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gstack/guard/SKILL.md
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Garry Tan c4f679d829 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>
2026-03-18 23:57:59 -05:00

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Markdown

---
name: guard
version: 0.1.0
description: |
Full safety mode: destructive command warnings + directory-scoped edits.
Combines /careful (warns before rm -rf, DROP TABLE, force-push, etc.) with
/freeze (blocks edits outside a specified directory). Use for maximum safety
when touching prod or debugging live systems. Use when asked to "guard mode",
"full safety", "lock it down", or "maximum safety".
allowed-tools:
- Bash
- Read
- AskUserQuestion
hooks:
PreToolUse:
- matcher: "Bash"
hooks:
- type: command
command: "bash ${CLAUDE_SKILL_DIR}/../careful/bin/check-careful.sh"
statusMessage: "Checking for destructive commands..."
- matcher: "Edit"
hooks:
- type: command
command: "bash ${CLAUDE_SKILL_DIR}/../freeze/bin/check-freeze.sh"
statusMessage: "Checking freeze boundary..."
- matcher: "Write"
hooks:
- type: command
command: "bash ${CLAUDE_SKILL_DIR}/../freeze/bin/check-freeze.sh"
statusMessage: "Checking freeze boundary..."
---
<!-- AUTO-GENERATED from SKILL.md.tmpl — do not edit directly -->
<!-- Regenerate: bun run gen:skill-docs -->
# /guard — Full Safety Mode
Activates both destructive command warnings and directory-scoped edit restrictions.
This is the combination of `/careful` + `/freeze` in a single command.
**Dependency note:** This skill references hook scripts from the sibling `/careful`
and `/freeze` skill directories. Both must be installed (they are installed together
by the gstack setup script).
```bash
mkdir -p ~/.gstack/analytics
echo '{"skill":"guard","ts":"'$(date -u +%Y-%m-%dT%H:%M:%SZ)'","repo":"'$(basename "$(git rev-parse --show-toplevel 2>/dev/null)" 2>/dev/null || echo "unknown")'"}' >> ~/.gstack/analytics/skill-usage.jsonl 2>/dev/null || true
```
## Setup
Ask the user which directory to restrict edits to. Use AskUserQuestion:
- Question: "Guard mode: which directory should edits be restricted to? Destructive command warnings are always on. Files outside the chosen path will be blocked from editing."
- Text input (not multiple choice) — the user types a path.
Once the user provides a directory path:
1. Resolve it to an absolute path:
```bash
FREEZE_DIR=$(cd "<user-provided-path>" 2>/dev/null && pwd)
echo "$FREEZE_DIR"
```
2. Ensure trailing slash and save to the freeze state file:
```bash
FREEZE_DIR="${FREEZE_DIR%/}/"
STATE_DIR="${CLAUDE_PLUGIN_DATA:-$HOME/.gstack}"
mkdir -p "$STATE_DIR"
echo "$FREEZE_DIR" > "$STATE_DIR/freeze-dir.txt"
echo "Freeze boundary set: $FREEZE_DIR"
```
Tell the user:
- "**Guard mode active.** Two protections are now running:"
- "1. **Destructive command warnings** — rm -rf, DROP TABLE, force-push, etc. will warn before executing (you can override)"
- "2. **Edit boundary** — file edits restricted to `<path>/`. Edits outside this directory are blocked."
- "To remove the edit boundary, run `/unfreeze`. To deactivate everything, end the session."
## What's protected
See `/careful` for the full list of destructive command patterns and safe exceptions.
See `/freeze` for how edit boundary enforcement works.