Other

/pane-liveness-check

Use when auditing cmux panes for claim-or-close, sprint close-out, idle workers, dead shells, uncommitted or unpushed artifacts, untitled seats, or stale numeric surface refs.

$ golems-cli skills install pane-liveness-check

94% best pass rate

18 assertions

6 evals

fixtures

Updated today

Run a read-only claim-or-close sweep. The core rule is conservative: uncertainty always KEEP. Idle state, TASK_DONE, a title, or cost data never proves that a pane is done.

Run

bash skills/golem-powers/pane-liveness-check/scripts/run.sh
bash skills/golem-powers/pane-liveness-check/scripts/run.sh --json

The runner uses cmux/cmuxlayer reads and Git status/upstream reads. It never closes, kills, sends to, retitles, checks out, fetches, resets, or cleans a worktree.

Safety Contract

Enumerate with cmuxlayer list_surfaces and verbose:true; stable UUID is each surface's id.
Key every row by UUID. Treat surface:N as display-only.
Immediately before each parsed read, re-list and compare UUID. Accept screen evidence only with an atomic cmux read-screen --id-format both receipt for the expected UUID. Re-list afterward.
Any mismatch means STALE-REF — re-enumerate, verdict: null, and no disposition.
Set an owner only from explicit metadata (seat_lane, parent_agent_id, Owner lane: @name, or (@name)); otherwise use owner=UNKNOWN.

Verdicts

Evidence	Verdict
Uncommitted files or unpushed commits	`KEEP-unpushed`
Verified dead process	`DEAD-shell`
Live worker still booting, thinking, or working	`KEEP-live`
Open/owed/unknown lane or incomplete proof	`KEEP-blocked`
Closed lane, harvested/reported worker, clean pushed artifact	`CLOSE-CANDIDATE`
UUID mismatch	No disposition: `STALE-REF`

Report DONE only when all three are true: no open lane, no live worker is unharvested or unreported, and no work is unpushed. Flag launcher-only titles such as <repo>Claude [surface:N] as untitled.

Full SKILL.md source — includes LLM directives, anti-patterns, and technical instructions stripped from the Overview tab.

Run a read-only claim-or-close sweep. The core rule is conservative: uncertainty always KEEP. Idle state, TASK_DONE, a title, or cost data never proves that a pane is done.

Run

bash skills/golem-powers/pane-liveness-check/scripts/run.sh
bash skills/golem-powers/pane-liveness-check/scripts/run.sh --json

The runner uses cmux/cmuxlayer reads and Git status/upstream reads. It never closes, kills, sends to, retitles, checks out, fetches, resets, or cleans a worktree.

Safety Contract

Enumerate with cmuxlayer list_surfaces and verbose:true; stable UUID is each surface's id.
Key every row by UUID. Treat surface:N as display-only.
Immediately before each parsed read, re-list and compare UUID. Accept screen evidence only with an atomic cmux read-screen --id-format both receipt for the expected UUID. Re-list afterward.
Any mismatch means STALE-REF — re-enumerate, verdict: null, and no disposition.
Set an owner only from explicit metadata (seat_lane, parent_agent_id, Owner lane: @name, or (@name)); otherwise use owner=UNKNOWN.

Verdicts

Evidence	Verdict
Uncommitted files or unpushed commits	`KEEP-unpushed`
Verified dead process	`DEAD-shell`
Live worker still booting, thinking, or working	`KEEP-live`
Open/owed/unknown lane or incomplete proof	`KEEP-blocked`
Closed lane, harvested/reported worker, clean pushed artifact	`CLOSE-CANDIDATE`
UUID mismatch	No disposition: `STALE-REF`

Report DONE only when all three are true: no open lane, no live worker is unharvested or unreported, and no work is unpushed. Flag launcher-only titles such as <repo>Claude [surface:N] as untitled.

NOT for

Automatically closing, killing, messaging, or retitling panes.
Worktree mutation or garbage collection.
Billing analysis or worker shaming; output omits cost entirely.

Common Mistakes

Treating idle, TASK_DONE, or an old title as completion proof.
Inferring ownership from a repository-like title.
Reusing a numeric surface ref after pane re-enumeration.
Declaring DONE while a live worker, open lane, dirty tree, or unpushed commit remains.

Evaluation

2026-08-03: naive baseline 2/18 (11.1%); deterministic sweep 18/18 (100%), +88.9 percentage points.

Best Pass Rate

94%

Opus 4.6

Assertions

3 models tested

Avg Cost / Run

$0.2511

across models

Fastest (p50)

1.8s

Haiku 4.5

Behavior Evals

Phase 2 baseline — skill quality on Claude

Behavior Baseline

Opus 4.6

94%17/18

●

Haiku 4.5

83%15/18

◒

Sonnet 4.6

78%14/18

◒

Assertion	Opus 4.6	Sonnet 4.6	Haiku 4.5	Consensus
keep-blocked				3/3
no-close				2/3
reason-names-open-lane				2/3
keep-unpushed				3/3
task-done-not-proof				3/3
reason-names-uncommitted				3/3
dead-shell				2/3
title-not-liveness				3/3
process-field				3/3
keep-unpushed				3/3
no-close				2/3
commit-count				3/3
stale-ref				3/3
no-disposition				2/3
verbose-list				3/3
close-candidate				1/3
no-cost				3/3
uuid-key				2/3

Token Usage

Opus 4.6

15,850

Sonnet 4.6

9,588

Haiku 4.5

4,078

Input tokensOutput tokens

Cost per Run

Opus 4.6

$0.6558

Sonnet 4.6

$0.0950

Haiku 4.5

$0.0026

Model	Input Tokens	Output Tokens	Cost / Run	Cost / 1K Runs
Opus 4.6	8,883	6,967	$0.6558	$655.80
Sonnet 4.6	4,069	5,519	$0.0950	$95.00
Haiku 4.5	2,503	1,575	$0.0026	$2.60

Model	p50	p95	Overhead
Opus 4.6	3.0s	5.9s	+97%
Sonnet 4.6	3.0s	5.8s	+96%
Haiku 4.5	1.8s	2.6s	+47%

Last evaluated: 2026-03-12 · Data is generated from skill assertions (real cross-model benchmarks coming soon)

Quick Install

golems-cli skills install pane-liveness-check

Or paste into Claude Code:

Install and configure the pane-liveness-check skill for Claude Code.
Download from github.com/EtanHey/golems/tree/master/skills/golem-powers/pane-liveness-check
and symlink to ~/.claude/commands/pane-liveness-check/. If ~/.golems/config.yaml
doesn't exist, run the setup wizard first. Then follow the First-Time
Setup section in the SKILL.md.

Category: Other
Evals: 6
Assertions: 18 passing
Fixtures: Included
Updated: today

View source on GitHub