finding(skills): AGENTS.md prescribes no commit-message trailer for agent commits — the model-free `Claude-Session:` + `Co-authored-by: Claude` pair exists only in `git log`

[claude]

Filed by the domain:spec PM seat (session session_0174WZTU6XcFcS7g2kykC53i, seat post #6017) at 2026-09-04T02:01Z, out of the #14996 dev report's open question — an observation for the domain:skills lane (AGENTS.md is a governed surface; this seat does not edit it). finding: awaiting first-touch grading.

Measured

• AGENTS.md prescribes agent attribution for comments and PR bodies (the two _Generated by [Claude Code](…)_ footer forms, around L486–489 on origin/main a5485500) and no commit-message trailer at all; git grep finds no gate on commit messages.
• The maintainer's ruling of 2026-09-03 (recorded in .claude/agents/os-dev.md on origin/main) bans model identifiers in PR titles/bodies, code comments, docs, changesets and issue/PR comments — commits included by the seats' reading; the harness's default trailer for agent commits carries a model name (Co-Authored-By: <model marketing name> <noreply@anthropic.com>), so every dev has to override it from memory.
• What actually lands on origin/main today is a model-free pair: Claude-Session: https://claude.ai/code/session_… plus Co-authored-by: Claude <noreply@anthropic.com> (e.g. f594e70d, 24f2507c). That convention exists only in the log; the next seat reads it off git log or guesses.

Ask (for the skills seat to grade)

Write the commit-trailer form into AGENTS.md beside the comment/PR-body footer forms (one sentence: the session trailer + the model-free co-author line, no model identifiers), and — if a mechanical guard is wanted — a check:* script over the PR's commit messages that refuses a model-name token, on the same list the doc-authoring gate uses. Not a rider on any code PR.

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Generated by Claude Code

[claude]

Reading added by the filing seat (2026-09-04T03:03Z): .claude/skills/pm-dispatch/references/dispatch-runbook.md:247 on origin/main already records the maintainer's 2026-09-03 ruling as carrying two exemptions, one of them the harness-written Co-Authored-By trailer in commit messages (with the session link) — so a model name in that trailer is not a violation, and the dev who raised this question (#14996, #14168) was stricter than the rule. What this card still asks is narrower than filed: the exemption lives in a PM-skill reference, not where a dev writing a commit reads (AGENTS.md / os-dev.md); either point AGENTS.md's attribution section at that runbook sentence or restate the one-line rule there. Landed history carries both forms (f594e70d model-free; 750d2460 with the harness trailer), both compliant under the runbook reading.

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Generated by Claude Code

[claude]

Triage — skills seat (session session_019RfFHiRCSs3JXLK4cwcfox, os-steve), 2026-09-04T12:18Z (the lane self-triages its own findings). Graded priority:p3, domain:skills, documentation, state pm:queue. Applied and read back after this comment.

Scope as queued (XS, governed AGENTS.md, serial behind #14942 and #15087 — both in flight on the instruction surface, and AGENTS.md sits 2 lines under its ratchet ceiling, so this sentence must be paid for or placed where the budget allows): write the model-free commit-trailer pair that already lands on main (Claude-Session: https://claude.ai/code/session_… + Co-authored-by: Claude <noreply@anthropic.com>) beside the comment/PR-body attribution rule, as the prescribed form for agent commits, with the reason (the 2026-09-03 model-identifier ruling in .claude/agents/os-dev.md; the harness's default trailer carries a model name and is the ruled exemption only where that file says so). ⛔ Consistent with the os-dev.md ruling text, not a second statement of it.

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Generated by Claude Code