offline``.
+    """
+    from urllib.parse import urlparse
+
+    url = resolved.entry.download_url
+    if not url:
+        raise BundlerError(
+            f"Catalog entry '{resolved.entry.id}' has no download_url; cannot resolve "
+            "its manifest."
+        )
+    parsed = urlparse(url)
+    scheme = parsed.scheme.lower()
+
+    # On Windows an absolute path like ``C:\bundle.yml`` parses with a
+    # single-letter ``scheme``; treat it as a local file, not a URL scheme.
+    if scheme in ("", "file") or re.match(r"^[A-Za-z]:[\\/]", url):
+        local = Path(parsed.path if scheme == "file" else url)
+        manifest = _local_manifest_source(str(local))
+        if manifest is None:
+            raise BundlerError(f"Bundle manifest not found: {local}")
+        return manifest
+
+    if scheme in ("http", "https"):
+        if offline:
+            raise BundlerError(
+                f"Network access disabled; cannot download bundle '{resolved.entry.id}' "
+                f"from {url}."
+            )
+        return _download_remote_manifest(resolved.entry.id, url)
+
+    raise BundlerError(
+        f"Unsupported download_url scheme for bundle '{resolved.entry.id}': {url}"
+    )
+
+
+def _require_https(label: str, url: str) -> None:
+    from urllib.parse import urlparse
+
+    parsed = urlparse(url)
+    is_localhost = parsed.hostname in ("localhost", "127.0.0.1", "::1")
+    if parsed.scheme != "https" and not (parsed.scheme == "http" and is_localhost):
+        raise BundlerError(
+            f"Refusing to download {label} over non-HTTPS URL: {url}"
+        )
+    if not parsed.hostname:
+        raise BundlerError(f"Refusing to download {label} from URL with no host: {url}")
+
+
+def _download_remote_manifest(entry_id: str, url: str):
+    """Fetch a remote bundle artifact over HTTPS and extract its manifest."""
+    import io
+    import tempfile
+
+    from ...authentication.http import open_url
+
+    def _validate_redirect(old_url: str, new_url: str) -> None:
+        _require_https(f"bundle '{entry_id}'", new_url)
+
+    _require_https(f"bundle '{entry_id}'", url)
+    try:
+        with open_url(url, timeout=30, redirect_validator=_validate_redirect) as resp:
+            _require_https(f"bundle '{entry_id}'", resp.geturl())
+            raw = resp.read()
+    except BundlerError:
+        raise
+    except Exception as exc:  # noqa: BLE001
+        raise BundlerError(f"Failed to download bundle '{entry_id}' from {url}: {exc}") from exc
+
+    # A .zip artifact is written to a temp file and parsed via the local-source
+    # path (which extracts bundle.yml); any other payload is treated as YAML.
+    if url.lower().endswith(".zip"):
+        with tempfile.TemporaryDirectory() as tmp:
+            artifact = Path(tmp) / "bundle.zip"
+            artifact.write_bytes(raw)
+            manifest = _local_manifest_source(str(artifact))
+            if manifest is None:
+                raise BundlerError(
+                    f"Downloaded artifact for bundle '{entry_id}' is not a valid bundle."
+                )
+            return manifest
+
+    import yaml as _yaml
+
+    from ...bundler.models.manifest import BundleManifest
+
+    data = _yaml.safe_load(io.BytesIO(raw))
+    return BundleManifest.from_dict(data)
+
+
+def register(app: typer.Typer) -> None:
+    """Attach the bundle command group to the root Typer app."""
+    app.add_typer(bundle_app, name="bundle")

tests/bundler_helpers.py

@@ -0,0 +1,125 @@
+"""Shared helpers and fakes for bundler tests.
+
+Kept out of ``tests/conftest.py`` so the existing root fixtures are untouched.
+Import what you need explicitly, e.g.::
+
+    from tests.bundler_helpers import FakeInstaller, write_manifest
+"""
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import yaml
+
+from specify_cli.bundler.models.manifest import ComponentRef
+
+
+def valid_manifest_dict(**overrides) -> dict:
+    """Return a structurally valid manifest dict; override any top-level key."""
+    data = {
+        "schema_version": "1.0",
+        "bundle": {
+            "id": "demo-bundle",
+            "name": "Demo Bundle",
+            "version": "1.2.0",
+            "role": "developer",
+            "description": "A demo bundle for tests.",
+            "author": "Spec Kit",
+            "license": "MIT",
+        },
+        "requires": {"speckit_version": ">=0.1.0"},
+        "provides": {
+            "extensions": [{"id": "ext-a", "version": "1.0.0"}],
+            "presets": [
+                {"id": "preset-a", "version": "2.0.0", "priority": 10, "strategy": "append"}
+            ],
+            "steps": [{"id": "step-a"}],
+            "workflows": [{"id": "wf-a", "version": "0.3.0"}],
+        },
+        "tags": ["demo", "test"],
+    }
+    data.update(overrides)
+    return data
+
+
+def write_manifest(directory: Path, data: dict | None = None) -> Path:
+    directory.mkdir(parents=True, exist_ok=True)
+    manifest_path = directory / "bundle.yml"
+    manifest_path.write_text(
+        yaml.safe_dump(data if data is not None else valid_manifest_dict()),
+        encoding="utf-8",
+    )
+    return manifest_path
+
+
+def make_project(root: Path) -> Path:
+    """Create a minimal Spec Kit project skeleton under *root*."""
+    (root / ".specify").mkdir(parents=True, exist_ok=True)
+    return root
+
+
+def catalog_payload(bundles: dict | None = None) -> dict:
+    return {
+        "schema_version": "1.0",
+        "updated_at": "2026-06-19T00:00:00Z",
+        "catalog_url": "file://test",
+        "bundles": bundles or {},
+    }
+
+
+def catalog_entry_dict(bundle_id: str = "demo-bundle", **overrides) -> dict:
+    entry = {
+        "id": bundle_id,
+        "name": "Demo Bundle",
+        "version": "1.2.0",
+        "role": "developer",
+        "description": "A demo bundle.",
+        "author": "Spec Kit",
+        "license": "MIT",
+        "download_url": "",
+        "requires": {"speckit_version": ">=0.1.0"},
+        "provides": {"extensions": 1, "presets": 1, "steps": 1, "workflows": 1},
+        "verified": True,
+    }
+    entry.update(overrides)
+    return entry
+
+
+def write_catalog_file(path: Path, bundles: dict) -> Path:
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(json.dumps(catalog_payload(bundles)), encoding="utf-8")
+    return path
+
+
+class FakeInstaller:
+    """Deterministic in-memory PrimitiveInstaller for offline integration tests."""
+
+    def __init__(self, *, fail_on: str | None = None) -> None:
+        self.installed: set[tuple[str, str]] = set()
+        self.install_calls: list[tuple[str, str]] = []
+        self.remove_calls: list[tuple[str, str]] = []
+        self.refresh_calls: list[tuple[str, str]] = []
+        self._fail_on = fail_on
+
+    def _key(self, component: ComponentRef) -> tuple[str, str]:
+        return (component.kind, component.id)
+
+    def is_installed(self, project_root: Path, component: ComponentRef) -> bool:
+        return self._key(component) in self.installed
+
+    def install(self, project_root: Path, component: ComponentRef) -> None:
+        from specify_cli.bundler import BundlerError
+
+        self.install_calls.append(self._key(component))
+        if self._fail_on is not None and component.id == self._fail_on:
+            raise BundlerError(f"Simulated failure installing {component.id}")
+        self.installed.add(self._key(component))
+
+    def remove(self, project_root: Path, component: ComponentRef) -> None:
+        self.remove_calls.append(self._key(component))
+        self.installed.discard(self._key(component))
+
+    def refresh(self, project_root: Path, component: ComponentRef) -> None:
+        self.refresh_calls.append(self._key(component))
+        self.installed.add(self._key(component))

tests/contract/test_bundle_cli.py

@@ -0,0 +1,391 @@
+"""Contract test for the `specify bundle` CLI surface (Typer integration).
+
+Exercises the wired commands end-to-end via CliRunner against a temp project,
+asserting exit codes and the cross-cutting error guarantees from
+contracts/cli-commands.md (offline, discovery-only refusal, not-a-project error).
+"""
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+import yaml
+from typer.testing import CliRunner
+
+from specify_cli import app
+from specify_cli.bundler.services.packager import build_bundle
+from tests.bundler_helpers import (
+    catalog_entry_dict,
+    valid_manifest_dict,
+    write_catalog_file,
+)
+
+runner = CliRunner()
+
+
+@pytest.fixture()
+def project(tmp_path: Path, monkeypatch) -> Path:
+    (tmp_path / ".specify").mkdir()
+    monkeypatch.chdir(tmp_path)
+    return tmp_path
+
+
+def test_bundle_help_lists_all_commands():
+    result = runner.invoke(app, ["bundle", "--help"])
+    assert result.exit_code == 0
+    for cmd in ("search", "info", "list", "install", "update", "remove",
+                "validate", "build", "init", "catalog"):
+        assert cmd in result.output
+
+
+def test_update_accepts_integration_override():
+    # Update must expose --integration so integration-pinned bundles can be
+    # updated in projects where the active integration can't be auto-detected.
+    # Rich may insert ANSI escapes between the two leading dashes, so match the
+    # un-split option word rather than the literal "--integration".
+    result = runner.invoke(app, ["bundle", "update", "--help"])
+    assert result.exit_code == 0
+    assert "integration" in result.output
+
+
+def test_list_empty_project(project: Path):
+    result = runner.invoke(app, ["bundle", "list"])
+    assert result.exit_code == 0
+    assert "No bundles installed" in result.output
+
+
+def test_commands_outside_project_fail_with_guidance(tmp_path: Path, monkeypatch):
+    monkeypatch.chdir(tmp_path)  # no .specify/
+    result = runner.invoke(app, ["bundle", "list"])
+    assert result.exit_code == 1
+    assert "Spec Kit project" in result.output
+
+
+def test_search_works_without_a_project(tmp_path: Path, monkeypatch):
+    # Discovery commands fall back to the built-in/user catalog stack and must
+    # not require a Spec Kit project (matches README/quickstart examples).
+    monkeypatch.chdir(tmp_path)  # no .specify/
+    result = runner.invoke(app, ["bundle", "search", "--offline", "--json"])
+    assert result.exit_code == 0, result.output
+    assert result.output.strip().startswith("[")
+
+
+def test_info_unknown_bundle_without_project_reports_not_found(tmp_path: Path, monkeypatch):
+    monkeypatch.chdir(tmp_path)  # no .specify/
+    result = runner.invoke(app, ["bundle", "info", "does-not-exist", "--offline"])
+    # Reaches catalog resolution (not the project gate) and reports a clean miss.
+    assert result.exit_code == 1
+    assert "Spec Kit project" not in result.output
+
+
+def test_catalog_list_shows_builtin_defaults(project: Path):
+    result = runner.invoke(app, ["bundle", "catalog", "list"])
+    assert result.exit_code == 0
+    assert "default" in result.output
+    assert "community" in result.output
+    assert "built-in default stack" in result.output
+
+
+def test_catalog_add_and_remove(project: Path):
+    catalog = project / "local-catalog.json"
+    write_catalog_file(catalog, {"demo": catalog_entry_dict("demo")})
+
+    added = runner.invoke(
+        app, ["bundle", "catalog", "add", str(catalog), "--id", "local"]
+    )
+    assert added.exit_code == 0, added.output
+
+    listed = runner.invoke(app, ["bundle", "catalog", "list"])
+    assert "local" in listed.output
+
+    removed = runner.invoke(app, ["bundle", "catalog", "remove", "local"])
+    assert removed.exit_code == 0
+
+
+def test_catalog_remove_builtin_is_refused(project: Path):
+    result = runner.invoke(app, ["bundle", "catalog", "remove", "default"])
+    assert result.exit_code == 1
+    assert "built-in" in result.output
+
+
+def test_validate_reports_invalid_manifest(project: Path):
+    data = valid_manifest_dict()
+    del data["bundle"]["license"]
+    (project / "bundle.yml").write_text(yaml.safe_dump(data), encoding="utf-8")
+    result = runner.invoke(app, ["bundle", "validate"])
+    assert result.exit_code == 1
+    assert "license" in result.output
+
+
+def test_validate_accepts_valid_manifest(project: Path):
+    (project / "bundle.yml").write_text(
+        yaml.safe_dump(valid_manifest_dict()), encoding="utf-8"
+    )
+    # Offline mode does not fail on references it cannot verify (synthetic ids
+    # here); they surface as warnings while structure is confirmed valid.
+    result = runner.invoke(app, ["bundle", "validate", "--offline"])
+    assert result.exit_code == 0, result.output
+    assert "valid" in result.output
+
+
+def test_validate_rejects_broken_reference(project: Path):
+    # Synthetic component ids resolve to nothing in any catalog → hard failure.
+    (project / "bundle.yml").write_text(
+        yaml.safe_dump(valid_manifest_dict()), encoding="utf-8"
+    )
+    result = runner.invoke(app, ["bundle", "validate"])
+    assert result.exit_code == 1
+    assert "preset-a" in result.output or "ext-a" in result.output
+
+
+def test_validate_accepts_bundled_reference(project: Path):
+    data = valid_manifest_dict()
+    data["provides"] = {"extensions": [{"id": "agent-context", "version": "1.0.0"}]}
+    (project / "bundle.yml").write_text(yaml.safe_dump(data), encoding="utf-8")
+    result = runner.invoke(app, ["bundle", "validate"])
+    assert result.exit_code == 0, result.output
+    assert "valid" in result.output
+
+
+def test_build_produces_artifact(project: Path):
+    (project / "bundle.yml").write_text(
+        yaml.safe_dump(valid_manifest_dict()), encoding="utf-8"
+    )
+    (project / "README.md").write_text("# Demo", encoding="utf-8")
+    result = runner.invoke(app, ["bundle", "build", "--output", str(project / "dist")])
+    assert result.exit_code == 0, result.output
+    artifacts = list((project / "dist").glob("*.zip"))
+    assert len(artifacts) == 1
+
+
+def test_info_expands_full_component_set(project: Path):
+    bundle_dir = project / "src-bundle"
+    bundle_dir.mkdir()
+    (bundle_dir / "bundle.yml").write_text(
+        yaml.safe_dump(valid_manifest_dict()), encoding="utf-8"
+    )
+    catalog = project / "local-catalog.json"
+    entry = catalog_entry_dict(
+        "demo-bundle", download_url=str(bundle_dir / "bundle.yml")
+    )
+    write_catalog_file(catalog, {"demo-bundle": entry})
+    added = runner.invoke(
+        app, ["bundle", "catalog", "add", str(catalog), "--id", "local"]
+    )
+    assert added.exit_code == 0, added.output
+
+    result = runner.invoke(app, ["bundle", "info", "demo-bundle", "--json", "--offline"])
+    assert result.exit_code == 0, result.output
+    payload = json.loads(result.output)
+    components = {(c["kind"], c["id"]): c for c in payload["components"]}
+    assert ("extensions", "ext-a") in components
+    preset = components[("presets", "preset-a")]
+    assert preset["version"] == "2.0.0"
+    assert preset["priority"] == 10
+    assert preset["strategy"] == "append"
+    assert payload["trust"] == "verified"
+
+    text = runner.invoke(app, ["bundle", "info", "demo-bundle", "--offline"])
+    assert "preset-a v2.0.0" in text.output
+    assert "Trust" in text.output
+
+
+def test_info_expands_discovery_only_bundle(project: Path):
+    # Discovery-only bundles must still be fully inspectable via `info`;
+    # only `install` is refused for them.
+    bundle_dir = project / "disc-bundle"
+    bundle_dir.mkdir()
+    (bundle_dir / "bundle.yml").write_text(
+        yaml.safe_dump(valid_manifest_dict()), encoding="utf-8"
+    )
+    catalog = project / "disc-catalog.json"
+    entry = catalog_entry_dict(
+        "demo-bundle", download_url=str(bundle_dir / "bundle.yml")
+    )
+    write_catalog_file(catalog, {"demo-bundle": entry})
+    config = {
+        "schema_version": "1.0",
+        "catalogs": [
+            {"id": "disc", "url": str(catalog), "priority": 1,
+             "install_policy": "discovery-only"}
+        ],
+    }
+    (project / ".specify" / "bundle-catalogs.yml").write_text(
+        yaml.safe_dump(config), encoding="utf-8"
+    )
+    result = runner.invoke(app, ["bundle", "info", "demo-bundle", "--json", "--offline"])
+    assert result.exit_code == 0, result.output
+    payload = json.loads(result.output)
+    components = {(c["kind"], c["id"]) for c in payload["components"]}
+    assert ("extensions", "ext-a") in components
+
+
+def test_info_resolves_local_zip_download_url(project: Path):
+    # A local .zip artifact as download_url is extracted to read bundle.yml.
+    bundle_dir = project / "zip-src"
+    bundle_dir.mkdir()
+    (bundle_dir / "bundle.yml").write_text(
+        yaml.safe_dump(valid_manifest_dict()), encoding="utf-8"
+    )
+    (bundle_dir / "README.md").write_text("# Demo", encoding="utf-8")
+    artifact = build_bundle(bundle_dir, output_dir=project / "dist").artifact_path
+    catalog = project / "zip-catalog.json"
+    write_catalog_file(
+        catalog,
+        {"demo-bundle": catalog_entry_dict("demo-bundle", download_url=str(artifact))},
+    )
+    added = runner.invoke(
+        app, ["bundle", "catalog", "add", str(catalog), "--id", "local"]
+    )
+    assert added.exit_code == 0, added.output
+    result = runner.invoke(app, ["bundle", "info", "demo-bundle", "--json", "--offline"])
+    assert result.exit_code == 0, result.output
+    payload = json.loads(result.output)
+    components = {(c["kind"], c["id"]) for c in payload["components"]}
+    assert ("extensions", "ext-a") in components
+
+
+def test_install_refuses_discovery_only_source(project: Path, monkeypatch):
+    # Point a discovery-only catalog at a local payload containing the bundle.
+    catalog = project / "disc.json"
+    write_catalog_file(catalog, {"demo": catalog_entry_dict("demo")})
+    config = {
+        "schema_version": "1.0",
+        "catalogs": [
+            {"id": "disc", "url": str(catalog), "priority": 1,
+             "install_policy": "discovery-only"}
+        ],
+    }
+    (project / ".specify" / "bundle-catalogs.yml").write_text(
+        yaml.safe_dump(config), encoding="utf-8"
+    )
+    result = runner.invoke(app, ["bundle", "install", "demo", "--offline"])
+    assert result.exit_code == 1
+    assert "discovery-only" in result.output
+
+
+def test_update_refuses_discovery_only_source(project: Path):
+    # An installed bundle whose only resolvable source is discovery-only must
+    # not be updatable from there (FR-025), mirroring the install policy gate.
+    from specify_cli.bundler.models.manifest import ComponentRef
+    from specify_cli.bundler.models.records import (
+        InstalledBundleRecord,
+        save_records,
+    )
+
+    save_records(
+        project,
+        [
+            InstalledBundleRecord.create(
+                "demo",
+                "1.0.0",
+                [ComponentRef(kind="extensions", id="ext-a", version=None)],
+            )
+        ],
+    )
+
+    catalog = project / "disc.json"
+    write_catalog_file(catalog, {"demo": catalog_entry_dict("demo")})
+    config = {
+        "schema_version": "1.0",
+        "catalogs": [
+            {"id": "disc", "url": str(catalog), "priority": 1,
+             "install_policy": "discovery-only"}
+        ],
+    }
+    (project / ".specify" / "bundle-catalogs.yml").write_text(
+        yaml.safe_dump(config), encoding="utf-8"
+    )
+
+    result = runner.invoke(app, ["bundle", "update", "demo", "--offline"])
+    assert result.exit_code == 1
+    assert "discovery-only" in result.output
+
+
+def test_info_fails_loudly_when_manifest_unresolvable_offline(project: Path):
+    # `info` must expand the real component set; if the manifest can't be
+    # resolved (here: --offline against an https download_url), it should error
+    # and exit non-zero rather than silently degrading to `provides` counts.
+    catalog = project / "remote-catalog.json"
+    entry = catalog_entry_dict(
+        "demo-bundle", download_url="https://example.com/demo-bundle.zip"
+    )
+    write_catalog_file(catalog, {"demo-bundle": entry})
+    added = runner.invoke(
+        app, ["bundle", "catalog", "add", str(catalog), "--id", "remote"]
+    )
+    assert added.exit_code == 0, added.output
+
+    result = runner.invoke(app, ["bundle", "info", "demo-bundle", "--offline"])
+    assert result.exit_code == 1
+    assert "Network access disabled" in result.output
+
+
+def test_search_json_offline(project: Path):
+    catalog = project / "c.json"
+    write_catalog_file(catalog, {"demo": catalog_entry_dict("demo")})
+    config = {
+        "schema_version": "1.0",
+        "catalogs": [
+            {"id": "c", "url": str(catalog), "priority": 1,
+             "install_policy": "install-allowed"}
+        ],
+    }
+    (project / ".specify" / "bundle-catalogs.yml").write_text(
+        yaml.safe_dump(config), encoding="utf-8"
+    )
+    result = runner.invoke(app, ["bundle", "search", "--offline", "--json"])
+    assert result.exit_code == 0
+    payload = json.loads(result.output)
+    assert payload[0]["id"] == "demo"
+    # Trust indicator is exposed on the discovery surface (FR-010 / FR-027).
+    assert payload[0]["verified"] is True
+    assert payload[0]["trust"] == "verified"
+
+
+def test_search_text_shows_trust(project: Path):
+    catalog = project / "c.json"
+    write_catalog_file(
+        catalog,
+        {
+            "verified-one": catalog_entry_dict("verified-one", verified=True),
+            "community-one": catalog_entry_dict("community-one", verified=False),
+        },
+    )
+    config = {
+        "schema_version": "1.0",
+        "catalogs": [
+            {"id": "c", "url": str(catalog), "priority": 1,
+             "install_policy": "install-allowed"}
+        ],
+    }
+    (project / ".specify" / "bundle-catalogs.yml").write_text(
+        yaml.safe_dump(config), encoding="utf-8"
+    )
+    result = runner.invoke(app, ["bundle", "search", "--offline"])
+    assert result.exit_code == 0, result.output
+    assert "verified" in result.output
+    assert "community" in result.output
+
+
+def test_install_integration_override_cannot_bypass_clash_guard(project: Path):
+    # An initialized project's recorded active integration is authoritative:
+    # passing --integration must not let a differently-pinned bundle install.
+    import json
+
+    (project / ".specify" / "integration.json").write_text(
+        json.dumps({"integration": "copilot"}), encoding="utf-8"
+    )
+    bundle_dir = project / "claude-bundle"
+    bundle_dir.mkdir()
+    data = valid_manifest_dict(integration={"id": "claude"})
+    (bundle_dir / "bundle.yml").write_text(yaml.safe_dump(data), encoding="utf-8")
+    (bundle_dir / "README.md").write_text("# Claude bundle", encoding="utf-8")
+
+    result = runner.invoke(
+        app,
+        ["bundle", "install", str(bundle_dir), "--integration", "claude", "--offline"],
+    )
+    assert result.exit_code == 1
+    assert "claude" in result.output and "copilot" in result.output

tests/contract/test_catalog_schema.py

@@ -0,0 +1,147 @@
+"""Contract tests for the catalog schema and source stack.
+
+Mirrors contracts/bundle-catalog.schema.md: source precedence project > user >
+built-in, install policy gating, payload parsing.
+"""
+from __future__ import annotations
+
+from pathlib import Path
+
+import yaml
+
+from specify_cli.bundler.models.catalog import (
+    BUILTIN_DEFAULT_STACK,
+    CatalogSource,
+    InstallPolicy,
+    Scope,
+    load_catalog_payload,
+    load_source_stack,
+)
+from specify_cli.bundler import BundlerError
+import pytest
+from tests.bundler_helpers import catalog_entry_dict, catalog_payload, make_project
+
+
+def test_non_integer_source_priority_raises_actionable_error():
+    with pytest.raises(BundlerError, match="non-integer priority"):
+        CatalogSource.from_dict(
+            {"id": "corp", "url": "https://corp/catalog.json", "priority": "high"},
+            Scope.PROJECT,
+        )
+
+
+def test_builtin_default_stack_when_no_config(tmp_path: Path):
+    make_project(tmp_path)
+    sources = load_source_stack(tmp_path)
+    ids = [s.id for s in sources]
+    assert ids == ["default", "community"]
+    assert sources[0].install_policy is InstallPolicy.INSTALL_ALLOWED
+    assert sources[1].install_policy is InstallPolicy.DISCOVERY_ONLY
+    assert all(s.scope is Scope.BUILTIN for s in sources)
+
+
+def test_project_config_overrides_same_id(tmp_path: Path):
+    make_project(tmp_path)
+    config = {
+        "schema_version": "1.0",
+        "catalogs": [
+            {"id": "default", "url": "file://local", "priority": 1,
+             "install_policy": "install-allowed"},
+            {"id": "corp", "url": "https://corp/catalog.json", "priority": 0,
+             "install_policy": "install-allowed"},
+        ],
+    }
+    (tmp_path / ".specify" / "bundle-catalogs.yml").write_text(
+        yaml.safe_dump(config), encoding="utf-8"
+    )
+    sources = load_source_stack(tmp_path)
+    by_id = {s.id: s for s in sources}
+    assert by_id["default"].scope is Scope.PROJECT
+    assert by_id["default"].url == "file://local"
+    # Highest precedence (lowest priority number) sorts first.
+    assert sources[0].id == "corp"
+
+
+def test_user_scope_between_builtin_and_project(tmp_path: Path):
+    make_project(tmp_path)
+    user_dir = tmp_path / "userconf"
+    user_dir.mkdir()
+    (user_dir / "bundle-catalogs.yml").write_text(
+        yaml.safe_dump(
+            {"catalogs": [
+                {"id": "community", "url": "https://u", "priority": 2,
+                 "install_policy": "install-allowed"}
+            ]}
+        ),
+        encoding="utf-8",
+    )
+    sources = load_source_stack(tmp_path, user_config_dir=user_dir)
+    by_id = {s.id: s for s in sources}
+    # User overrode the built-in community policy to install-allowed.
+    assert by_id["community"].scope is Scope.USER
+    assert by_id["community"].install_allowed is True
+
+
+def test_load_payload_parses_entries():
+    payload = catalog_payload({"demo-bundle": catalog_entry_dict()})
+    entries = load_catalog_payload(payload)
+    assert "demo-bundle" in entries
+    assert entries["demo-bundle"].version == "1.2.0"
+    assert entries["demo-bundle"].provides["presets"] == 1
+
+
+def test_builtin_default_stack_constant_shape():
+    ids = {raw["id"] for raw in BUILTIN_DEFAULT_STACK}
+    assert ids == {"default", "community"}
+
+
+def test_catalog_entry_rejects_string_tags():
+    from specify_cli.bundler.models.catalog import CatalogEntry
+
+    data = catalog_entry_dict("demo")
+    data["tags"] = "not-a-list"
+    with pytest.raises(BundlerError, match="'tags' must be a list"):
+        CatalogEntry.from_dict(data)
+
+
+def test_catalog_entry_rejects_non_boolean_verified():
+    from specify_cli.bundler.models.catalog import CatalogEntry
+
+    data = catalog_entry_dict("demo")
+    data["verified"] = "false"  # truthy string must not mark the entry verified
+    with pytest.raises(BundlerError, match="'verified' must be a boolean"):
+        CatalogEntry.from_dict(data)
+
+
+def test_load_payload_rejects_id_key_mismatch():
+    # The enclosing key is authoritative; an entry whose own id disagrees with
+    # the key must be rejected so a catalog can't list a spoofed/unresolvable id.
+    payload = catalog_payload({"demo-bundle": catalog_entry_dict("other-id")})
+    with pytest.raises(BundlerError, match="id mismatch"):
+        load_catalog_payload(payload)
+
+
+def test_load_payload_rejects_missing_entry_id():
+    entry = catalog_entry_dict("demo-bundle")
+    entry["id"] = ""
+    payload = catalog_payload({"demo-bundle": entry})
+    with pytest.raises(BundlerError, match="missing its 'id'"):
+        load_catalog_payload(payload)
+
+
+def test_catalog_entry_rejects_non_mapping_requires():
+    from specify_cli.bundler.models.catalog import CatalogEntry
+
+    data = catalog_entry_dict("demo")
+    data["requires"] = "speckit>=0.1"
+    with pytest.raises(BundlerError, match="'requires' must be a mapping"):
+        CatalogEntry.from_dict(data)
+
+
+def test_catalog_entry_rejects_non_mapping_provides():
+    from specify_cli.bundler.models.catalog import CatalogEntry
+
+    data = catalog_entry_dict("demo")
+    data["provides"] = "extensions"
+    with pytest.raises(BundlerError, match="'provides' must be a mapping"):
+        CatalogEntry.from_dict(data)

tests/contract/test_manifest_schema.py

@@ -0,0 +1,126 @@
+"""Contract tests for the bundle manifest schema (bundle.yml).
+
+Mirrors contracts/bundle-manifest.schema.md: required identity/metadata fields,
+semver pinning of components, preset priority+strategy, integration optionality.
+"""
+from __future__ import annotations
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.models.manifest import BundleManifest
+from tests.bundler_helpers import valid_manifest_dict
+
+
+def test_valid_manifest_has_no_structural_errors():
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    assert manifest.structural_errors() == []
+    assert manifest.bundle.id == "demo-bundle"
+    assert manifest.is_agnostic() is True
+
+
+def test_missing_required_field_is_reported_by_name():
+    data = valid_manifest_dict()
+    del data["bundle"]["license"]
+    errors = BundleManifest.from_dict(data).structural_errors()
+    assert any("bundle.license" in e for e in errors)
+
+
+def test_unsupported_schema_version_is_rejected():
+    data = valid_manifest_dict(schema_version="9.9")
+    errors = BundleManifest.from_dict(data).structural_errors()
+    assert any("schema_version" in e for e in errors)
+
+
+def test_non_semver_bundle_version_is_rejected():
+    data = valid_manifest_dict()
+    data["bundle"]["version"] = "not-a-version"
+    errors = BundleManifest.from_dict(data).structural_errors()
+    assert any("semver" in e for e in errors)
+
+
+def test_preset_requires_priority_and_strategy():
+    data = valid_manifest_dict()
+    data["provides"]["presets"] = [{"id": "p", "version": "1.0.0"}]
+    errors = BundleManifest.from_dict(data).structural_errors()
+    assert any("priority" in e for e in errors)
+    assert any("strategy" in e for e in errors)
+
+
+def test_invalid_preset_strategy_is_rejected():
+    data = valid_manifest_dict()
+    data["provides"]["presets"][0]["strategy"] = "merge"
+    errors = BundleManifest.from_dict(data).structural_errors()
+    assert any("strategy" in e for e in errors)
+
+
+def test_non_integer_priority_raises_actionable_error():
+    data = valid_manifest_dict()
+    data["provides"]["presets"][0]["priority"] = "high"
+    with pytest.raises(BundlerError, match="priority must be an integer"):
+        BundleManifest.from_dict(data)
+
+
+def test_non_step_components_must_be_pinned():
+    data = valid_manifest_dict()
+    data["provides"]["extensions"] = [{"id": "ext-unpinned"}]
+    errors = BundleManifest.from_dict(data).structural_errors()
+    assert any("must be pinned" in e for e in errors)
+
+
+def test_steps_may_be_unpinned():
+    data = valid_manifest_dict()
+    data["provides"]["steps"] = [{"id": "step-x"}]
+    manifest = BundleManifest.from_dict(data)
+    assert manifest.structural_errors() == []
+
+
+def test_integration_makes_bundle_non_agnostic():
+    data = valid_manifest_dict(integration={"id": "copilot"})
+    manifest = BundleManifest.from_dict(data)
+    assert manifest.is_agnostic() is False
+    assert manifest.integration.id == "copilot"
+
+
+def test_components_property_orders_by_kind():
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    kinds = [c.kind for c in manifest.components]
+    assert kinds == ["extensions", "presets", "steps", "workflows"]
+
+
+def test_string_tags_rejected_not_split_per_character():
+    # A bare string would otherwise be iterated character-by-character; the
+    # schema requires a list of strings.
+    data = valid_manifest_dict()
+    data["tags"] = "security"
+    with pytest.raises(BundlerError, match="'tags' must be a list of strings"):
+        BundleManifest.from_dict(data)
+
+
+def test_unsafe_bundle_id_flagged_by_structural_validation():
+    data = valid_manifest_dict()
+    data["bundle"]["id"] = "../evil"
+    manifest = BundleManifest.from_dict(data)
+    errors = manifest.structural_errors()
+    assert any("bundle.id" in e and "slug" in e for e in errors)
+
+
+def test_valid_slug_bundle_id_passes():
+    data = valid_manifest_dict()
+    data["bundle"]["id"] = "team-a.bundle_1"
+    manifest = BundleManifest.from_dict(data)
+    assert not any("bundle.id" in e for e in manifest.structural_errors())
+
+
+def test_string_tools_rejected_not_split_per_character():
+    data = valid_manifest_dict()
+    data["requires"]["tools"] = "docker"
+    with pytest.raises(BundlerError, match="'requires.tools' must be a list of strings"):
+        BundleManifest.from_dict(data)
+
+
+def test_string_mcp_rejected_not_split_per_character():
+    data = valid_manifest_dict()
+    data["requires"]["mcp"] = "github"
+    with pytest.raises(BundlerError, match="'requires.mcp' must be a list of strings"):
+        BundleManifest.from_dict(data)

tests/integration/test_bundler_catalog_stack.py

@@ -0,0 +1,79 @@
+"""Integration tests for the catalog stack: precedence, policy gating, search."""
+from __future__ import annotations
+
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.models.catalog import CatalogSource, InstallPolicy, Scope
+from specify_cli.bundler.services.catalog_stack import CatalogStack
+from tests.bundler_helpers import catalog_entry_dict, catalog_payload
+
+
+def _source(source_id, priority, policy, url="builtin://x"):
+    return CatalogSource(
+        id=source_id, url=url, priority=priority,
+        install_policy=InstallPolicy(policy), scope=Scope.PROJECT,
+    )
+
+
+def _stack(sources, payloads):
+    def fetcher(src):
+        return payloads[src.id]
+    return CatalogStack(sources, fetcher)
+
+
+def test_resolve_prefers_highest_precedence_source():
+    sources = [
+        _source("low", 2, "install-allowed"),
+        _source("high", 1, "discovery-only"),
+    ]
+    payloads = {
+        "high": catalog_payload({"b": catalog_entry_dict("b", version="9.0.0")}),
+        "low": catalog_payload({"b": catalog_entry_dict("b", version="1.0.0")}),
+    }
+    resolved = _stack(sources, payloads).resolve("b")
+    assert resolved.source.id == "high"
+    assert resolved.entry.version == "9.0.0"
+    assert resolved.install_allowed is False
+
+
+def test_resolve_unknown_bundle_errors():
+    stack = _stack(
+        [_source("only", 1, "install-allowed")],
+        {"only": catalog_payload({})},
+    )
+    with pytest.raises(BundlerError, match="not found"):
+        stack.resolve("missing")
+
+
+def test_search_dedupes_by_precedence_and_filters():
+    sources = [_source("a", 1, "install-allowed"), _source("b", 2, "install-allowed")]
+    payloads = {
+        "a": catalog_payload({
+            "alpha": catalog_entry_dict("alpha", role="developer"),
+        }),
+        "b": catalog_payload({
+            "alpha": catalog_entry_dict("alpha", version="0.0.1"),
+            "beta": catalog_entry_dict("beta", role="qa"),
+        }),
+    }
+    stack = _stack(sources, payloads)
+
+    all_results = stack.search()
+    ids = [r.entry.id for r in all_results]
+    assert ids == ["alpha", "beta"]
+    # alpha resolved from the higher-precedence source 'a'.
+    alpha = next(r for r in all_results if r.entry.id == "alpha")
+    assert alpha.source.id == "a"
+
+    qa_only = stack.search("qa")
+    assert [r.entry.id for r in qa_only] == ["beta"]
+
+
+def test_unreachable_source_raises_named_error():
+    def fetcher(src):
+        raise RuntimeError("boom")
+    stack = CatalogStack([_source("bad", 1, "install-allowed")], fetcher)
+    with pytest.raises(BundlerError, match="bad"):
+        stack.resolve("anything")

tests/integration/test_bundler_init_install.py

@@ -0,0 +1,92 @@
+"""Install-time initialization and integration precedence (T049, T050).
+
+``specify bundle install`` into an uninitialized directory must scaffold a Spec
+Kit project first (FR-012), choosing the integration by precedence (FR-013):
+explicit ``--integration`` override → bundle-declared integration → default.
+The end-to-end test runs fully offline against bundled assets.
+"""
+from __future__ import annotations
+
+import json
+import os
+from pathlib import Path
+
+import yaml
+from typer.testing import CliRunner
+
+from specify_cli import app
+from specify_cli.bundler.models.manifest import BundleManifest
+from specify_cli.commands.bundle import _resolve_init_integration
+from specify_cli.bundler.services.packager import build_bundle
+from tests.bundler_helpers import valid_manifest_dict
+
+runner = CliRunner()
+
+
+def _manifest(**overrides):
+    data = valid_manifest_dict(**overrides)
+    return BundleManifest.from_dict(data)
+
+
+def test_precedence_override_wins():
+    manifest = _manifest(integration={"id": "claude"})
+    assert _resolve_init_integration("gemini", manifest) == "gemini"
+
+
+def test_precedence_bundle_declared_when_no_override():
+    manifest = _manifest(integration={"id": "claude"})
+    assert _resolve_init_integration(None, manifest) == "claude"
+
+
+def test_precedence_default_when_unspecified():
+    manifest = _manifest()
+    assert _resolve_init_integration(None, manifest) == "copilot"
+    assert _resolve_init_integration(None, None) == "copilot"
+
+
+def _build_mini(tmp_path: Path) -> Path:
+    bundle = tmp_path / "mini"
+    bundle.mkdir()
+    (bundle / "bundle.yml").write_text(
+        yaml.safe_dump(
+            {
+                "schema_version": "1.0",
+                "bundle": {
+                    "id": "mini",
+                    "name": "Mini",
+                    "version": "1.0.0",
+                    "role": "developer",
+                    "description": "minimal",
+                    "author": "tests",
+                    "license": "MIT",
+                },
+                "requires": {"speckit_version": ">=0.1.0"},
+                "provides": {"extensions": [{"id": "agent-context", "version": "1.0.0"}]},
+            }
+        ),
+        encoding="utf-8",
+    )
+    (bundle / "README.md").write_text("# Mini\n", encoding="utf-8")
+    return build_bundle(bundle).artifact_path
+
+
+def test_install_initializes_uninitialized_project(tmp_path: Path):
+    project = tmp_path / "proj"
+    project.mkdir()
+    artifact = _build_mini(tmp_path)
+
+    previous = Path.cwd()
+    os.chdir(project)
+    try:
+        result = runner.invoke(
+            app, ["bundle", "install", str(artifact), "--offline"]
+        )
+        assert result.exit_code == 0, result.output
+    finally:
+        os.chdir(previous)
+
+    assert (project / ".specify").is_dir()
+    marker = project / ".specify" / "integration.json"
+    assert marker.exists()
+    data = json.loads(marker.read_text(encoding="utf-8"))
+    assert "copilot" in json.dumps(data)

tests/integration/test_bundler_install_flow.py

@@ -0,0 +1,222 @@
+"""Integration tests for the install → record → remove lifecycle (offline, fake installer).
+
+Uses :class:`FakeInstaller` so no network or real primitive machinery is touched
+(Constitution Principle II network-mocking, Principle IV offline-first).
+"""
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.models.manifest import BundleManifest
+from specify_cli.bundler.models.records import load_records
+from specify_cli.bundler.services.installer import install_bundle, remove_bundle
+from specify_cli.bundler.services.resolver import resolve_install_plan
+from tests.bundler_helpers import FakeInstaller, make_project, valid_manifest_dict
+
+
+def _plan(manifest):
+    return resolve_install_plan(
+        manifest, speckit_version="0.11.2", active_integration="copilot"
+    )
+
+
+def test_install_records_and_invokes_primitives(tmp_path: Path):
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    installer = FakeInstaller()
+
+    result = install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+
+    assert len(result.installed) == 4
+    assert len(installer.install_calls) == 4
+    records = load_records(tmp_path)
+    assert len(records) == 1
+    assert records[0].bundle_id == "demo-bundle"
+
+
+def test_install_is_idempotent(tmp_path: Path):
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    installer = FakeInstaller()
+
+    install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+    second = install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+
+    # Second install adds nothing and does not duplicate the record.
+    assert second.installed == []
+    assert len(second.skipped) == 4
+    assert len(load_records(tmp_path)) == 1
+
+
+def test_partial_failure_rolls_back_and_records_nothing(tmp_path: Path):
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    installer = FakeInstaller(fail_on="preset-a")
+
+    with pytest.raises(BundlerError):
+        install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+
+    # ext-a was installed first, then rolled back; no record persisted.
+    assert installer.installed == set()
+    assert load_records(tmp_path) == []
+
+
+def test_remove_is_non_collateral(tmp_path: Path):
+    make_project(tmp_path)
+    installer = FakeInstaller()
+
+    # Bundle A provides a shared preset; Bundle B also provides it.
+    data_a = valid_manifest_dict()
+    data_a["bundle"]["id"] = "a"
+    data_b = valid_manifest_dict()
+    data_b["bundle"]["id"] = "b"
+    data_b["provides"] = {"presets": [
+        {"id": "preset-a", "version": "2.0.0", "priority": 10, "strategy": "append"}
+    ]}
+
+    man_a = BundleManifest.from_dict(data_a)
+    man_b = BundleManifest.from_dict(data_b)
+    install_bundle(tmp_path, _plan(man_a), installer, manifest=man_a)
+    install_bundle(tmp_path, _plan(man_b), installer, manifest=man_b)
+
+    # Removing B must NOT uninstall preset-a (still needed by A).
+    result = remove_bundle(tmp_path, "b", installer)
+    assert ("presets", "preset-a") in {(c.kind, c.id) for c in result.skipped}
+    assert installer.is_installed(tmp_path, man_a.presets[0]) is True
+
+    remaining = {r.bundle_id for r in load_records(tmp_path)}
+    assert remaining == {"a"}
+
+
+def test_remove_unknown_bundle_errors(tmp_path: Path):
+    make_project(tmp_path)
+    with pytest.raises(BundlerError, match="not installed"):
+        remove_bundle(tmp_path, "ghost", FakeInstaller())
+
+
+def test_remove_reports_uninstalled_not_installed(tmp_path: Path):
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    installer = FakeInstaller()
+    install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+
+    result = remove_bundle(tmp_path, "demo-bundle", installer)
+
+    # Removal flows populate the dedicated ``uninstalled`` list; ``installed``
+    # stays empty so the result type is never ambiguous for callers.
+    assert result.installed == []
+    assert len(result.uninstalled) == 4
+    assert installer.installed == set()
+
+
+def test_remove_counts_only_components_actually_removed(tmp_path: Path):
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    installer = FakeInstaller()
+    install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+
+    # Simulate one contributed component already gone from disk (e.g. removed
+    # out of band). It must not be reported as uninstalled and remove() must
+    # not be called for it.
+    gone = manifest.components[0]
+    installer.installed.discard((gone.kind, gone.id))
+
+    result = remove_bundle(tmp_path, "demo-bundle", installer)
+
+    assert len(result.uninstalled) == 3
+    assert (gone.kind, gone.id) not in installer.remove_calls
+    assert gone in result.skipped
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    installer = FakeInstaller()
+
+    install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+    result = install_bundle(
+        tmp_path, _plan(manifest), installer, manifest=manifest, refresh=True
+    )
+
+    # With refresh, already-installed components are re-applied, not skipped.
+    assert result.skipped == []
+    assert len(result.refreshed) == 4
+    assert len(installer.refresh_calls) == 4
+    assert result.changed is True
+
+
+def test_refresh_falls_back_to_install_without_hook(tmp_path: Path):
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+
+    class NoRefreshInstaller(FakeInstaller):
+        refresh = None  # type: ignore[assignment]
+
+    installer = NoRefreshInstaller()
+    install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+    before = len(installer.install_calls)
+    result = install_bundle(
+        tmp_path, _plan(manifest), installer, manifest=manifest, refresh=True
+    )
+
+    # No refresh hook → re-install path keeps components current.
+    assert len(result.refreshed) == 4
+    assert len(installer.install_calls) == before + 4
+
+
+def test_update_preserves_original_installed_at(tmp_path: Path):
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    installer = FakeInstaller()
+    install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+
+    original = load_records(tmp_path)[0].installed_at
+
+    # A refresh (bundle update) must not rewrite the original install timestamp.
+    install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest, refresh=True)
+
+    assert load_records(tmp_path)[0].installed_at == original
+
+
+def test_refresh_does_not_touch_independently_installed_component(tmp_path: Path):
+    # bundle update (refresh) must not re-apply a component installed
+    # independently and tracked by no bundle — refreshing it would be a
+    # collateral change to something the bundle does not own (FR-022).
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    installer = FakeInstaller()
+    installer.installed.add(("extensions", "ext-a"))
+
+    result = install_bundle(
+        tmp_path, _plan(manifest), installer, manifest=manifest, refresh=True
+    )
+
+    # ext-a is skipped (not refreshed) and never attributed to the bundle.
+    assert ("extensions", "ext-a") not in installer.refresh_calls
+    assert ("extensions", "ext-a") in {(c.kind, c.id) for c in result.skipped}
+    assert ("extensions", "ext-a") not in {(c.kind, c.id) for c in result.refreshed}
+    contributed = {
+        (c.kind, c.id) for c in load_records(tmp_path)[0].contributed_components
+    }
+    assert ("extensions", "ext-a") not in contributed
+
+
+def test_pre_existing_component_is_not_attributed_or_removed(tmp_path: Path):
+    # A component installed independently (before any bundle) must not be
+    # attributed to the bundle, so removing the bundle never uninstalls it
+    # (FR-022, no collateral removal).
+    make_project(tmp_path)
+    manifest = BundleManifest.from_dict(valid_manifest_dict())
+    installer = FakeInstaller()
+    # Pre-install ext-a independently — no bundle record references it yet.
+    installer.installed.add(("extensions", "ext-a"))
+
+    install_bundle(tmp_path, _plan(manifest), installer, manifest=manifest)
+
+    contributed = {
+        (c.kind, c.id) for c in load_records(tmp_path)[0].contributed_components
+    }
+    assert ("extensions", "ext-a") not in contributed
+
+    remove_bundle(tmp_path, "demo-bundle", installer)
+    assert ("extensions", "ext-a") in installer.installed

tests/integration/test_bundler_local_install.py

@@ -0,0 +1,114 @@
+"""Tests for installing a bundle from a local artifact/path (T045).
+
+The resolution-level tests are pure; the end-to-end test installs the bundled
+``agent-context`` extension fully offline from a built ``.zip`` artifact,
+proving the real in-process primitive dispatch (T044) works without a network.
+"""
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+import pytest
+import yaml
+from typer.testing import CliRunner
+
+from specify_cli import app
+from specify_cli.bundler import BundlerError
+from specify_cli.commands.bundle import _local_manifest_source
+from tests.bundler_helpers import make_project, valid_manifest_dict, write_manifest
+
+
+def test_local_source_none_for_non_path():
+    assert _local_manifest_source("some-catalog-bundle-id") is None
+
+
+def test_local_source_from_directory(tmp_path: Path):
+    write_manifest(tmp_path, valid_manifest_dict())
+    manifest = _local_manifest_source(str(tmp_path))
+    assert manifest is not None
+    assert manifest.bundle.id == "demo-bundle"
+
+
+def test_local_source_from_bundle_yml(tmp_path: Path):
+    path = write_manifest(tmp_path, valid_manifest_dict())
+    manifest = _local_manifest_source(str(path))
+    assert manifest is not None
+    assert manifest.bundle.id == "demo-bundle"
+
+
+def test_local_source_from_zip_artifact(tmp_path: Path):
+    bundle_dir = tmp_path / "bundle"
+    bundle_dir.mkdir()
+    write_manifest(bundle_dir, valid_manifest_dict())
+    (bundle_dir / "README.md").write_text("# demo\n", encoding="utf-8")
+
+    runner = CliRunner()
+    result = runner.invoke(app, ["bundle", "build", "--path", str(bundle_dir)])
+    assert result.exit_code == 0, result.output
+    artifact = next(bundle_dir.glob("*.zip"))
+
+    manifest = _local_manifest_source(str(artifact))
+    assert manifest is not None
+    assert manifest.bundle.id == "demo-bundle"
+
+
+def test_local_source_rejects_unknown_file(tmp_path: Path):
+    weird = tmp_path / "thing.txt"
+    weird.write_text("nope", encoding="utf-8")
+    with pytest.raises(BundlerError, match="not a recognised bundle source"):
+        _local_manifest_source(str(weird))
+
+
+def test_install_bundled_extension_from_zip_offline(tmp_path: Path):
+    """End-to-end: build → install (offline, local .zip) → list → remove."""
+    project = make_project(tmp_path / "proj")
+
+    bundle_dir = tmp_path / "mini"
+    bundle_dir.mkdir()
+    (bundle_dir / "bundle.yml").write_text(
+        yaml.safe_dump(
+            {
+                "schema_version": "1.0",
+                "bundle": {
+                    "id": "mini",
+                    "name": "Mini",
+                    "version": "1.0.0",
+                    "role": "developer",
+                    "description": "minimal",
+                    "author": "tests",
+                    "license": "MIT",
+                },
+                "requires": {"speckit_version": ">=0.1.0"},
+                "provides": {
+                    "extensions": [{"id": "agent-context", "version": "1.0.0"}]
+                },
+            }
+        ),
+        encoding="utf-8",
+    )
+    (bundle_dir / "README.md").write_text("# Mini\n", encoding="utf-8")
+
+    runner = CliRunner()
+    previous = Path.cwd()
+    os.chdir(project)
+    try:
+        build = runner.invoke(app, ["bundle", "build", "--path", str(bundle_dir)])
+        assert build.exit_code == 0, build.output
+        artifact = next(bundle_dir.glob("*.zip"))
+
+        install = runner.invoke(app, ["bundle", "install", str(artifact), "--offline"])
+        assert install.exit_code == 0, install.output
+
+        from specify_cli.extensions import ExtensionManager
+
+        assert ExtensionManager(project).registry.is_installed("agent-context")
+
+        listing = runner.invoke(app, ["bundle", "list"])
+        assert "mini" in listing.output
+
+        remove = runner.invoke(app, ["bundle", "remove", "mini"])
+        assert remove.exit_code == 0, remove.output
+        assert not ExtensionManager(project).registry.is_installed("agent-context")
+    finally:
+        os.chdir(previous)

tests/integration/test_bundler_offline.py

@@ -0,0 +1,78 @@
+"""Offline-first tests (Constitution Principle IV).
+
+Assert that consume/author flows work with no network access: built-in catalogs
+resolve offline, file:// catalogs resolve offline, and http(s) sources are
+refused (never silently attempted) when network is disabled.
+"""
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.models.catalog import CatalogSource, InstallPolicy, Scope
+from specify_cli.bundler.services.adapters import make_catalog_fetcher
+from specify_cli.bundler.services.catalog_stack import CatalogStack
+from tests.bundler_helpers import catalog_entry_dict, write_catalog_file
+
+
+def _src(source_id, url, priority=1, policy="install-allowed"):
+    return CatalogSource(
+        id=source_id, url=url, priority=priority,
+        install_policy=InstallPolicy(policy), scope=Scope.PROJECT,
+    )
+
+
+def test_builtin_catalog_resolves_offline():
+    fetcher = make_catalog_fetcher(allow_network=False)
+    stack = CatalogStack([_src("default", "builtin://default")], fetcher)
+    # Built-in default ships empty; search works without network and returns [].
+    assert stack.search() == []
+
+
+def test_file_catalog_resolves_offline(tmp_path: Path):
+    catalog_path = tmp_path / "catalog.json"
+    write_catalog_file(catalog_path, {"demo": catalog_entry_dict("demo")})
+    fetcher = make_catalog_fetcher(allow_network=False)
+    stack = CatalogStack([_src("local", str(catalog_path))], fetcher)
+    resolved = stack.resolve("demo")
+    assert resolved.entry.id == "demo"
+
+
+def test_http_source_refused_when_offline():
+    fetcher = make_catalog_fetcher(allow_network=False)
+    stack = CatalogStack([_src("remote", "https://example.com/catalog.json")], fetcher)
+    with pytest.raises(BundlerError, match="Network access disabled"):
+        stack.resolve("anything")
+
+
+def test_missing_file_catalog_errors_offline(tmp_path: Path):
+    fetcher = make_catalog_fetcher(allow_network=False)
+    stack = CatalogStack([_src("local", str(tmp_path / "nope.json"))], fetcher)
+    with pytest.raises(BundlerError):
+        stack.resolve("anything")
+
+
+def test_file_url_catalog_resolves_offline(tmp_path: Path):
+    catalog_path = tmp_path / "catalog.json"
+    write_catalog_file(catalog_path, {"demo": catalog_entry_dict("demo")})
+    fetcher = make_catalog_fetcher(allow_network=False)
+    stack = CatalogStack([_src("local", catalog_path.as_uri())], fetcher)
+    resolved = stack.resolve("demo")
+    assert resolved.entry.id == "demo"
+
+
+def test_plain_http_remote_rejected_before_network():
+    # HTTPS is required for non-localhost catalogs; reject http:// up front.
+    fetcher = make_catalog_fetcher(allow_network=True)
+    stack = CatalogStack([_src("remote", "http://example.com/catalog.json")], fetcher)
+    with pytest.raises(BundlerError, match="must use HTTPS"):
+        stack.resolve("anything")
+
+
+def test_remote_url_without_host_rejected():
+    fetcher = make_catalog_fetcher(allow_network=True)
+    stack = CatalogStack([_src("remote", "https:///catalog.json")], fetcher)
+    with pytest.raises(BundlerError, match="valid URL with a host"):
+        stack.resolve("anything")

tests/integration/test_bundler_security_paths.py

@@ -0,0 +1,173 @@
+"""Security tests: path-traversal / symlink confinement (Constitution Principle V).
+
+These assert the bundler refuses to read or write outside an allowed root, so a
+malicious manifest or artifact path cannot escape the project/bundle directory.
+"""
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.lib.yamlio import ensure_within, is_safe_relpath
+
+
+def test_ensure_within_allows_child(tmp_path: Path):
+    root = tmp_path / "bundle"
+    root.mkdir()
+    child = root / "sub" / "file.txt"
+    assert ensure_within(root, child) == child.resolve()
+
+
+def test_ensure_within_rejects_parent_traversal(tmp_path: Path):
+    root = tmp_path / "bundle"
+    root.mkdir()
+    escape = root / ".." / "secret.txt"
+    with pytest.raises(BundlerError, match="escapes"):
+        ensure_within(root, escape)
+
+
+def test_ensure_within_rejects_absolute_outside(tmp_path: Path):
+    root = tmp_path / "bundle"
+    root.mkdir()
+    with pytest.raises(BundlerError):
+        ensure_within(root, Path("/etc/passwd"))
+
+
+@pytest.mark.skipif(os.name == "nt", reason="symlink semantics differ on Windows")
+def test_ensure_within_rejects_symlink_escape(tmp_path: Path):
+    root = tmp_path / "bundle"
+    root.mkdir()
+    outside = tmp_path / "outside.txt"
+    outside.write_text("secret", encoding="utf-8")
+    link = root / "link.txt"
+    link.symlink_to(outside)
+    with pytest.raises(BundlerError, match="escapes"):
+        ensure_within(root, link)
+
+
+@pytest.mark.parametrize("rel,safe", [
+    ("a/b.txt", True),
+    ("./a.txt", True),
+    ("../escape", False),
+    ("a/../../escape", False),
+    ("/abs", False),
+    ("C:/abs", False),
+    ("C:\\abs", False),
+    ("\\\\server\\share", False),
+    ("", False),
+])
+def test_is_safe_relpath(rel, safe):
+    assert is_safe_relpath(rel) is safe
+
+
+def test_build_skips_symlinks(tmp_path: Path):
+    """Packager must not follow symlinks out of the bundle dir."""
+    import yaml
+
+    from specify_cli.bundler.services.packager import build_bundle
+    from tests.bundler_helpers import valid_manifest_dict
+
+    bundle = tmp_path / "bundle"
+    bundle.mkdir()
+    (bundle / "bundle.yml").write_text(
+        yaml.safe_dump(valid_manifest_dict()), encoding="utf-8"
+    )
+    (bundle / "README.md").write_text("# Demo", encoding="utf-8")
+
+    if os.name != "nt":
+        secret = tmp_path / "secret.txt"
+        secret.write_text("top secret", encoding="utf-8")
+        (bundle / "leak.txt").symlink_to(secret)
+
+    result = build_bundle(bundle, output_dir=tmp_path / "out")
+    import zipfile
+
+    with zipfile.ZipFile(result.artifact_path) as archive:
+        names = archive.namelist()
+    assert "leak.txt" not in names
+    assert "bundle.yml" in names
+
+
+def test_load_records_refuses_symlinked_specify_escape(tmp_path: Path):
+    # Reading bundle-records.json must honour the same confinement as writes:
+    # a symlinked .specify pointing outside project_root is refused.
+    from specify_cli.bundler.models.records import load_records
+
+    project = tmp_path / "proj"
+    project.mkdir()
+    outside = tmp_path / "outside"
+    outside.mkdir()
+    (outside / "bundle-records.json").write_text(
+        '{"schema_version": "1.0", "bundles": []}', encoding="utf-8"
+    )
+    (project / ".specify").symlink_to(outside, target_is_directory=True)
+
+    with pytest.raises(BundlerError, match="escapes the allowed root"):
+        load_records(project)
+
+
+def test_active_integration_refuses_symlinked_specify_escape(tmp_path: Path):
+    # Reading the integration marker must not follow a .specify symlink that
+    # resolves outside project_root; an escape is treated as "not determinable".
+    from specify_cli.bundler.lib.project import active_integration
+
+    project = tmp_path / "proj"
+    project.mkdir()
+    outside = tmp_path / "outside"
+    outside.mkdir()
+    (outside / "integration.json").write_text(
+        '{"integration": "leaked"}', encoding="utf-8"
+    )
+    (project / ".specify").symlink_to(outside, target_is_directory=True)
+
+    assert active_integration(project) is None
+
+
+def test_read_catalog_config_refuses_symlinked_specify_escape(tmp_path: Path):
+    from specify_cli.bundler.commands_impl import catalog_config as cc
+
+    project = tmp_path / "proj"
+    project.mkdir()
+    outside = tmp_path / "outside"
+    outside.mkdir()
+    (outside / "bundle-catalogs.yml").write_text(
+        "schema_version: '1.0'\ncatalogs: []\n", encoding="utf-8"
+    )
+    (project / ".specify").symlink_to(outside, target_is_directory=True)
+
+    with pytest.raises(BundlerError, match="escapes the allowed root"):
+        cc._read(project)
+
+
+def test_load_source_stack_refuses_symlinked_specify_dir(tmp_path: Path):
+    from specify_cli.bundler.models.catalog import load_source_stack
+
+    project = tmp_path / "project"
+    project.mkdir()
+    outside = tmp_path / "outside"
+    outside.mkdir()
+    (outside / "bundle-catalogs.yml").write_text("catalogs: []\n", encoding="utf-8")
+    try:
+        (project / ".specify").symlink_to(outside, target_is_directory=True)
+    except (OSError, NotImplementedError):
+        pytest.skip("symlinks not supported on this platform")
+    with pytest.raises(BundlerError, match="escapes the allowed root"):
+        load_source_stack(project)
+
+
+def test_find_project_root_ignores_symlinked_specify(tmp_path: Path):
+    from specify_cli.bundler.lib.project import find_project_root
+
+    real = tmp_path / "real-specify"
+    real.mkdir()
+    project = tmp_path / "project"
+    project.mkdir()
+    try:
+        (project / ".specify").symlink_to(real, target_is_directory=True)
+    except (OSError, NotImplementedError):
+        pytest.skip("symlinks not supported on this platform")
+    # A symlinked .specify must not be accepted as a project root.
+    assert find_project_root(project) is None

tests/unit/test_bundler_adapters.py

@@ -0,0 +1,71 @@
+"""Unit tests for catalog-fetch adapters (auth + redirect safety)."""
+from __future__ import annotations
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.models.catalog import CatalogSource, InstallPolicy
+from specify_cli.bundler.services import adapters
+
+
+def _source(url: str) -> CatalogSource:
+    return CatalogSource(
+        id="team",
+        url=url,
+        priority=10,
+        install_policy=InstallPolicy.INSTALL_ALLOWED,
+    )
+
+
+class _FakeResponse:
+    def __init__(self, body: bytes, final_url: str) -> None:
+        self._body = body
+        self._final_url = final_url
+
+    def __enter__(self) -> "_FakeResponse":
+        return self
+
+    def __exit__(self, *exc) -> bool:
+        return False
+
+    def geturl(self) -> str:
+        return self._final_url
+
+    def read(self) -> bytes:
+        return self._body
+
+
+def test_http_fetch_uses_shared_client_and_rejects_redirect_downgrade(monkeypatch):
+    captured: dict = {}
+
+    def fake_open_url(url, timeout=10, extra_headers=None, redirect_validator=None):
+        captured["url"] = url
+        captured["validator"] = redirect_validator
+        return _FakeResponse(b'{"schema_version": "1.0"}', url)
+
+    monkeypatch.setattr("specify_cli.authentication.http.open_url", fake_open_url)
+
+    fetcher = adapters.make_catalog_fetcher(allow_network=True)
+    result = fetcher(_source("https://example.com/c.json"))
+    assert result == {"schema_version": "1.0"}
+    assert captured["url"] == "https://example.com/c.json"
+
+    # The validator handed to open_url must reject an HTTP downgrade redirect.
+    validator = captured["validator"]
+    assert validator is not None
+    with pytest.raises(BundlerError, match="must use HTTPS"):
+        validator("https://example.com/c.json", "http://evil.example/c.json")
+    # And a same-scheme HTTPS redirect is allowed (no raise).
+    validator("https://example.com/c.json", "https://cdn.example/c.json")
+
+
+def test_http_fetch_rejects_non_https_final_url(monkeypatch):
+    def fake_open_url(url, timeout=10, extra_headers=None, redirect_validator=None):
+        # Simulate a response whose final URL silently downgraded to HTTP.
+        return _FakeResponse(b"{}", "http://evil.example/c.json")
+
+    monkeypatch.setattr("specify_cli.authentication.http.open_url", fake_open_url)
+
+    fetcher = adapters.make_catalog_fetcher(allow_network=True)
+    with pytest.raises(BundlerError, match="must use HTTPS"):
+        fetcher(_source("https://example.com/c.json"))

tests/unit/test_bundler_catalog_config.py

@@ -0,0 +1,181 @@
+"""Unit tests for project catalog-config id derivation and url canonicalization."""
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.commands_impl import catalog_config as cc
+
+
+def test_derive_id_incorporates_path_stem_for_same_host():
+    # Two catalogs on the same host must not collide on the derived id.
+    a = cc._derive_id("https://example.com/team-a.json")
+    b = cc._derive_id("https://example.com/team-b.json")
+    assert a == "example-com-team-a"
+    assert b == "example-com-team-b"
+    assert a != b
+
+
+def test_derive_id_distinguishes_tlds():
+    # Different TLDs sharing a second-level label must not collide.
+    com = cc._derive_id("https://example.com/team-a.json")
+    net = cc._derive_id("https://example.net/team-a.json")
+    assert com == "example-com-team-a"
+    assert net == "example-net-team-a"
+    assert com != net
+
+
+def test_derive_id_falls_back_to_host_when_no_path():
+    assert cc._derive_id("https://example.com/") == "example-com"
+
+
+def test_derive_id_for_local_path_uses_stem():
+    assert cc._derive_id("./catalogs/my-catalog.json") == "my-catalog"
+
+
+def test_canonicalize_makes_relative_local_path_absolute(tmp_path: Path, monkeypatch):
+    monkeypatch.chdir(tmp_path)
+    (tmp_path / "local.json").write_text("{}", encoding="utf-8")
+
+    result = cc._canonicalize_url("local.json")
+
+    assert Path(result).is_absolute()
+    assert Path(result) == (tmp_path / "local.json").resolve()
+
+
+def test_canonicalize_leaves_remote_urls_untouched():
+    for url in (
+        "https://example.com/c.json",
+        "http://localhost:8080/c.json",
+        "file:///tmp/c.json",
+        "builtin://default",
+    ):
+        assert cc._canonicalize_url(url) == url
+
+
+def test_add_source_persists_absolute_local_path(tmp_path: Path, monkeypatch):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    catalog = project / "sub" / "cat.json"
+    catalog.parent.mkdir()
+    catalog.write_text("{}", encoding="utf-8")
+
+    monkeypatch.chdir(project)
+    source = cc.add_source(project, "sub/cat.json", policy="install-allowed", priority=50)
+
+    assert Path(source.url).is_absolute()
+    assert Path(source.url) == catalog.resolve()
+
+
+def test_add_source_refuses_symlinked_specify_escape(tmp_path: Path):
+    project = tmp_path / "proj"
+    project.mkdir()
+    outside = tmp_path / "outside"
+    outside.mkdir()
+    (project / ".specify").symlink_to(outside, target_is_directory=True)
+
+    with pytest.raises(BundlerError, match="escapes the allowed root"):
+        cc.add_source(project, "https://example.com/c.json", policy="install-allowed", priority=50)
+
+
+def test_read_rejects_non_list_catalogs(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    cc._config_path(project).write_text(
+        "schema_version: '1.0'\ncatalogs: not-a-list\n", encoding="utf-8"
+    )
+
+    with pytest.raises(BundlerError, match="'catalogs' must be a list"):
+        cc._read(project)
+
+
+def test_read_rejects_non_mapping_catalog_entry(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    cc._config_path(project).write_text(
+        "schema_version: '1.0'\ncatalogs:\n  - just-a-string\n", encoding="utf-8"
+    )
+
+    with pytest.raises(BundlerError, match="each catalog entry must be a mapping"):
+        cc._read(project)
+
+
+def test_read_rejects_non_mapping_top_level(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    cc._config_path(project).write_text("- a\n- b\n", encoding="utf-8")
+
+    with pytest.raises(BundlerError, match="expected a mapping at the top level"):
+        cc._read(project)
+
+
+def test_read_rejects_unknown_schema_version(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    cc._config_path(project).write_text(
+        "schema_version: '2.0'\ncatalogs: []\n", encoding="utf-8"
+    )
+
+    with pytest.raises(BundlerError, match="Unsupported catalog config schema version"):
+        cc._read(project)
+
+
+def test_read_accepts_forward_compatible_minor_schema(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    cc._config_path(project).write_text(
+        "schema_version: '1.5'\ncatalogs: []\n", encoding="utf-8"
+    )
+    assert cc._read(project) == []
+
+
+def test_read_tolerates_missing_schema_version(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    cc._config_path(project).write_text("catalogs: []\n", encoding="utf-8")
+    assert cc._read(project) == []
+
+
+def test_read_returns_empty_for_missing_or_empty_config(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    assert cc._read(project) == []
+
+    cc._config_path(project).write_text("schema_version: '1.0'\n", encoding="utf-8")
+    assert cc._read(project) == []
+
+
+def test_slug_lowercases_for_deterministic_ids():
+    # Mixed-case local filenames must derive the same id regardless of case so
+    # the case-sensitive duplicate check cannot admit logical duplicates.
+    assert cc._slug("Team-A") == "team-a"
+    assert cc._derive_id("./catalogs/Team-A.json") == "team-a"
+    assert cc._derive_id("https://Example.com/Team-A.json") == "example-com-team-a"
+
+
+def test_derive_id_handles_ipv6_literal():
+    # An IPv6 host must not be truncated at the first colon.
+    derived = cc._derive_id("https://[2001:db8::1]/catalog.json")
+    assert derived == "2001-db8--1-catalog"
+
+
+def test_derive_id_ignores_credentials_and_port():
+    assert cc._derive_id("https://user:pw@example.com:8443/c.json") == "example-com-c"
+
+
+def test_add_source_rejects_unsupported_scheme(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    with pytest.raises(BundlerError, match="Unsupported catalog url scheme"):
+        cc.add_source(project, "ssh://host/catalog.json", policy="install-allowed", priority=50)
+
+
+def test_add_source_allows_local_path_with_colon(tmp_path: Path, monkeypatch):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    monkeypatch.chdir(project)
+    # A relative path containing ':' but no '://' is still a local path.
+    source = cc.add_source(project, "weird:name.json", policy="install-allowed", priority=50)
+    assert source.url.endswith("weird:name.json") or "weird" in source.url

tests/unit/test_bundler_conflict.py

@@ -0,0 +1,54 @@
+"""Unit tests for conflict detection (T034): integration clash and overlap precedence."""
+from __future__ import annotations
+
+from specify_cli.bundler.models.manifest import BundleManifest, ComponentRef
+from specify_cli.bundler.models.records import InstalledBundleRecord
+from specify_cli.bundler.services.conflict import detect_conflicts
+from tests.bundler_helpers import valid_manifest_dict
+
+
+def _manifest(**overrides) -> BundleManifest:
+    return BundleManifest.from_dict(valid_manifest_dict(**overrides))
+
+
+def test_integration_clash_is_blocking():
+    manifest = _manifest(integration={"id": "claude"})
+    report = detect_conflicts(manifest, active_integration="copilot", installed=[])
+    assert report.has_blocking_conflict is True
+    assert "claude" in report.integration_clash
+    assert "copilot" in report.integration_clash
+
+
+def test_matching_integration_no_clash():
+    manifest = _manifest(integration={"id": "copilot"})
+    report = detect_conflicts(manifest, active_integration="copilot", installed=[])
+    assert report.has_blocking_conflict is False
+
+
+def test_agnostic_bundle_never_clashes():
+    manifest = _manifest()  # no integration
+    report = detect_conflicts(manifest, active_integration="copilot", installed=[])
+    assert report.has_blocking_conflict is False
+
+
+def test_overlap_with_other_bundle_is_reported():
+    manifest = _manifest()
+    other = InstalledBundleRecord.create(
+        bundle_id="other",
+        version="1.0.0",
+        components=[ComponentRef(kind="presets", id="preset-a")],
+    )
+    report = detect_conflicts(manifest, active_integration="copilot", installed=[other])
+    assert any("preset-a" in o and "other" in o for o in report.overlaps)
+    assert report.has_blocking_conflict is False
+
+
+def test_same_bundle_reinstall_is_not_overlap():
+    manifest = _manifest()
+    same = InstalledBundleRecord.create(
+        bundle_id="demo-bundle",
+        version="1.2.0",
+        components=[ComponentRef(kind="presets", id="preset-a")],
+    )
+    report = detect_conflicts(manifest, active_integration="copilot", installed=[same])
+    assert report.overlaps == []

tests/unit/test_bundler_packager.py

@@ -0,0 +1,193 @@
+"""Unit tests for the artifact packager (T023): contents, versioning, determinism."""
+from __future__ import annotations
+
+import os
+import zipfile
+from pathlib import Path
+
+import pytest
+import yaml
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.services.packager import build_bundle
+from tests.bundler_helpers import valid_manifest_dict
+
+
+def _make_bundle(directory: Path, *, extra_files: dict | None = None) -> Path:
+    directory.mkdir(parents=True, exist_ok=True)
+    (directory / "bundle.yml").write_text(
+        yaml.safe_dump(valid_manifest_dict()), encoding="utf-8"
+    )
+    (directory / "README.md").write_text("# Demo bundle", encoding="utf-8")
+    for rel, content in (extra_files or {}).items():
+        target = directory / rel
+        target.parent.mkdir(parents=True, exist_ok=True)
+        target.write_text(content, encoding="utf-8")
+    return directory
+
+
+def test_artifact_named_by_id_and_version(tmp_path: Path):
+    bundle = _make_bundle(tmp_path / "b")
+    result = build_bundle(bundle, output_dir=tmp_path / "out")
+    assert result.artifact_path.name == "demo-bundle-1.2.0.zip"
+
+
+def test_artifact_contains_manifest_and_assets(tmp_path: Path):
+    bundle = _make_bundle(tmp_path / "b", extra_files={"assets/logo.txt": "logo"})
+    result = build_bundle(bundle, output_dir=tmp_path / "out")
+    with zipfile.ZipFile(result.artifact_path) as archive:
+        names = set(archive.namelist())
+    assert "bundle.yml" in names
+    assert "README.md" in names
+    assert "assets/logo.txt" in names
+
+
+def test_build_refuses_invalid_manifest(tmp_path: Path):
+    bundle = tmp_path / "b"
+    bundle.mkdir()
+    data = valid_manifest_dict()
+    del data["bundle"]["license"]
+    (bundle / "bundle.yml").write_text(yaml.safe_dump(data), encoding="utf-8")
+    (bundle / "README.md").write_text("# x", encoding="utf-8")
+    with pytest.raises(BundlerError, match="validate"):
+        build_bundle(bundle, output_dir=tmp_path / "out")
+
+
+def test_build_missing_manifest_errors(tmp_path: Path):
+    with pytest.raises(BundlerError, match="No bundle.yml"):
+        build_bundle(tmp_path, output_dir=tmp_path / "out")
+
+
+def test_build_is_deterministic(tmp_path: Path):
+    bundle = _make_bundle(tmp_path / "b", extra_files={"a.txt": "a", "z.txt": "z"})
+    first = build_bundle(bundle, output_dir=tmp_path / "out1")
+    second = build_bundle(bundle, output_dir=tmp_path / "out2")
+    with zipfile.ZipFile(first.artifact_path) as a, zipfile.ZipFile(second.artifact_path) as b:
+        # Same files, same order (sorted).
+        assert a.namelist() == b.namelist()
+        # Fixed timestamps + permissions make each member byte-identical.
+        for left, right in zip(a.infolist(), b.infolist()):
+            assert left.date_time == right.date_time
+            assert left.external_attr == right.external_attr
+    # The whole artifact is byte-for-byte reproducible.
+    assert first.artifact_path.read_bytes() == second.artifact_path.read_bytes()
+
+
+def test_output_dir_inside_bundle_excludes_prior_artifacts(tmp_path: Path):
+    bundle = _make_bundle(tmp_path / "b", extra_files={"a.txt": "a"})
+    out_dir = bundle / "dist"
+    # Build twice into a dir nested in the bundle; the second build must not
+    # re-package the first artifact, so contents stay identical and bounded.
+    first = build_bundle(bundle, output_dir=out_dir)
+    second = build_bundle(bundle, output_dir=out_dir)
+    with zipfile.ZipFile(second.artifact_path) as archive:
+        names = archive.namelist()
+    assert not any(name.startswith("dist/") for name in names)
+    assert not any(name.endswith(".zip") for name in names)
+    assert first.file_count == second.file_count
+
+
+def test_prior_version_artifact_not_repackaged(tmp_path: Path):
+    # An older artifact sitting next to bundle.yml must not be packaged.
+    bundle = _make_bundle(tmp_path / "b", extra_files={"a.txt": "a"})
+    (bundle / "demo-bundle-0.9.0.zip").write_bytes(b"PK\x03\x04 old artifact")
+    result = build_bundle(bundle, output_dir=bundle)
+    with zipfile.ZipFile(result.artifact_path) as archive:
+        names = archive.namelist()
+    assert not any(name.endswith(".zip") for name in names)
+    assert "demo-bundle-0.9.0.zip" not in names
+
+
+def test_symlinked_directory_is_not_followed(tmp_path: Path):
+    outside = tmp_path / "outside"
+    outside.mkdir()
+    (outside / "secret.txt").write_text("secret", encoding="utf-8")
+    bundle = _make_bundle(tmp_path / "b", extra_files={"a.txt": "a"})
+    link = bundle / "linkdir"
+    try:
+        link.symlink_to(outside, target_is_directory=True)
+    except (OSError, NotImplementedError):
+        pytest.skip("symlinks not supported on this platform")
+    # Build must succeed (no ensure_within failure) and must not pull in the
+    # out-of-tree file behind the symlinked directory.
+    result = build_bundle(bundle, output_dir=tmp_path / "out")
+    with zipfile.ZipFile(result.artifact_path) as archive:
+        names = archive.namelist()
+    assert "linkdir/secret.txt" not in names
+    assert not any("secret" in name for name in names)
+
+
+def test_unsafe_bundle_id_is_rejected_before_build(tmp_path: Path):
+    data = valid_manifest_dict()
+    data["bundle"]["id"] = "../evil"
+    bundle = tmp_path / "b"
+    bundle.mkdir(parents=True)
+    (bundle / "bundle.yml").write_text(yaml.safe_dump(data), encoding="utf-8")
+    (bundle / "README.md").write_text("# x", encoding="utf-8")
+    with pytest.raises(BundlerError):
+        build_bundle(bundle, output_dir=tmp_path / "out")
+    # The traversal target must not have been written outside out_dir.
+    assert not (tmp_path / "evil-1.2.0.zip").exists()
+
+
+def test_build_refuses_missing_readme(tmp_path: Path):
+    bundle = tmp_path / "b"
+    bundle.mkdir()
+    (bundle / "bundle.yml").write_text(
+        yaml.safe_dump(valid_manifest_dict()), encoding="utf-8"
+    )
+    with pytest.raises(BundlerError, match="README.md"):
+        build_bundle(bundle, output_dir=tmp_path / "out")
+
+
+def test_asset_zip_starting_with_bundle_id_is_packaged(tmp_path: Path):
+    # A non-artifact asset whose name merely starts with the bundle id (but is
+    # not a semver-named build artifact) must still be included.
+    bundle = _make_bundle(tmp_path / "b", extra_files={"demo-bundle-assets.zip": "data"})
+    result = build_bundle(bundle, output_dir=tmp_path / "out")
+    with zipfile.ZipFile(result.artifact_path) as archive:
+        names = set(archive.namelist())
+    assert "demo-bundle-assets.zip" in names
+
+
+def test_prior_semver_artifact_is_excluded(tmp_path: Path):
+    bundle = _make_bundle(tmp_path / "b", extra_files={"demo-bundle-0.9.0.zip": "old"})
+    result = build_bundle(bundle, output_dir=bundle)
+    with zipfile.ZipFile(result.artifact_path) as archive:
+        names = set(archive.namelist())
+    assert "demo-bundle-0.9.0.zip" not in names
+
+
+def test_prior_artifact_with_prerelease_and_build_is_excluded(tmp_path: Path):
+    # A semver artifact carrying both prerelease and build metadata must still
+    # be recognized as a prior build artifact and excluded.
+    bundle = _make_bundle(
+        tmp_path / "b", extra_files={"demo-bundle-1.0.0-rc1+build5.zip": "old"}
+    )
+    result = build_bundle(bundle, output_dir=bundle)
+    with zipfile.ZipFile(result.artifact_path) as archive:
+        names = set(archive.namelist())
+    assert "demo-bundle-1.0.0-rc1+build5.zip" not in names
+
+
+@pytest.mark.skipif(
+    os.name == "nt",
+    reason="Windows filesystems do not carry Unix execute bits, so chmod(0o755) "
+    "is a no-op and there is no executability to preserve.",
+)
+def test_executable_bit_preserved_in_artifact(tmp_path: Path):
+    bundle = _make_bundle(tmp_path / "bundle")
+    script = bundle / "scripts" / "hook.sh"
+    script.parent.mkdir(parents=True, exist_ok=True)
+    script.write_text("#!/bin/sh\necho hi\n", encoding="utf-8")
+    script.chmod(0o755)
+
+    result = build_bundle(bundle, output_dir=tmp_path / "out")
+    with zipfile.ZipFile(result.artifact_path) as archive:
+        modes = {
+            info.filename: (info.external_attr >> 16) & 0o777
+            for info in archive.infolist()
+        }
+    # Executable source -> 0755; plain text files -> 0644.
+    assert modes["scripts/hook.sh"] == 0o755
+    assert modes["README.md"] == 0o644

tests/unit/test_bundler_primitives.py

@@ -0,0 +1,133 @@
+"""Unit tests for the primitive-dispatch bridge (T044).
+
+Covers routing, offline gating, and the network-aware ``DefaultPrimitiveInstaller``
+seam — without touching real catalogs or the network (Constitution Principle II,
+offline-first).
+"""
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.models.manifest import ComponentRef
+from specify_cli.bundler.services.adapters import DefaultPrimitiveInstaller
+from specify_cli.bundler.services.primitives import (
+    _ExtensionKindManager,
+    _PresetKindManager,
+    _StepKindManager,
+    _WorkflowKindManager,
+    primitive_manager,
+)
+
+
+def _component(kind: str, cid: str = "x") -> ComponentRef:
+    return ComponentRef(kind=kind, id=cid)
+
+
+def test_primitive_manager_routes_each_kind(tmp_path: Path):
+    assert isinstance(primitive_manager("presets", tmp_path), _PresetKindManager)
+    assert isinstance(primitive_manager("extensions", tmp_path), _ExtensionKindManager)
+    assert isinstance(primitive_manager("workflows", tmp_path), _WorkflowKindManager)
+    assert isinstance(primitive_manager("steps", tmp_path), _StepKindManager)
+
+
+def test_primitive_manager_rejects_unknown_kind(tmp_path: Path):
+    with pytest.raises(BundlerError, match="Unknown component kind"):
+        primitive_manager("bogus", tmp_path)
+
+
+def test_offline_preset_not_bundled_refuses(tmp_path: Path):
+    manager = primitive_manager("presets", tmp_path, allow_network=False)
+    with pytest.raises(BundlerError, match="network access is disabled"):
+        manager.install(_component("presets", "definitely-not-bundled"))
+
+
+def test_offline_extension_not_bundled_refuses(tmp_path: Path):
+    manager = primitive_manager("extensions", tmp_path, allow_network=False)
+    with pytest.raises(BundlerError, match="network access is disabled"):
+        manager.install(_component("extensions", "definitely-not-bundled"))
+
+
+def test_offline_workflow_refuses_without_network(tmp_path: Path):
+    manager = primitive_manager("workflows", tmp_path, allow_network=False)
+    with pytest.raises(BundlerError, match="network access is disabled"):
+        manager.install(_component("workflows"))
+
+
+def test_offline_step_refuses_without_network(tmp_path: Path):
+    manager = primitive_manager("steps", tmp_path, allow_network=False)
+    with pytest.raises(BundlerError, match="network access is disabled"):
+        manager.install(_component("steps"))
+
+
+def test_default_installer_threads_allow_network(tmp_path: Path):
+    installer = DefaultPrimitiveInstaller(allow_network=False)
+    with pytest.raises(BundlerError, match="network access is disabled"):
+        installer.install(tmp_path, _component("workflows"))
+
+
+def test_offline_workflow_allows_bundled(tmp_path: Path, monkeypatch):
+    # A workflow that ships with Spec Kit must install even with --offline.
+    import specify_cli
+    import specify_cli._assets as assets
+
+    monkeypatch.setattr(
+        assets, "_locate_bundled_workflow", lambda wid: tmp_path / "wf"
+    )
+    calls: list[str] = []
+    monkeypatch.setattr(specify_cli, "workflow_add", lambda wid: calls.append(wid))
+
+    manager = primitive_manager("workflows", tmp_path, allow_network=False)
+    manager.install(_component("workflows", "bundled-wf"))
+
+    assert calls == ["bundled-wf"]
+
+
+def test_assert_pinned_version_matches_passes():
+    from specify_cli.bundler.services.primitives import _assert_pinned_version
+
+    # Equal (including v-prefix/normalization) is accepted; no version pins are no-ops.
+    _assert_pinned_version("Preset", "p", "2.0.0", "2.0.0")
+    _assert_pinned_version("Preset", "p", "2.0.0", "v2.0.0")
+    _assert_pinned_version("Preset", "p", None, "9.9.9")
+    _assert_pinned_version("Preset", "p", "2.0.0", None)
+
+
+def test_assert_pinned_version_mismatch_raises():
+    from specify_cli.bundler.services.primitives import _assert_pinned_version
+
+    with pytest.raises(BundlerError, match="pinned to version 2.0.0"):
+        _assert_pinned_version("Preset", "preset-a", "2.0.0", "3.1.0")
+
+
+def test_workflow_version_mismatch_refuses(tmp_path: Path, monkeypatch):
+    from specify_cli.workflows.catalog import WorkflowCatalog
+
+    monkeypatch.setattr(
+        WorkflowCatalog, "get_workflow_info", lambda self, wid: {"version": "9.9.9"}
+    )
+    manager = primitive_manager("workflows", tmp_path, allow_network=True)
+    component = ComponentRef(kind="workflows", id="wf-a", version="0.3.0")
+    with pytest.raises(BundlerError, match="pinned to version 0.3.0"):
+        manager.install(component)
+
+
+def test_preset_install_preserves_explicit_zero_priority(tmp_path: Path, monkeypatch):
+    import specify_cli._assets as assets
+
+    calls = {}
+
+    class _FakeManager:
+        def install_from_directory(self, directory, speckit_version, priority):
+            calls["priority"] = priority
+
+    monkeypatch.setattr(assets, "_locate_bundled_preset", lambda cid: tmp_path)
+
+    manager = primitive_manager("presets", tmp_path, allow_network=False)
+    manager._manager = _FakeManager()
+    manager.install(ComponentRef(kind="presets", id="p", priority=0))
+
+    # An explicit priority of 0 must be passed through, not replaced by default.
+    assert calls["priority"] == 0

tests/unit/test_bundler_records.py

@@ -0,0 +1,190 @@
+"""Unit tests for installed-bundle records and collateral-protection logic."""
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.models.manifest import ComponentRef
+from specify_cli.bundler.models.records import (
+    InstalledBundleRecord,
+    components_still_needed,
+    load_records,
+    records_path,
+    remove_record,
+    save_records,
+    upsert_record,
+)
+
+
+def _record(bundle_id: str, comps) -> InstalledBundleRecord:
+    return InstalledBundleRecord.create(
+        bundle_id=bundle_id,
+        version="1.0.0",
+        components=[ComponentRef(kind=k, id=i) for k, i in comps],
+    )
+
+
+def test_save_and_load_roundtrip(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    rec = _record("a", [("presets", "p1"), ("steps", "s1")])
+    save_records(tmp_path, [rec])
+    loaded = load_records(tmp_path)
+    assert len(loaded) == 1
+    assert loaded[0].bundle_id == "a"
+    assert {(c.kind, c.id) for c in loaded[0].contributed_components} == {
+        ("presets", "p1"),
+        ("steps", "s1"),
+    }
+
+
+def test_load_missing_file_returns_empty(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    assert load_records(tmp_path) == []
+
+
+def test_corrupt_priority_raises_actionable_error(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    rec = _record("a", [("presets", "p1")])
+    save_records(tmp_path, [rec])
+    path = records_path(tmp_path)
+    data = json.loads(path.read_text(encoding="utf-8"))
+    data["bundles"][0]["contributed_components"][0]["priority"] = "high"
+    path.write_text(json.dumps(data), encoding="utf-8")
+    with pytest.raises(BundlerError, match="priority must be an integer"):
+        load_records(tmp_path)
+
+
+def test_upsert_replaces_same_id():
+    rec1 = _record("a", [("presets", "p1")])
+    rec2 = _record("a", [("presets", "p2")])
+    result = upsert_record([rec1], rec2)
+    assert len(result) == 1
+    assert result[0].contributed_components[0].id == "p2"
+
+
+def test_remove_record_drops_target():
+    recs = [_record("a", [("presets", "p1")]), _record("b", [("steps", "s1")])]
+    result = remove_record(recs, "a")
+    assert [r.bundle_id for r in result] == ["b"]
+
+
+def test_components_still_needed_excludes_target():
+    recs = [
+        _record("a", [("presets", "shared"), ("steps", "only-a")]),
+        _record("b", [("presets", "shared")]),
+    ]
+    needed = components_still_needed(recs, exclude_bundle_id="a")
+    assert ("presets", "shared") in needed
+    assert ("steps", "only-a") not in needed
+
+
+def test_save_records_refuses_symlinked_specify_escape(tmp_path: Path):
+    # Defense-in-depth: a symlinked .specify pointing outside the project must
+    # not let records be written outside project_root.
+    project = tmp_path / "proj"
+    project.mkdir()
+    outside = tmp_path / "outside"
+    outside.mkdir()
+    (project / ".specify").symlink_to(outside, target_is_directory=True)
+
+    with pytest.raises(BundlerError, match="escapes the allowed root"):
+        save_records(project, [_record("a", [("presets", "p1")])])
+
+
+def test_load_records_rejects_non_list_bundles(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    path = records_path(tmp_path)
+    path.write_text(json.dumps({"schema_version": "1.0", "bundles": "oops"}), encoding="utf-8")
+    with pytest.raises(BundlerError, match="'bundles' must be a list"):
+        load_records(tmp_path)
+
+
+def test_load_records_rejects_non_list_contributed_components(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    path = records_path(tmp_path)
+    payload = {
+        "schema_version": "1.0",
+        "bundles": [
+            {"bundle_id": "a", "version": "1.0.0", "contributed_components": "oops"}
+        ],
+    }
+    path.write_text(json.dumps(payload), encoding="utf-8")
+    with pytest.raises(BundlerError, match="'contributed_components' must be a list"):
+        load_records(tmp_path)
+
+
+def test_load_records_rejects_unknown_component_kind(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    path = records_path(tmp_path)
+    payload = {
+        "schema_version": "1.0",
+        "bundles": [
+            {
+                "bundle_id": "a",
+                "version": "1.0.0",
+                "contributed_components": [{"kind": "bogus", "id": "x"}],
+            }
+        ],
+    }
+    path.write_text(json.dumps(payload), encoding="utf-8")
+    with pytest.raises(BundlerError, match="must be one of"):
+        load_records(tmp_path)
+
+
+def test_load_records_rejects_component_missing_id(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    path = records_path(tmp_path)
+    payload = {
+        "schema_version": "1.0",
+        "bundles": [
+            {
+                "bundle_id": "a",
+                "version": "1.0.0",
+                "contributed_components": [{"kind": "presets", "id": ""}],
+            }
+        ],
+    }
+    path.write_text(json.dumps(payload), encoding="utf-8")
+    with pytest.raises(BundlerError, match="missing its 'id'"):
+        load_records(tmp_path)
+
+
+def test_load_records_rejects_missing_schema_version(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    records_path(tmp_path).write_text(json.dumps({"bundles": []}), encoding="utf-8")
+    with pytest.raises(BundlerError, match="missing 'schema_version'"):
+        load_records(tmp_path)
+
+
+def test_load_records_rejects_unknown_schema_version(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    payload = {"schema_version": "2.0", "bundles": []}
+    records_path(tmp_path).write_text(json.dumps(payload), encoding="utf-8")
+    with pytest.raises(BundlerError, match="Unsupported records schema version"):
+        load_records(tmp_path)
+
+
+def test_load_records_rejects_record_missing_bundle_id(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    payload = {"schema_version": "1.0", "bundles": [{"version": "1.0.0"}]}
+    records_path(tmp_path).write_text(json.dumps(payload), encoding="utf-8")
+    with pytest.raises(BundlerError, match="missing its 'bundle_id'"):
+        load_records(tmp_path)
+
+
+def test_load_records_rejects_record_missing_version(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    payload = {"schema_version": "1.0", "bundles": [{"bundle_id": "a"}]}
+    records_path(tmp_path).write_text(json.dumps(payload), encoding="utf-8")
+    with pytest.raises(BundlerError, match="missing its 'version'"):
+        load_records(tmp_path)
+
+
+def test_load_records_accepts_forward_compatible_minor_schema(tmp_path: Path):
+    (tmp_path / ".specify").mkdir()
+    payload = {"schema_version": "1.5", "bundles": []}
+    records_path(tmp_path).write_text(json.dumps(payload), encoding="utf-8")
+    assert load_records(tmp_path) == []

tests/unit/test_bundler_references.py

@@ -0,0 +1,41 @@
+"""Unit tests for the bundle reference checker (T047 / FR-005 / SC-007).
+
+Resolution is offline-first: bundled and installed components resolve without a
+network; unknown ids fail online and downgrade to warnings offline.
+"""
+from __future__ import annotations
+
+from pathlib import Path
+
+from specify_cli.bundler.models.manifest import ComponentRef
+from specify_cli.bundler.services.references import make_reference_checker
+from tests.bundler_helpers import make_project
+
+
+def _ref(kind: str, id_: str) -> ComponentRef:
+    return ComponentRef(kind=kind, id=id_, version="1.0.0")
+
+
+def test_bundled_extension_resolves(tmp_path: Path):
+    root = make_project(tmp_path)
+    warnings: list[str] = []
+    check = make_reference_checker(root, allow_network=True, warnings=warnings)
+    assert check(_ref("extensions", "agent-context")) is None
+    assert warnings == []
+
+
+def test_unknown_reference_errors_online(tmp_path: Path):
+    root = make_project(tmp_path)
+    warnings: list[str] = []
+    check = make_reference_checker(root, allow_network=True, warnings=warnings)
+    problem = check(_ref("presets", "does-not-exist"))
+    assert problem is not None
+    assert "does-not-exist" in problem
+
+
+def test_unknown_reference_warns_offline(tmp_path: Path):
+    root = make_project(tmp_path)
+    warnings: list[str] = []
+    check = make_reference_checker(root, allow_network=False, warnings=warnings)
+    assert check(_ref("presets", "does-not-exist")) is None
+    assert any("does-not-exist" in w for w in warnings)

tests/unit/test_bundler_resolver.py

@@ -0,0 +1,81 @@
+"""Unit tests for the resolver: version gate and integration compatibility."""
+from __future__ import annotations
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.models.manifest import BundleManifest
+from specify_cli.bundler.services.resolver import resolve_install_plan
+from tests.bundler_helpers import valid_manifest_dict
+
+
+def _manifest(**overrides) -> BundleManifest:
+    return BundleManifest.from_dict(valid_manifest_dict(**overrides))
+
+
+def test_plan_expands_all_components():
+    plan = resolve_install_plan(
+        _manifest(), speckit_version="0.11.2", active_integration="copilot"
+    )
+    assert plan.component_count == 4
+    assert plan.bundle_id == "demo-bundle"
+
+
+def test_version_gate_refuses_incompatible():
+    manifest = _manifest(requires={"speckit_version": ">=99.0.0"})
+    with pytest.raises(BundlerError, match="requires Spec Kit"):
+        resolve_install_plan(
+            manifest, speckit_version="0.11.2", active_integration="copilot"
+        )
+
+
+def test_integration_clash_halts():
+    manifest = _manifest(integration={"id": "claude"})
+    with pytest.raises(BundlerError, match="active integration"):
+        resolve_install_plan(
+            manifest, speckit_version="0.11.2", active_integration="copilot"
+        )
+
+
+def test_agnostic_inherits_active_integration():
+    plan = resolve_install_plan(
+        _manifest(), speckit_version="0.11.2", active_integration="copilot"
+    )
+    assert plan.effective_integration == "copilot"
+
+
+def test_matching_integration_is_allowed():
+    manifest = _manifest(integration={"id": "copilot"})
+    plan = resolve_install_plan(
+        manifest, speckit_version="0.11.2", active_integration="copilot"
+    )
+    assert plan.effective_integration == "copilot"
+
+
+def test_pinned_integration_with_indeterminate_active_fails():
+    # FR-019 guard: a bundle that pins an integration must not silently adopt it
+    # when the project's active integration cannot be determined.
+    manifest = _manifest(integration={"id": "claude"})
+    with pytest.raises(BundlerError, match="could not be determined"):
+        resolve_install_plan(
+            manifest, speckit_version="0.11.2", active_integration=None
+        )
+
+
+def test_pinned_integration_with_indeterminate_active_allows_explicit_override():
+    manifest = _manifest(integration={"id": "claude"})
+    plan = resolve_install_plan(
+        manifest,
+        speckit_version="0.11.2",
+        active_integration="claude",
+        integration_explicit=True,
+    )
+    assert plan.effective_integration == "claude"
+
+
+def test_tool_requirements_become_warnings():
+    manifest = _manifest(requires={"speckit_version": ">=0.1.0", "tools": ["docker"]})
+    plan = resolve_install_plan(
+        manifest, speckit_version="0.11.2", active_integration="copilot"
+    )
+    assert any("docker" in w for w in plan.warnings)

tests/unit/test_bundler_validator.py

@@ -0,0 +1,32 @@
+"""Unit tests for the bundle manifest validator service."""
+from __future__ import annotations
+
+import pytest
+
+from specify_cli.bundler.models.manifest import BundleManifest
+from specify_cli.bundler.services import validator as validator_mod
+from specify_cli.bundler.services.validator import validate_manifest
+from tests.bundler_helpers import valid_manifest_dict
+
+
+def _manifest(**overrides) -> BundleManifest:
+    return BundleManifest.from_dict(valid_manifest_dict(**overrides))
+
+
+def test_invalid_speckit_constraint_reported_as_error():
+    manifest = _manifest(requires={"speckit_version": ">>bad"})
+    report = validate_manifest(manifest)
+    assert not report.ok
+    assert any("speckit_version" in e for e in report.errors)
+
+
+def test_non_bundler_error_not_swallowed(monkeypatch):
+    # A programming error inside constraint parsing must propagate, not be
+    # masked behind an "invalid constraint" validation message.
+    def boom(_value):
+        raise RuntimeError("unexpected bug")
+
+    monkeypatch.setattr(validator_mod, "parse_constraint", boom)
+    manifest = _manifest(requires={"speckit_version": ">=1.0.0"})
+    with pytest.raises(RuntimeError, match="unexpected bug"):
+        validate_manifest(manifest)

tests/unit/test_bundler_versioning.py

@@ -0,0 +1,68 @@
+"""Unit tests for version parsing and constraint satisfaction (FR-016 gate)."""
+from __future__ import annotations
+
+import pytest
+
+from specify_cli.bundler import BundlerError
+from specify_cli.bundler.lib.versioning import is_semver, satisfies
+
+
+@pytest.mark.parametrize("value,expected", [
+    ("1.0.0", True),
+    ("0.11.2", True),
+    ("1.2.3-rc1", True),
+    ("1.2.3-alpha1", True),
+    ("1.2.3-beta2", True),
+    ("v1.2.3", True),
+    ("not-a-version", False),
+    ("", False),
+    # packaging.version.Version accepts these partial versions; SemVer must not.
+    ("1", False),
+    ("1.0", False),
+    ("1.2.3.4", False),
+])
+def test_is_semver(value, expected):
+    assert is_semver(value) is expected
+
+
+@pytest.mark.parametrize("installed,constraint,ok", [
+    ("0.11.2", ">=0.1.0", True),
+    ("0.11.2", ">=1.0.0", False),
+    ("1.0.0", ">=1.0.0,<2.0.0", True),
+    ("2.0.0", ">=1.0.0,<2.0.0", False),
+    ("1.5.0", "", True),  # empty constraint is permissive
+    # Prerelease spellings normalize consistently for constraint checks.
+    ("1.2.3-rc1", ">=1.2.0", True),
+    ("1.2.3-alpha1", ">=2.0.0", False),
+])
+def test_satisfies(installed, constraint, ok):
+    assert satisfies(installed, constraint) is ok
+
+
+def test_invalid_constraint_raises():
+    with pytest.raises(BundlerError):
+        satisfies("1.0.0", ">>bad")
+
+
+def test_uppercase_v_prefix_tolerated():
+    # Mirrors specify_cli._version tag normalization (V -> v).
+    assert is_semver("V1.2.3") is True
+    assert satisfies("V1.2.3", ">=1.2.0") is True
+
+
+@pytest.mark.parametrize("installed,constraint,ok", [
+    # Prerelease spellings are now normalized inside constraints too, so a
+    # constraint like ">=1.2.3-rc1" parses (previously raised InvalidSpecifier).
+    ("1.2.3-rc2", ">=1.2.3-rc1", True),
+    ("1.2.2", ">=1.2.3-rc1", False),
+    ("1.5.0", ">=1.2.3-rc1,<2.0.0", True),
+    ("1.2.3-beta.1", ">=1.2.3-alpha1", True),
+])
+def test_satisfies_prerelease_in_constraint(installed, constraint, ok):
+    assert satisfies(installed, constraint) is ok
+
+
+def test_parse_constraint_empty_is_permissive():
+    from specify_cli.bundler.lib.versioning import parse_constraint
+
+    assert str(parse_constraint("")) == ""