feat: safety hook skills + skill usage telemetry (v0.7.1) (#189)

* feat: add /careful, /freeze, /guard, /unfreeze safety hook skills

Four new on-demand skills using Claude Code's PreToolUse hooks:
- /careful: warns before destructive commands (rm -rf, DROP TABLE, force-push, etc.)
- /freeze: blocks file edits outside a specified directory
- /guard: composes both into one command
- /unfreeze: clears freeze boundary without ending session

Pure bash hook scripts with Python fallback for JSON edge cases.
Safe exceptions for build artifacts (node_modules, dist, .next, etc.).
Hook fire telemetry logs pattern name only (never command content).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: add skill usage telemetry to preamble

TemplateContext system passes skill name through resolver pipeline so
each generated SKILL.md gets its own name baked into the telemetry line.
Appends to ~/.gstack/analytics/skill-usage.jsonl on every invocation.

Covers 14 preamble-using skills + 4 hook skills (inline telemetry).
JSONL format: {"skill":"ship","ts":"...","repo":"my-project"}

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: add analytics CLI for skill usage stats

bun run analytics reads ~/.gstack/analytics/skill-usage.jsonl and shows
top skills, per-repo breakdown, hook fire stats, and daily timeline.
Supports --period 7d/30d/all. Handles missing/empty/malformed data.

22 unit tests cover parsing, filtering, formatting, and edge cases.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: add skills-used-this-week to /retro

Retro Step 2 now reads skill-usage.jsonl and shows which gstack skills
were used during the retro window. Follows the same pattern as the
Greptile signal and Backlog Health metrics — read file, filter by date,
aggregate, present. Skips silently if no analytics data exists.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* test: add hook script and telemetry tests

32 unit tests for check-careful.sh covering all 8 destructive patterns,
safe exceptions, Python fallback, and malformed input handling.
7 unit tests for check-freeze.sh covering boundary enforcement,
trailing slash edge case, and missing state file.
Telemetry tests verify per-skill name correctness in generated output.
Adds careful/freeze/guard/unfreeze/document-release to ALL_SKILLS.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: bump version to 0.6.5 + changelog + mark TODOs shipped

Safety hook skills and skill usage telemetry shipped.
Analytics CLI and /retro integration included.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: /debug auto-freezes edits to the module being debugged

Add PreToolUse hooks (Edit/Write) to debug/SKILL.md.tmpl that reference
the existing freeze/bin/check-freeze.sh. After Phase 1 investigation,
/debug locks edits to the narrowest affected directory.

Graceful degradation: if freeze script is unavailable, scope lock is
skipped. Users can run /unfreeze to remove the restriction.

Deferred 6 enhancements to TODOS.md, gated on telemetry showing the
freeze hook actually fires in real debugging sessions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Garry Tan
2026-03-18 23:57:59 -05:00
committed by GitHub
co-authored by Claude Opus 4.6
parent 2a206920ed
commit c4f679d829
37 changed files with 1754 additions and 36 deletions
+11
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@@ -1,5 +1,16 @@
# Changelog
## [0.7.3] - 2026-03-18
### Added
- **Safety guardrails you can turn on with one command.** Say "be careful" or "safety mode" and `/careful` will warn you before any destructive command — `rm -rf`, `DROP TABLE`, force-push, `kubectl delete`, and more. You can override every warning. Common build artifact cleanups (`rm -rf node_modules`, `dist`, `.next`) are whitelisted.
- **Lock edits to one folder with `/freeze`.** Debugging something and don't want Claude to "fix" unrelated code? `/freeze` blocks all file edits outside a directory you choose. Hard block, not just a warning. Run `/unfreeze` to remove the restriction without ending your session.
- **`/guard` activates both at once.** One command for maximum safety when touching prod or live systems — destructive command warnings plus directory-scoped edit restrictions.
- **`/debug` now auto-freezes edits to the module being debugged.** After forming a root cause hypothesis, `/debug` locks edits to the narrowest affected directory. No more accidental "fixes" to unrelated code during debugging.
- **You can now see which skills you use and how often.** Every skill invocation is logged locally to `~/.gstack/analytics/skill-usage.jsonl`. Run `bun run analytics` to see your top skills, per-repo breakdown, and how often safety hooks actually catch something. Data stays on your machine.
- **Weekly retros now include skill usage.** `/retro` shows which skills you used during the retro window alongside your usual commit analysis and metrics.
## [0.7.2] - 2026-03-18
### Fixed