chore: bump version to 0.12.6

* fix(bundler): validate catalog URLs in `catalog add` (HTTPS-only, require host)

add_source persisted remote catalog URLs without the HTTPS/host checks
that specify_cli.catalogs (#3210) and the bundler adapters (#3333)
enforce, and an unclosed IPv6 bracket escaped as a raw ValueError.
Mirror the catalogs.py validation for http(s) schemes and wrap urlparse
so malformed input raises BundlerError.

Fixes #3366

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

* docs: correct config filename and validation reference in comment

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

---------

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

.github/workflows/docs.yml

@@ -35,7 +35,7 @@ jobs:
           fetch-depth: 0 # Fetch all history for git info
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@9a946fdbd5fb07b82b2f5a4466058b876ab72bb2 # v5.3.0
+        uses: actions/setup-dotnet@26b0ec14cb23fa6904739307f278c14f94c95bf1 # v5.4.0
         with:
           dotnet-version: '8.x'
 

CHANGELOG.md

@@ -2,6 +2,51 @@
 
 <!-- insert new changelog below this comment -->
 
+## [0.12.6] - 2026-07-07
+
+### Changed
+
+- fix(bundler): validate catalog URLs in `catalog add` (HTTPS-only, require host) (#3367)
+- Update Ralph Loop extension to v1.2.1 (#3365)
+- fix extension-local script path rewriting (#3364)
+- Add Charter extension to community catalog (#3363)
+- feat(scripts): add Python check-prerequisites PoC (#3302)
+- test: reduce registry manifest test repetition (#3146)
+- fix(integrations): hermes honors SPECKIT_INTEGRATION_HERMES_EXTRA_ARGS (#3346)
+- fix(extensions): coerce non-mapping YAML config roots to {} in ConfigManager (#3345)
+- fix(yaml): pin goose recipe prompt block-scalar indentation (#3343)
+- chore: release 0.12.5, begin 0.12.6.dev0 development (#3381)
+
+## [0.12.5] - 2026-07-06
+
+### Changed
+
+- fix(workflows): match gate reject option case-insensitively (#3335)
+- fix(bundler): reject host-less catalog URLs in adapters (use hostname, not netloc) (#3333)
+- fix(bundler): resolve catalog search at highest-precedence source before filtering (#3331)
+- fix(workflows): compare non-numeric strings lexicographically instead of returning False (#3323)
+- fix(workflows): quote-aware interpolation so a literal }} in a filter arg doesn't break multi-expression templates (#3307)
+- Support namespaced git feature branch templates (#3293)
+- chore(deps): bump actions/setup-dotnet from 5.3.0 to 5.4.0 (#3315)
+- fix(integrations): cursor-agent honors executable/extra-args env overrides (#3265)
+- docs: drop stale kimi KIMI.md->AGENTS.md migration note (#3291)
+- chore: release 0.12.4, begin 0.12.5.dev0 development (#3305)
+
+## [0.12.4] - 2026-07-02
+
+### Changed
+
+- feat(cli): add `py` script type & Python interpreter resolution (#3278) (#3285)
+- fix: resolve GitHub release asset API URL for private repo bundle downloads (#3136)
+- [extension] Add Analytics extension to community catalog (#3296)
+- fix: interpolate multi-expression templates instead of returning None (#3208) (#3228)
+- feat(cli): honor SPECIFY_INIT_DIR in the specify CLI project resolver (#3186)
+- fix(extensions): resolve core-command dirs via _assets helpers (#3274) (#3287)
+- fix: fall back to feature dir basename for empty CURRENT_BRANCH (#3026) (#3229)
+- feat(bug-fix): add label-driven bug-fix agentic workflow (#3258)
+- feat(workflows): add label-driven bug-test workflow (#3239) (#3257)
+- chore: release 0.12.3, begin 0.12.4.dev0 development (#3295)
+
 ## [0.12.3] - 2026-07-01
 
 ### Changed

docs/community/extensions.md

@@ -42,6 +42,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | Bugfix Workflow | Structured bugfix workflow — capture bugs, trace to spec artifacts, and patch specs surgically | `process` | Read+Write | [spec-kit-bugfix](https://github.com/Quratulain-bilal/spec-kit-bugfix) |
 | Canon | Adds canon-driven (baseline-driven) workflows: spec-first, code-first, spec-drift. Requires Canon Core preset installation. | `process` | Read+Write | [spec-kit-canon](https://github.com/maximiliamus/spec-kit-canon/tree/master/extension) |
 | Catalog CI | Automated validation for spec-kit community catalog entries — structure, URLs, diffs, and linting | `process` | Read-only | [spec-kit-catalog-ci](https://github.com/Quratulain-bilal/spec-kit-catalog-ci) |
+| Charter | Compose modular project constitutions from shared fragment registries. Centralize governance rules, select per-project fragments, track upstream changes, and keep multi-project setups consistent. | `process` | Read+Write | [spec-kit-charter](https://github.com/Fyloss/spec-kit-charter) |
 | CI Guard | Spec compliance gates for CI/CD — verify specs exist, check drift, and block merges on gaps | `process` | Read-only | [spec-kit-ci-guard](https://github.com/Quratulain-bilal/spec-kit-ci-guard) |
 | Checkpoint Extension | Commit the changes made during the middle of the implementation, so you don't end up with just one very large commit at the end | `code` | Read+Write | [spec-kit-checkpoint](https://github.com/aaronrsun/spec-kit-checkpoint) |
 | Cleanup Extension | Post-implementation quality gate that reviews changes, fixes small issues (scout rule), creates tasks for medium issues, and generates analysis for large issues | `code` | Read+Write | [spec-kit-cleanup](https://github.com/dsrednicki/spec-kit-cleanup) |

docs/reference/integrations.md

@@ -24,7 +24,7 @@ The Specify CLI supports a wide range of AI coding agents. When you run `specify
 | [IBM Bob](https://www.ibm.com/products/bob)                                          | `bob`            | IDE-based agent                                                                                                                           |
 | [Junie](https://junie.jetbrains.com/)                                                | `junie`          |                                                                                                                                           |
 | [Kilo Code](https://github.com/Kilo-Org/kilocode)                                    | `kilocode`       |                                                                                                                                           |
-| [Kimi Code](https://code.kimi.com/)                                                  | `kimi`           | Skills-based integration; installs into `.kimi-code/skills/`. `--migrate-legacy` moves old `.kimi/skills/` installs to the new paths, and (when the `agent-context` extension is enabled) migrates `KIMI.md` context into `AGENTS.md` |
+| [Kimi Code](https://code.kimi.com/)                                                  | `kimi`           | Skills-based integration; installs into `.kimi-code/skills/`. `--migrate-legacy` moves old `.kimi/skills/` installs to the new paths |
 | [Kiro CLI](https://kiro.dev/docs/cli/)                                               | `kiro-cli`       | Kiro CLI does not substitute `$ARGUMENTS` in file-based prompts, so Spec Kit ships a prose fallback at render time (see [Manage prompts](https://kiro.dev/docs/cli/chat/manage-prompts/) and issue [#1926](https://github.com/github/spec-kit/issues/1926)). Alias: `--integration kiro` |
 | [Lingma](https://lingma.aliyun.com/)                                                 | `lingma`         | Skills-based integration; skills are installed automatically                                                                               |
 | [Mistral Vibe](https://github.com/mistralai/mistral-vibe)                            | `vibe`           |                                                                                                                                           |
@@ -218,7 +218,7 @@ Some integrations accept additional options via `--integration-options`:
 | Integration | Option              | Description                                                    |
 | ----------- | ------------------- | -------------------------------------------------------------- |
 | `generic`   | `--commands-dir`    | Required. Directory for command files                          |
-| `kimi`      | `--migrate-legacy`  | Migrate legacy `.kimi/skills/` installs to `.kimi-code/skills/` (including dotted→hyphenated directory names); when the `agent-context` extension is enabled, also migrates `KIMI.md` to `AGENTS.md` |
+| `kimi`      | `--migrate-legacy`  | Migrate legacy `.kimi/skills/` installs to `.kimi-code/skills/` (including dotted→hyphenated skill naming, e.g. `speckit.xxx` → `speckit-xxx`) |
 
 Example:
 

extensions/catalog.community.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-07-01T00:00:00Z",
+  "updated_at": "2026-07-06T00:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "aide": {
@@ -670,6 +670,40 @@
       "created_at": "2026-04-11T18:00:00Z",
       "updated_at": "2026-04-11T18:00:00Z"
     },
+    "charter": {
+      "name": "Charter",
+      "id": "charter",
+      "description": "Compose modular project constitutions from shared fragment registries. Centralize governance rules, select per-project fragments, track upstream changes, and keep multi-project setups consistent.",
+      "author": "Fyloss",
+      "version": "0.3.1",
+      "download_url": "https://github.com/Fyloss/spec-kit-charter/archive/refs/tags/v0.3.1.zip",
+      "repository": "https://github.com/Fyloss/spec-kit-charter",
+      "homepage": "https://github.com/Fyloss/spec-kit-charter",
+      "documentation": "https://github.com/Fyloss/spec-kit-charter/tree/master/docs",
+      "changelog": "https://github.com/Fyloss/spec-kit-charter/blob/master/CHANGELOG.md",
+      "license": "MIT",
+      "category": "process",
+      "effect": "read-write",
+      "requires": {
+        "speckit_version": ">=0.11.9"
+      },
+      "provides": {
+        "commands": 5,
+        "hooks": 1
+      },
+      "tags": [
+        "constitution",
+        "governance",
+        "modular",
+        "fragments",
+        "registry"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-07-06T00:00:00Z",
+      "updated_at": "2026-07-06T00:00:00Z"
+    },
     "ci-guard": {
       "name": "CI Guard",
       "id": "ci-guard",
@@ -2679,8 +2713,8 @@
       "id": "ralph",
       "description": "Autonomous implementation loop using AI agent CLI",
       "author": "Rubiss",
-      "version": "1.1.1",
+      "version": "1.2.1",
-      "download_url": "https://github.com/Rubiss-Projects/spec-kit-ralph/archive/refs/tags/v1.1.1.zip",
+      "download_url": "https://github.com/Rubiss-Projects/spec-kit-ralph/archive/refs/tags/v1.2.1.zip",
       "repository": "https://github.com/Rubiss-Projects/spec-kit-ralph",
       "homepage": "https://github.com/Rubiss-Projects/spec-kit-ralph",
       "documentation": "https://github.com/Rubiss-Projects/spec-kit-ralph/blob/main/README.md",
@@ -2689,7 +2723,7 @@
       "category": "code",
       "effect": "read-write",
       "requires": {
-        "speckit_version": ">=0.1.0",
+        "speckit_version": ">=0.8.5",
         "tools": [
           {
             "name": "copilot",
@@ -2699,6 +2733,10 @@
             "name": "codex",
             "required": false
           },
+          {
+            "name": "claude",
+            "required": false
+          },
           {
             "name": "git",
             "required": true
@@ -2714,13 +2752,14 @@
         "automation",
         "loop",
         "copilot",
-        "codex"
+        "codex",
+        "claude"
       ],
       "verified": false,
       "downloads": 0,
       "stars": 0,
       "created_at": "2026-03-09T00:00:00Z",
-      "updated_at": "2026-06-05T03:11:06Z"
+      "updated_at": "2026-07-06T00:00:00Z"
     },
     "reconcile": {
       "name": "Reconcile Extension",

extensions/git/README.md

@@ -7,7 +7,7 @@ Git repository initialization, feature branch creation, numbering (sequential/ti
 This extension provides Git operations as an optional, self-contained module. It manages:
 
 - **Repository initialization** with configurable commit messages
-- **Feature branch creation** with sequential (`001-feature-name`) or timestamp (`20260319-143022-feature-name`) numbering
+- **Feature branch creation** with sequential (`001-feature-name`) or timestamp (`20260319-143022-feature-name`) numbering and optional templates for branch namespaces
 - **Branch validation** to ensure branches follow naming conventions
 - **Git remote detection** for GitHub integration (e.g., issue creation)
 - **Auto-commit** after core commands (configurable per-command with custom messages)
@@ -53,6 +53,16 @@ Configuration is stored in `.specify/extensions/git/git-config.yml`:
 # Branch numbering strategy: "sequential" or "timestamp"
 branch_numbering: sequential
 
+# Optional branch name template. Leave empty for the default "{number}-{slug}".
+# Supported tokens: {author}, {app}, {number}, {slug}; {slug} must not appear
+# before {number}, and the final path segment must start with {number}-.
+# Example for monorepos: "{author}/{app}/{number}-{slug}"
+branch_template: ""
+
+# Optional shorthand namespace. Leave empty to use branch_template/default behavior.
+# Example: "features/{app}" expands to "features/{app}/{number}-{slug}"
+branch_prefix: ""
+
 # Custom commit message for git init
 init_commit_message: "[Spec Kit] Initial commit"
 
@@ -65,6 +75,10 @@ auto_commit:
     message: "[Spec Kit] Add specification"
 ```
 
+`{author}` is derived from Git config and sanitized for branch names. `{app}` is derived from the Spec Kit init directory name. Custom templates must not put `{slug}` before `{number}`, and must put `{number}-` at the start of the final path segment so generated names remain valid feature branches. For a monorepo project at `apps/web/.specify/`, a template such as `{author}/{app}/{number}-{slug}` produces branches like `jdoe/web/008-guided-tour`.
+
+For simple namespace-only customization, `branch_prefix` is also accepted as a shorthand and expands to `<branch_prefix>/{number}-{slug}`.
+
 ## Installation
 
 ```bash

extensions/git/commands/speckit.git.feature.md

@@ -19,7 +19,7 @@ You **MUST** consider the user input before proceeding (if not empty).
 If the user explicitly provided `GIT_BRANCH_NAME` (e.g., via environment variable, argument, or in their request), pass it through to the script by setting the `GIT_BRANCH_NAME` environment variable before invoking the script. When `GIT_BRANCH_NAME` is set:
 - The script uses the exact value as the branch name, bypassing all prefix/suffix generation
 - `--short-name`, `--number`, and `--timestamp` flags are ignored
-- `FEATURE_NUM` is extracted from the name if it starts with a numeric prefix, otherwise set to the full branch name
+- `FEATURE_NUM` is extracted when the final path segment starts with a numeric or timestamp feature marker (for example `042-name`, `feat/042-name`, or `jdoe/app/042-name`), otherwise set to the full branch name
 
 ## Prerequisites
 
@@ -35,6 +35,19 @@ Determine the branch numbering strategy by checking configuration in this order:
 3. Check `.specify/init-options.json` for `branch_numbering` value (deprecated, backward compatibility — will be removed in a future release)
 4. Default to `sequential` if none of the above exist
 
+## Branch Name Template
+
+Check `.specify/extensions/git/git-config.yml` for an optional `branch_template` value. If it is empty or missing, use the default branch shape `{number}-{slug}`. If it is set, `{slug}` must not appear before `{number}`, its final path segment must start with `{number}-`, and the script expands these tokens:
+
+- `{author}`: sanitized Git config author (`user.name`, falling back to the email local part)
+- `{app}`: sanitized Spec Kit init directory name
+- `{number}`: sequential number or timestamp
+- `{slug}`: generated short branch slug
+
+For monorepos, a template such as `{author}/{app}/{number}-{slug}` creates names like `jdoe/web/008-guided-tour` while preserving per-project feature numbering.
+
+The script also accepts `branch_prefix` as a shorthand for simple namespaces; it expands to `<branch_prefix>/{number}-{slug}`.
+
 ## Execution
 
 Generate a concise short name (2-4 words) for the branch:
@@ -54,6 +67,7 @@ Run the appropriate script based on your platform:
 - Always include the JSON flag (`--json` for Bash, `-Json` for PowerShell) so the output can be parsed reliably
 - You must only ever run this script once per feature
 - The JSON output will contain `BRANCH_NAME` and `FEATURE_NUM`
+- Do not manually expand `branch_template`; the script reads the git extension config and applies it consistently
 
 ## Graceful Degradation
 
@@ -64,5 +78,5 @@ If Git is not installed or the current directory is not a Git repository:
 ## Output
 
 The script outputs JSON with:
-- `BRANCH_NAME`: The branch name (e.g., `003-user-auth` or `20260319-143022-user-auth`)
+- `BRANCH_NAME`: The branch name (e.g., `003-user-auth`, `20260319-143022-user-auth`, or `jdoe/web/003-user-auth`)
 - `FEATURE_NUM`: The numeric or timestamp prefix used

extensions/git/commands/speckit.git.validate.md

@@ -22,24 +22,24 @@ Get the current branch name:
 git rev-parse --abbrev-ref HEAD
 ```
 
-The branch name must match one of these patterns:
+The branch name's final path segment must start with one of these feature markers:
 
-1. **Sequential**: `^[0-9]{3,}-` (e.g., `001-feature-name`, `042-fix-bug`, `1000-big-feature`)
+1. **Sequential**: `[0-9]{3,}-` (e.g., `001-feature-name`, `042-fix-bug`, `1000-big-feature`, `jdoe/web/008-guided-tour`)
-2. **Timestamp**: `^[0-9]{8}-[0-9]{6}-` (e.g., `20260319-143022-feature-name`)
+2. **Timestamp**: `[0-9]{8}-[0-9]{6}-` (e.g., `20260319-143022-feature-name`, `jdoe/web/20260319-143022-feature-name`)
 
 ## Execution
 
 If on a feature branch (matches either pattern):
 - Output: `✓ On feature branch: <branch-name>`
 - Check if the corresponding spec directory exists under `specs/`:
-  - For sequential branches, look for `specs/<prefix>-*` where prefix matches the numeric portion
+  - For sequential branches, look for `specs/<prefix>-*` where prefix matches the numeric portion, regardless of branch namespace prefixes
-  - For timestamp branches, look for `specs/<prefix>-*` where prefix matches the `YYYYMMDD-HHMMSS` portion
+  - For timestamp branches, look for `specs/<prefix>-*` where prefix matches the `YYYYMMDD-HHMMSS` portion, regardless of branch namespace prefixes
 - If spec directory exists: `✓ Spec directory found: <path>`
 - If spec directory missing: `⚠ No spec directory found for prefix <prefix>`
 
 If NOT on a feature branch:
 - Output: `✗ Not on a feature branch. Current branch: <branch-name>`
-- Output: `Feature branches should be named like: 001-feature-name or 20260319-143022-feature-name`
+- Output: `Feature branches should be named like: 001-feature-name, 20260319-143022-feature-name, or <namespace>/001-feature-name`
 
 ## Graceful Degradation
 

extensions/git/config-template.yml

@@ -4,6 +4,16 @@
 # Branch numbering strategy: "sequential" (001, 002, ...) or "timestamp" (YYYYMMDD-HHMMSS)
 branch_numbering: sequential
 
+# Optional branch name template. Leave empty for the default "{number}-{slug}".
+# Supported tokens: {author}, {app}, {number}, {slug}
+# {slug} must not appear before {number}; final path segment must start with {number}-.
+# Example for monorepos: "{author}/{app}/{number}-{slug}"
+branch_template: ""
+
+# Optional shorthand namespace. Leave empty to use branch_template/default behavior.
+# Example: "features/{app}" expands to "features/{app}/{number}-{slug}"
+branch_prefix: ""
+
 # Commit message used by `git commit` during repository initialization
 init_commit_message: "[Spec Kit] Initial commit"
 

extensions/git/extension.yml

@@ -4,7 +4,7 @@ extension:
   id: git
   name: "Git Branching Workflow"
   version: "1.0.0"
-  description: "Feature branch creation, numbering (sequential/timestamp), validation, and Git remote detection"
+  description: "Feature branch creation, numbering (sequential/timestamp), templating, validation, and Git remote detection"
   author: spec-kit-core
   repository: https://github.com/github/spec-kit
   license: MIT
@@ -19,7 +19,7 @@ provides:
   commands:
     - name: speckit.git.feature
       file: commands/speckit.git.feature.md
-      description: "Create a feature branch with sequential or timestamp numbering"
+      description: "Create a feature branch with sequential or timestamp numbering and optional templates"
     - name: speckit.git.validate
       file: commands/speckit.git.validate.md
       description: "Validate current branch follows feature branch naming conventions"
@@ -137,4 +137,6 @@ tags:
 config:
   defaults:
     branch_numbering: sequential
+    branch_template: ""
+    branch_prefix: ""
     init_commit_message: "[Spec Kit] Initial commit"

extensions/git/git-config.yml

@@ -4,6 +4,16 @@
 # Branch numbering strategy: "sequential" (001, 002, ...) or "timestamp" (YYYYMMDD-HHMMSS)
 branch_numbering: sequential
 
+# Optional branch name template. Leave empty for the default "{number}-{slug}".
+# Supported tokens: {author}, {app}, {number}, {slug}
+# {slug} must not appear before {number}; final path segment must start with {number}-.
+# Example for monorepos: "{author}/{app}/{number}-{slug}"
+branch_template: ""
+
+# Optional shorthand namespace. Leave empty to use branch_template/default behavior.
+# Example: "features/{app}" expands to "features/{app}/{number}-{slug}"
+branch_prefix: ""
+
 # Commit message used by `git commit` during repository initialization
 init_commit_message: "[Spec Kit] Initial commit"
 

extensions/git/scripts/bash/create-new-feature-branch.sh

@@ -75,6 +75,10 @@ while [ $i -le $# ]; do
             echo "Environment variables:"
             echo "  GIT_BRANCH_NAME     Use this exact branch name, bypassing all prefix/suffix generation"
             echo ""
+            echo "Configuration:"
+            echo "  branch_template     Optional git-config.yml template with {author}, {app}, {number}, {slug}"
+            echo "  branch_prefix       Optional shorthand namespace expanded before {number}-{slug}"
+            echo ""
             echo "Examples:"
             echo "  $0 'Add user authentication system' --short-name 'user-auth'"
             echo "  $0 'Implement OAuth2 integration for API' --number 5"
@@ -127,16 +131,28 @@ get_highest_from_specs() {
 
 # Function to get highest number from git branches
 get_highest_from_branches() {
-    git branch -a 2>/dev/null | sed -E 's/^[+*][[:space:]]+//; s/^[[:space:]]+//; s|^remotes/[^/]*/||' | _extract_highest_number
+    local scope_prefix="${1:-}"
+    git branch -a 2>/dev/null | sed -E 's/^[+*][[:space:]]+//; s/^[[:space:]]+//; s|^remotes/[^/]*/||' | _extract_highest_number "$scope_prefix"
 }
 
 # Extract the highest sequential feature number from a list of ref names (one per line).
 _extract_highest_number() {
+    local scope_prefix="${1:-}"
     local highest=0
     while IFS= read -r name; do
         [ -z "$name" ] && continue
-        if echo "$name" | grep -Eq '^[0-9]{3,}-' && ! echo "$name" | grep -Eq '^[0-9]{8}-[0-9]{6}-'; then
+        if [ -n "$scope_prefix" ]; then
-            number=$(echo "$name" | grep -Eo '^[0-9]+' || echo "0")
+            case "$name" in
+                "$scope_prefix"*) name="${name#"$scope_prefix"}" ;;
+                *) continue ;;
+            esac
+        fi
+        name="${name##*/}"
+        if echo "$name" | grep -Eq '^[0-9]{3,}-' \
+            && ! echo "$name" | grep -Eq '^[0-9]{8}-[0-9]{6}-' \
+            && ! echo "$name" | grep -Eq '^[0-9]{7}-[0-9]{6}-' \
+            && ! echo "$name" | grep -Eq '^[0-9]{7,8}-[0-9]{6}$'; then
+            number=$(echo "$name" | grep -Eo '^[0-9]{3,}-' | sed -E 's/-$//' || echo "0")
             number=$((10#$number))
             if [ "$number" -gt "$highest" ]; then
                 highest=$number
@@ -148,11 +164,12 @@ _extract_highest_number() {
 
 # Function to get highest number from remote branches without fetching (side-effect-free)
 get_highest_from_remote_refs() {
+    local scope_prefix="${1:-}"
     local highest=0
 
     for remote in $(git remote 2>/dev/null); do
         local remote_highest
-        remote_highest=$(GIT_TERMINAL_PROMPT=0 git ls-remote --heads "$remote" 2>/dev/null | sed 's|.*refs/heads/||' | _extract_highest_number)
+        remote_highest=$(GIT_TERMINAL_PROMPT=0 git ls-remote --heads "$remote" 2>/dev/null | sed 's|.*refs/heads/||' | _extract_highest_number "$scope_prefix")
         if [ "$remote_highest" -gt "$highest" ]; then
             highest=$remote_highest
         fi
@@ -165,16 +182,17 @@ get_highest_from_remote_refs() {
 check_existing_branches() {
     local specs_dir="$1"
     local skip_fetch="${2:-false}"
+    local scope_prefix="${3:-}"
 
     if [ "$skip_fetch" = true ]; then
-        local highest_remote=$(get_highest_from_remote_refs)
+        local highest_remote=$(get_highest_from_remote_refs "$scope_prefix")
-        local highest_branch=$(get_highest_from_branches)
+        local highest_branch=$(get_highest_from_branches "$scope_prefix")
         if [ "$highest_remote" -gt "$highest_branch" ]; then
             highest_branch=$highest_remote
         fi
     else
         git fetch --all --prune >/dev/null 2>&1 || true
-        local highest_branch=$(get_highest_from_branches)
+        local highest_branch=$(get_highest_from_branches "$scope_prefix")
     fi
 
     local highest_spec=$(get_highest_from_specs "$specs_dir")
@@ -273,6 +291,152 @@ fi
 cd "$REPO_ROOT"
 
 SPECS_DIR="$REPO_ROOT/specs"
+CONFIG_FILE="$REPO_ROOT/.specify/extensions/git/git-config.yml"
+
+read_git_config_value() {
+    local key="$1"
+    [ -f "$CONFIG_FILE" ] || return 0
+    grep -E "^[[:space:]]*${key}:" "$CONFIG_FILE" 2>/dev/null \
+        | head -n 1 \
+        | sed -E "s/^[[:space:]]*${key}:[[:space:]]*//" \
+        | sed -E 's/[[:space:]]+#.*$//' \
+        | sed -E 's/^[[:space:]]+|[[:space:]]+$//g' \
+        | sed -E 's/^"//; s/"$//' \
+        | sed -E "s/^'//; s/'$//"
+}
+
+branch_token() {
+    local value="$1"
+    local fallback="$2"
+    local cleaned
+    cleaned=$(clean_branch_name "$value")
+    if [ -n "$cleaned" ]; then
+        printf '%s\n' "$cleaned"
+    else
+        printf '%s\n' "$fallback"
+    fi
+}
+
+get_author_token() {
+    local author=""
+    if command -v git >/dev/null 2>&1; then
+        author=$(git config user.name 2>/dev/null || true)
+        if [ -z "$author" ]; then
+            author=$(git config user.email 2>/dev/null | sed 's/@.*$//' || true)
+        fi
+    fi
+    if [ -z "$author" ]; then
+        author="${USER:-unknown}"
+    fi
+    branch_token "$author" "unknown"
+}
+
+get_app_token() {
+    branch_token "$(basename "$REPO_ROOT")" "app"
+}
+
+resolve_branch_template() {
+    local template
+    local prefix
+    template=$(read_git_config_value "branch_template")
+    if [ -n "$template" ]; then
+        printf '%s\n' "$template"
+        return
+    fi
+
+    prefix=$(read_git_config_value "branch_prefix")
+    if [ -z "$prefix" ]; then
+        printf '%s\n' ""
+        return
+    fi
+    case "$prefix" in
+        */) printf '%s%s\n' "$prefix" "{number}-{slug}" ;;
+        *) printf '%s/%s\n' "$prefix" "{number}-{slug}" ;;
+    esac
+}
+
+render_branch_template() {
+    local template="$1"
+    local feature_num="$2"
+    local branch_suffix="$3"
+    local rendered="$template"
+    rendered=${rendered//\{author\}/$AUTHOR_TOKEN}
+    rendered=${rendered//\{app\}/$APP_TOKEN}
+    rendered=${rendered//\{number\}/$feature_num}
+    rendered=${rendered//\{slug\}/$branch_suffix}
+    printf '%s\n' "$rendered"
+}
+
+validate_branch_template() {
+    local template="$1"
+    [ -n "$template" ] || return 0
+    local feature_segment
+    feature_segment="${template##*/}"
+    case "$template" in
+        *"{number}"*) ;;
+        *)
+            >&2 echo "Error: branch_template must include the {number} token so generated branches remain valid feature branches."
+            exit 1
+            ;;
+    esac
+    case "$template" in
+        *"{slug}"*"{number}"*)
+            >&2 echo "Error: branch_template must not place {slug} before {number}; use {slug} only in the final feature segment."
+            exit 1
+            ;;
+    esac
+    case "$feature_segment" in
+        "{number}-"*) ;;
+        *)
+            >&2 echo "Error: branch_template must put {number}- at the start of the final path segment so generated branches remain valid feature branches."
+            exit 1
+            ;;
+    esac
+}
+
+build_branch_name() {
+    local feature_num="$1"
+    local branch_suffix="$2"
+    if [ -n "$BRANCH_TEMPLATE" ]; then
+        render_branch_template "$BRANCH_TEMPLATE" "$feature_num" "$branch_suffix"
+    else
+        printf '%s-%s\n' "$feature_num" "$branch_suffix"
+    fi
+}
+
+branch_scope_prefix() {
+    local template="$1"
+    local prefix="$template"
+    [ -n "$prefix" ] || return 0
+    case "$prefix" in
+        *"{number}"*) prefix="${prefix%%\{number\}*}" ;;
+        *"{slug}"*) prefix="${prefix%%\{slug\}*}" ;;
+        *) return 0 ;;
+    esac
+    render_branch_template "$prefix" "" "$BRANCH_SUFFIX"
+}
+
+extract_feature_num_from_branch() {
+    local branch_name="$1"
+    local feature_segment="${branch_name##*/}"
+    local match
+    match=$(printf '%s\n' "$feature_segment" | grep -Eo '^[0-9]{8}-[0-9]{6}-' | head -n 1 || true)
+    if [ -n "$match" ]; then
+        printf '%s\n' "$match" | sed -E 's/-$//'
+        return
+    fi
+    match=$(printf '%s\n' "$feature_segment" | grep -Eo '^[0-9]+-' | head -n 1 || true)
+    if [ -n "$match" ]; then
+        printf '%s\n' "$match" | sed -E 's/-$//'
+        return
+    fi
+    printf '%s\n' "$branch_name"
+}
+
+AUTHOR_TOKEN=$(get_author_token)
+APP_TOKEN=$(get_app_token)
+BRANCH_TEMPLATE=$(resolve_branch_template)
+validate_branch_template "$BRANCH_TEMPLATE"
 
 # Function to generate branch name with stop word filtering
 generate_branch_name() {
@@ -318,18 +482,8 @@ generate_branch_name() {
 # Check for GIT_BRANCH_NAME env var override (exact branch name, no prefix/suffix)
 if [ -n "${GIT_BRANCH_NAME:-}" ]; then
     BRANCH_NAME="$GIT_BRANCH_NAME"
-    # Extract FEATURE_NUM from the branch name if it starts with a numeric prefix
+    FEATURE_NUM=$(extract_feature_num_from_branch "$BRANCH_NAME")
-    # Check timestamp pattern first (YYYYMMDD-HHMMSS-) since it also matches the simpler ^[0-9]+ pattern
+    BRANCH_SUFFIX="$BRANCH_NAME"
-    if echo "$BRANCH_NAME" | grep -Eq '^[0-9]{8}-[0-9]{6}-'; then
-        FEATURE_NUM=$(echo "$BRANCH_NAME" | grep -Eo '^[0-9]{8}-[0-9]{6}')
-        BRANCH_SUFFIX="${BRANCH_NAME#${FEATURE_NUM}-}"
-    elif echo "$BRANCH_NAME" | grep -Eq '^[0-9]+-'; then
-        FEATURE_NUM=$(echo "$BRANCH_NAME" | grep -Eo '^[0-9]+')
-        BRANCH_SUFFIX="${BRANCH_NAME#${FEATURE_NUM}-}"
-    else
-        FEATURE_NUM="$BRANCH_NAME"
-        BRANCH_SUFFIX="$BRANCH_NAME"
-    fi
 else
     # Generate branch name
     if [ -n "$SHORT_NAME" ]; then
@@ -347,16 +501,17 @@ else
     # Determine branch prefix
     if [ "$USE_TIMESTAMP" = true ]; then
         FEATURE_NUM=$(date +%Y%m%d-%H%M%S)
-        BRANCH_NAME="${FEATURE_NUM}-${BRANCH_SUFFIX}"
+        BRANCH_NAME=$(build_branch_name "$FEATURE_NUM" "$BRANCH_SUFFIX")
     else
+        BRANCH_SCOPE_PREFIX=$(branch_scope_prefix "$BRANCH_TEMPLATE")
         if [ -z "$BRANCH_NUMBER" ]; then
             if [ "$DRY_RUN" = true ] && [ "$HAS_GIT" = true ]; then
-                BRANCH_NUMBER=$(check_existing_branches "$SPECS_DIR" true)
+                BRANCH_NUMBER=$(check_existing_branches "$SPECS_DIR" true "$BRANCH_SCOPE_PREFIX")
             elif [ "$DRY_RUN" = true ]; then
                 HIGHEST=$(get_highest_from_specs "$SPECS_DIR")
                 BRANCH_NUMBER=$((HIGHEST + 1))
             elif [ "$HAS_GIT" = true ]; then
-                BRANCH_NUMBER=$(check_existing_branches "$SPECS_DIR")
+                BRANCH_NUMBER=$(check_existing_branches "$SPECS_DIR" false "$BRANCH_SCOPE_PREFIX")
             else
                 HIGHEST=$(get_highest_from_specs "$SPECS_DIR")
                 BRANCH_NUMBER=$((HIGHEST + 1))
@@ -364,7 +519,7 @@ else
         fi
 
         FEATURE_NUM=$(printf "%03d" "$((10#$BRANCH_NUMBER))")
-        BRANCH_NAME="${FEATURE_NUM}-${BRANCH_SUFFIX}"
+        BRANCH_NAME=$(build_branch_name "$FEATURE_NUM" "$BRANCH_SUFFIX")
     fi
 fi
 
@@ -376,18 +531,23 @@ if [ -n "${GIT_BRANCH_NAME:-}" ] && [ "$BRANCH_BYTE_LEN" -gt $MAX_BRANCH_LENGTH
     >&2 echo "Error: GIT_BRANCH_NAME must be 244 bytes or fewer in UTF-8. Provided value is ${BRANCH_BYTE_LEN} bytes."
     exit 1
 elif [ "$BRANCH_BYTE_LEN" -gt $MAX_BRANCH_LENGTH ]; then
-    PREFIX_LENGTH=$(( ${#FEATURE_NUM} + 1 ))
-    MAX_SUFFIX_LENGTH=$((MAX_BRANCH_LENGTH - PREFIX_LENGTH))
-
-    TRUNCATED_SUFFIX=$(echo "$BRANCH_SUFFIX" | cut -c1-$MAX_SUFFIX_LENGTH)
-    TRUNCATED_SUFFIX=$(echo "$TRUNCATED_SUFFIX" | sed 's/-$//')
-
     ORIGINAL_BRANCH_NAME="$BRANCH_NAME"
-    BRANCH_NAME="${FEATURE_NUM}-${TRUNCATED_SUFFIX}"
+    TRUNCATED_SUFFIX="$BRANCH_SUFFIX"
+    while [ "$(_byte_length "$BRANCH_NAME")" -gt "$MAX_BRANCH_LENGTH" ] && [ -n "$TRUNCATED_SUFFIX" ]; do
+        TRUNCATED_SUFFIX="${TRUNCATED_SUFFIX%?}"
+        TRUNCATED_SUFFIX="${TRUNCATED_SUFFIX%-}"
+        BRANCH_NAME=$(build_branch_name "$FEATURE_NUM" "$TRUNCATED_SUFFIX")
+    done
+    if [ "$(_byte_length "$BRANCH_NAME")" -gt "$MAX_BRANCH_LENGTH" ]; then
+        >&2 echo "Error: Branch template prefix exceeds GitHub's 244-byte branch name limit."
+        exit 1
+    fi
 
     >&2 echo "[specify] Warning: Branch name exceeded GitHub's 244-byte limit"
-    >&2 echo "[specify] Original: $ORIGINAL_BRANCH_NAME (${#ORIGINAL_BRANCH_NAME} bytes)"
+    ORIGINAL_BRANCH_BYTE_LEN=$(_byte_length "$ORIGINAL_BRANCH_NAME")
-    >&2 echo "[specify] Truncated to: $BRANCH_NAME (${#BRANCH_NAME} bytes)"
+    TRUNCATED_BRANCH_BYTE_LEN=$(_byte_length "$BRANCH_NAME")
+    >&2 echo "[specify] Original: $ORIGINAL_BRANCH_NAME (${ORIGINAL_BRANCH_BYTE_LEN} bytes)"
+    >&2 echo "[specify] Truncated to: $BRANCH_NAME (${TRUNCATED_BRANCH_BYTE_LEN} bytes)"
 fi
 
 if [ "$DRY_RUN" != true ]; then

extensions/git/scripts/bash/git-common.sh

@@ -23,8 +23,9 @@ spec_kit_effective_branch_name() {
 }
 
 # Validate that a branch name matches the expected feature branch pattern.
-# Accepts sequential (###-* with >=3 digits) or timestamp (YYYYMMDD-HHMMSS-*) formats.
+# Accepts sequential (###-* with >=3 digits) or timestamp (YYYYMMDD-HHMMSS-*) formats,
-# Logic aligned with scripts/bash/common.sh check_feature_branch after effective-name normalization.
+# either at the start of the branch or after path-style namespace prefixes.
+# Logic aligned with the git extension's PowerShell Test-FeatureBranch twin.
 check_feature_branch() {
     local raw="$1"
     local has_git_repo="$2"
@@ -37,16 +38,17 @@ check_feature_branch() {
 
     local branch
     branch=$(spec_kit_effective_branch_name "$raw")
+    local feature_segment="${branch##*/}"
 
     # Accept sequential prefix (3+ digits) but exclude malformed timestamps
     # Malformed: 7-or-8 digit date + 6-digit time with no trailing slug (e.g. "2026031-143022" or "20260319-143022")
     local is_sequential=false
-    if [[ "$branch" =~ ^[0-9]{3,}- ]] && [[ ! "$branch" =~ ^[0-9]{7}-[0-9]{6}- ]] && [[ ! "$branch" =~ ^[0-9]{7,8}-[0-9]{6}$ ]]; then
+    if [[ "$feature_segment" =~ ^[0-9]{3,}- ]] && [[ ! "$feature_segment" =~ ^[0-9]{7}-[0-9]{6}- ]] && [[ ! "$feature_segment" =~ ^[0-9]{7,8}-[0-9]{6}$ ]]; then
         is_sequential=true
     fi
-    if [[ "$is_sequential" != "true" ]] && [[ ! "$branch" =~ ^[0-9]{8}-[0-9]{6}- ]]; then
+    if [[ "$is_sequential" != "true" ]] && [[ ! "$feature_segment" =~ ^[0-9]{8}-[0-9]{6}- ]]; then
         echo "ERROR: Not on a feature branch. Current branch: $raw" >&2
-        echo "Feature branches should be named like: 001-feature-name, 1234-feature-name, or 20260319-143022-feature-name" >&2
+        echo "Feature branches should be named like: 001-feature-name, 1234-feature-name, 20260319-143022-feature-name, or <prefix>/001-feature-name" >&2
         return 1
     fi
 

extensions/git/scripts/powershell/create-new-feature-branch.ps1

@@ -34,6 +34,10 @@ if ($Help) {
     Write-Host "Environment variables:"
     Write-Host "  GIT_BRANCH_NAME     Use this exact branch name, bypassing all prefix/suffix generation"
     Write-Host ""
+    Write-Host "Configuration:"
+    Write-Host "  branch_template     Optional git-config.yml template with {author}, {app}, {number}, {slug}"
+    Write-Host "  branch_prefix       Optional shorthand namespace expanded before {number}-{slug}"
+    Write-Host ""
     exit 0
 }
 
@@ -67,11 +71,23 @@ function Get-HighestNumberFromSpecs {
 }
 
 function Get-HighestNumberFromNames {
-    param([string[]]$Names)
+    param(
+        [string[]]$Names,
+        [string]$ScopePrefix = ''
+    )
 
     [long]$highest = 0
     foreach ($name in $Names) {
-        if ($name -match '^(\d{3,})-' -and $name -notmatch '^\d{8}-\d{6}-') {
+        if ($ScopePrefix -and -not $name.StartsWith($ScopePrefix, [System.StringComparison]::Ordinal)) {
+            continue
+        }
+        if ($ScopePrefix) {
+            $name = $name.Substring($ScopePrefix.Length)
+        }
+        $name = ($name -split '/')[-1]
+        $hasTimestampPrefix = $name -match '^\d{8}-\d{6}-'
+        $hasMalformedTimestamp = ($name -match '^\d{7}-\d{6}-') -or ($name -match '^(?:\d{7}|\d{8})-\d{6}$')
+        if ($name -match '^(\d{3,})-' -and -not $hasTimestampPrefix -and -not $hasMalformedTimestamp) {
             [long]$num = 0
             if ([long]::TryParse($matches[1], [ref]$num) -and $num -gt $highest) {
                 $highest = $num
@@ -82,7 +98,7 @@ function Get-HighestNumberFromNames {
 }
 
 function Get-HighestNumberFromBranches {
-    param()
+    param([string]$ScopePrefix = '')
 
     try {
         $branches = git branch -a 2>$null
@@ -90,7 +106,7 @@ function Get-HighestNumberFromBranches {
             $cleanNames = $branches | ForEach-Object {
                 $_.Trim() -replace '^[+*]?\s+', '' -replace '^remotes/[^/]+/', ''
             }
-            return Get-HighestNumberFromNames -Names $cleanNames
+            return Get-HighestNumberFromNames -Names $cleanNames -ScopePrefix $ScopePrefix
         }
     } catch {
         Write-Verbose "Could not check Git branches: $_"
@@ -99,6 +115,8 @@ function Get-HighestNumberFromBranches {
 }
 
 function Get-HighestNumberFromRemoteRefs {
+    param([string]$ScopePrefix = '')
+
     [long]$highest = 0
     try {
         $remotes = git remote 2>$null
@@ -111,7 +129,7 @@ function Get-HighestNumberFromRemoteRefs {
                     $refNames = $refs | ForEach-Object {
                         if ($_ -match 'refs/heads/(.+)$') { $matches[1] }
                     } | Where-Object { $_ }
-                    $remoteHighest = Get-HighestNumberFromNames -Names $refNames
+                    $remoteHighest = Get-HighestNumberFromNames -Names $refNames -ScopePrefix $ScopePrefix
                     if ($remoteHighest -gt $highest) { $highest = $remoteHighest }
                 }
             }
@@ -125,18 +143,19 @@ function Get-HighestNumberFromRemoteRefs {
 function Get-NextBranchNumber {
     param(
         [string]$SpecsDir,
-        [switch]$SkipFetch
+        [switch]$SkipFetch,
+        [string]$ScopePrefix = ''
     )
 
     if ($SkipFetch) {
-        $highestBranch = Get-HighestNumberFromBranches
+        $highestBranch = Get-HighestNumberFromBranches -ScopePrefix $ScopePrefix
-        $highestRemote = Get-HighestNumberFromRemoteRefs
+        $highestRemote = Get-HighestNumberFromRemoteRefs -ScopePrefix $ScopePrefix
         $highestBranch = [Math]::Max($highestBranch, $highestRemote)
     } else {
         try {
             git fetch --all --prune 2>$null | Out-Null
         } catch { }
-        $highestBranch = Get-HighestNumberFromBranches
+        $highestBranch = Get-HighestNumberFromBranches -ScopePrefix $ScopePrefix
     }
 
     $highestSpec = Get-HighestNumberFromSpecs -SpecsDir $SpecsDir
@@ -232,6 +251,145 @@ if (Get-Command Test-HasGit -ErrorAction SilentlyContinue) {
 Set-Location $repoRoot
 
 $specsDir = Join-Path $repoRoot 'specs'
+$configFile = Join-Path $repoRoot ".specify/extensions/git/git-config.yml"
+
+function Read-GitConfigValue {
+    param([string]$Key)
+
+    if (-not (Test-Path -LiteralPath $configFile -PathType Leaf)) { return '' }
+    $escapedKey = [regex]::Escape($Key)
+    foreach ($line in Get-Content -LiteralPath $configFile) {
+        if ($line -match "^\s*$escapedKey\s*:\s*(.*)$") {
+            $val = ($matches[1] -replace '\s+#.*$', '').Trim()
+            $val = $val -replace '^["'']', '' -replace '["'']$', ''
+            return $val
+        }
+    }
+    return ''
+}
+
+function ConvertTo-BranchToken {
+    param(
+        [string]$Value,
+        [string]$Fallback
+    )
+
+    $cleaned = ConvertTo-CleanBranchName -Name $Value
+    if ($cleaned) { return $cleaned }
+    return $Fallback
+}
+
+function Get-GitAuthorToken {
+    $author = ''
+    if (Get-Command git -ErrorAction SilentlyContinue) {
+        try { $author = (git config user.name 2>$null | Out-String).Trim() } catch {}
+        if (-not $author) {
+            try {
+                $email = (git config user.email 2>$null | Out-String).Trim()
+                if ($email) { $author = ($email -split '@')[0] }
+            } catch {}
+        }
+    }
+    if (-not $author) { $author = if ($env:USER) { $env:USER } elseif ($env:USERNAME) { $env:USERNAME } else { 'unknown' } }
+    return ConvertTo-BranchToken -Value $author -Fallback 'unknown'
+}
+
+function Get-AppToken {
+    return ConvertTo-BranchToken -Value (Split-Path $repoRoot -Leaf) -Fallback 'app'
+}
+
+function Resolve-BranchTemplate {
+    $template = Read-GitConfigValue -Key 'branch_template'
+    if ($template) { return $template }
+
+    $prefix = Read-GitConfigValue -Key 'branch_prefix'
+    if (-not $prefix) { return '' }
+    if ($prefix.EndsWith('/')) { return "${prefix}{number}-{slug}" }
+    return "$prefix/{number}-{slug}"
+}
+
+function Expand-BranchTemplate {
+    param(
+        [string]$Template,
+        [string]$FeatureNum,
+        [string]$BranchSuffix
+    )
+
+    $rendered = $Template.Replace('{author}', $authorToken)
+    $rendered = $rendered.Replace('{app}', $appToken)
+    $rendered = $rendered.Replace('{number}', $FeatureNum)
+    $rendered = $rendered.Replace('{slug}', $BranchSuffix)
+    return $rendered
+}
+
+function Assert-BranchTemplateValid {
+    param([string]$Template)
+
+    if ($Template -and -not $Template.Contains('{number}')) {
+        throw "branch_template must include the {number} token so generated branches remain valid feature branches."
+    }
+    if ($Template) {
+        $numberIndex = $Template.IndexOf('{number}', [System.StringComparison]::Ordinal)
+        $slugIndex = $Template.IndexOf('{slug}', [System.StringComparison]::Ordinal)
+        if ($slugIndex -ge 0 -and $slugIndex -lt $numberIndex) {
+            throw "branch_template must not place {slug} before {number}; use {slug} only in the final feature segment."
+        }
+        $featureSegment = ($Template -split '/')[-1]
+        if (-not $featureSegment.StartsWith('{number}-', [System.StringComparison]::Ordinal)) {
+            throw "branch_template must put {number}- at the start of the final path segment so generated branches remain valid feature branches."
+        }
+    }
+}
+
+function New-BranchName {
+    param(
+        [string]$FeatureNum,
+        [string]$BranchSuffix
+    )
+
+    if ($branchTemplate) {
+        return Expand-BranchTemplate -Template $branchTemplate -FeatureNum $FeatureNum -BranchSuffix $BranchSuffix
+    }
+    return "$FeatureNum-$BranchSuffix"
+}
+
+function Get-BranchScopePrefix {
+    param(
+        [string]$Template,
+        [string]$BranchSuffix
+    )
+
+    if (-not $Template) { return '' }
+    $numberIndex = $Template.IndexOf('{number}', [System.StringComparison]::Ordinal)
+    $slugIndex = $Template.IndexOf('{slug}', [System.StringComparison]::Ordinal)
+    $indexes = @($numberIndex, $slugIndex) | Where-Object { $_ -ge 0 } | Sort-Object
+    if (-not $indexes) { return '' }
+    $prefix = $Template.Substring(0, $indexes[0])
+    return Expand-BranchTemplate -Template $prefix -FeatureNum '' -BranchSuffix $BranchSuffix
+}
+
+function Get-FeatureNumberFromBranchName {
+    param([string]$BranchName)
+
+    $featureSegment = ($BranchName -split '/')[-1]
+    if ($featureSegment -match '^(\d{8}-\d{6})-') {
+        return $matches[1]
+    }
+    if ($featureSegment -match '^(\d+)-') {
+        return $matches[1]
+    }
+    return $BranchName
+}
+
+function Get-Utf8ByteCount {
+    param([string]$Value)
+    return [System.Text.Encoding]::UTF8.GetByteCount($Value)
+}
+
+$authorToken = Get-GitAuthorToken
+$appToken = Get-AppToken
+$branchTemplate = Resolve-BranchTemplate
+Assert-BranchTemplateValid -Template $branchTemplate
 
 function Get-BranchName {
     param([string]$Description)
@@ -276,19 +434,11 @@ function Get-BranchName {
 if ($env:GIT_BRANCH_NAME) {
     $branchName = $env:GIT_BRANCH_NAME
     # Check 244-byte limit (UTF-8) for override names
-    $branchNameUtf8ByteCount = [System.Text.Encoding]::UTF8.GetByteCount($branchName)
+    $branchNameUtf8ByteCount = Get-Utf8ByteCount -Value $branchName
     if ($branchNameUtf8ByteCount -gt 244) {
         throw "GIT_BRANCH_NAME must be 244 bytes or fewer in UTF-8. Provided value is $branchNameUtf8ByteCount bytes; please supply a shorter override branch name."
     }
-    # Extract FEATURE_NUM from the branch name if it starts with a numeric prefix
+    $featureNum = Get-FeatureNumberFromBranchName -BranchName $branchName
-    # Check timestamp pattern first (YYYYMMDD-HHMMSS-) since it also matches the simpler ^\d+ pattern
-    if ($branchName -match '^(\d{8}-\d{6})-') {
-        $featureNum = $matches[1]
-    } elseif ($branchName -match '^(\d+)-') {
-        $featureNum = $matches[1]
-    } else {
-        $featureNum = $branchName
-    }
 } else {
     if ($ShortName) {
         $branchSuffix = ConvertTo-CleanBranchName -Name $ShortName
@@ -303,39 +453,41 @@ if ($env:GIT_BRANCH_NAME) {
 
     if ($Timestamp) {
         $featureNum = Get-Date -Format 'yyyyMMdd-HHmmss'
-        $branchName = "$featureNum-$branchSuffix"
+        $branchName = New-BranchName -FeatureNum $featureNum -BranchSuffix $branchSuffix
     } else {
+        $branchScopePrefix = Get-BranchScopePrefix -Template $branchTemplate -BranchSuffix $branchSuffix
         if ($Number -eq 0) {
             if ($DryRun -and $hasGit) {
-                $Number = Get-NextBranchNumber -SpecsDir $specsDir -SkipFetch
+                $Number = Get-NextBranchNumber -SpecsDir $specsDir -SkipFetch -ScopePrefix $branchScopePrefix
             } elseif ($DryRun) {
                 $Number = (Get-HighestNumberFromSpecs -SpecsDir $specsDir) + 1
             } elseif ($hasGit) {
-                $Number = Get-NextBranchNumber -SpecsDir $specsDir
+                $Number = Get-NextBranchNumber -SpecsDir $specsDir -ScopePrefix $branchScopePrefix
             } else {
                 $Number = (Get-HighestNumberFromSpecs -SpecsDir $specsDir) + 1
             }
         }
 
         $featureNum = ('{0:000}' -f $Number)
-        $branchName = "$featureNum-$branchSuffix"
+        $branchName = New-BranchName -FeatureNum $featureNum -BranchSuffix $branchSuffix
     }
 }
 
 $maxBranchLength = 244
-if ($branchName.Length -gt $maxBranchLength) {
+if ((Get-Utf8ByteCount -Value $branchName) -gt $maxBranchLength) {
-    $prefixLength = $featureNum.Length + 1
-    $maxSuffixLength = $maxBranchLength - $prefixLength
-
-    $truncatedSuffix = $branchSuffix.Substring(0, [Math]::Min($branchSuffix.Length, $maxSuffixLength))
-    $truncatedSuffix = $truncatedSuffix -replace '-$', ''
-
     $originalBranchName = $branchName
-    $branchName = "$featureNum-$truncatedSuffix"
+    $truncatedSuffix = $branchSuffix
+    while ((Get-Utf8ByteCount -Value $branchName) -gt $maxBranchLength -and $truncatedSuffix.Length -gt 0) {
+        $truncatedSuffix = $truncatedSuffix.Substring(0, $truncatedSuffix.Length - 1) -replace '-$', ''
+        $branchName = New-BranchName -FeatureNum $featureNum -BranchSuffix $truncatedSuffix
+    }
+    if ((Get-Utf8ByteCount -Value $branchName) -gt $maxBranchLength) {
+        throw "Branch template prefix exceeds GitHub's 244-byte branch name limit."
+    }
 
     Write-Warning "[specify] Branch name exceeded GitHub's 244-byte limit"
-    Write-Warning "[specify] Original: $originalBranchName ($($originalBranchName.Length) bytes)"
+    Write-Warning "[specify] Original: $originalBranchName ($(Get-Utf8ByteCount -Value $originalBranchName) bytes)"
-    Write-Warning "[specify] Truncated to: $branchName ($($branchName.Length) bytes)"
+    Write-Warning "[specify] Truncated to: $branchName ($(Get-Utf8ByteCount -Value $branchName) bytes)"
 }
 
 if (-not $DryRun) {

extensions/git/scripts/powershell/git-common.ps1

@@ -37,14 +37,15 @@ function Test-FeatureBranch {
 
     $raw = $Branch
     $Branch = Get-SpecKitEffectiveBranchName $raw
+    $featureSegment = ($Branch -split '/')[-1]
 
-    # Accept sequential prefix (3+ digits) but exclude malformed timestamps
+    # Accept sequential prefix (3+ digits), at the start or after namespace
-    # Malformed: 7-or-8 digit date + 6-digit time with no trailing slug (e.g. "2026031-143022" or "20260319-143022")
+    # segments, but exclude malformed timestamps.
-    $hasMalformedTimestamp = ($Branch -match '^[0-9]{7}-[0-9]{6}-') -or ($Branch -match '^(?:\d{7}|\d{8})-\d{6}$')
+    $hasMalformedTimestamp = ($featureSegment -match '^[0-9]{7}-[0-9]{6}-') -or ($featureSegment -match '^(?:\d{7}|\d{8})-\d{6}$')
-    $isSequential = ($Branch -match '^[0-9]{3,}-') -and (-not $hasMalformedTimestamp)
+    $isSequential = ($featureSegment -match '^[0-9]{3,}-') -and (-not $hasMalformedTimestamp)
-    if (-not $isSequential -and $Branch -notmatch '^\d{8}-\d{6}-') {
+    if (-not $isSequential -and $featureSegment -notmatch '^\d{8}-\d{6}-') {
         [Console]::Error.WriteLine("ERROR: Not on a feature branch. Current branch: $raw")
-        [Console]::Error.WriteLine("Feature branches should be named like: 001-feature-name, 1234-feature-name, or 20260319-143022-feature-name")
+        [Console]::Error.WriteLine("Feature branches should be named like: 001-feature-name, 1234-feature-name, 20260319-143022-feature-name, or <prefix>/001-feature-name")
         return $false
     }
     return $true

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "specify-cli"
-version = "0.12.4.dev0"
+version = "0.12.6"
 description = "Specify CLI, part of GitHub Spec Kit. A tool to bootstrap your projects for Spec-Driven Development (SDD)."
 readme = "README.md"
 requires-python = ">=3.11"

scripts/python/check_prerequisites.py

@@ -0,0 +1,207 @@
+#!/usr/bin/env python3
+"""Consolidated prerequisite checking script."""
+
+from __future__ import annotations
+
+import json
+import sys
+from dataclasses import dataclass
+from pathlib import Path
+
+try:
+    from common import FeaturePaths, format_speckit_command, get_feature_paths
+except ImportError:  # pragma: no cover - direct execution from unusual cwd
+    sys.path.insert(0, str(Path(__file__).resolve().parent))
+    from common import FeaturePaths, format_speckit_command, get_feature_paths
+
+
+def _json_line(payload: object) -> str:
+    return json.dumps(payload, ensure_ascii=False, separators=(",", ":")) + "\n"
+
+
+HELP_TEXT = """Usage: check_prerequisites.py [OPTIONS]
+
+Consolidated prerequisite checking for Spec-Driven Development workflow.
+
+OPTIONS:
+  --json              Output in JSON format
+  --require-tasks     Require tasks.md to exist (for implementation phase)
+  --include-tasks     Include tasks.md in AVAILABLE_DOCS list
+  --paths-only        Only output path variables (no prerequisite validation)
+  --help, -h          Show this help message
+
+EXAMPLES:
+  # Check task prerequisites (plan.md required)
+  ./check_prerequisites.py --json
+
+  # Check implementation prerequisites (plan.md + tasks.md required)
+  ./check_prerequisites.py --json --require-tasks --include-tasks
+
+  # Get feature paths only (no validation)
+  ./check_prerequisites.py --paths-only
+
+"""
+
+
+@dataclass(frozen=True)
+class Args:
+    json_mode: bool = False
+    require_tasks: bool = False
+    include_tasks: bool = False
+    paths_only: bool = False
+
+
+def _parse_args(argv: list[str]) -> Args:
+    json_mode = False
+    require_tasks = False
+    include_tasks = False
+    paths_only = False
+
+    for arg in argv:
+        if arg == "--json":
+            json_mode = True
+        elif arg == "--require-tasks":
+            require_tasks = True
+        elif arg == "--include-tasks":
+            include_tasks = True
+        elif arg == "--paths-only":
+            paths_only = True
+        elif arg in {"--help", "-h"}:
+            sys.stdout.write(HELP_TEXT)
+            raise SystemExit(0)
+        else:
+            print(
+                f"ERROR: Unknown option '{arg}'. Use --help for usage information.",
+                file=sys.stderr,
+            )
+            raise SystemExit(1)
+
+    return Args(
+        json_mode=json_mode,
+        require_tasks=require_tasks,
+        include_tasks=include_tasks,
+        paths_only=paths_only,
+    )
+
+
+def _dir_has_entries(path: Path) -> bool:
+    try:
+        return path.is_dir() and any(path.iterdir())
+    except OSError:
+        return False
+
+
+def _available_docs(paths: FeaturePaths, include_tasks: bool) -> list[str]:
+    docs: list[str] = []
+    if paths.research.is_file():
+        docs.append("research.md")
+    if paths.data_model.is_file():
+        docs.append("data-model.md")
+    if _dir_has_entries(paths.contracts_dir):
+        docs.append("contracts/")
+    if paths.quickstart.is_file():
+        docs.append("quickstart.md")
+    if include_tasks and paths.tasks.is_file():
+        docs.append("tasks.md")
+    return docs
+
+
+def _print_paths_only(paths: FeaturePaths, json_mode: bool) -> None:
+    if json_mode:
+        sys.stdout.write(
+            _json_line(
+                {
+                    "REPO_ROOT": str(paths.repo_root),
+                    "BRANCH": paths.current_branch,
+                    "FEATURE_DIR": str(paths.feature_dir),
+                    "FEATURE_SPEC": str(paths.feature_spec),
+                    "IMPL_PLAN": str(paths.impl_plan),
+                    "TASKS": str(paths.tasks),
+                }
+            )
+        )
+        return
+
+    print(f"REPO_ROOT: {paths.repo_root}")
+    print(f"BRANCH: {paths.current_branch}")
+    print(f"FEATURE_DIR: {paths.feature_dir}")
+    print(f"FEATURE_SPEC: {paths.feature_spec}")
+    print(f"IMPL_PLAN: {paths.impl_plan}")
+    print(f"TASKS: {paths.tasks}")
+
+
+def _check_file(path: Path, description: str) -> None:
+    marker = "✓" if path.is_file() else "✗"
+    print(f"  {marker} {description}")
+
+
+def _check_dir(path: Path, description: str) -> None:
+    marker = "✓" if _dir_has_entries(path) else "✗"
+    print(f"  {marker} {description}")
+
+
+def _print_text_results(paths: FeaturePaths, include_tasks: bool) -> None:
+    print(f"FEATURE_DIR:{paths.feature_dir}")
+    print("AVAILABLE_DOCS:")
+    _check_file(paths.research, "research.md")
+    _check_file(paths.data_model, "data-model.md")
+    _check_dir(paths.contracts_dir, "contracts/")
+    _check_file(paths.quickstart, "quickstart.md")
+    if include_tasks:
+        _check_file(paths.tasks, "tasks.md")
+
+
+def main(argv: list[str] | None = None) -> int:
+    args = _parse_args(list(argv if argv is not None else sys.argv[1:]))
+
+    try:
+        paths = get_feature_paths(
+            no_persist=args.paths_only,
+            script_file=Path(__file__),
+        )
+    except SystemExit as exc:
+        if exc.code == 0:
+            return 0
+        print("ERROR: Failed to resolve feature paths", file=sys.stderr)
+        return int(exc.code) if isinstance(exc.code, int) else 1
+
+    if args.paths_only:
+        _print_paths_only(paths, args.json_mode)
+        return 0
+
+    if not paths.feature_dir.is_dir():
+        print(f"ERROR: Feature directory not found: {paths.feature_dir}", file=sys.stderr)
+        print(
+            f"Run {format_speckit_command('specify', paths.repo_root)} first to create the feature structure.",
+            file=sys.stderr,
+        )
+        return 1
+
+    if not paths.impl_plan.is_file():
+        print(f"ERROR: plan.md not found in {paths.feature_dir}", file=sys.stderr)
+        print(
+            f"Run {format_speckit_command('plan', paths.repo_root)} first to create the implementation plan.",
+            file=sys.stderr,
+        )
+        return 1
+
+    if args.require_tasks and not paths.tasks.is_file():
+        print(f"ERROR: tasks.md not found in {paths.feature_dir}", file=sys.stderr)
+        print(
+            f"Run {format_speckit_command('tasks', paths.repo_root)} first to create the task list.",
+            file=sys.stderr,
+        )
+        return 1
+
+    docs = _available_docs(paths, args.include_tasks)
+    if args.json_mode:
+        sys.stdout.write(
+            _json_line({"FEATURE_DIR": str(paths.feature_dir), "AVAILABLE_DOCS": docs})
+        )
+    else:
+        _print_text_results(paths, args.include_tasks)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

scripts/python/common.py

@@ -0,0 +1,210 @@
+"""Shared helpers for Spec Kit Python scripts."""
+
+from __future__ import annotations
+
+import json
+import os
+import sys
+from dataclasses import dataclass
+from pathlib import Path
+
+
+def _trim_trailing_separators(value: Path) -> str:
+    text = str(value)
+    while len(text) > 1 and text.endswith((os.sep, "/")):
+        text = text[:-1]
+    return text
+
+
+def find_specify_root(start_dir: Path | None = None) -> Path | None:
+    current = (start_dir or Path.cwd()).resolve()
+    while True:
+        if (current / ".specify").is_dir():
+            return current
+        parent = current.parent
+        if parent == current:
+            return None
+        current = parent
+
+
+def resolve_specify_init_dir() -> Path:
+    raw = os.environ.get("SPECIFY_INIT_DIR", "")
+    candidate = Path(raw)
+    if not candidate.is_absolute():
+        candidate = Path.cwd() / candidate
+    try:
+        init_root = candidate.resolve(strict=True)
+    except OSError:
+        print(
+            f"ERROR: SPECIFY_INIT_DIR does not point to an existing directory: {raw}",
+            file=sys.stderr,
+        )
+        raise SystemExit(1)
+    if not init_root.is_dir():
+        print(
+            f"ERROR: SPECIFY_INIT_DIR does not point to an existing directory: {raw}",
+            file=sys.stderr,
+        )
+        raise SystemExit(1)
+    if not (init_root / ".specify").is_dir():
+        print(
+            "ERROR: SPECIFY_INIT_DIR is not a Spec Kit project "
+            f"(no .specify/ directory): {init_root}",
+            file=sys.stderr,
+        )
+        raise SystemExit(1)
+    return init_root
+
+
+def get_repo_root(script_file: Path | None = None) -> Path:
+    if os.environ.get("SPECIFY_INIT_DIR"):
+        return resolve_specify_init_dir()
+
+    specify_root = find_specify_root()
+    if specify_root is not None:
+        return specify_root
+
+    if script_file is not None:
+        script_root = find_specify_root(script_file.resolve().parent)
+        if script_root is not None:
+            return script_root
+
+        # Installed scripts live at .specify/scripts/python/<script>.py.
+        return script_file.resolve().parents[3]
+    return Path.cwd().resolve()
+
+
+def get_current_branch() -> str:
+    return os.environ.get("SPECIFY_FEATURE", "")
+
+
+def read_feature_json_feature_directory(repo_root: Path) -> str:
+    feature_json = repo_root / ".specify" / "feature.json"
+    if not feature_json.is_file():
+        return ""
+    try:
+        data = json.loads(feature_json.read_text(encoding="utf-8"))
+    except (OSError, json.JSONDecodeError):
+        return ""
+    value = data.get("feature_directory") if isinstance(data, dict) else None
+    return value if isinstance(value, str) else ""
+
+
+def _json_dump(data: dict[str, str]) -> str:
+    return json.dumps(data, ensure_ascii=False, separators=(",", ":")) + "\n"
+
+
+def persist_feature_json(repo_root: Path, feature_dir_value: str) -> None:
+    value = feature_dir_value
+    try:
+        relative = Path(value)
+        if relative.is_absolute():
+            try:
+                value = relative.resolve().relative_to(repo_root.resolve()).as_posix()
+            except ValueError:
+                value = str(relative)
+    except OSError:
+        pass
+
+    current = read_feature_json_feature_directory(repo_root)
+    if current == value:
+        return
+
+    specify_dir = repo_root / ".specify"
+    specify_dir.mkdir(parents=True, exist_ok=True)
+    (specify_dir / "feature.json").write_text(
+        _json_dump({"feature_directory": value}),
+        encoding="utf-8",
+    )
+
+
+@dataclass(frozen=True)
+class FeaturePaths:
+    repo_root: Path
+    current_branch: str
+    feature_dir: Path
+    feature_spec: Path
+    impl_plan: Path
+    tasks: Path
+    research: Path
+    data_model: Path
+    quickstart: Path
+    contracts_dir: Path
+
+
+def get_feature_paths(
+    *, no_persist: bool = False, script_file: Path | None = None
+) -> FeaturePaths:
+    repo_root = get_repo_root(script_file)
+    current_branch = get_current_branch()
+
+    feature_dir_raw = os.environ.get("SPECIFY_FEATURE_DIRECTORY", "")
+    if feature_dir_raw:
+        feature_dir = Path(feature_dir_raw)
+        if not feature_dir.is_absolute():
+            feature_dir = repo_root / feature_dir
+        if not no_persist:
+            persist_feature_json(repo_root, feature_dir_raw)
+    elif (repo_root / ".specify" / "feature.json").is_file():
+        stored = read_feature_json_feature_directory(repo_root)
+        if not stored:
+            print(
+                "ERROR: Feature directory not found. Set SPECIFY_FEATURE_DIRECTORY "
+                "or ensure .specify/feature.json contains feature_directory.",
+                file=sys.stderr,
+            )
+            raise SystemExit(1)
+        feature_dir = Path(stored)
+        if not feature_dir.is_absolute():
+            feature_dir = repo_root / feature_dir
+    else:
+        print(
+            "ERROR: Feature directory not found. Set SPECIFY_FEATURE_DIRECTORY "
+            "or run the specify command to create .specify/feature.json.",
+            file=sys.stderr,
+        )
+        raise SystemExit(1)
+
+    if not current_branch:
+        current_branch = Path(_trim_trailing_separators(feature_dir)).name
+
+    return FeaturePaths(
+        repo_root=repo_root,
+        current_branch=current_branch,
+        feature_dir=feature_dir,
+        feature_spec=feature_dir / "spec.md",
+        impl_plan=feature_dir / "plan.md",
+        tasks=feature_dir / "tasks.md",
+        research=feature_dir / "research.md",
+        data_model=feature_dir / "data-model.md",
+        quickstart=feature_dir / "quickstart.md",
+        contracts_dir=feature_dir / "contracts",
+    )
+
+
+def get_invoke_separator(repo_root: Path) -> str:
+    integration_json = repo_root / ".specify" / "integration.json"
+    if not integration_json.is_file():
+        return "."
+    try:
+        state = json.loads(integration_json.read_text(encoding="utf-8"))
+        key = state.get("default_integration") or state.get("integration") or ""
+        settings = state.get("integration_settings")
+        if isinstance(key, str) and isinstance(settings, dict):
+            entry = settings.get(key)
+            if isinstance(entry, dict) and entry.get("invoke_separator") in {".", "-"}:
+                return entry["invoke_separator"]
+    except (OSError, json.JSONDecodeError):
+        pass
+    return "."
+
+
+def format_speckit_command(command_name: str, repo_root: Path) -> str:
+    separator = get_invoke_separator(repo_root)
+    name = command_name.lstrip("/")
+    if name.startswith("speckit."):
+        name = name[len("speckit.") :]
+    elif name.startswith("speckit-"):
+        name = name[len("speckit-") :]
+    name = name.replace(".", separator)
+    return f"/speckit{separator}{name}"

src/specify_cli/agents.py

@@ -148,7 +148,9 @@ class CommandRegistrar:
         )
         return f"---\n{yaml_str}---\n"
 
-    def _adjust_script_paths(self, frontmatter: dict) -> dict:
+    def _adjust_script_paths(
+        self, frontmatter: dict, extension_id: Optional[str] = None
+    ) -> dict:
         """Normalize script paths in frontmatter to generated project locations.
 
         Rewrites known repo-relative and top-level script paths under the
@@ -158,6 +160,7 @@ class CommandRegistrar:
 
         Args:
             frontmatter: Frontmatter dictionary
+            extension_id: Extension id when rendering extension-owned commands.
 
         Returns:
             Modified frontmatter with normalized project paths
@@ -168,11 +171,15 @@ class CommandRegistrar:
         if isinstance(scripts, dict):
             for key, script_path in scripts.items():
                 if isinstance(script_path, str):
-                    scripts[key] = self.rewrite_project_relative_paths(script_path)
+                    scripts[key] = self.rewrite_project_relative_paths(
+                        script_path, extension_id=extension_id
+                    )
         return frontmatter
 
     @staticmethod
-    def rewrite_project_relative_paths(text: str) -> str:
+    def rewrite_project_relative_paths(
+        text: str, extension_id: Optional[str] = None
+    ) -> str:
         """Rewrite repo-relative paths to their generated project locations."""
         if not isinstance(text, str) or not text:
             return text
@@ -184,10 +191,18 @@ class CommandRegistrar:
         ):
             text = text.replace(old, new)
 
-        # Only rewrite top-level style references so extension-local paths like
+        # Only rewrite top-level style references so existing generated paths
-        # ".specify/extensions/<ext>/scripts/..." remain intact.
+        # like ".specify/extensions/<ext>/scripts/..." remain intact. When
+        # rendering extension commands, top-level "scripts/" is extension-local.
+        scripts_replacement = (
+            f".specify/extensions/{extension_id}/scripts/"
+            if extension_id
+            else ".specify/scripts/"
+        )
         text = re.sub(r'(^|[\s`"\'(])(?:\.?/)?memory/', r"\1.specify/memory/", text)
-        text = re.sub(r'(^|[\s`"\'(])(?:\.?/)?scripts/', r"\1.specify/scripts/", text)
+        text = re.sub(
+            r'(^|[\s`"\'(])(?:\.?/)?scripts/', rf"\1{scripts_replacement}", text
+        )
         text = re.sub(
             r'(^|[\s`"\'(])(?:\.?/)?templates/', r"\1.specify/templates/", text
         )
@@ -312,6 +327,7 @@ class CommandRegistrar:
         source_id: str,
         source_file: str,
         project_root: Path,
+        extension_id: Optional[str] = None,
     ) -> str:
         """Render a command override as a SKILL.md file.
 
@@ -331,7 +347,7 @@ class CommandRegistrar:
         agent_config = self.AGENT_CONFIGS.get(agent_name, {})
         if agent_config.get("extension") == "/SKILL.md":
             body = self.resolve_skill_placeholders(
-                agent_name, frontmatter, body, project_root
+                agent_name, frontmatter, body, project_root, extension_id=extension_id
             )
 
         description = frontmatter.get(
@@ -393,7 +409,11 @@ class CommandRegistrar:
 
     @staticmethod
     def resolve_skill_placeholders(
-        agent_name: str, frontmatter: dict, body: str, project_root: Path
+        agent_name: str,
+        frontmatter: dict,
+        body: str,
+        project_root: Path,
+        extension_id: Optional[str] = None,
     ) -> str:
         """Resolve script placeholders for skills-backed agents."""
         if not isinstance(frontmatter, dict):
@@ -433,7 +453,9 @@ class CommandRegistrar:
 
         body = body.replace("{ARGS}", "$ARGUMENTS").replace("__AGENT__", agent_name)
 
-        return CommandRegistrar.rewrite_project_relative_paths(body)
+        return CommandRegistrar.rewrite_project_relative_paths(
+            body, extension_id=extension_id
+        )
 
     def _convert_argument_placeholder(
         self, content: str, from_placeholder: str, to_placeholder: str
@@ -528,6 +550,7 @@ class CommandRegistrar:
         context_note: str = None,
         _resolved_dir: Path = None,
         link_outputs: bool = False,
+        extension_id: Optional[str] = None,
     ) -> List[str]:
         """Register commands for a specific agent.
 
@@ -545,6 +568,7 @@ class CommandRegistrar:
             link_outputs: If True, write rendered output to a source-local
                 dev cache and symlink the agent command file to it. Falls back
                 to a normal file write when symlinks are unavailable.
+            extension_id: Extension id when rendering extension-owned commands.
 
         Returns:
             List of registered command names
@@ -614,7 +638,9 @@ class CommandRegistrar:
                         frontmatter[key] = core_frontmatter[key]
                 frontmatter.pop("strategy", None)
 
-            frontmatter = self._adjust_script_paths(frontmatter)
+            frontmatter = self._adjust_script_paths(
+                frontmatter, extension_id=extension_id
+            )
 
             for key in agent_config.get("strip_frontmatter_keys", []):
                 frontmatter.pop(key, None)
@@ -653,10 +679,11 @@ class CommandRegistrar:
                     source_id,
                     cmd_file,
                     project_root,
+                    extension_id=extension_id,
                 )
             elif agent_config["format"] == "markdown":
                 body = self.resolve_skill_placeholders(
-                    agent_name, frontmatter, body, project_root
+                    agent_name, frontmatter, body, project_root, extension_id=extension_id
                 )
                 body = self._convert_argument_placeholder(
                     body, "$ARGUMENTS", agent_config["args"]
@@ -666,7 +693,7 @@ class CommandRegistrar:
                 )
             elif agent_config["format"] == "toml":
                 body = self.resolve_skill_placeholders(
-                    agent_name, frontmatter, body, project_root
+                    agent_name, frontmatter, body, project_root, extension_id=extension_id
                 )
                 body = self._convert_argument_placeholder(
                     body, "$ARGUMENTS", agent_config["args"]
@@ -721,6 +748,7 @@ class CommandRegistrar:
                             source_id,
                             cmd_file,
                             project_root,
+                            extension_id=extension_id,
                         )
                     elif agent_config["format"] == "markdown":
                         alias_output = self.render_markdown_command(
@@ -750,6 +778,7 @@ class CommandRegistrar:
                             source_id,
                             cmd_file,
                             project_root,
+                            extension_id=extension_id,
                         )
 
                 alias_file = (
@@ -881,6 +910,7 @@ class CommandRegistrar:
         context_note: str = None,
         link_outputs: bool = False,
         create_missing_active_skills_dir: bool = False,
+        extension_id: Optional[str] = None,
     ) -> Dict[str, List[str]]:
         """Register commands for all detected agents in the project.
 
@@ -897,6 +927,7 @@ class CommandRegistrar:
                 Recovery requires active skills mode (or Kimi's existing native
                 skills directory) and is skipped when safe resolution or
                 creation fails.
+            extension_id: Extension id when rendering extension-owned commands.
 
         Returns:
             Dictionary mapping agent names to list of registered commands
@@ -999,6 +1030,7 @@ class CommandRegistrar:
                         context_note=context_note,
                         _resolved_dir=agent_dir,
                         link_outputs=link_outputs,
+                        extension_id=extension_id,
                     )
                     if registered:
                         results[agent_name] = registered
@@ -1023,6 +1055,7 @@ class CommandRegistrar:
         project_root: Path,
         context_note: Optional[str] = None,
         link_outputs: bool = False,
+        extension_id: Optional[str] = None,
     ) -> Dict[str, List[str]]:
         """Register commands for all non-skill agents in the project.
 
@@ -1038,6 +1071,7 @@ class CommandRegistrar:
             context_note: Custom context comment for markdown output
             link_outputs: If True, create dev-mode symlinks for rendered
                 command files when supported by the OS.
+            extension_id: Extension id when rendering extension-owned commands.
 
         Returns:
             Dictionary mapping agent names to list of registered commands
@@ -1066,6 +1100,7 @@ class CommandRegistrar:
                         context_note=context_note,
                         _resolved_dir=agent_dir,
                         link_outputs=link_outputs,
+                        extension_id=extension_id,
                     )
                     if registered:
                         results[agent_name] = registered

src/specify_cli/bundler/commands_impl/catalog_config.py

@@ -95,7 +95,11 @@ 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()
+    try:
+        scheme = urlparse(url).scheme.lower()
+    except ValueError:
+        # Malformed URLs (e.g. an unclosed IPv6 bracket) are not local paths.
+        return False
     return scheme not in _REMOTE_SCHEMES
 
 
@@ -137,7 +141,10 @@ def add_source(
     url = url.strip()
     if not url:
         raise BundlerError("A catalog url is required.")
-    parsed = urlparse(url)
+    try:
+        parsed = urlparse(url)
+    except ValueError as exc:
+        raise BundlerError(f"Invalid catalog url: '{url}'.") from exc
     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
@@ -148,6 +155,20 @@ def add_source(
             f"Unsupported catalog url scheme '{parsed.scheme}://' in '{url}'. "
             "Use http(s)://, file://, builtin://, or a local path."
         )
+    if parsed.scheme.lower() in {"http", "https"}:
+        # Mirror specify_cli.catalogs._validate_catalog_url (#3209/#3210):
+        # HTTPS only (HTTP just for localhost), and check hostname, not
+        # netloc — netloc is truthy for host-less URLs like "https://:8080"
+        # or "https://user@". Validating here keeps junk out of
+        # bundle-catalogs.yml instead of failing later at fetch time.
+        is_localhost = parsed.hostname in ("localhost", "127.0.0.1", "::1")
+        if parsed.scheme.lower() != "https" and not is_localhost:
+            raise BundlerError(
+                f"Catalog url must use HTTPS (got {parsed.scheme}://). "
+                "HTTP is only allowed for localhost."
+            )
+        if not parsed.hostname:
+            raise BundlerError(f"Catalog url must be a valid URL with a host: {url}")
 
     url = _canonicalize_url(url)
     install_policy = InstallPolicy.parse(policy)

src/specify_cli/bundler/services/adapters.py

@@ -75,7 +75,11 @@ def _validate_remote_url(source_id: str, url: str) -> None:
             f"Catalog '{source_id}' URL must use HTTPS (got {parsed.scheme}://). "
             "HTTP is only allowed for localhost."
         )
-    if not parsed.netloc:
+    # Check hostname, not netloc: netloc is truthy for host-less URLs like
+    # "https://:8080" or "https://user@...", so requiring netloc would let
+    # those through even though they carry no host. hostname is None in those
+    # cases. Mirrors the fix in ``specify_cli.catalogs`` (#3210).
+    if not parsed.hostname:
         raise BundlerError(
             f"Catalog '{source_id}' URL must be a valid URL with a host: {url}"
         )

src/specify_cli/bundler/services/catalog_stack.py

@@ -88,17 +88,25 @@ class CatalogStack:
         Results are sorted by bundle id for deterministic output.
         """
         needle = query.strip().lower()
-        seen: dict[str, ResolvedBundle] = {}
+        # Resolve each id to its highest-precedence entry FIRST, then filter by
+        # the query. Claiming an id only when it matches would let a lower-
+        # precedence entry with the same id surface when the highest-precedence
+        # one doesn't match the query — but that shadowed entry is not what
+        # `resolve()`/install would use, so search would advertise a bundle
+        # (name, version, author) the user can never actually get.
+        resolved: dict[str, ResolvedBundle] = {}
         for source in self._sources:
             for bundle_id, entry in self._entries_for(source).items():
-                if bundle_id in seen:
+                if bundle_id in resolved:
                     continue
-                if needle and not _matches(entry, needle):
+                resolved[bundle_id] = ResolvedBundle(
-                    continue
-                seen[bundle_id] = ResolvedBundle(
                     entry=entry.with_provenance(source), source=source
                 )
-        return [seen[k] for k in sorted(seen)]
+        return [
+            resolved[k]
+            for k in sorted(resolved)
+            if not needle or _matches(resolved[k].entry, needle)
+        ]
 
 
 def _matches(entry: CatalogEntry, needle: str) -> bool:

src/specify_cli/extensions/__init__.py

@@ -1075,9 +1075,11 @@ class ExtensionManager:
                         pass  # best-effort cleanup
                 continue
             frontmatter, body = registrar.parse_frontmatter(content)
-            frontmatter = registrar._adjust_script_paths(frontmatter)
+            frontmatter = registrar._adjust_script_paths(
+                frontmatter, extension_id=manifest.id
+            )
             body = registrar.resolve_skill_placeholders(
-                selected_ai, frontmatter, body, self.project_root
+                selected_ai, frontmatter, body, self.project_root, extension_id=manifest.id
             )
 
             original_desc = frontmatter.get("description", "")
@@ -1958,6 +1960,7 @@ class CommandRegistrar:
             project_root,
             context_note=context_note,
             link_outputs=link_outputs,
+            extension_id=manifest.id,
         )
 
     def register_commands_for_all_agents(
@@ -1978,6 +1981,7 @@ class CommandRegistrar:
             context_note=context_note,
             link_outputs=link_outputs,
             create_missing_active_skills_dir=create_missing_active_skills_dir,
+            extension_id=manifest.id,
         )
 
     def unregister_commands(
@@ -2688,7 +2692,12 @@ class ConfigManager:
             return {}
 
         try:
-            return yaml.safe_load(file_path.read_text(encoding="utf-8")) or {}
+            data = yaml.safe_load(file_path.read_text(encoding="utf-8"))
+            # Coerce a non-mapping root (list/scalar, or None for an empty
+            # file) to {} so callers that iterate/merge the result — e.g.
+            # _merge_configs' .items() — never crash. Mirrors the same
+            # non-dict-root guard in get_project_config().
+            return data if isinstance(data, dict) else {}
         except (yaml.YAMLError, OSError, UnicodeError):
             return {}
 

src/specify_cli/integrations/base.py

@@ -1178,12 +1178,18 @@ class YamlIntegration(IntegrationBase):
             default_flow_style=False,
         ).strip()
 
-        # Indent the body for YAML block scalar
+        # Indent the body for YAML block scalar. Use an explicit indentation
+        # indicator ("|2") rather than a bare "|": YAML infers a plain block
+        # scalar's indentation from its first non-empty line, so a body whose
+        # first line is itself indented (e.g. a markdown code block or a nested
+        # list item) would make the parser expect that deeper indent for the
+        # whole block and reject the later, less-indented lines. Pinning the
+        # indent to 2 keeps the recipe parseable whatever the body looks like.
         indented = "\n".join(f"  {line}" for line in body.split("\n"))
 
         lines = [
             header_yaml,
-            "prompt: |",
+            "prompt: |2",
             indented,
             "",
             f"# Source: {source_id}",

src/specify_cli/integrations/cursor_agent/__init__.py

@@ -75,7 +75,15 @@ class CursorAgentIntegration(SkillsIntegration):
         either drops tool calls or exits non-zero on the first approval
         prompt.
         """
-        args = [self.key, "-p", "--trust", "--approve-mcps", "--force", prompt]
+        args = [
+            self._resolve_executable(),
+            "-p",
+            "--trust",
+            "--approve-mcps",
+            "--force",
+            prompt,
+        ]
+        self._apply_extra_args_env_var(args)
         if model:
             args.extend(["--model", model])
         if output_json:

src/specify_cli/integrations/hermes/__init__.py

@@ -253,6 +253,11 @@ class HermesIntegration(SkillsIntegration):
         """
         args = [self._resolve_executable(), "chat", "-Q"]
 
+        # Operator-supplied SPECKIT_INTEGRATION_HERMES_EXTRA_ARGS go here —
+        # after the base command but before Spec Kit's canonical -m/--json/-s/-q
+        # flags — so they can't displace or clobber them (mirrors opencode).
+        self._apply_extra_args_env_var(args)
+
         if model:
             args.extend(["-m", model])
         if output_json:

src/specify_cli/workflows/expressions.py

@@ -183,6 +183,65 @@ def _is_single_expression(stripped: str) -> bool:
     return True
 
 
+def _interpolate_expressions(template: str, namespace: dict[str, Any]) -> str:
+    """Substitute every top-level ``{{ ... }}`` block in *template*, quote-aware.
+
+    Walks the template and, for each block, finds the closing ``}}`` that lies
+    outside string literals -- the same quote-scanning used by
+    ``_is_single_expression``. This keeps a literal ``}}`` inside a string
+    argument (e.g. ``| default('}}')``) from prematurely closing a block.
+
+    ``_EXPR_PATTERN.sub`` cannot do this: its non-greedy body stops at the first
+    ``}}`` regardless of quoting, so in a multi-expression template any block
+    whose argument contains a literal ``}}`` is captured truncated and mis-parsed
+    (raising ``ValueError`` from the filter parser). #3208/#3228 fixed exactly
+    this for the single-expression fast path but left the interpolation path on
+    the old regex.
+    """
+    out: list[str] = []
+    i = 0
+    n = len(template)
+    while i < n:
+        start = template.find("{{", i)
+        if start == -1:
+            out.append(template[i:])
+            break
+        out.append(template[i:start])
+        # Scan for the block-closing ``}}`` that is outside any string literal.
+        j = start + 2
+        quote: str | None = None
+        close = -1
+        while j < n:
+            ch = template[j]
+            if quote is not None:
+                if ch == quote:
+                    quote = None
+            elif ch in ("'", '"'):
+                quote = ch
+            elif ch == "}" and j + 1 < n and template[j + 1] == "}":
+                close = j
+                break
+            j += 1
+        if close == -1:
+            # No quote-aware close. Two sub-cases, both kept identical to the old
+            # regex so a malformed template is never silently hidden:
+            #   * a raw ``}}`` still exists in the tail (e.g. an unbalanced quote
+            #     in a filter arg swallowed the real delimiter) -- fall back to
+            #     that first raw ``}}`` and evaluate, letting the parser surface
+            #     a ValueError just as ``_EXPR_PATTERN.sub`` would have.
+            #   * no ``}}`` at all -- a genuinely unterminated ``{{``; leave the
+            #     tail verbatim, again matching the regex (which cannot match).
+            raw_close = template.find("}}", start + 2)
+            if raw_close == -1:
+                out.append(template[start:])
+                break
+            close = raw_close
+        val = _evaluate_simple_expression(template[start + 2:close].strip(), namespace)
+        out.append(str(val) if val is not None else "")
+        i = close + 2
+    return "".join(out)
+
+
 def _split_top_level_commas(text: str) -> list[str]:
     """Split *text* on commas that are not inside quotes or nested brackets.
 
@@ -408,15 +467,34 @@ def _evaluate_simple_expression(expr: str, namespace: dict[str, Any]) -> Any:
     return _resolve_dot_path(namespace, expr)
 
 
+def _coerce_number(value: Any) -> Any:
+    """Return *value* as int/float if it is a numeric string, else unchanged."""
+    if isinstance(value, str):
+        try:
+            return float(value) if "." in value else int(value)
+        except ValueError:
+            return value
+    return value
+
+
 def _safe_compare(left: Any, right: Any, op: str) -> bool:
-    """Safely compare two values, coercing types when possible."""
+    """Compare two values for ordering, coercing numeric strings when possible.
-    try:
+
-        if isinstance(left, str):
+    Numeric coercion is applied only when *both* operands look numeric, so a
-            left = float(left) if "." in left else int(left)
+    pair like ``"10"`` and ``"9"`` compares as numbers (10 > 9). When either
-        if isinstance(right, str):
+    side is a non-numeric string, both fall back to their original values and
-            right = float(right) if "." in right else int(right)
+    are compared directly -- so ordinary strings (dates, semver-ish tags,
-    except (ValueError, TypeError):
+    names) compare lexicographically the way Python does, instead of every
-        return False
+    such comparison silently returning ``False`` after a failed int()/float()
+    coercion. A genuinely incomparable pair (e.g. number vs non-numeric string)
+    raises ``TypeError`` and yields ``False``.
+    """
+    cl, cr = _coerce_number(left), _coerce_number(right)
+    # Only use the coerced numbers when both converted; otherwise a numeric
+    # string paired with a plain string would become an int-vs-str mismatch
+    # (always False) rather than a lexicographic string comparison.
+    if isinstance(cl, (int, float)) and isinstance(cr, (int, float)):
+        left, right = cl, cr
     try:
         if op == ">":
             return left > right  # type: ignore[operator]
@@ -472,12 +550,11 @@ def evaluate_expression(template: str, context: Any) -> Any:
     if _is_single_expression(stripped):
         return _evaluate_simple_expression(stripped[2:-2].strip(), namespace)
 
-    # Multi-expression: string interpolation
+    # Multi-expression: interpolate each block inline. Uses a quote-aware scan
-    def _replacer(m: re.Match[str]) -> str:
+    # (not ``_EXPR_PATTERN.sub``) so a literal ``}}`` inside a string argument
-        val = _evaluate_simple_expression(m.group(1).strip(), namespace)
+    # in any block does not close that block early -- matching the handling the
-        return str(val) if val is not None else ""
+    # single-expression path above already got in #3208/#3228.
-
+    return _interpolate_expressions(template, namespace)
-    return _EXPR_PATTERN.sub(_replacer, template)
 
 
 def evaluate_condition(condition: str, context: Any) -> bool:

src/specify_cli/workflows/steps/gate/__init__.py

@@ -73,7 +73,14 @@ class GateStep(StepBase):
         choice = self._prompt(self._compose_prompt(message, show_file), options)
         output["choice"] = choice
 
-        if choice in ("reject", "abort"):
+        # Match rejection case-insensitively. ``_prompt`` echoes the option's
+        # original casing, and ``validate`` accepts a reject option
+        # case-insensitively (``o.lower() in {"reject", "abort"}``), so a gate
+        # authored as ``options: [Approve, Reject]`` passes validation. Comparing
+        # ``choice`` case-sensitively here would then treat a ``Reject`` pick as
+        # approval and silently skip the abort — the reject path must agree with
+        # the check that let the option through.
+        if choice.lower() in ("reject", "abort"):
             if on_reject == "abort":
                 output["aborted"] = True
                 return StepResult(

tests/extensions/git/test_git_extension.py

@@ -122,10 +122,10 @@ def _run_bash(script_name: str, cwd: Path, *args: str, env_extra: dict | None =
     )
 
 
-def _run_pwsh(script_name: str, cwd: Path, *args: str) -> subprocess.CompletedProcess:
+def _run_pwsh(script_name: str, cwd: Path, *args: str, env_extra: dict | None = None) -> subprocess.CompletedProcess:
     """Run an extension PowerShell script."""
     script = cwd / ".specify" / "extensions" / "git" / "scripts" / "powershell" / script_name
-    env = {**os.environ, **_GIT_ENV}
+    env = {**os.environ, **_GIT_ENV, **(env_extra or {})}
     return subprocess.run(
         ["pwsh", "-NoProfile", "-File", str(script), *args],
         cwd=cwd,
@@ -320,6 +320,15 @@ class TestCreateFeatureBash:
         assert rt.returncode == 0, rt.stderr
         assert "HAS_GIT" not in rt.stdout
 
+    def test_help_documents_branch_prefix(self, tmp_path: Path):
+        """--help documents both template config knobs."""
+        project = _setup_project(tmp_path)
+        result = _run_bash("create-new-feature-branch.sh", project, "--help")
+
+        assert result.returncode == 0
+        assert "branch_template" in result.stdout
+        assert "branch_prefix" in result.stdout
+
     def test_branch_name_short_word_case_sensitivity(self, tmp_path: Path):
         """A short word is dropped from the derived branch name unless it appears
         as an acronym in UPPERCASE in the description (case-sensitive, must match the
@@ -363,6 +372,183 @@ class TestCreateFeatureBash:
         data = json.loads(result.stdout)
         assert data["FEATURE_NUM"] == "003"
 
+    def test_branch_template_adds_author_and_app_namespace(self, tmp_path: Path):
+        """branch_template namespaces generated branch names for monorepos."""
+        project = _setup_project(tmp_path / "app-a")
+        subprocess.run(["git", "config", "user.name", "jdoe"], cwd=project, check=True)
+        _write_config(project, 'branch_template: "{author}/{app}/{number}-{slug}"\n')
+
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "--short-name", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/001-guided-tour"
+        assert data["FEATURE_NUM"] == "001"
+
+    def test_branch_prefix_shorthand_adds_namespace(self, tmp_path: Path):
+        """branch_prefix expands to a namespace before the default branch shape."""
+        project = _setup_project(tmp_path / "app-a")
+        _write_config(project, 'branch_prefix: "features/{app}"\n')
+
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "--short-name", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "features/app-a/001-guided-tour"
+        assert data["FEATURE_NUM"] == "001"
+
+    def test_branch_template_scopes_number_after_numeric_app_namespace(self, tmp_path: Path):
+        """Numeric-looking namespace segments must not be parsed as feature numbers."""
+        project = _setup_project(tmp_path / "2026-app")
+        subprocess.run(["git", "config", "user.name", "jdoe"], cwd=project, check=True)
+        _write_config(project, 'branch_template: "{author}/{app}/{number}-{slug}"\n')
+        subprocess.run(["git", "branch", "jdoe/2026-app/007-existing"], cwd=project, check=True)
+
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "--dry-run", "--short-name", "next", "Next feature",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/2026-app/008-next"
+        assert data["FEATURE_NUM"] == "008"
+
+    def test_branch_template_ignores_malformed_timestamp_branches_when_numbering(self, tmp_path: Path):
+        """Malformed timestamp-looking branches must not inflate sequential numbering."""
+        project = _setup_project(tmp_path / "app-a")
+        subprocess.run(["git", "config", "user.name", "jdoe"], cwd=project, check=True)
+        _write_config(project, 'branch_template: "{author}/{app}/{number}-{slug}"\n')
+        subprocess.run(["git", "branch", "jdoe/app-a/007-existing"], cwd=project, check=True)
+        subprocess.run(["git", "branch", "jdoe/app-a/2026031-143022-invalid"], cwd=project, check=True)
+        subprocess.run(["git", "branch", "jdoe/app-a/20260319-143022"], cwd=project, check=True)
+
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "--dry-run", "--short-name", "next", "Next feature",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/008-next"
+        assert data["FEATURE_NUM"] == "008"
+
+    def test_branch_template_scopes_existing_branch_numbers(self, tmp_path: Path):
+        """Templated branch numbering ignores branches outside the current namespace."""
+        project = _setup_project(tmp_path / "app-a")
+        subprocess.run(["git", "config", "user.name", "jdoe"], cwd=project, check=True)
+        _write_config(project, 'branch_template: "{author}/{app}/{number}-{slug}"\n')
+        subprocess.run(["git", "branch", "jdoe/app-a/007-existing"], cwd=project, check=True)
+        subprocess.run(["git", "branch", "jdoe/app-b/010-other-app"], cwd=project, check=True)
+
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "--dry-run", "--short-name", "next", "Next feature",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/008-next"
+        assert data["FEATURE_NUM"] == "008"
+
+    def test_branch_template_requires_number_token(self, tmp_path: Path):
+        """Configured templates must include {number} so generated branches validate."""
+        project = _setup_project(tmp_path / "app-a")
+        _write_config(project, 'branch_template: "{author}/{app}/{slug}"\n')
+
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "--dry-run", "--short-name", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode != 0
+        assert "branch_template" in result.stderr
+        assert "{number}" in result.stderr
+
+    def test_branch_template_requires_feature_segment_to_start_with_number(self, tmp_path: Path):
+        """Templates must render a final path segment that validation accepts."""
+        project = _setup_project(tmp_path / "app-a")
+        _write_config(project, 'branch_template: "{author}/{app}/feature-{number}"\n')
+
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "--dry-run", "--short-name", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode != 0
+        assert "branch_template" in result.stderr
+        assert "{number}-" in result.stderr
+
+    def test_branch_template_rejects_slug_before_number(self, tmp_path: Path):
+        """{slug} before {number} would make branch-number scanning slug-specific."""
+        project = _setup_project(tmp_path / "app-a")
+        _write_config(project, 'branch_template: "{author}/{slug}/{number}-{slug}"\n')
+
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "--dry-run", "--short-name", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode != 0
+        assert "branch_template" in result.stderr
+        assert "{slug}" in result.stderr
+        assert "{number}" in result.stderr
+
+    def test_git_branch_name_override_extracts_number_after_namespace(self, tmp_path: Path):
+        """GIT_BRANCH_NAME extracts FEATURE_NUM from a namespaced branch."""
+        project = _setup_project(tmp_path / "app-a")
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "Ignored description",
+            env_extra={"GIT_BRANCH_NAME": "jdoe/app-a/042-custom-branch"},
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/042-custom-branch"
+        assert data["FEATURE_NUM"] == "042"
+
+    def test_git_branch_name_override_ignores_numeric_namespace_segments(self, tmp_path: Path):
+        """GIT_BRANCH_NAME uses the feature segment, not numeric namespace segments."""
+        project = _setup_project(tmp_path / "2026-app")
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "Ignored description",
+            env_extra={"GIT_BRANCH_NAME": "jdoe/2026-app/042-custom-branch"},
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/2026-app/042-custom-branch"
+        assert data["FEATURE_NUM"] == "042"
+
+    def test_git_branch_name_override_without_feature_marker_preserves_full_name(self, tmp_path: Path):
+        """GIT_BRANCH_NAME without a feature marker keeps the historical FEATURE_NUM."""
+        project = _setup_project(tmp_path / "app-a")
+        result = _run_bash(
+            "create-new-feature-branch.sh", project,
+            "--json", "Ignored description",
+            env_extra={"GIT_BRANCH_NAME": "jdoe/app-a/custom-branch"},
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/custom-branch"
+        assert data["FEATURE_NUM"] == "jdoe/app-a/custom-branch"
+
+    def test_truncation_warning_reports_utf8_bytes(self):
+        """Bash truncation warnings should use the same byte counter as enforcement."""
+        source = (EXT_BASH / "create-new-feature-branch.sh").read_text(encoding="utf-8")
+
+        assert '_byte_length "$ORIGINAL_BRANCH_NAME"' in source
+        assert '_byte_length "$BRANCH_NAME"' in source
+
     def test_dry_run_counts_branches_checked_out_in_worktrees(self, tmp_path: Path):
         """Branches checked out in sibling worktrees still reserve their prefix."""
         project = _setup_project(tmp_path / "project")
@@ -484,6 +670,15 @@ class TestCreateFeaturePowerShell:
         assert rt.returncode == 0, rt.stderr
         assert "HAS_GIT" not in rt.stdout
 
+    def test_help_documents_branch_prefix(self, tmp_path: Path):
+        """-Help documents both template config knobs."""
+        project = _setup_project(tmp_path)
+        result = _run_pwsh("create-new-feature-branch.ps1", project, "-Help")
+
+        assert result.returncode == 0
+        assert "branch_template" in result.stdout
+        assert "branch_prefix" in result.stdout
+
     def test_branch_name_short_word_case_sensitivity(self, tmp_path: Path):
         """PowerShell must match the bash twin: a short word is dropped unless it
         appears as an acronym in UPPERCASE (case-sensitive -cmatch, not -match)."""
@@ -525,6 +720,176 @@ class TestCreateFeaturePowerShell:
         data = json.loads(result.stdout)
         assert re.match(r"^\d{8}-\d{6}-feat$", data["BRANCH_NAME"])
 
+    def test_branch_template_adds_author_and_app_namespace(self, tmp_path: Path):
+        """PowerShell supports branch_template namespaces."""
+        project = _setup_project(tmp_path / "app-a")
+        subprocess.run(["git", "config", "user.name", "jdoe"], cwd=project, check=True)
+        _write_config(project, 'branch_template: "{author}/{app}/{number}-{slug}"\n')
+
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "-ShortName", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/001-guided-tour"
+        assert data["FEATURE_NUM"] == "001"
+
+    def test_branch_prefix_shorthand_adds_namespace(self, tmp_path: Path):
+        """PowerShell supports branch_prefix shorthand namespaces."""
+        project = _setup_project(tmp_path / "app-a")
+        _write_config(project, 'branch_prefix: "features/{app}"\n')
+
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "-ShortName", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "features/app-a/001-guided-tour"
+        assert data["FEATURE_NUM"] == "001"
+
+    def test_branch_template_scopes_number_after_numeric_app_namespace(self, tmp_path: Path):
+        """PowerShell ignores numeric-looking namespace segments when numbering."""
+        project = _setup_project(tmp_path / "2026-app")
+        subprocess.run(["git", "config", "user.name", "jdoe"], cwd=project, check=True)
+        _write_config(project, 'branch_template: "{author}/{app}/{number}-{slug}"\n')
+        subprocess.run(["git", "branch", "jdoe/2026-app/007-existing"], cwd=project, check=True)
+
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "-DryRun", "-ShortName", "next", "Next feature",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/2026-app/008-next"
+        assert data["FEATURE_NUM"] == "008"
+
+    def test_branch_template_ignores_malformed_timestamp_branches_when_numbering(self, tmp_path: Path):
+        """PowerShell skips malformed timestamp-looking refs during sequential numbering."""
+        project = _setup_project(tmp_path / "app-a")
+        subprocess.run(["git", "config", "user.name", "jdoe"], cwd=project, check=True)
+        _write_config(project, 'branch_template: "{author}/{app}/{number}-{slug}"\n')
+        subprocess.run(["git", "branch", "jdoe/app-a/007-existing"], cwd=project, check=True)
+        subprocess.run(["git", "branch", "jdoe/app-a/2026031-143022-invalid"], cwd=project, check=True)
+        subprocess.run(["git", "branch", "jdoe/app-a/20260319-143022"], cwd=project, check=True)
+
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "-DryRun", "-ShortName", "next", "Next feature",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/008-next"
+        assert data["FEATURE_NUM"] == "008"
+
+    def test_branch_template_scopes_existing_branch_numbers(self, tmp_path: Path):
+        """PowerShell templated numbering ignores branches outside the namespace."""
+        project = _setup_project(tmp_path / "app-a")
+        subprocess.run(["git", "config", "user.name", "jdoe"], cwd=project, check=True)
+        _write_config(project, 'branch_template: "{author}/{app}/{number}-{slug}"\n')
+        subprocess.run(["git", "branch", "jdoe/app-a/007-existing"], cwd=project, check=True)
+        subprocess.run(["git", "branch", "jdoe/app-b/010-other-app"], cwd=project, check=True)
+
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "-DryRun", "-ShortName", "next", "Next feature",
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/008-next"
+        assert data["FEATURE_NUM"] == "008"
+
+    def test_branch_template_requires_number_token(self, tmp_path: Path):
+        """PowerShell rejects templates without {number}."""
+        project = _setup_project(tmp_path / "app-a")
+        _write_config(project, 'branch_template: "{author}/{app}/{slug}"\n')
+
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "-DryRun", "-ShortName", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode != 0
+        assert "branch_template" in result.stderr
+        assert "{number}" in result.stderr
+
+    def test_branch_template_requires_feature_segment_to_start_with_number(self, tmp_path: Path):
+        """PowerShell rejects templates whose final segment cannot validate."""
+        project = _setup_project(tmp_path / "app-a")
+        _write_config(project, 'branch_template: "{author}/{app}/feature-{number}"\n')
+
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "-DryRun", "-ShortName", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode != 0
+        assert "branch_template" in result.stderr
+        assert "{number}-" in result.stderr
+
+    def test_branch_template_rejects_slug_before_number(self, tmp_path: Path):
+        """PowerShell rejects templates where {slug} scopes number scanning."""
+        project = _setup_project(tmp_path / "app-a")
+        _write_config(project, 'branch_template: "{author}/{slug}/{number}-{slug}"\n')
+
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "-DryRun", "-ShortName", "guided-tour", "Add guided tour",
+        )
+
+        assert result.returncode != 0
+        assert "branch_template" in result.stderr
+        assert "{slug}" in result.stderr
+        assert "{number}" in result.stderr
+
+    def test_git_branch_name_override_extracts_number_after_namespace(self, tmp_path: Path):
+        """PowerShell GIT_BRANCH_NAME extracts FEATURE_NUM from a namespaced branch."""
+        project = _setup_project(tmp_path / "app-a")
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "Ignored description",
+            env_extra={"GIT_BRANCH_NAME": "jdoe/app-a/042-custom-branch"},
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/042-custom-branch"
+        assert data["FEATURE_NUM"] == "042"
+
+    def test_git_branch_name_override_ignores_numeric_namespace_segments(self, tmp_path: Path):
+        """PowerShell GIT_BRANCH_NAME ignores numeric namespace segments."""
+        project = _setup_project(tmp_path / "2026-app")
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "Ignored description",
+            env_extra={"GIT_BRANCH_NAME": "jdoe/2026-app/042-custom-branch"},
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/2026-app/042-custom-branch"
+        assert data["FEATURE_NUM"] == "042"
+
+    def test_git_branch_name_override_without_feature_marker_preserves_full_name(self, tmp_path: Path):
+        """PowerShell keeps the full override name when no feature marker exists."""
+        project = _setup_project(tmp_path / "app-a")
+        result = _run_pwsh(
+            "create-new-feature-branch.ps1", project,
+            "-Json", "Ignored description",
+            env_extra={"GIT_BRANCH_NAME": "jdoe/app-a/custom-branch"},
+        )
+
+        assert result.returncode == 0, result.stderr
+        data = json.loads(result.stdout)
+        assert data["BRANCH_NAME"] == "jdoe/app-a/custom-branch"
+        assert data["FEATURE_NUM"] == "jdoe/app-a/custom-branch"
+
     def test_no_git_graceful_degradation(self, tmp_path: Path):
         """create-new-feature-branch.ps1 works without git."""
         project = _setup_project(tmp_path, git=False)
@@ -1011,13 +1376,31 @@ class TestGitCommonBash:
         )
         assert result.returncode == 0
 
-    def test_check_feature_branch_rejects_nested_prefix(self, tmp_path: Path):
+    def test_check_feature_branch_accepts_nested_prefix(self, tmp_path: Path):
         project = _setup_project(tmp_path)
         script = project / ".specify" / "extensions" / "git" / "scripts" / "bash" / "git-common.sh"
         result = subprocess.run(
             ["bash", "-c", f'source "{script}" && check_feature_branch "feat/fix/001-x" "true"'],
             capture_output=True, text=True,
         )
+        assert result.returncode == 0
+
+    def test_check_feature_branch_rejects_nested_prefix_without_number(self, tmp_path: Path):
+        project = _setup_project(tmp_path)
+        script = project / ".specify" / "extensions" / "git" / "scripts" / "bash" / "git-common.sh"
+        result = subprocess.run(
+            ["bash", "-c", f'source "{script}" && check_feature_branch "feat/fix/no-number" "true"'],
+            capture_output=True, text=True,
+        )
+        assert result.returncode != 0
+
+    def test_check_feature_branch_rejects_numeric_namespace_without_feature_number(self, tmp_path: Path):
+        project = _setup_project(tmp_path)
+        script = project / ".specify" / "extensions" / "git" / "scripts" / "bash" / "git-common.sh"
+        result = subprocess.run(
+            ["bash", "-c", f'source "{script}" && check_feature_branch "jdoe/2026-app/no-number" "true"'],
+            capture_output=True, text=True,
+        )
         assert result.returncode != 0
 
 
@@ -1037,3 +1420,33 @@ class TestGitCommonPowerShell:
             text=True,
         )
         assert result.returncode == 0
+
+    def test_test_feature_branch_accepts_nested_prefix(self, tmp_path: Path):
+        project = _setup_project(tmp_path)
+        script = project / ".specify" / "extensions" / "git" / "scripts" / "powershell" / "git-common.ps1"
+        result = subprocess.run(
+            [
+                "pwsh",
+                "-NoProfile",
+                "-Command",
+                f'. "{script}"; if (Test-FeatureBranch -Branch "jdoe/app-a/001-x" -HasGit $true) {{ exit 0 }} else {{ exit 1 }}',
+            ],
+            capture_output=True,
+            text=True,
+        )
+        assert result.returncode == 0
+
+    def test_test_feature_branch_rejects_numeric_namespace_without_feature_number(self, tmp_path: Path):
+        project = _setup_project(tmp_path)
+        script = project / ".specify" / "extensions" / "git" / "scripts" / "powershell" / "git-common.ps1"
+        result = subprocess.run(
+            [
+                "pwsh",
+                "-NoProfile",
+                "-Command",
+                f'. "{script}"; if (Test-FeatureBranch -Branch "jdoe/2026-app/no-number" -HasGit $true) {{ exit 0 }} else {{ exit 1 }}',
+            ],
+            capture_output=True,
+            text=True,
+        )
+        assert result.returncode != 0

tests/integration/test_bundler_catalog_stack.py

@@ -71,6 +71,47 @@ def test_search_dedupes_by_precedence_and_filters():
     assert [r.entry.id for r in qa_only] == ["beta"]
 
 
+def test_search_does_not_surface_a_shadowed_lower_precedence_entry():
+    """Search must resolve each id at its highest-precedence source, then
+    filter — never fall through to a shadowed lower-precedence entry the query
+    happens to match.
+
+    If the query matched only the lower-precedence copy of an id, search used
+    to return that copy, even though `resolve()`/install always use the
+    higher-precedence one. That advertised a bundle (name/version/source) the
+    user could never actually get.
+    """
+    sources = [_source("high", 1, "install-allowed"), _source("low", 2, "install-allowed")]
+    payloads = {
+        # Highest-precedence entry for 'shared' does NOT match "widget".
+        "high": catalog_payload({
+            "shared": catalog_entry_dict(
+                "shared", name="Alpha Tool", role="developer",
+                description="nothing relevant", version="2.0.0",
+            ),
+        }),
+        # Lower-precedence entry for the same id DOES match "widget".
+        "low": catalog_payload({
+            "shared": catalog_entry_dict(
+                "shared", name="Searchable Widget", version="1.0.0",
+            ),
+        }),
+    }
+    stack = _stack(sources, payloads)
+
+    # resolve() uses the high-precedence entry.
+    assert stack.resolve("shared").source.id == "high"
+
+    # A query that only the shadowed low-precedence entry matches returns
+    # nothing — search agrees with resolve().
+    assert stack.search("widget") == []
+
+    # And a query the high-precedence entry matches returns it (from 'high').
+    alpha = stack.search("alpha tool")
+    assert [r.entry.id for r in alpha] == ["shared"]
+    assert alpha[0].source.id == "high"
+
+
 def test_unreachable_source_raises_named_error():
     def fetcher(src):
         raise RuntimeError("boom")

tests/integrations/conftest.py

@@ -1,8 +1,24 @@
 """Shared test helpers for integration tests."""
 
+import pytest
+
 from specify_cli.integrations.base import MarkdownIntegration
 
 
+@pytest.fixture(autouse=True)
+def _isolate_integration_home(monkeypatch: pytest.MonkeyPatch, tmp_path):
+    """Keep integration tests from reading or writing the real user home."""
+    home = tmp_path / "home"
+    for path in (home, home / ".cache", home / ".config", home / ".local" / "share"):
+        path.mkdir(parents=True, exist_ok=True)
+
+    monkeypatch.setenv("HOME", str(home))
+    monkeypatch.setenv("USERPROFILE", str(home))
+    monkeypatch.setenv("XDG_CACHE_HOME", str(home / ".cache"))
+    monkeypatch.setenv("XDG_CONFIG_HOME", str(home / ".config"))
+    monkeypatch.setenv("XDG_DATA_HOME", str(home / ".local" / "share"))
+
+
 class StubIntegration(MarkdownIntegration):
     """Minimal concrete integration for testing."""
 

tests/integrations/test_home_isolation.py

@@ -0,0 +1,21 @@
+"""Regression tests for integration-test environment isolation."""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+
+def test_integration_tests_use_tmp_home(tmp_path: Path) -> None:
+    home = tmp_path / "home"
+
+    assert Path(os.environ["HOME"]) == home
+    assert Path(os.environ["USERPROFILE"]) == home
+    assert Path(os.environ["XDG_CACHE_HOME"]) == home / ".cache"
+    assert Path(os.environ["XDG_CONFIG_HOME"]) == home / ".config"
+    assert Path(os.environ["XDG_DATA_HOME"]) == home / ".local" / "share"
+
+    assert home.is_dir()
+    assert (home / ".cache").is_dir()
+    assert (home / ".config").is_dir()
+    assert (home / ".local" / "share").is_dir()

tests/integrations/test_integration_base_yaml.py

@@ -184,6 +184,23 @@ class YamlIntegrationTests:
         assert "scripts:" not in parsed["prompt"]
         assert "---" not in parsed["prompt"]
 
+    def test_yaml_prompt_with_indented_first_line_stays_valid(self):
+        """A body whose first line is indented must still parse.
+
+        A bare ``|`` block scalar infers its indentation from the first
+        non-empty line, so a body starting with an indented line (e.g. a
+        markdown code block or nested list item) made the parser expect that
+        deeper indent for the whole block and reject the later, shallower
+        lines. The explicit ``|2`` indicator pins the indent so it parses."""
+        body = "    indented first line\nback to normal\n    indented again"
+        rendered = YamlIntegration._render_yaml("Title", "Desc", body, "src")
+
+        yaml_lines = [
+            ln for ln in rendered.split("\n") if not ln.startswith("# Source:")
+        ]
+        parsed = yaml.safe_load("\n".join(yaml_lines))
+        assert parsed["prompt"].rstrip("\n") == body
+
     def test_plan_command_has_no_context_placeholder(self, tmp_path):
         """The generated plan command must not carry a context-file placeholder.
 

tests/integrations/test_integration_cursor_agent.py

@@ -125,6 +125,55 @@ class TestCursorAgentCliDispatch:
         assert argv is not None
         assert argv[0] == "cursor-agent"
 
+    def test_build_exec_args_honors_executable_override(self, monkeypatch):
+        """``SPECKIT_INTEGRATION_CURSOR_AGENT_EXECUTABLE`` overrides argv[0].
+
+        Every other CLI-dispatch integration (codex, devin, ...) routes
+        argv[0] through ``_resolve_executable()`` so operators can pin a
+        binary path (issue #2596). cursor-agent hardcoded ``self.key`` and
+        silently ignored the documented override.
+        """
+        monkeypatch.setenv(
+            "SPECKIT_INTEGRATION_CURSOR_AGENT_EXECUTABLE", "/custom/cursor"
+        )
+        i = get_integration("cursor-agent")
+        args = i.build_exec_args("/speckit-plan", output_json=False)
+        assert args[0] == "/custom/cursor"
+        # The mandatory headless flags must still be present.
+        for flag in ("-p", "--trust", "--approve-mcps", "--force"):
+            assert flag in args
+
+    def test_build_exec_args_honors_extra_args_override(self, monkeypatch):
+        """``SPECKIT_INTEGRATION_CURSOR_AGENT_EXTRA_ARGS`` flags are injected
+        *before* Spec Kit's canonical ``--model`` / ``--output-format`` flags.
+
+        The ``_apply_extra_args_env_var()`` hook (issue #2595) was never
+        invoked by cursor-agent, so operator-supplied flags were dropped.
+        Insertion order is the real contract: extra args must land after the
+        mandatory headless flags but before ``--model`` / ``--output-format``,
+        so they cannot clobber, displace, or reorder Spec Kit's canonical
+        trailing flags. Exercise with both a model and JSON output so both
+        canonical flags are present to pin against.
+        """
+        monkeypatch.setenv(
+            "SPECKIT_INTEGRATION_CURSOR_AGENT_EXTRA_ARGS", "--foo bar"
+        )
+        i = get_integration("cursor-agent")
+        args = i.build_exec_args(
+            "/speckit-plan", model="sonnet-4-thinking", output_json=True
+        )
+        assert "--foo" in args
+        assert "bar" in args
+        # "bar" is the value of "--foo": the tokens stay adjacent and in order.
+        assert args.index("bar") == args.index("--foo") + 1
+        # Extra args are inserted before the canonical flags, so they cannot
+        # clobber or reorder them (the behavioral contract this test guards).
+        assert args.index("--foo") < args.index("--model")
+        assert args.index("--foo") < args.index("--output-format")
+        # The canonical flags themselves remain intact and correctly paired.
+        assert args[args.index("--model") + 1] == "sonnet-4-thinking"
+        assert args[args.index("--output-format") + 1] == "json"
+
     def test_build_command_invocation_uses_hyphenated_skill_name(self):
         """SkillsIntegration: /speckit-plan (not /speckit.plan)."""
         i = get_integration("cursor-agent")

tests/integrations/test_integration_hermes.py

@@ -353,3 +353,38 @@ class TestHermesInitFlow:
             if "agent-context" not in d.name
         ]
         assert local_skills == [], f"Local skills dir should be empty, got: {local_skills}"
+
+
+class TestHermesBuildExecArgs:
+    """CLI dispatch argv, including the operator extra-args env hook."""
+
+    def test_build_exec_args_default_shape(self):
+        i = get_integration("hermes")
+        assert i.build_exec_args("/speckit-plan hi", output_json=True) == [
+            "hermes", "chat", "-Q", "--json", "-s", "speckit-plan", "-q", "hi",
+        ]
+
+    def test_build_exec_args_honors_extra_args(self, monkeypatch):
+        """SPECKIT_INTEGRATION_HERMES_EXTRA_ARGS is injected before the
+        canonical -m/--json/-s/-q flags (same env hook as codex/opencode/
+        devin; hermes previously skipped _apply_extra_args_env_var entirely).
+        """
+        monkeypatch.setenv(
+            "SPECKIT_INTEGRATION_HERMES_EXTRA_ARGS", "--temperature 0.2"
+        )
+        i = get_integration("hermes")
+        args = i.build_exec_args("/speckit-plan hi", output_json=True)
+        assert args == [
+            "hermes", "chat", "-Q", "--temperature", "0.2",
+            "--json", "-s", "speckit-plan", "-q", "hi",
+        ]
+        # Injected before the canonical flags so it can't displace them.
+        assert args.index("--temperature") < args.index("--json")
+        assert args.index("--temperature") < args.index("-s")
+
+    def test_build_exec_args_honors_executable_override(self, monkeypatch):
+        monkeypatch.setenv(
+            "SPECKIT_INTEGRATION_HERMES_EXECUTABLE", "/custom/hermes"
+        )
+        i = get_integration("hermes")
+        assert i.build_exec_args("/speckit-plan hi")[0] == "/custom/hermes"

tests/integrations/test_registry.py

@@ -48,6 +48,19 @@ def _multi_install_safe_pairs() -> list[tuple[str, str]]:
     ]
 
 
+def _multi_install_safe_orders() -> list[list[str]]:
+    safe_keys = _multi_install_safe_keys()
+    if len(safe_keys) < 2:
+        return [safe_keys]
+    return [safe_keys[index:] + safe_keys[:index] for index in range(len(safe_keys))]
+
+
+def _multi_install_safe_order_id(ordered_keys: list[str]) -> str:
+    if not ordered_keys:
+        return "no-safe-integrations"
+    return f"init-{ordered_keys[0]}"
+
+
 def _posix_path(value: str | None) -> str | None:
     if not value:
         return None
@@ -87,16 +100,6 @@ def _paths_overlap(first: str | None, second: str | None) -> bool:
         return False
 
 
-def _path_is_inside(path: str | None, directory: str | None) -> bool:
-    if not path or not directory:
-        return False
-    try:
-        PurePosixPath(path).relative_to(PurePosixPath(directory))
-        return True
-    except ValueError:
-        return False
-
-
 class TestRegistry:
     def test_registry_is_dict(self):
         assert isinstance(INTEGRATION_REGISTRY, dict)
@@ -162,6 +165,15 @@ class TestRegistrarKeyAlignment:
 class TestMultiInstallSafeContracts:
     """Declared safe integrations must stay isolated from each other."""
 
+    def test_safe_install_orders_rotate_each_integration_through_init(self):
+        safe_keys = _multi_install_safe_keys()
+        orders = _multi_install_safe_orders()
+
+        assert len(safe_keys) >= 2
+        assert [order[0] for order in orders] == safe_keys
+        assert len({tuple(order) for order in orders}) == len(safe_keys)
+        assert all(sorted(order) == safe_keys for order in orders)
+
     @pytest.mark.parametrize("key", _multi_install_safe_keys())
     def test_safe_integrations_have_static_isolated_paths(self, key):
         assert _integration_root_dir(key), (
@@ -187,62 +199,77 @@ class TestMultiInstallSafeContracts:
             f"{_integration_commands_dir(second)!r}"
         )
 
-    @pytest.mark.parametrize(("first", "second"), _multi_install_safe_pairs())
+    @pytest.mark.parametrize(
+        "ordered_keys",
+        _multi_install_safe_orders(),
+        ids=_multi_install_safe_order_id,
+    )
     def test_safe_integrations_have_disjoint_manifests(
         self,
         tmp_path,
-        first,
+        ordered_keys,
-        second,
     ):
-        for initial, additional in ((first, second), (second, first)):
+        # The pairwise disjointness contract is only meaningful with at least
-            project_root = tmp_path / f"project-{initial}-{additional}"
+        # two safe integrations. Guard so a shrunken registry fails loudly here
-            project_root.mkdir()
+        # rather than passing vacuously (or tripping over ordered_keys[0] below).
-            runner = CliRunner()
+        assert len(ordered_keys) >= 2, (
+            f"expected at least two multi-install-safe integrations, got {ordered_keys}"
+        )
 
-            original_cwd = os.getcwd()
+        project_root = tmp_path / "project"
-            try:
+        project_root.mkdir()
-                os.chdir(project_root)
+        runner = CliRunner()
-                init_result = runner.invoke(
-                    app,
-                    [
-                        "init",
-                        "--here",
-                        "--integration",
-                        initial,
-                        "--script",
-                        "sh",
-                        "--ignore-agent-tools",
-                    ],
-                    catch_exceptions=False,
-                )
-                assert init_result.exit_code == 0, init_result.output
 
+        # Install every safe integration once into a single project, then assert
+        # pairwise manifest isolation. Each safe integration writes only to its
+        # own (disjoint) directories and always records what it writes, so a
+        # manifest's contents are independent of install order and of which other
+        # integrations are co-installed. The parametrized rotations keep the
+        # aggregate setup while placing each safe integration first once, so each
+        # one still exercises the `specify init --integration ...` path.
+        original_cwd = os.getcwd()
+        try:
+            os.chdir(project_root)
+            init_result = runner.invoke(
+                app,
+                [
+                    "init",
+                    "--here",
+                    "--integration",
+                    ordered_keys[0],
+                    "--script",
+                    "sh",
+                    "--ignore-agent-tools",
+                ],
+                catch_exceptions=False,
+            )
+            assert init_result.exit_code == 0, init_result.output
+
+            for key in ordered_keys[1:]:
                 install_result = runner.invoke(
                     app,
-                    ["integration", "install", additional, "--script", "sh"],
+                    ["integration", "install", key, "--script", "sh"],
                     catch_exceptions=False,
                 )
                 assert install_result.exit_code == 0, install_result.output
-            finally:
+        finally:
-                os.chdir(original_cwd)
+            os.chdir(original_cwd)
 
-            initial_manifest = json.loads(
+        integrations_dir = project_root / ".specify" / "integrations"
-                (
+        manifests = {}
-                    project_root / ".specify" / "integrations" / f"{initial}.manifest.json"
+        for key in ordered_keys:
-                ).read_text(encoding="utf-8")
+            manifest = json.loads(
-            )
+                (integrations_dir / f"{key}.manifest.json").read_text(encoding="utf-8")
-            additional_manifest = json.loads(
-                (
-                    project_root / ".specify" / "integrations" / f"{additional}.manifest.json"
-                ).read_text(encoding="utf-8")
             )
+            files = manifest.get("files", {})
+            assert isinstance(files, dict), f"{key} manifest files must be an object"
+            manifests[key] = set(files.keys())
 
-            initial_files = set(initial_manifest.get("files", {}))
+        for first, second in _multi_install_safe_pairs():
-            additional_files = set(additional_manifest.get("files", {}))
+            overlap = manifests[first] & manifests[second]
-
+            assert not overlap, (
-            assert initial_files.isdisjoint(additional_files), (
+                f"{first} and {second} are declared multi-install safe but both manage "
-                f"{initial} and {additional} are declared multi-install safe but both manage "
+                f"these files: {sorted(overlap)}"
-                f"these files: {sorted(initial_files & additional_files)}"
             )
 
 

tests/test_check_prerequisites_python_parity.py

@@ -0,0 +1,339 @@
+"""Parity tests for the Python check-prerequisites PoC."""
+
+from __future__ import annotations
+
+import json
+import os
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+
+from tests.conftest import requires_bash
+
+PROJECT_ROOT = Path(__file__).resolve().parent.parent
+COMMON_SH = PROJECT_ROOT / "scripts" / "bash" / "common.sh"
+CHECK_PREREQS_SH = PROJECT_ROOT / "scripts" / "bash" / "check-prerequisites.sh"
+COMMON_PS = PROJECT_ROOT / "scripts" / "powershell" / "common.ps1"
+CHECK_PREREQS_PS = PROJECT_ROOT / "scripts" / "powershell" / "check-prerequisites.ps1"
+COMMON_PY = PROJECT_ROOT / "scripts" / "python" / "common.py"
+CHECK_PREREQS_PY = PROJECT_ROOT / "scripts" / "python" / "check_prerequisites.py"
+
+HAS_PWSH = shutil.which("pwsh") is not None
+_WINDOWS_POWERSHELL = (
+    shutil.which("powershell.exe") or shutil.which("powershell")
+) if os.name == "nt" else None
+
+
+def _install_scripts(repo: Path) -> None:
+    bash_dir = repo / ".specify" / "scripts" / "bash"
+    bash_dir.mkdir(parents=True, exist_ok=True)
+    shutil.copy(COMMON_SH, bash_dir / "common.sh")
+    shutil.copy(CHECK_PREREQS_SH, bash_dir / "check-prerequisites.sh")
+
+    ps_dir = repo / ".specify" / "scripts" / "powershell"
+    ps_dir.mkdir(parents=True, exist_ok=True)
+    shutil.copy(COMMON_PS, ps_dir / "common.ps1")
+    shutil.copy(CHECK_PREREQS_PS, ps_dir / "check-prerequisites.ps1")
+
+    py_dir = repo / ".specify" / "scripts" / "python"
+    py_dir.mkdir(parents=True, exist_ok=True)
+    shutil.copy(COMMON_PY, py_dir / "common.py")
+    shutil.copy(CHECK_PREREQS_PY, py_dir / "check_prerequisites.py")
+
+
+def _write_feature_json(
+    repo: Path, feature_directory: str = "specs/001-my-feature"
+) -> None:
+    (repo / ".specify" / "feature.json").write_text(
+        json.dumps({"feature_directory": feature_directory}, separators=(",", ":"))
+        + "\n",
+        encoding="utf-8",
+    )
+
+
+def _clean_env() -> dict[str, str]:
+    env = os.environ.copy()
+    for key in list(env):
+        if key.startswith("SPECIFY_"):
+            env.pop(key)
+    return env
+
+
+def _git_init(repo: Path) -> None:
+    subprocess.run(["git", "init", "-q"], cwd=repo, check=True)
+    subprocess.run(
+        ["git", "config", "user.email", "test@example.com"], cwd=repo, check=True
+    )
+    subprocess.run(["git", "config", "user.name", "Test User"], cwd=repo, check=True)
+    subprocess.run(
+        ["git", "commit", "--allow-empty", "-m", "init", "-q"], cwd=repo, check=True
+    )
+
+
+@pytest.fixture
+def prereq_repo(tmp_path: Path) -> Path:
+    repo = tmp_path / "proj"
+    repo.mkdir()
+    _git_init(repo)
+    (repo / ".specify").mkdir()
+    _install_scripts(repo)
+    return repo
+
+
+def _py_cmd(repo: Path, *args: str) -> list[str]:
+    script = repo / ".specify" / "scripts" / "python" / "check_prerequisites.py"
+    return [sys.executable, str(script), *args]
+
+
+def _repo_copy_py_cmd(repo: Path, *args: str) -> list[str]:
+    script = repo / "scripts" / "python" / "check_prerequisites.py"
+    return [sys.executable, str(script), *args]
+
+
+def _bash_cmd(repo: Path, *args: str) -> list[str]:
+    script = repo / ".specify" / "scripts" / "bash" / "check-prerequisites.sh"
+    return ["bash", str(script), *args]
+
+
+def _ps_cmd(repo: Path, *args: str) -> list[str]:
+    script = repo / ".specify" / "scripts" / "powershell" / "check-prerequisites.ps1"
+    exe = "pwsh" if HAS_PWSH else _WINDOWS_POWERSHELL
+    return [exe, "-NoProfile", "-File", str(script), *args]
+
+
+def _run(
+    cmd: list[str], repo: Path, env: dict[str, str] | None = None
+) -> subprocess.CompletedProcess[str]:
+    return subprocess.run(
+        cmd,
+        cwd=repo,
+        capture_output=True,
+        text=True,
+        check=False,
+        env=env or _clean_env(),
+    )
+
+
+def _json_stdout(result: subprocess.CompletedProcess[str]) -> object:
+    return json.loads(result.stdout)
+
+
+def _normalize_status_text(text: str) -> str:
+    return (
+        text.replace("  ✓ ", "  [OK] ")
+        .replace("  ✗ ", "  [FAIL] ")
+        .replace("\r\n", "\n")
+    )
+
+
+def _normalize_help_text(text: str) -> str:
+    normalized = text.replace("\r\n", "\n").replace(
+        "check-prerequisites.sh", "check_prerequisites.py"
+    )
+    return "\n".join("" if not line.strip() else line for line in normalized.split("\n"))
+
+
+@requires_bash
+@pytest.mark.parametrize(
+    "args",
+    [
+        ("--json",),
+        ("--json", "--include-tasks"),
+        ("--json", "--require-tasks", "--include-tasks"),
+        ("--json", "--paths-only"),
+    ],
+)
+def test_python_json_output_matches_bash(prereq_repo: Path, args: tuple[str, ...]) -> None:
+    feat = prereq_repo / "specs" / "001-my-feature"
+    feat.mkdir(parents=True)
+    (feat / "plan.md").write_text("# plan\n", encoding="utf-8")
+    (feat / "tasks.md").write_text("# tasks\n", encoding="utf-8")
+    (feat / "research.md").write_text("# research\n", encoding="utf-8")
+    (feat / "data-model.md").write_text("# model\n", encoding="utf-8")
+    (feat / "quickstart.md").write_text("# quickstart\n", encoding="utf-8")
+    (feat / "contracts" / "v1").mkdir(parents=True)
+    _write_feature_json(prereq_repo)
+
+    bash = _run(_bash_cmd(prereq_repo, *args), prereq_repo)
+    py = _run(_py_cmd(prereq_repo, *args), prereq_repo)
+
+    assert py.returncode == bash.returncode == 0
+    assert py.stderr == bash.stderr == ""
+    assert _json_stdout(py) == _json_stdout(bash)
+
+
+@requires_bash
+def test_python_text_output_matches_bash(prereq_repo: Path) -> None:
+    feat = prereq_repo / "specs" / "001-my-feature"
+    feat.mkdir(parents=True)
+    (feat / "plan.md").write_text("# plan\n", encoding="utf-8")
+    (feat / "contracts").mkdir()
+    _write_feature_json(prereq_repo)
+
+    bash = _run(_bash_cmd(prereq_repo, "--include-tasks"), prereq_repo)
+    py = _run(_py_cmd(prereq_repo, "--include-tasks"), prereq_repo)
+
+    assert py.returncode == bash.returncode == 0
+    assert py.stderr == bash.stderr == ""
+    assert _normalize_status_text(py.stdout) == _normalize_status_text(bash.stdout)
+
+
+@requires_bash
+def test_python_help_output_matches_bash(prereq_repo: Path) -> None:
+    bash = _run(_bash_cmd(prereq_repo, "--help"), prereq_repo)
+    py = _run(_py_cmd(prereq_repo, "--help"), prereq_repo)
+
+    assert py.returncode == bash.returncode == 0
+    assert py.stderr == bash.stderr == ""
+    assert _normalize_help_text(py.stdout) == _normalize_help_text(bash.stdout)
+
+
+@requires_bash
+def test_python_unknown_option_matches_bash_error_shape(prereq_repo: Path) -> None:
+    bash = _run(_bash_cmd(prereq_repo, "--bogus"), prereq_repo)
+    py = _run(_py_cmd(prereq_repo, "--bogus"), prereq_repo)
+
+    assert py.returncode == bash.returncode == 1
+    assert py.stdout == bash.stdout == ""
+    assert py.stderr == bash.stderr
+
+
+@pytest.mark.skipif(not (HAS_PWSH or _WINDOWS_POWERSHELL), reason="no PowerShell available")
+@pytest.mark.parametrize(
+    ("py_args", "ps_args"),
+    [
+        (("--json",), ("-Json",)),
+        (("--json", "--include-tasks"), ("-Json", "-IncludeTasks")),
+        (
+            ("--json", "--require-tasks", "--include-tasks"),
+            ("-Json", "-RequireTasks", "-IncludeTasks"),
+        ),
+        (("--json", "--paths-only"), ("-Json", "-PathsOnly")),
+    ],
+    ids=[
+        "json",
+        "json_include_tasks",
+        "json_require_tasks_include_tasks",
+        "json_paths_only",
+    ],
+)
+def test_python_json_output_matches_powershell(
+    prereq_repo: Path, py_args: tuple[str, ...], ps_args: tuple[str, ...]
+) -> None:
+    feat = prereq_repo / "specs" / "001-my-feature"
+    feat.mkdir(parents=True)
+    (feat / "plan.md").write_text("# plan\n", encoding="utf-8")
+    (feat / "tasks.md").write_text("# tasks\n", encoding="utf-8")
+    (feat / "research.md").write_text("# research\n", encoding="utf-8")
+    (feat / "data-model.md").write_text("# model\n", encoding="utf-8")
+    (feat / "quickstart.md").write_text("# quickstart\n", encoding="utf-8")
+    (feat / "contracts" / "v1").mkdir(parents=True)
+    _write_feature_json(prereq_repo)
+
+    ps = _run(_ps_cmd(prereq_repo, *ps_args), prereq_repo)
+    py = _run(_py_cmd(prereq_repo, *py_args), prereq_repo)
+
+    assert py.returncode == ps.returncode == 0
+    assert py.stderr == ps.stderr == ""
+    assert _json_stdout(py) == _json_stdout(ps)
+
+
+def test_python_repo_copy_script_file_fallback_finds_repo_root(tmp_path: Path) -> None:
+    repo = tmp_path / "proj"
+    outside = tmp_path / "outside"
+    repo.mkdir()
+    outside.mkdir()
+    _git_init(repo)
+    (repo / ".specify").mkdir()
+    _write_feature_json(repo)
+    (repo / "specs" / "001-my-feature").mkdir(parents=True)
+
+    py_dir = repo / "scripts" / "python"
+    py_dir.mkdir(parents=True)
+    shutil.copy(COMMON_PY, py_dir / "common.py")
+    shutil.copy(CHECK_PREREQS_PY, py_dir / "check_prerequisites.py")
+
+    py = _run(_repo_copy_py_cmd(repo, "--json", "--paths-only"), outside)
+
+    assert py.returncode == 0, py.stderr
+    assert Path(_json_stdout(py)["REPO_ROOT"]) == repo
+
+
+def test_python_paths_only_does_not_persist_feature_json(prereq_repo: Path) -> None:
+    (prereq_repo / "specs" / "001-my-feature").mkdir(parents=True)
+    (prereq_repo / "specs" / "002-other").mkdir(parents=True)
+    _write_feature_json(prereq_repo, "specs/001-my-feature")
+    feature_json = prereq_repo / ".specify" / "feature.json"
+    before = feature_json.read_text(encoding="utf-8")
+    env = _clean_env()
+    env["SPECIFY_FEATURE_DIRECTORY"] = "specs/002-other"
+
+    py = _run(_py_cmd(prereq_repo, "--json", "--paths-only"), prereq_repo, env=env)
+
+    assert py.returncode == 0, py.stderr
+    assert "002-other" in _json_stdout(py)["FEATURE_DIR"]
+    assert feature_json.read_text(encoding="utf-8") == before
+
+
+def test_python_normal_mode_persists_feature_json(prereq_repo: Path) -> None:
+    (prereq_repo / "specs" / "001-my-feature").mkdir(parents=True)
+    feat = prereq_repo / "specs" / "002-other"
+    feat.mkdir(parents=True)
+    (feat / "plan.md").write_text("# plan\n", encoding="utf-8")
+    _write_feature_json(prereq_repo, "specs/001-my-feature")
+    env = _clean_env()
+    env["SPECIFY_FEATURE_DIRECTORY"] = "specs/002-other"
+
+    py = _run(_py_cmd(prereq_repo, "--json"), prereq_repo, env=env)
+
+    assert py.returncode == 0, py.stderr
+    data = json.loads(
+        (prereq_repo / ".specify" / "feature.json").read_text(encoding="utf-8")
+    )
+    assert data["feature_directory"] == "specs/002-other"
+
+
+@pytest.mark.parametrize(
+    ("args", "expected"),
+    [
+        (("--json",), "Feature directory not found"),
+        (("--json",), "plan.md not found"),
+        (("--json", "--require-tasks"), "tasks.md not found"),
+    ],
+    ids=["missing_feature_context", "missing_plan", "missing_tasks"],
+)
+def test_python_negative_errors_are_stderr_only(
+    tmp_path: Path, args: tuple[str, ...], expected: str
+) -> None:
+    repo = tmp_path / "proj"
+    repo.mkdir()
+    _git_init(repo)
+    (repo / ".specify").mkdir()
+    _install_scripts(repo)
+
+    if expected in {"plan.md not found", "tasks.md not found"}:
+        feat = repo / "specs" / "001-my-feature"
+        feat.mkdir(parents=True)
+        _write_feature_json(repo)
+        if expected == "tasks.md not found":
+            (feat / "plan.md").write_text("# plan\n", encoding="utf-8")
+
+    py = _run(_py_cmd(repo, *args), repo)
+
+    assert py.returncode != 0
+    assert expected in py.stderr
+    assert expected not in py.stdout
+    assert py.stdout.strip() == ""
+
+
+def test_python_branch_falls_back_to_feature_dir_basename(prereq_repo: Path) -> None:
+    (prereq_repo / "specs" / "001-my-feature").mkdir(parents=True)
+    _write_feature_json(prereq_repo)
+
+    py = _run(_py_cmd(prereq_repo, "--json", "--paths-only"), prereq_repo)
+
+    assert py.returncode == 0, py.stderr
+    assert _json_stdout(py)["BRANCH"] == "001-my-feature"

tests/test_extension_skills.py

@@ -850,6 +850,67 @@ class TestExtensionSkillRegistration:
         assert ".specify/templates/checklist.md" in content
         assert ".specify/memory/constitution.md" in content
 
+    def test_skill_registration_uses_extension_local_script_paths(self, project_dir, temp_dir):
+        """Auto-registered skills should not rewrite extension scripts into core scripts."""
+        _create_init_options(project_dir, ai="claude", ai_skills=True)
+        skills_dir = _create_skills_dir(project_dir, ai="claude")
+
+        ext_dir = temp_dir / "scripted-ext"
+        ext_dir.mkdir()
+        manifest_data = {
+            "schema_version": "1.0",
+            "extension": {
+                "id": "scripted-ext",
+                "name": "Scripted Extension",
+                "version": "1.0.0",
+                "description": "Test",
+            },
+            "requires": {"speckit_version": ">=0.1.0"},
+            "provides": {
+                "commands": [
+                    {
+                        "name": "speckit.scripted-ext.check",
+                        "file": "commands/check.md",
+                        "description": "Scripted check command",
+                    }
+                ]
+            },
+        }
+        with open(ext_dir / "extension.yml", "w") as f:
+            yaml.safe_dump(manifest_data, f)
+
+        (ext_dir / "commands").mkdir()
+        (ext_dir / "scripts" / "bash").mkdir(parents=True)
+        (ext_dir / "scripts" / "bash" / "resolve-skill.sh").write_text(
+            "#!/usr/bin/env bash\n"
+        )
+        (ext_dir / "scripts" / "bash" / "ensure-skills.sh").write_text(
+            "#!/usr/bin/env bash\n"
+        )
+        (ext_dir / "commands" / "check.md").write_text(
+            "---\n"
+            "description: Scripted check command\n"
+            "scripts:\n"
+            '  sh: scripts/bash/resolve-skill.sh "{ARGS}"\n'
+            "---\n\n"
+            "Run {SCRIPT}\n"
+            "Then run scripts/bash/ensure-skills.sh.\n"
+        )
+
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(ext_dir, "0.1.0", register_commands=False)
+
+        content = (skills_dir / "speckit-scripted-ext-check" / "SKILL.md").read_text()
+        assert "{SCRIPT}" not in content
+        assert "{ARGS}" not in content
+        assert (
+            '.specify/extensions/scripted-ext/scripts/bash/resolve-skill.sh "$ARGUMENTS"'
+            in content
+        )
+        assert ".specify/extensions/scripted-ext/scripts/bash/ensure-skills.sh" in content
+        assert ".specify/scripts/bash/resolve-skill.sh" not in content
+        assert ".specify/scripts/bash/ensure-skills.sh" not in content
+
     def test_missing_command_file_skipped(self, skills_project, temp_dir):
         """Commands with missing source files should be skipped gracefully."""
         project_dir, skills_dir = skills_project

tests/test_extensions.py

@@ -31,6 +31,7 @@ from specify_cli.extensions import (
     ExtensionRegistry,
     ExtensionManager,
     CommandRegistrar,
+    ConfigManager,
     HookExecutor,
     ExtensionCatalog,
     ExtensionError,
@@ -1146,10 +1147,12 @@ class TestExtensionManager:
             context_note=None,
             link_outputs=False,
             create_missing_active_skills_dir=False,
+            extension_id=None,
         ):
             captured["create_missing_active_skills_dir"] = (
                 create_missing_active_skills_dir
             )
+            captured["extension_id"] = extension_id
             return {}
 
         monkeypatch.setattr(
@@ -1163,6 +1166,7 @@ class TestExtensionManager:
         registrar.register_commands_for_all_agents(manifest, extension_dir, project_dir)
 
         assert captured["create_missing_active_skills_dir"] is False
+        assert captured["extension_id"] == manifest.id
 
     def test_install_duplicate(self, extension_dir, project_dir):
         """Test installing already installed extension."""
@@ -1694,6 +1698,29 @@ $ARGUMENTS
         assert adjusted["scripts"]["sh"] == ".specify/extensions/test-ext/scripts/setup.sh {ARGS}"
         assert adjusted["scripts"]["ps"] == ".specify/scripts/powershell/setup-plan.ps1 {ARGS}"
 
+    def test_adjust_script_paths_rewrites_extension_top_level_scripts(self):
+        """Extension command-local scripts should resolve under the installed extension."""
+        from specify_cli.agents import CommandRegistrar as AgentCommandRegistrar
+
+        registrar = AgentCommandRegistrar()
+        original = {
+            "scripts": {
+                "sh": "scripts/bash/resolve-skill.sh {ARGS}",
+                "ps": "../../scripts/powershell/setup-plan.ps1 -Json",
+            }
+        }
+
+        adjusted = registrar._adjust_script_paths(original, extension_id="test-ext")
+
+        assert (
+            adjusted["scripts"]["sh"]
+            == ".specify/extensions/test-ext/scripts/bash/resolve-skill.sh {ARGS}"
+        )
+        assert (
+            adjusted["scripts"]["ps"]
+            == ".specify/scripts/powershell/setup-plan.ps1 -Json"
+        )
+
     def test_rewrite_project_relative_paths_preserves_extension_local_body_paths(self):
         """Body rewrites should preserve extension-local assets while fixing top-level refs."""
         from specify_cli.agents import CommandRegistrar as AgentCommandRegistrar
@@ -1708,6 +1735,24 @@ $ARGUMENTS
         assert ".specify/extensions/test-ext/templates/spec.md" in rewritten
         assert ".specify/scripts/bash/setup-plan.sh" in rewritten
 
+    def test_rewrite_project_relative_paths_uses_extension_context_for_scripts(self):
+        """Extension source bodies treat top-level scripts/ as extension-local."""
+        from specify_cli.agents import CommandRegistrar as AgentCommandRegistrar
+
+        body = (
+            "Run scripts/bash/ensure-skills.sh\n"
+            "Fallback ../../scripts/bash/setup-plan.sh\n"
+            "Read templates/checklist.md\n"
+        )
+
+        rewritten = AgentCommandRegistrar.rewrite_project_relative_paths(
+            body, extension_id="test-ext"
+        )
+
+        assert ".specify/extensions/test-ext/scripts/bash/ensure-skills.sh" in rewritten
+        assert ".specify/scripts/bash/setup-plan.sh" in rewritten
+        assert ".specify/templates/checklist.md" in rewritten
+
     def test_render_toml_command_handles_embedded_triple_double_quotes(self):
         """TOML renderer should stay valid when body includes triple double-quotes."""
         from specify_cli.agents import CommandRegistrar as AgentCommandRegistrar
@@ -7492,3 +7537,52 @@ def test_extension_wrapper_resolves_ghes_asset_when_host_configured(tmp_path, mo
     )
     assert resolved == "https://ghes.example/api/v3/repos/o/r/releases/assets/7"
     assert captured == ["https://ghes.example/api/v3/repos/o/r/releases/tags/v1"]
+
+
+class TestConfigManagerNonMappingYaml:
+    """A non-mapping YAML config root must not crash config/hook resolution."""
+
+    def _make(self, tmp_path, body: str):
+        ext_dir = tmp_path / ".specify" / "extensions" / "jira"
+        ext_dir.mkdir(parents=True)
+        (ext_dir / "jira-config.yml").write_text(body, encoding="utf-8")
+        return ConfigManager(tmp_path, "jira")
+
+    def test_get_config_coerces_list_root(self, tmp_path):
+        """A YAML list root previously raised AttributeError in _merge_configs."""
+        cm = self._make(tmp_path, "- foo\n- bar\n")
+        assert cm.get_config() == {}
+
+    def test_get_config_coerces_scalar_root(self, tmp_path):
+        cm = self._make(tmp_path, "just a string\n")
+        assert cm.get_config() == {}
+
+    def test_has_value_and_get_value_do_not_raise(self, tmp_path):
+        cm = self._make(tmp_path, "- foo\n")
+        assert cm.has_value("anything") is False
+        assert cm.get_value("anything") is None
+
+    def test_valid_local_config_layers_over_list_root_project_config(self, tmp_path):
+        """A malformed project config must not block a valid local config."""
+        ext_dir = tmp_path / ".specify" / "extensions" / "jira"
+        ext_dir.mkdir(parents=True)
+        (ext_dir / "jira-config.yml").write_text("- foo\n- bar\n", encoding="utf-8")
+        (ext_dir / "local-config.yml").write_text(
+            "notifications:\n  enabled: true\n", encoding="utf-8"
+        )
+        cm = ConfigManager(tmp_path, "jira")
+        assert cm.get_value("notifications.enabled") is True
+
+    def test_hook_condition_returns_false_without_raising(self, tmp_path):
+        """`config.x is set` on a scalar-root config must evaluate cleanly.
+
+        Before the fix, _merge_configs raised AttributeError and the
+        exception was swallowed by should_execute_hook, silently disabling
+        every config-based hook for the extension. Assert on
+        _evaluate_condition directly so the crash isn't masked.
+        """
+        ext_dir = tmp_path / ".specify" / "extensions" / "jira"
+        ext_dir.mkdir(parents=True)
+        (ext_dir / "jira-config.yml").write_text("just a string\n", encoding="utf-8")
+        executor = HookExecutor(tmp_path)
+        assert executor._evaluate_condition("config.x is set", "jira") is False

tests/test_workflows.py

@@ -260,6 +260,60 @@ class TestExpressions:
         ctx = StepContext(inputs={"text": "uses }} syntax"})
         assert evaluate_expression("{{ inputs.text | contains('}}') }}", ctx) is True
 
+    def test_multi_expression_with_literal_close_brace_in_argument(self):
+        """A multi-expression template with a literal ``}}`` inside a string
+        argument must interpolate, not raise. #3208/#3228 hardened the single-
+        expression fast path for literal braces but left the interpolation path
+        on ``_EXPR_PATTERN``, whose non-greedy body stops at the first ``}}`` --
+        so the block was captured truncated and the filter parser raised
+        ValueError."""
+        from specify_cli.workflows.expressions import evaluate_expression
+        from specify_cli.workflows.base import StepContext
+
+        ctx = StepContext(inputs={"name": "Bob", "missing": None})
+        # ``}}`` in the default fallback of the second block.
+        result = evaluate_expression(
+            "{{ inputs.name }}: {{ inputs.missing | default('}}') }}", ctx
+        )
+        assert result == "Bob: }}"
+        # ``}}`` in the first block, expression following it.
+        result = evaluate_expression(
+            "{{ inputs.missing | default('}}') }} / {{ inputs.name }}", ctx
+        )
+        assert result == "}} / Bob"
+
+    def test_multi_expression_with_literal_open_brace_in_argument(self):
+        """A literal ``{{`` inside a string argument in a multi-expression
+        template must not confuse block detection either."""
+        from specify_cli.workflows.expressions import evaluate_expression
+        from specify_cli.workflows.base import StepContext
+
+        ctx = StepContext(inputs={"name": "Bob", "missing": None})
+        result = evaluate_expression(
+            "{{ inputs.name }} {{ inputs.missing | default('{{') }}", ctx
+        )
+        assert result == "Bob {{"
+
+    def test_multi_expression_unbalanced_quote_still_raises(self):
+        """A malformed block (an unbalanced quote in a filter arg) must still
+        surface a ValueError, not be silently emitted verbatim.
+
+        The quote-aware scan never finds a block-closing ``}}`` when a quote is
+        left open, but a raw ``}}`` is still present in the tail. It must fall
+        back to that raw delimiter and evaluate — same as the old regex path —
+        so a typo fails loudly instead of being hidden (Copilot review on
+        #3307)."""
+        import pytest
+
+        from specify_cli.workflows.expressions import evaluate_expression
+        from specify_cli.workflows.base import StepContext
+
+        ctx = StepContext(inputs={"name": "Bob", "missing": None})
+        with pytest.raises(ValueError):
+            evaluate_expression(
+                "{{ inputs.name }} {{ inputs.missing | default('oops }}", ctx
+            )
+
     def test_comparison_equals(self):
         from specify_cli.workflows.expressions import evaluate_expression
         from specify_cli.workflows.base import StepContext
@@ -288,6 +342,35 @@ class TestExpressions:
         assert evaluate_expression("{{ steps.plan.output.task_count > 5 }}", ctx) is True
         assert evaluate_expression("{{ steps.plan.output.task_count < 5 }}", ctx) is False
 
+    def test_ordering_comparison_of_non_numeric_strings(self):
+        """`<`/`>`/`<=`/`>=` between non-numeric strings must compare
+        lexicographically, not silently return False.
+
+        `_safe_compare` used to coerce both operands to int/float unconditionally;
+        a non-numeric string (date, version tag, name) failed that coercion and
+        the whole comparison returned False. Ordinary strings should order the
+        way Python does; numeric strings must still compare as numbers."""
+        from specify_cli.workflows.expressions import evaluate_expression
+        from specify_cli.workflows.base import StepContext
+
+        # ISO dates compare lexicographically (correct chronological order).
+        ctx = StepContext(inputs={"d": "2026-01-01"})
+        assert evaluate_expression("{{ inputs.d < '2026-02-01' }}", ctx) is True
+        assert evaluate_expression("{{ inputs.d > '2026-02-01' }}", ctx) is False
+
+        # Plain string ordering.
+        ctx = StepContext(inputs={"name": "beta"})
+        assert evaluate_expression("{{ inputs.name > 'alpha' }}", ctx) is True
+
+        # Two numeric strings still compare numerically, not lexically
+        # ("10" > "9" is True as numbers; as strings it would be False).
+        ctx = StepContext(inputs={"v": "10"})
+        assert evaluate_expression("{{ inputs.v > '9' }}", ctx) is True
+
+        # A number vs a non-numeric string is genuinely incomparable -> False.
+        ctx = StepContext(inputs={"n": 5})
+        assert evaluate_expression("{{ inputs.n > 'abc' }}", ctx) is False
+
     def test_boolean_and(self):
         from specify_cli.workflows.expressions import evaluate_expression
         from specify_cli.workflows.base import StepContext
@@ -3977,6 +4060,48 @@ steps:
         assert state.status == RunStatus.ABORTED
         assert "should-not-run" not in state.step_results
 
+    def test_gate_reject_matches_case_insensitively(
+        self, project_dir, monkeypatch
+    ):
+        """A capitalised reject option (`options: [Approve, Reject]`) still
+        aborts the run. `validate` accepts a reject choice case-insensitively,
+        so the runtime reject check must agree — a case-sensitive comparison
+        would treat the echoed `Reject` as approval and silently run
+        downstream steps.
+        """
+        from specify_cli.workflows.engine import WorkflowDefinition, WorkflowEngine
+        from specify_cli.workflows.base import RunStatus
+        from specify_cli.workflows.steps.gate import GateStep
+
+        # `_prompt` echoes the option's original casing, so the operator
+        # picking "Reject" hands `execute` the capitalised string.
+        _force_gate_stdin(monkeypatch, tty=True)
+        monkeypatch.setattr(
+            GateStep, "_prompt", staticmethod(lambda _msg, _opts: "Reject")
+        )
+
+        definition = WorkflowDefinition.from_string("""
+schema_version: "1.0"
+workflow:
+  id: "gate-reject-case"
+  name: "Gate Reject Case"
+  version: "1.0.0"
+steps:
+  - id: gate-step
+    type: gate
+    message: "Approve?"
+    options: [Approve, Reject]
+    on_reject: abort
+  - id: should-not-run
+    type: shell
+    run: "echo nope"
+""")
+        engine = WorkflowEngine(project_dir)
+        state = engine.execute(definition)
+
+        assert state.status == RunStatus.ABORTED
+        assert "should-not-run" not in state.step_results
+
     def test_validation_rejects_non_bool_continue_on_error(self):
         """`continue_on_error` must be a literal boolean; coerced
         strings like `"true"` are rejected at validation time so

tests/unit/test_bundler_adapters.py

@@ -69,3 +69,30 @@ def test_http_fetch_rejects_non_https_final_url(monkeypatch):
     fetcher = adapters.make_catalog_fetcher(allow_network=True)
     with pytest.raises(BundlerError, match="must use HTTPS"):
         fetcher(_source("https://example.com/c.json"))
+
+
+@pytest.mark.parametrize(
+    "url",
+    [
+        "https://:8080",          # port only, no host
+        "https://:0",
+        "https://user@",          # userinfo only, no host
+        "https://user:pw@",
+        "https://:8080/catalog.json",
+    ],
+)
+def test_validate_remote_url_rejects_host_less_urls(url):
+    """A URL with a truthy netloc but no host (``https://:8080``,
+    ``https://user@``) must be rejected.
+
+    ``urlparse`` gives these a non-empty ``netloc`` but ``hostname is None``,
+    so a ``netloc`` check would wrongly accept them. This mirrors the fix in
+    ``specify_cli.catalogs`` (#3210), which the docstring says this validator
+    mirrors."""
+    with pytest.raises(BundlerError, match="valid URL with a host"):
+        adapters._validate_remote_url("team", url)
+
+
+def test_validate_remote_url_accepts_normal_https_url():
+    # Sanity: a real host with a port still passes.
+    adapters._validate_remote_url("team", "https://example.com:8080/c.json")

tests/unit/test_bundler_catalog_config.py

@@ -222,3 +222,39 @@ def test_add_source_allows_local_path_with_colon(tmp_path: Path, monkeypatch):
     # 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
+
+
+def test_add_source_rejects_plain_http_for_non_localhost(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    with pytest.raises(BundlerError, match="HTTPS"):
+        cc.add_source(project, "http://example.com/catalog.json", policy="install-allowed", priority=50)
+
+
+def test_add_source_allows_http_for_localhost(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    source = cc.add_source(project, "http://localhost:8080/c.json", policy="install-allowed", priority=50)
+    assert source.url == "http://localhost:8080/c.json"
+
+
+def test_add_source_rejects_host_less_remote_urls(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    for url in ("https://:8080", "https://user@"):
+        with pytest.raises(BundlerError, match="host"):
+            cc.add_source(project, url, policy="install-allowed", priority=50)
+
+
+def test_add_source_wraps_invalid_ipv6_as_bundler_error(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    with pytest.raises(BundlerError, match="Invalid catalog url"):
+        cc.add_source(project, "https://[::1/c.json", policy="install-allowed", priority=50)
+
+
+def test_remove_source_does_not_crash_on_invalid_ipv6(tmp_path: Path):
+    project = tmp_path / "proj"
+    (project / ".specify").mkdir(parents=True)
+    with pytest.raises(BundlerError, match="No project-scoped catalog source"):
+        cc.remove_source(project, "https://[::1/c.json")