KeiSeiKit-1.0/hooks/agent-fork-logger.sh
Parfii-bot da0f2cb42b feat(hooks): runtime controls via KEI_DISABLED_HOOKS + KEI_HOOK_PROFILE (v0.14.2)
10 hooks get 21-line guard block: env-var short-circuit, 4 profiles (full/advisory-off/minimal/off), per-hook disable.

Safety-critical preserved in 'minimal': no-hand-edit-agents, assemble-validate, git-pre-commit-genesis.
Advisory off list: recurrence-suggest, citation-verify, error-spike-detector, milestone-commit-hook.

skills/hooks-control/SKILL.md — click-only toggle emitting shell export commands.
README +27 LOC 'Runtime hook controls' section with examples.
2026-04-22 13:51:48 +08:00

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#!/bin/sh
# agent-fork-logger.sh — PreToolUse:Agent advisory hook (RULE 0.12).
#
# Reads the Agent tool invocation JSON from stdin and, if kei-ledger is on
# PATH, logs a fork row so the orchestrator can later validate the bundle.
# NEVER blocks: every exit path is `exit 0`. Hard-dependency absent (no jq,
# no kei-ledger, no git) → silent no-op.
command -v jq >/dev/null 2>&1 || exit 0
# --- RUNTIME CONTROLS (v0.14.2) ---
_hook_name="$(basename "$0" .sh)"
case "${KEI_DISABLED_HOOKS:-}" in
*"$_hook_name"*|*all*) exit 0 ;;
esac
case "${KEI_HOOK_PROFILE:-full}" in
off) exit 0 ;;
minimal)
case "$_hook_name" in
no-github-push|genesis-leak-guard|no-hand-edit-agents|secrets-guard|assemble-validate|git-pre-commit-genesis) ;;
*) exit 0 ;;
esac
;;
advisory-off)
case "$_hook_name" in
recurrence-suggest|citation-verify|error-spike-detector|milestone-commit-hook) exit 0 ;;
esac
;;
full|*) ;;
esac
# --- end runtime controls ---
set -eu
input="$(cat)"
# Extract subagent_type / prompt / isolation from the Agent tool_input.
subagent=$(printf '%s' "$input" | jq -r '.tool_input.subagent_type // empty' 2>/dev/null || true)
prompt=$(printf '%s' "$input" | jq -r '.tool_input.prompt // empty' 2>/dev/null || true)
isolation=$(printf '%s' "$input" | jq -r '.tool_input.isolation // empty' 2>/dev/null || true)
# No subagent name → not an agent call we know how to track.
if [ -z "$subagent" ]; then
exit 0
fi
# Spec fingerprint = first 16 hex chars of SHA-256(prompt).
spec_sha=$(printf '%s' "$prompt" | shasum -a 256 2>/dev/null | cut -c1-16)
spec_sha=${spec_sha:-unknown}
ts=$(date +%s)
agent_id="${subagent}-${ts}"
if [ "$isolation" = "worktree" ]; then
branch="agent/${subagent}-${ts}"
else
branch="inline-${subagent}-${ts}"
fi
# Current git branch (if we're inside a repo). Non-fatal if git absent.
current_branch=$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo none)
# If kei-ledger is unavailable, bail silently — the hook is advisory only.
command -v kei-ledger >/dev/null 2>&1 || exit 0
# Emit the fork row. Always exit 0 even if kei-ledger returns non-zero:
# the hook must never block an Agent invocation on ledger trouble.
kei-ledger fork "$agent_id" "$branch" \
--parent "$current_branch" \
--spec-sha "$spec_sha" \
>/dev/null 2>&1 || true
exit 0