Files
github-spec-kit/extensions/agent-context/README.md
Copilot 50da3a0f77 Extract agent context updates into bundled agent-context extension (#2546)
* Initial plan

* Extract agent context updates into bundled agent-context extension

* Potential fix for pull request finding 'Unused import'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

* Potential fix for pull request finding 'Unused import'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

* fix: address review comments on agent-context extension

- bash: parse init-options.json with a single python3 invocation instead
  of three separate read_json_field calls, for parity with the PowerShell
  ConvertFrom-Json approach and to avoid divergent error semantics
- bash: use parameter expansion to strip PROJECT_ROOT prefix from plan
  path instead of sed interpolation, avoiding special-character fragility
- powershell: limit Get-ChildItem to -Depth 1 so plan.md discovery matches
  the bash glob specs/*/plan.md (one level deep) — fixes cross-platform
  inconsistency with nested plan.md files
- powershell: replace Substring+Length relative-path with
  [System.IO.Path]::GetRelativePath for robustness across case/PSDrive
  differences
- __init__.py: move agent-context extension install to after
  save_init_options so init-options.json is present when hooks run
- __init__.py: seed context_markers in init-options only when
  context_file is truthy; avoids noise for integrations without a context
  file
- integrations/base.py: narrow blanket except Exception in
  _resolve_context_markers to ImportError / (OSError, ValueError) so
  unexpected bugs surface instead of being silently swallowed

* fix: gate context_markers in _update_init_options_for_integration on context_file

Apply the same gating logic used during `specify init`: only write
context_markers to init-options.json when the integration actually has a
context_file set.  When switching to an integration without a context file
the stale markers are removed, keeping the two init paths consistent.

* fix: move context_file/context_markers from init-options.json to agent-context extension config

* Potential fix for pull request finding 'Unused global variable'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

* fix: clarify local import comment in agents.py

* Fix remaining agent-context review findings

* Fix follow-up agent-context review issues

* Address review feedback: narrow except, improve PyYAML messaging, surface config-written note

* Fix double-space in PyYAML install hint message

* Potential fix for pull request finding 'Empty except'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

* Potential fix for pull request finding 'Empty except'

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

* Address latest agent-context review feedback

* Harden bash config parse output handling

* Clarify ImportError-only fallback comment

* Apply review feedback: drop dead try/except, guard ext-config creation, explicit ConvertFrom-Yaml check

* Remove redundant $Options = $null in PS1 catch block

* Add constitution directives, deprecation warning, agent-context auto-install, and init flow fix

- Add constitution-loading directive to specify, clarify, tasks, checklist, taskstoissues commands
- Add deprecation warning (v0.12.0) in upsert_context_section()
- Auto-install agent-context extension during specify init
- Move context_file from init-options.json to agent-context extension config
- Add tests: deprecation warning, corrupt config, constitution directives
- Update file inventories across all integration tests

* Address review: fix init ordering, test coverage, and hermes inventory

- Move agent-context extension install after init-options.json is saved
  so skill registration can read ai_skills + integration key
- Write extension config after install (avoids template overwriting context_file)
- Fix test_defaults_when_markers_field_missing to truly test missing markers key
- Update hermes tests to allow extension-installed agent-context skill

* Address review: chmod ordering, preserve markers, PS1 Python check, YAML key order

- Move ensure_executable_scripts after agent-context extension install
  so extension scripts get execute bits set
- Use preserve_markers=True on reinit to keep user-customized markers
- Add Python 3 version check in PowerShell fallback (matching bash behavior)
- Add sort_keys=False to yaml.safe_dump for stable config output

* Address review: path traversal guards and docstring fix

- Reject absolute paths and '..' segments in context_file in both bash and
  PowerShell scripts to prevent writes outside the project root
- Fix docstring in _update_init_options_for_integration to accurately
  describe marker preservation behavior

* Address review: strict enabled check, docstring, segment-level path traversal

- Use 'is not False' for enabled check so only literal False disables
- Update upsert_context_section docstring to mention disabled-extension return
- Fix path traversal guards to check actual path segments, not substrings
  (allows filenames like 'notes..md' while rejecting '../' traversal)

* Address review: UnicodeError handling, missing extension warning

- Add UnicodeError to exception tuples in _load_agent_context_config and
  _resolve_context_markers so garbled UTF-8 config files fall back to defaults
- Emit error (with reinstall command) instead of silent skip when bundled
  agent-context extension is not found during init

* Address review: bash backslash traversal guard, wheel packaging

- Reject backslash separators and Windows drive-letter paths in bash
  context_file validation (prevents traversal on Git-Bash/Windows)
- Add extensions/agent-context to pyproject.toml force-include so the
  bundled extension is included in wheel builds

* Address review: write extension config before init-options.json

- Reorder writes in _update_init_options_for_integration so the
  agent-context extension config is updated first; if it fails,
  init-options.json remains consistent with the previous state

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Manfred Riem <15701806+mnriem@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>
2026-05-30 06:37:18 -05:00

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Markdown

# Coding Agent Context Extension
This bundled extension manages the **coding agent context/instruction file** (e.g. `CLAUDE.md`, `.github/copilot-instructions.md`, `AGENTS.md`, `GEMINI.md`, …) for the active integration.
It owns the lifecycle of the managed section delimited by the configurable start/end markers (defaults: `<!-- SPECKIT START -->` / `<!-- SPECKIT END -->`).
## Why an extension?
Not every Spec Kit user wants Spec Kit to write into the coding agent's context file. Extracting this behavior into a dedicated extension lets users:
- **Opt out** entirely with `specify extension disable agent-context` — Spec Kit will then never create or modify the agent context file.
- **Customize the markers** by editing `.specify/extensions/agent-context/agent-context-config.yml` — both the Python layer and the bundled scripts honor the same `context_markers` value.
- **Refresh on demand** with `/speckit.agent-context.update`, or automatically through the hooks declared in `extension.yml` (`after_specify`, `after_plan`).
## Commands
| Command | Description |
|---------|-------------|
| `speckit.agent-context.update` | Refresh the managed section in the agent context file with the current plan path. |
## Configuration
All configuration flows through the extension's own config file at
`.specify/extensions/agent-context/agent-context-config.yml`:
```yaml
# Path to the coding agent context file managed by this extension
context_file: CLAUDE.md
# Delimiters for the managed Spec Kit section
context_markers:
start: "<!-- SPECKIT START -->"
end: "<!-- SPECKIT END -->"
```
- `context_file` — the project-relative path to the coding agent context file, written by `specify init` and `specify integration install`.
- `context_markers.start` / `.end` — the delimiters around the managed section. Edit these to use custom markers.
## Requirements
The bundled update scripts require **Python 3** with **PyYAML** for YAML/upsert processing (PowerShell can also use `ConvertFrom-Yaml` when available).
PyYAML ships with the `specify` CLI and is normally available via the same `python3` interpreter. If a hook reports *"PyYAML is required … not available in the current Python environment"*, it means the system `python3` differs from the one used to install Spec Kit. To resolve, run:
```bash
pip install pyyaml
# or target the specific interpreter Spec Kit uses:
/path/to/speckit-python -m pip install pyyaml
```
## Disable
```bash
specify extension disable agent-context
```
When disabled, Spec Kit skips context file creation, updates, and removal (the gates are inside `upsert_context_section()` and `remove_context_section()`).