Deadman chip: the dead man's switch earns a spot next to the path - #11
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A session with an armed deadman switch looks identical to one without — until the handoff fires. The chip closes that gap: [☠ armed 42m] (dim) counts down on the left lane, escalating to yellow at warned/due. It keys on the session id the CLI reports for this very render, and it lives with path and branch because it is a lifecycle fact about this session, not a quota. The tool is optional, so absence is the hot path: one builtin `command -v` and the builder is out — no subshell, no state, no width. Nothing armed (empty chip output) renders nothing too, which also makes the negative integration test safe on hosts that really have deadman installed. ☠ (U+2620) stays text-presentation, single column, same padding rationale as the ≡ cache glyph. Tests: 321 -> 331 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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What
A new optional left-lane chip surfacing deadman — the dead man's switch that writes the handoff before your prompt cache dies:
[☠ armed 42m](dim) — switch armed, counting down to the auto-handoff[☠ warned 3m](yellow) — the phone warning went out[☠ due](yellow) — fire imminent/overdueWhy the left lane
The chip is a lifecycle fact about this session — like path and branch, unlike the quota cluster on the right. Armed is calm bookkeeping (DIM); warned/due escalate to the STATUS-lane yellow.
Cost discipline
Absence is the hot path: one builtin
command -vand the builder returns — no subshell, no render, no width. When installed,deadman chip <session_id>is a single PID-checked file read (that's the tool's documented statusline contract). Keys onstdin_session_id, the id the CLI reports for this very render.--deadman off/STATUSLINE_DEADMAN=offdisables it. ☠ (U+2620) stays text-presentation single-column — same padding rationale as the≡cache glyph; no U+FE0F.Tests
321 → 331 bats, all green;
shellcheck -S errorclean. Unit tests cover the three states, color escalation, zero-cost absence (a marker file proves the tool is never invoked in off/empty-session paths), plus three end-to-end renders through--test.🤖 Generated with Claude Code