Files
gstack/guard/SKILL.md.tmpl
Garry Tanandcapy-ai[bot] c7edf46bcf v1.91.47.0 fix(careful,freeze): safety hooks cover PowerShell and NotebookEdit (#3077)
* fix(careful): check PowerShell tool commands and nested pwsh/cmd (#3067)

/careful and /guard matched only the Bash tool, so on Windows, where
Claude Code's PowerShell tool is the primary shell, the guard never ran.
check-careful.sh also had no PowerShell or cmd patterns.

- careful/guard register a PowerShell matcher beside Bash.
- hook-extract.sh gains gstack_hook_extract_tool: one parser call reads
  tool_name with the field, so dispatch adds no fork.
- check-careful.sh runs one PowerShell/cmd pattern table on PowerShell
  tool commands and on the tail of any Bash command that launches
  pwsh/powershell/cmd: Remove-Item and aliases with -Recurse/-Force
  prefixes, rd/rmdir/del/erase /s, Format-Volume, Clear-Disk,
  Clear-Content, [IO.Directory]/[IO.File]::Delete, and asks with an
  explanation for -EncodedCommand, iex, Start-Process of a shell and
  & $cmd. Command-position anchors keep Bash negative controls allowed.
- /careful documents the coverage as best-effort and points to Claude
  Code permission deny rules.

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* fix(freeze): NotebookEdit respects the freeze boundary (#3067)

NotebookEdit was in no freeze/guard/investigate matcher, and
check-freeze.sh read only file_path, so notebook edits ignored /freeze on
every platform. NotebookEdit carries tool_input.notebook_path.

- freeze, guard and investigate register a NotebookEdit matcher beside
  Edit and Write.
- check-freeze.sh reads file_path, then notebook_path, through the shared
  extractor; denials name the tool, the field, the boundary and
  /unfreeze. A helper without the combined reader denies as out of date.

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* test: run hook-scripts on the Windows lane (#3067)

The careful/freeze hooks are Windows coverage, but test/hook-scripts.test.ts
was excluded from windows-free-tests by the raw /tmp/ pattern; its /tmp/
literals are payload strings that are never opened. Admit it by name and
gate the three cases Windows runners cannot host: a symlink (no Developer
Mode), a newline in a directory name, and a POSIX ':' PATH prefix.

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* chore(evals): check-careful.sh is free-only for PR selection

No paid fixture copies or runs careful/bin/check-careful.sh (the
investigate boundary fixture copies hook-extract.sh and check-freeze.sh
only); test/hook-scripts.test.ts covers it. As an unknown dependency it
restored the full paid gate on every /careful hook change.

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* test(careful): pin the #3067 Invoke-Sqlcmd DROP TABLE example on the PowerShell tool

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* chore(evals): record the check-careful.sh selection change as non-behavioral

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* docs: /careful covers PowerShell (best-effort), /freeze covers NotebookEdit (#3067)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* chore: release v1.91.37.0 (CHANGELOG, TODOS for deferred hook follow-ups)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* chore: re-slot release to v1.91.39.0 (v1.91.37.0 and v1.91.38.0 claimed by #3075, #3076)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* chore: re-slot release to v1.91.41.0 (merge-queue reservation)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* fix(careful): hook payload reader survives Windows text-mode Python and backslash source paths

windows-free-tests (run 37739845723) showed every PowerShell-tool case
falling through: Python's text-mode stdout on Windows wrote tool_name as
"PowerShell\r", so dispatch never matched, and freeze denials carried
stray CRs. gstack_hook_extract_tool now reads and writes bytes.

hook-extract.sh also located gstack-state-root.sh with ${BASH_SOURCE%/*},
which strips nothing when the file is sourced through a C:\... path, so
gstack_hook_state_root vanished (state-root parity case on the same run).

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* fix(evals): PR lane selects office-hours-auto-mode by its real test name

The PR paid lane filters audited files with -t built from
CASE_TEST_NAMES[id] ?? id. office-hours-auto-mode's Bun test is named
'AskUserQuestion surfaces when --disallowedTools AskUserQuestion is set',
so the filter matched 0 tests and the shard failed (#3077 eval-slices (6),
run 37741434771). Map the label, and check every audited PR-profile case
is addressable by name. Recorded as non-behavioral for HARNESS_VERSION.

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* chore: CHANGELOG notes for the Windows CRLF and PR-lane name fixes

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

* chore: re-slot release to v1.91.47.0 (merge-queue assignment)

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

---------

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>
2026-10-08 08:18:26 +00:00

89 lines
3.9 KiB
Cheetah

---
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". (gstack)
triggers:
- full safety mode
- guard against mistakes
- maximum safety
allowed-tools:
- Bash
- Read
- AskUserQuestion
hooks:
PreToolUse:
- matcher: "Bash"
hooks:
- type: command
command: 'bash -c "exec bash \"$HOME/.claude/skills/gstack/careful/bin/check-careful.sh\""'
statusMessage: "Checking for destructive commands..."
- matcher: "PowerShell"
hooks:
- type: command
command: 'bash -c "exec bash \"$HOME/.claude/skills/gstack/careful/bin/check-careful.sh\""'
statusMessage: "Checking for destructive commands..."
- matcher: "Edit"
hooks:
- type: command
command: 'bash -c "exec bash \"$HOME/.claude/skills/gstack/freeze/bin/check-freeze.sh\""'
statusMessage: "Checking freeze boundary..."
- matcher: "Write"
hooks:
- type: command
command: 'bash -c "exec bash \"$HOME/.claude/skills/gstack/freeze/bin/check-freeze.sh\""'
statusMessage: "Checking freeze boundary..."
- matcher: "NotebookEdit"
hooks:
- type: command
command: 'bash -c "exec bash \"$HOME/.claude/skills/gstack/freeze/bin/check-freeze.sh\""'
statusMessage: "Checking freeze boundary..."
sensitive: true
---
# /guard — Full Safety Mode
Activates both destructive command warnings and directory-scoped edit restrictions.
This is the combination of `/careful` + `/freeze` in a single command.
**Dependency note:** This skill references hook scripts from the sibling `/careful`
and `/freeze` skill directories. Both must be installed (they are installed together
by the gstack setup script).
```bash
GSTACK_STATE_ROOT=$(~/.claude/skills/gstack/bin/gstack-paths --get GSTACK_STATE_ROOT); : "${GSTACK_STATE_ROOT:?gstack-paths failed; reinstall with ./setup or /gstack-upgrade}"
mkdir -p "$GSTACK_STATE_ROOT"/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_STATE_ROOT"/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:
Set the user-selected boundary with the shared writer, which resolves a physical absolute path and serializes replacement with investigation cleanup:
```bash
bash "{{RUNTIME_ROOT}}/freeze/bin/freeze-state.sh" set "<user-provided-path>"
```
On helper failure, do not claim the boundary is active. Preserve the state and report recovery; never bypass the shared writer with a direct write or deletion.
Tell the user:
- "**Guard mode active.** Two protections are now running:"
- "1. **Destructive command guard** — rm -rf, DROP TABLE, force-push, etc. warn before executing (overridable); catastrophic shapes (recursive delete of / or ~, force-push to the default branch) are hard-denied"
- "2. **Edit boundary** — file edits restricted to `<path>/`. Edits outside this directory are blocked."
- "To remove the persistent edit boundary, run `/unfreeze`. Ending the session stops its hooks but does not delete that boundary."
## What's protected
See `/careful` for the full list of destructive command patterns and safe exceptions.
See `/freeze` for how edit boundary enforcement works.