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fix(#3962): rename the TDD-Audit trailer token to gate-status (#4174)

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* test(#3962): shipped TDD-Audit trailer token must round-trip through git

Behavioral coverage: extract the trailers:key token from ship.md and
prove a real git commit carrying that trailer reads back via
%(trailers:key=token,valueonly). gate_status contains an underscore,
which git's trailer machinery cannot tokenize, so the audit read was
structurally empty.

* fix(#3962): rename the TDD-Audit trailer token to gate-status

Underscore is not a valid git trailer token character, so
%(trailers:key=gate_status,...) could never match. Renames the token
at the read, the documented aggregate write, and the section's
prose/table header. Self-suppression semantics (#2431) unchanged.

* test(#3962): compare outcome against the seam's literal, fix doc token

Review follow-ups: the round-trip test compared outcome to 'EXITED'
but the process seam emits 'exited'; and the trailer rename is
propagated to docs/ship-pr-body-sections.md's read/write examples.

* chore(#3962): backfill changeset pr number

---------

Co-authored-by: sim <sim@local>
This commit is contained in:
Tom Boucher
2026-09-02 00:01:55 -04:00
committed by GitHub
parent 10593e2cf2
commit 7960374d15
4 changed files with 59 additions and 27 deletions
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docs/ship-pr-body-sections.md
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@@ -19,12 +19,12 @@ Custom sections are append-only. They render after `Key Decisions` (and before t
### TDD Audit section
The `TDD Audit` section is always appended last. It walks the commits in the `merge-base..HEAD` range (merges excluded), reads each commit's `gate_status:` Git trailer (`skill` | `fallback` | `exempt`), and pairs each `test:` commit with its following `feat:`/`fix:` implementation commit in a table. Commits that carry no recognized trailer are counted as `missing`.
The `TDD Audit` section is always appended last. It walks the commits in the `merge-base..HEAD` range (merges excluded), reads each commit's `gate-status:` Git trailer (`skill` | `fallback` | `exempt`), and pairs each `test:` commit with its following `feat:`/`fix:` implementation commit in a table. Commits that carry no recognized trailer are counted as `missing`.
The section closes with a single aggregate trailer line that a GitHub squash-merge carries into the base branch:
```
gate_status: skill=3, fallback=1, exempt=0, missing=0
gate-status: skill=3, fallback=1, exempt=0, missing=0
```
## Configure Sections During Onboarding