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ci: exercise changelog-monotonic with a real containment run

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The action-exercise job commits a scratch base, marks it as an in-job
fixture branch, commits an insert-above edit, and runs the composite
action against that history — proving the wiring AND a genuine
merge-base comparison, not just an action.yml parse. Base ref passed
explicitly: the shallow PR checkout has no origin/main to resolve.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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claude-bot-andresmgsl 2026-07-22 21:12:44 +00:00
parent 7424ef21bf
commit a0bea573a1
1 changed files with 24 additions and 0 deletions
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24
.github/workflows/ci.yml vendored
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@ -56,3 +56,27 @@ jobs:
- uses: ./actions/changelog-armed
with:
changelog: CHANGELOG.scratch.md
- name: Construct a scratch history for the monotonic guard
# The monotonic guard's input is a DIFF, so its exercise needs
# history, not just a file: commit a scratch changelog, mark that
# commit as the fixture base, then commit an insert-above edit on
# top — a real containment run, not just an action.yml parse. The
# base ref is the in-job branch, passed explicitly, because this
# job's shallow PR checkout carries no origin/main for the input's
# default to resolve (consumers get that via fetch-depth: 0, per
# the action's description). Scratch-named file for the same
# shadowing reason as above; the commits live only in this job's
# checkout and are never pushed.
run: |
git config user.name ceremony-ci
git config user.email ceremony-ci@users.noreply.github.com
printf '# Changelog\n\n## Unreleased\n\n## 0.1.0 — 2026-07-01\n\n- Shipped entry.\n' > CHANGELOG.monotonic.scratch.md
git add CHANGELOG.monotonic.scratch.md
git commit -m 'fixture: monotonic base'
git branch monotonic-fixture-base
printf '# Changelog\n\n## Unreleased\n\n- Entry inserted above.\n\n## 0.1.0 — 2026-07-01\n\n- Shipped entry.\n' > CHANGELOG.monotonic.scratch.md
git commit -am 'fixture: insert above'
- uses: ./actions/changelog-monotonic
with:
changelog: CHANGELOG.monotonic.scratch.md
base-ref: monotonic-fixture-base