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Garry TanandClaude Fable 5
5d6804cb61
Red team reviewed what four specialists missed — cross-cutting and self-contradiction class: CRITICAL: the release-body banner tripwire failed OPEN on the exact leak it guards (grep -c prints 0 AND exits 1 on no-match, so a fallback echo double-emitted "0" twice and the -gt comparison fell into the clean branch) — counts now default via parameter expansion, and a functional drift test executes the rendered tripwire block against a 0->1 banner delta to prove the ABORT branch fires. CRITICAL: evidence fingerprints were captured AFTER the child exited, so a working-tree edit made DURING a long suite was certified as tested content — wtree is now captured before spawn and re-checked after; mid-run drift omits the fingerprint (grades STALE) with a warning. Also: the review-grading rule dropped its dirty-gates (they nullified the keystone dirty-record->commit->CURRENT property that evidence checks already honor — wtree equality alone proves identical content); careful's HIGH force-push tier falls back to probing origin/main|master when the origin/HEAD symbolic ref is absent (Conductor worktrees — the tier was silently inert in the primary deploy environment); quoted tokens (rm -rf "/", push "main") no longer dodge the deny; freeze fails CLOSED when its own helper file is missing (bash makes a missing source target fatal non-interactively, so an existence pre-check guards it); spec dedupe distinguishes pipeline failure from zero matches instead of silently skipping dedupe on gh/jq breakage; land 3.5b sets the cross-session --expect-cmd mismatch expectation; hook analytics JSON fields are encoder-built per this wave's own rule. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
82 lines
4.2 KiB
Bash
82 lines
4.2 KiB
Bash
#!/usr/bin/env bash
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# hook-extract.sh — SHARED JSON helpers for gstack PreToolUse hooks.
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# Sourced (never executed) by careful/bin/check-careful.sh and
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# freeze/bin/check-freeze.sh via a path relative to each hook script.
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#
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# ONE copy on purpose. These two hooks previously carried separate extractor
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# copies; the escaped-quote truncation bug got fixed in careful's copy while
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# freeze silently kept the broken one. Any future parsing fix lands here and
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# reaches both hooks by construction.
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# gstack_hook_extract_field PAYLOAD FIELD
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# Prints tool_input.FIELD when PAYLOAD is valid JSON and the field is a
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# string ("" when absent or non-string). Returns 1 when no parser is
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# available or the payload is not parseable JSON — the CALLER decides the
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# polarity for that case (careful asks, freeze denies).
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#
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# python3 is tried first because it ships with macOS and most Linux distros
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# and is reliably on PATH in a hook environment; node is the fallback.
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gstack_hook_extract_field() {
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_ghef_payload="$1"
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_ghef_field="$2"
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if command -v python3 >/dev/null 2>&1; then
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printf '%s' "$_ghef_payload" | python3 -c 'import sys,json
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field = sys.argv[1]
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d = json.loads(sys.stdin.read())
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c = d.get("tool_input", {}).get(field, "")
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sys.stdout.write(c if isinstance(c, str) else "")' "$_ghef_field" 2>/dev/null && return 0
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fi
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if command -v node >/dev/null 2>&1; then
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printf '%s' "$_ghef_payload" | node -e 'let s="";process.stdin.on("data",d=>s+=d).on("end",()=>{try{const j=JSON.parse(s);const c=(j&&j.tool_input&&j.tool_input[process.argv[1]])||"";process.stdout.write(typeof c==="string"?c:"")}catch(e){process.exit(3)}})' "$_ghef_field" 2>/dev/null && return 0
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fi
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return 1
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}
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# gstack_hook_json_string TEXT
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# Prints TEXT as a JSON string literal (surrounding quotes included),
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# encoding quotes, backslashes, control characters and newlines. Never build
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# hook JSON with printf/sed interpolation: a path containing a quote or a
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# newline produces malformed JSON, and Claude Code silently ignores the
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# whole decision — a deny that no-ops exactly when it matters.
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gstack_hook_json_string() {
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_ghjs_text="$1"
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if command -v python3 >/dev/null 2>&1; then
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printf '%s' "$_ghjs_text" | python3 -c 'import sys,json; sys.stdout.write(json.dumps(sys.stdin.read()))' 2>/dev/null && return 0
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fi
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if command -v node >/dev/null 2>&1; then
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printf '%s' "$_ghjs_text" | node -e 'let s="";process.stdin.on("data",d=>s+=d).on("end",()=>process.stdout.write(JSON.stringify(s)))' 2>/dev/null && return 0
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fi
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# Last-resort fallback (no parser on PATH): strip to a safe charset so the
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# envelope stays valid JSON even if the message loses characters.
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printf '"%s"' "$(printf '%s' "$_ghjs_text" | tr -cd 'a-zA-Z0-9 ._/:@=+-' )"
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}
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# gstack_hook_decision DECISION REASON
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# Emits the full PreToolUse hookSpecificOutput envelope with REASON safely
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# JSON-encoded. DECISION is "ask" or "deny". The decision MUST be nested
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# under hookSpecificOutput — Claude Code ignores a top-level
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# permissionDecision, which silently no-ops the block.
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gstack_hook_decision() {
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_ghd_decision="$1"
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_ghd_reason="$2"
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_ghd_encoded=$(gstack_hook_json_string "$_ghd_reason")
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printf '{"hookSpecificOutput":{"hookEventName":"PreToolUse","permissionDecision":"%s","permissionDecisionReason":%s}}\n' "$_ghd_decision" "$_ghd_encoded"
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}
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# gstack_hook_log_fire SKILL PATTERN
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# Append a hook_fire analytics record (pattern name only, never command
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# content). Respects GSTACK_HOME so tests never pollute the operator's real
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# analytics file. Best-effort: failures never affect the hook decision.
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gstack_hook_log_fire() {
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_ghlf_dir="${GSTACK_HOME:-$HOME/.gstack}/analytics"
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mkdir -p "$_ghlf_dir" 2>/dev/null || true
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# Fields are JSON-encoded (a repo basename can carry quotes/backslashes) —
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# same rule this file states for decisions: never raw-interpolate into JSON.
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_ghlf_repo=$(basename "$(git rev-parse --show-toplevel 2>/dev/null)" 2>/dev/null || echo "unknown")
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printf '{"event":"hook_fire","skill":%s,"pattern":%s,"ts":"%s","repo":%s}\n' \
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"$(gstack_hook_json_string "$1")" \
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"$(gstack_hook_json_string "$2")" \
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"$(date -u +%Y-%m-%dT%H:%M:%SZ)" \
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"$(gstack_hook_json_string "$_ghlf_repo")" >> "$_ghlf_dir/skill-usage.jsonl" 2>/dev/null || true
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}
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