timothyandClaude Opus 4.8
35e41fdaad
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Wave 2 hook H7: never commit/merge inside a sibling worktree another session created (burned us on #289 path-leak + the plumbing-merge workaround). Ownership = a per-session .claude-worktree-owner marker: - posttooluse-worktree-marker.sh stamps a worktree with session_id on `git worktree add` (parses the <path> arg past -b/-B/--reason flags). - pretooluse-worktree-guard.sh denies `git commit`/`git merge` whose effective dir (resolves `git -C <p>` and leading `cd <p> &&`) is a worktree whose marker names a DIFFERENT session. Fail-open: no marker, unparsable, or own session -> allow. Main tree + pre-convention worktrees are never marked, so unaffected. Also completes Wave 1's rollout, which committed pretooluse-bash-guard.sh but left .claude/settings.json and the agent-ram/nav-guard hooks untracked (so nothing was actually wired). Adds the settings.json that registers all five hooks (PreToolUse Bash x2, nav, Agent; PostToolUse Bash) + the .gitignore worktree-marker line, screenshot-scratch rules, and the decisions.md TOC left uncommitted last session. All hooks pipe-tested (7 guard cases + 6 marker cases). Refs #303. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
15 lines
1023 B
Bash
Executable File
15 lines
1023 B
Bash
Executable File
#!/usr/bin/env bash
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# PreToolUse / Agent (subagent spawn) — RAM-gate the fan-out.
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# The historic 8-9-way crash was RAM starvation, not CPU load; gate on FREE RAM.
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# Fail-open: if memory_pressure is unavailable/unparsable → allow.
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set -euo pipefail
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free=$(memory_pressure -Q 2>/dev/null | grep -oE 'free percentage: [0-9]+' | grep -oE '[0-9]+' || true)
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[ -z "${free:-}" ] && exit 0
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if [ "$free" -lt 10 ]; then
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jq -n --arg f "$free" '{hookSpecificOutput:{hookEventName:"PreToolUse",permissionDecision:"deny",permissionDecisionReason:("Free RAM \($f)% (<10%): do NOT spawn more agents — the historic crash was RAM starvation from an 8-9-way fan-out. Wait for memory_pressure -Q to recover, then retry.")}}'
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elif [ "$free" -lt 20 ]; then
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jq -n --arg f "$free" '{hookSpecificOutput:{hookEventName:"PreToolUse",permissionDecision:"ask",permissionDecisionReason:("Free RAM \($f)% (<20%): near the fan-out ceiling. Confirm before adding another build/implementer agent (read-only recon agents are cheap).")}}'
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fi
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exit 0
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