fix(repo): anchor the config.yaml ignore rule to the repository root

[Nitjsefnie]

Description

The root .gitignore carried a bare config.yaml rule. A gitignore pattern with no slash in it is unanchored and matches at any depth, so it also swallowed example configs under examples/ that are meant to be committed — git add exits 0 and stages nothing, with no warning. This anchors the rule to the repository root (/config.yaml), which keeps the developer-secret protection exactly where it was intended and stops it reaching nested paths.

.gitignore is the only file changed.

Why anchoring rather than a negation. #248 offered both /config.yaml and a !examples/**/config.yaml negation. Anchoring is the narrower and more predictable of the two: it fixes every directory at once rather than carving out one, and it cannot be defeated by a parent-directory exclusion the way a negation can. Happy to switch to the negation form if you would rather keep the rule broad — your call.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Test update
• CI/CD update

Related Issues

Closes #248

How Has This Been Tested?

Both halves were checked, because the second is what proves the protection was not simply deleted.

Before, on a clean checkout of main:

$ git check-ignore -v examples/demo/config.yaml
.gitignore:240:config.yaml	examples/demo/config.yaml
$ git check-ignore -v config.yaml
.gitignore:240:config.yaml	config.yaml

After:

$ git check-ignore -v examples/demo/config.yaml
(exit 1 — no longer ignored)
$ git check-ignore -v config.yaml
.gitignore:240:/config.yaml	config.yaml

Full suite, single process, as the Coverage job runs it (uv run --no-sync pytest --cov=openagent_eval --cov-report=term-missing --cov-fail-under=75):

=========== 1066 passed, 4 skipped, 10 warnings in 153.17s (0:02:33) ===========
Required test coverage of 75% reached. Total coverage: 81.08%

Identical to the base, as expected for a .gitignore-only change.

• Unit tests pass (uv run pytest)
• Linter passes (uv run ruff check .) — not ticked: ruff check . exits non-zero on pre-existing findings at main itself, so this box cannot be honestly ticked on any PR here. This change touches no Python and adds no findings.
• Type checker passes (uv run mypy openagent_eval/) — not ticked, same reason; also unaffected by a .gitignore change.
• Manual testing performed

Checklist

• My code follows the project's coding standards
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas — n/a, the existing comment above the rule still describes it correctly
• I have made corresponding changes to the documentation — n/a, no documented behaviour changes
• My changes generate no new warnings
• I have added tests that prove my fix is effective — not ticked: gitignore matching is not reachable from the Python test suite. The git check-ignore -v transcripts above are the evidence, in both directions.
• New and existing unit tests pass locally with my changes

Additional Notes

Bug discovered while doing this work, filed separately:

• [BUG] The remaining unanchored config.*.yaml rule in .gitignore silently excludes example configs #264 [BUG] The remaining unanchored config.*.yaml rule in .gitignore silently excludes example configs

That one is the same defect on .gitignore:242, which this PR deliberately leaves alone so it closes #248 exactly as written. Two details worth having from that investigation: config.*.yaml on line 242 already subsumes config.groq.yaml on line 241 (git reports 242 as the matching rule, so 241 never fires), and line 242 does not cover line 240, because the * sits between two dots and cannot match an empty middle. Say the word and I will fold the anchoring of line 242 into this PR instead of a second one.

Generated by Claude Opus 5 (brief, review), Kimi K2.7 Code (implementation)

[github-actions]

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