Guard

Preamble (run first)

setopt +o nomatch 2>/dev/null || true  # zsh compat
_GD_VERSION="0.5.0"
# Find gstack-game bin directory (installed in project or standalone)
_GG_BIN=""
for _p in ".claude/skills/gstack-game/bin" ".claude/skills/game-review/../../gstack-game/bin" "$(dirname "$(readlink -f .claude/skills/game-review/SKILL.md 2>/dev/null)" 2>/dev/null)/../../bin"; do
  [ -f "$_p/gstack-config" ] && _GG_BIN="$_p" && break
done
[ -z "$_GG_BIN" ] && echo "WARN: gstack-game bin/ not found, some features disabled"

# Project identification
_SLUG=$(basename "$(git rev-parse --show-toplevel 2>/dev/null || pwd)")
_BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
_USER=$(whoami 2>/dev/null || echo "unknown")

# Session tracking
mkdir -p ~/.gstack/sessions
touch ~/.gstack/sessions/"$PPID"
_PROACTIVE=$([ -n "$_GG_BIN" ] && "$_GG_BIN/gstack-config" get proactive 2>/dev/null || echo "true")
_TEL_START=$(date +%s)
_SESSION_ID="$-$(date +%s)"

# Shared artifact storage (cross-skill, cross-session)
mkdir -p ~/.gstack/projects/$_SLUG
_PROJECTS_DIR=~/.gstack/projects/$_SLUG

# Telemetry (sanitize inputs before JSON interpolation)
mkdir -p ~/.gstack/analytics
_SLUG_SAFE=$(printf '%s' "$_SLUG" | tr -d '"\\\n\r\t')
_BRANCH_SAFE=$(printf '%s' "$_BRANCH" | tr -d '"\\\n\r\t')
echo '{"skill":"guard","ts":"'$(date -u +%Y-%m-%dT%H:%M:%SZ)'","repo":"'"$_SLUG_SAFE"'","branch":"'"$_BRANCH_SAFE"'"}'  >> ~/.gstack/analytics/skill-usage.jsonl 2>/dev/null || true

echo "SLUG: $_SLUG"
echo "BRANCH: $_BRANCH"
echo "PROACTIVE: $_PROACTIVE"
echo "PROJECTS_DIR: $_PROJECTS_DIR"
echo "GD_VERSION: $_GD_VERSION"

# Artifact summary
_ARTIFACT_COUNT=$(ls "$_PROJECTS_DIR"/*.md 2>/dev/null | wc -l | tr -d ' ')
[ "$_ARTIFACT_COUNT" -gt 0 ] && echo "Artifacts: $_ARTIFACT_COUNT files in $_PROJECTS_DIR" && ls -t "$_PROJECTS_DIR"/*.md 2>/dev/null | head -5 | while read f; do echo "  $(basename "$f")"; done

Shared artifact directory: $_PROJECTS_DIR (~/.gstack/projects/{slug}/) stores all skill outputs:

• Design docs from /game-ideation
• Review reports from /game-review, /balance-review, etc.
• Player journey maps from /player-experience

All skills read from this directory on startup to find prior work. All skills write their output here for downstream consumption.

If PROACTIVE is "false", do not proactively suggest gstack-game skills.

User Sovereignty

AI models recommend. You decide. When this skill finds issues, proposes changes, or a cross-model second opinion challenges a premise — the finding is presented to you, not auto-applied. Cross-model agreement is a strong signal, not a mandate. Your direction is the default unless you explicitly change it.

Public Output Redaction Lite

Before writing or sharing public/semi-public output, scan the exact text when $_GG_BIN/gstack-game-redact exists:

printf '%s' "$OUTPUT_TEXT" | "$_GG_BIN/gstack-game-redact" --json

Use this for PR bodies, patch notes, Steam/App Store/Google Play submission text, publisher updates, imported GDD excerpts, release docs, playtest summaries, and game-autoplan artifacts that leave the repo.

HIGH findings block the output until removed and, for credentials, rotated. MEDIUM findings require explicit user review or safe redaction before publishing. Game-specific MEDIUM examples: player email/phone, platform NDA wording, publisher-confidential notes, unreleased platform dates, and named community member reports.

Completion Status Protocol

DONE / DONEWITHCONCERNS / BLOCKED / NEEDS_CONTEXT. Escalation after 3 failed attempts.

Telemetry (run last)

_TEL_END=$(date +%s)
_TEL_DUR=$(( _TEL_END - _TEL_START ))
[ -n "$_GG_BIN" ] && "$_GG_BIN/gstack-telemetry-log" \
  --skill "guard" --duration "$_TEL_DUR" --outcome "OUTCOME" \
  --used-browse "false" --session-id "$_SESSION_ID" 2>/dev/null &

/guard: Full Safety Mode

Activates BOTH destructive command safety (/careful) AND file edit scope restriction.

Activation

AskUserQuestion: What directory should I restrict edits to?

• A) Current feature directory (auto-detect from recent git changes)
• B) Specific path: [user provides path]
• C) Only files in current PR/branch diff

Scope Restriction

When active, before any Edit/Write tool call:

1. Check if target file is within the allowed scope
2. If outside scope:

> 🛡️ GUARD MODE: This file is outside the allowed scope. > Scope: [allowed directory] > Target: [file being edited] > > This edit is BLOCKED. To proceed, either: > A) Expand scope to include this file > B) Temporarily bypass for this one edit > C) Deactivate guard mode

Careful Mode (included)

All /careful protections are also active. See /careful for destructive command warnings.

Use Cases

• During a focused bug fix: Guard to only the affected module
• During asset work: Guard to only asset directories (don't accidentally change code)
• During balance tuning: Guard to only data/config files (don't change game logic)

Deactivation

Say "turn off guard mode" or start a new session.

Review Log

[ -n "$_GG_BIN" ] && "$_GG_BIN/gstack-review-log" '{"skill":"guard","timestamp":"TIMESTAMP","status":"ACTIVATED","scope":"SCOPE","commit":"COMMIT"}' 2>/dev/null || true

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: fagemx
• Source: fagemx/gstack-game
• License: MIT

Install and usage instructions live in the source repository linked above.