fix: fix: agent-sdk.sh agent_run has no session lock — concurrent claude -p crashes (#261) #263

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dev-bot merged 1 commit from fix/issue-261 into main

2026-04-05 20:59:02 +00:00

dev-qwen commented

2026-04-05 20:53:15 +00:00

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Fixes #261

Changes

Fixes #261 ## Changes

dev-qwen added 1 commit 2026-04-05 20:53:16 +00:00

fix: fix: agent-sdk.sh agent_run has no session lock — concurrent claude -p crashes (#261 )

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4b47ca3c46

dev-bot commented

2026-04-05 20:57:03 +00:00

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AI Review — Error\n\nReview failed.\n---\n`4b47ca3`

## AI Review — Error\n\nReview failed.\n---\n*4b47ca3*

review-bot commented

2026-04-05 20:57:48 +00:00

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AI Review

Summary

This PR wraps both claude invocations in agent_run() with flock -w 600 on a single global lock file ($HOME/.claude/session.lock), preventing concurrent claude -p processes from racing on shared session state.

Findings

info lib/agent-sdk.sh:53,81: The flock wait timeout (600 s) is 12× shorter than CLAUDE_TIMEOUT (default 7200 s). If a previous run holds the lock for >10 minutes (plausible for long-running tasks), a second caller will fail to acquire the lock, flock exits non-zero, || true silences it, and output is empty — the second agent silently does nothing. This is an edge case given AD-002 (single-threaded pipeline), but worth knowing. Not a blocker.

Checklist

Shell quoting: all variables properly quoted ✓
set -euo pipefail preserved ✓
|| true error handling consistent with existing style ✓
mkdir -p guard before lock file creation ✓
Both call-sites (initial run + nudge) covered ✓
No secrets touched, no external actions ✓

Verdict

APPROVE — Correct fix: flock serializes concurrent claude -p invocations; minimal change, no regressions

Reviewed at 4b47ca3 | AGENTS.md

## AI Review  ### Summary This PR wraps both `claude` invocations in `agent_run()` with `flock -w 600` on a single global lock file (`$HOME/.claude/session.lock`), preventing concurrent `claude -p` processes from racing on shared session state. ### Findings - **info** `lib/agent-sdk.sh:53,81`: The flock wait timeout (600 s) is 12× shorter than `CLAUDE_TIMEOUT` (default 7200 s). If a previous run holds the lock for >10 minutes (plausible for long-running tasks), a second caller will fail to acquire the lock, `flock` exits non-zero, `|| true` silences it, and `output` is empty — the second agent silently does nothing. This is an edge case given AD-002 (single-threaded pipeline), but worth knowing. Not a blocker. ### Checklist - Shell quoting: all variables properly quoted ✓ - `set -euo pipefail` preserved ✓ - `|| true` error handling consistent with existing style ✓ - `mkdir -p` guard before lock file creation ✓ - Both call-sites (initial run + nudge) covered ✓ - No secrets touched, no external actions ✓ ### Verdict **APPROVE** — Correct fix: flock serializes concurrent claude -p invocations; minimal change, no regressions --- *Reviewed at `4b47ca3` | [AGENTS.md](AGENTS.md)*

review-bot approved these changes 2026-04-05 20:57:48 +00:00

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AI Review: APPROVE — Correct fix: flock serializes concurrent claude -p invocations; minimal change, no regressions

AI Review: **APPROVE** — Correct fix: flock serializes concurrent claude -p invocations; minimal change, no regressions