[rig-sampler] Daily Rig sample report — 2026-10-20

Start with skills/rig/samples/159-ts-branch-coverage.md, the sample that failed. Trace its root agent input configuration and compare it with the successful samples listed in this report. Reproduce the reported stdin validation error; done means the sample runs without that error and produces its expected output.

Selected samples

• skills/rig/samples/144-dep-license-auditor.md — ✅ succeeded
• skills/rig/samples/410-merge-strategy-selector.md — ✅ succeeded
• skills/rig/samples/289-markdown-heading-validator.md — ✅ succeeded
• skills/rig/samples/159-ts-branch-coverage.md — ❌ failed
• skills/rig/samples/460-yaml-anchor-alias-reporter.md — ✅ succeeded

{"packages":[{"name":"@anthropic-ai/sdk","license":"MIT","category":"permissive"},{"name":"@deepseek-ai/dsh-sdk-client","license":"MIT","category":"permissive"},{"name":"@earendil-works/pi-agent-core","license":"MIT","category":"permissive"},{"name":"@earendil-works/pi-ai","license":"MIT","category":"permissive"},{"name":"@emnapi/runtime","license":"MIT","category":"permissive"},{"name":"@github/copilot-sdk","license":"MIT","category":"permissive"},{"name":"@img/sharp-wasm32","license":"Apache-2.0 AND LGPL-3.0-or-later AND MIT","category":"copyleft"},{"name":"@openai/codex-sdk","license":"Apache-2.0","category":"permissive"},{"name":"@types/node","license":"MIT","category":"permissive"},{"name":"postcss","license":"MIT","category":"permissive"},{"name":"source-map-js","license":"MIT","category":"permissive"},{"name":"typescript","license":"Apache-2.0","category":"permissive"},{"name":"vitest","license":"MIT","category":"permissive"},{"name":"zx","license":"Apache-2.0","category":"permissive"}],"hasCopyleft":true,"totalPackages":14}

{"mergeRecommendation":"fast-forward","rationale":"The branch diff contains no changed files and there are no conflicts. A fast-forward merge is the cleanest option because there is nothing to combine, squash, or rebase, and it adds no merge commit. If the branch has no unique commits, the merge is a no-op.","totalChangedFiles":0}

{".agents/skills/rig/SKILL.md":{"headings":[{"level":1,"text":"rig"},{"level":2,"text":"Canonical program"},{"level":2,"text":"Construction rules"},{"level":2,"text":"High-frequency decisions"},{"level":2,"text":"Composition invariants"},{"level":2,"text":"Runnable output"},{"level":2,"text":"Final check"},{"level":2,"text":"Focused references"}],"maxDepth":2,"isValid":true,"issues":[]}}

(no stdout output)
stderr: Expected stdin program root agent to have no input (omit input or use input: s.object({})).

{"files":{".github/workflows/mattpocock-skills-reviewer.lock.yml":{"anchorCount":6,"aliasCount":172,"anchors":["1","2","2","2","2","1"]},".github/workflows/copilot-setup-steps.yml":{"anchorCount":0,"aliasCount":0,"anchors":[]},".github/workflows/rig-skill-integration.lock.yml":{"anchorCount":6,"aliasCount":168,"anchors":["1","2","2","2","2","1"]},".github/workflows/create-release.lock.yml":{"anchorCount":3,"aliasCount":88,"anchors":["1","2","2"]},".github/workflows/monthly-pr-clusters.lock.yml":{"anchorCount":6,"aliasCount":169,"anchors":["1","2","2","2","2","1"]},".github/workflows/daily-rig-file-summarizer.lock.yml":{"anchorCount":6,"aliasCount":168,"anchors":["1","2","2","2","2","1"]},".github/workflows/agentics-maintenance.yml":{"anchorCount":0,"aliasCount":0,"anchors":[]},".github/workflows/daily-rig-claude-compat.lock.yml":{"anchorCount":6,"aliasCount":168,"anchors":["1","2","2","2","2","1"]},".github/workflows/daily-rig-header.lock.yml":{"anchorCount":6,"aliasCount":168,"anchors":["1","2","2","2","2","1"]},".github/workflows/daily-rig-task-generator.lock.yml":{"anchorCount":6,"aliasCount":187,"anchors":["1","2","2","2","2","1"]},".github/workflows/agentic_commands.yml":{"anchorCount":0,"aliasCount":0,"anchors":[]},".github/workflows/daily-rig-decomposition-bench.lock.yml":{"anchorCount":6,"aliasCount":168,"anchors":["1","2","2","2","2","1"]},".github/workflows/rig-eslint-rule-miner.lock.yml":{"anchorCount":6,"aliasCount":168,"anchors":["1","2","2","2","2","1"]},".githu... [truncated]

Rig Runtime Logs

Captured from stderr of the single run of the program (RIG_DEBUG enabled), plus each sample's inner-program stderr. Lines are verbatim.

Coordinator (outer program)

{"type":"rig.agent:invoke","data":{"agent":"sample-coordinator","input":"","model":"small","maxTurns":4},"created_at":1792513459854,"timestamp":134.830271}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513459855,"timestamp":135.171244}
{"type":"rig.agent:close","data":{"agent":"sample-coordinator"},"created_at":1792513583869,"timestamp":124148.701202}
{"type":"rig.engine:copilot:close","created_at":1792513583869,"timestamp":124148.749458}

skills/rig/samples/144-dep-license-auditor.md

Outer:

{"type":"rig.agent:invoke","data":{"agent":"sample-runner","input":{"path":"skills/rig/samples/144-dep-license-auditor.md"},"model":"small","maxTurns":4},"created_at":1792513461880,"timestamp":2159.521127}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513461880,"timestamp":2159.591669}
{"type":"rig.agent:close","data":{"agent":"sample-runner"},"created_at":1792513482798,"timestamp":23077.869913}
{"type":"rig.engine:copilot:close","created_at":1792513482798,"timestamp":23077.991637}

Inner:

{"type":"rig.agent:invoke","data":{"agent":"agent","input":"","model":"small","maxTurns":4},"created_at":1792513465011,"timestamp":132.114852}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513465012,"timestamp":132.673434}
{"type":"rig.agent:close","data":{"agent":"agent"},"created_at":1792513477004,"timestamp":12124.970027}
{"type":"rig.engine:copilot:close","created_at":1792513477004,"timestamp":12125.089825}

skills/rig/samples/410-merge-strategy-selector.md

Outer:

{"type":"rig.agent:invoke","data":{"agent":"sample-runner","input":{"path":"skills/rig/samples/410-merge-strategy-selector.md"},"model":"small","maxTurns":4},"created_at":1792513482835,"timestamp":23115.172654}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513482835,"timestamp":23115.251703}
{"type":"rig.agent:close","data":{"agent":"sample-runner"},"created_at":1792513502139,"timestamp":42418.460964}
{"type":"rig.engine:copilot:close","created_at":1792513502139,"timestamp":42418.57634}

Inner:

{"type":"rig.agent:invoke","data":{"agent":"agent","input":"diff","model":"small","maxTurns":4},"created_at":1792513485177,"timestamp":143.280181}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513485178,"timestamp":143.849522}
{"type":"rig.agent:close","data":{"agent":"agent"},"created_at":1792513490816,"timestamp":5782.07675}
{"type":"rig.engine:copilot:close","created_at":1792513490816,"timestamp":5782.230969}
{"type":"rig.agent:invoke","data":{"agent":"agent","input":"conflict","model":"small","maxTurns":4},"created_at":1792513490849,"timestamp":5815.189198}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513490849,"timestamp":5815.340892}
{"type":"rig.agent:close","data":{"agent":"agent"},"created_at":1792513494276,"timestamp":9242.603516}
{"type":"rig.engine:copilot:close","created_at":1792513494277,"timestamp":9242.666106}
{"type":"rig.agent:invoke","data":{"agent":"workflow-json","input":"","model":"small","maxTurns":4},"created_at":1792513494306,"timestamp":9272.300174}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513494306,"timestamp":9272.544664}
{"type":"rig.agent:close","data":{"agent":"workflow-json"},"created_at":1792513496517,"timestamp":11482.621835}
{"type":"rig.engine:copilot:close","created_at":1792513496517,"timestamp":11482.669325}

skills/rig/samples/289-markdown-heading-validator.md

Outer:

{"type":"rig.agent:invoke","data":{"agent":"sample-runner","input":{"path":"skills/rig/samples/289-markdown-heading-validator.md"},"model":"small","maxTurns":4},"created_at":1792513502182,"timestamp":42461.954658}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513502182,"timestamp":42462.010256}
{"type":"rig.agent:close","data":{"agent":"sample-runner"},"created_at":1792513524920,"timestamp":65199.917474}
{"type":"rig.engine:copilot:close","created_at":1792513524920,"timestamp":65199.964115}

Inner:

{"type":"rig.agent:invoke","data":{"agent":"agent","input":"","model":"small","maxTurns":4},"created_at":1792513504128,"timestamp":132.357614}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513504129,"timestamp":132.990174}
{"type":"rig.agent:close","data":{"agent":"agent"},"created_at":1792513521160,"timestamp":17163.656562}
{"type":"rig.engine:copilot:close","created_at":1792513521160,"timestamp":17163.801558}

skills/rig/samples/159-ts-branch-coverage.md

Outer:

{"type":"rig.agent:invoke","data":{"agent":"sample-runner","input":{"path":"skills/rig/samples/159-ts-branch-coverage.md"},"model":"small","maxTurns":4},"created_at":1792513524955,"timestamp":65234.756357}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513524955,"timestamp":65234.812281}
{"type":"rig.agent:close","data":{"agent":"sample-runner"},"created_at":1792513528997,"timestamp":69277.149665}
{"type":"rig.engine:copilot:close","created_at":1792513528997,"timestamp":69277.194844}

Inner: no rig.* runtime log lines were available (the inner program failed before any agent ran). Only stderr was:

Expected stdin program root agent to have no input (omit input or use input: s.object({})).

skills/rig/samples/460-yaml-anchor-alias-reporter.md

Outer:

{"type":"rig.agent:invoke","data":{"agent":"sample-runner","input":{"path":"skills/rig/samples/460-yaml-anchor-alias-reporter.md"},"model":"small","maxTurns":4},"created_at":1792513529032,"timestamp":69311.951096}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513529032,"timestamp":69312.002678}
{"type":"rig.agent:close","data":{"agent":"sample-runner"},"created_at":1792513561651,"timestamp":101931.293194}
{"type":"rig.engine:copilot:close","created_at":1792513561652,"timestamp":101931.35101}

Inner:

{"type":"rig.agent:invoke","data":{"agent":"agent","input":"","model":"small","maxTurns":4},"created_at":1792513531835,"timestamp":139.129385}
{"type":"rig.engine:copilot:create","data":{"model":"small","transport":"stdio"},"created_at":1792513531837,"timestamp":139.705739}
{"type":"rig.agent:close","data":{"agent":"agent"},"created_at":1792513552038,"timestamp":20340.968227}
{"type":"rig.engine:copilot:close","created_at":1792513552038,"timestamp":20341.087682}

Generated by Daily Rig Sample Report · copilot · auto · 122.4 AIC · ⌖ 0.662 AIC · ⊞ 8.8K · ◷

• expires on Oct 27, 2026, 4:28 PM UTC