cliffhanger: A Stop hook that makes Claude Code finish its task list unattended
Arthur122103 · reddit · 2026-10-01
Developer Arthur122103 released cliffhanger, a free MIT-licensed tool that fixes Claude Code runs stalling mid-task when unattended.
- How it works: A Stop hook plus a skill that inspects task lists created via TaskCreate, TodoWrite, or Markdown checklists; if actionable items remain, it blocks the stop and returns the reason so Claude Code keeps working.
- Legit stops still pass: named blockers, plan mode, background tasks, and a configurable continuation limit are respected.
- Benchmark: On a 12-task benchmark, Sonnet 5.5 skipped the test suite in 6/12 control runs vs 0/12 with cliffhanger enabled, at 4% extra cost.
- Author is seeking feedback on false blocks, missed task formats, and whether the allowed stop conditions match real agent workflows.
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