Record the 2026-08-22 adversarial-mutation-test run

[thedavidmeister]

The org health dashboard reports no mutation run for this repo. It reads audit/mutation-test-scans.json, and no commit in this repo's history has ever touched that file. A whole-repo adversarial-mutation-test campaign did run on 2026-08-22: it filed 74 issues (#150–#230, labels audit + adversarial, 18:00–23:16 UTC) and merged eight coverage PRs (#202, #185, #193, #183, #224, #197, #152, then #237 as round 2). It closed without landing its record. This PR writes that record from what the run left behind.

Every field is sourced; nothing is estimated:

field	value	source
timestamp	2026-08-22T23:16:32Z	createdAt of the last issue the run filed (#230)
commit	1dc3bd97…	main at 17:56 UTC, the last commit before the first issue (18:00)
testsAfterCommit	45ca96c0…	merge commit of #237, the last coverage PR
publishedTag / commitsAheadOfTag	sol-v0.1.7 / 3	nearest tag reachable from commit
skillVersion	0.34.0	the skill's SKILL.md in the rainlanguage-skills marketplace at 2026-08-22 (unchanged since 2026-08-16)
summary.filed	the 74 issue numbers	gh issue list --label adversarial, created 2026-08-22
summary.testsBefore / testsAfter	159 / 359	cargo test --workspace + forge test totals on each tree: 137+22 and 337+22

behaviours and confirmed are omitted rather than guessed; the run recorded neither. reconstructed and recordedAt say when and how this entry was written, so it is never mistaken for the run's own output.

QA

• jq parses the file; one entry, 74 filed numbers, first #150, last #230.
• The health check's parse_mutation_scans picks the newest entry by timestamp and needs timestamp, commit, scope, tool, skillVersion; all present, extra keys are ignored by that parser (its summary sub-shape is documented as deliberately unparsed).
• Test counts measured, not copied: both trees checked out and run today (cargo test --workspace result lines summed; forge test summary line), 0 failures on either.
• Discriminating tests: n/a, a data file; the discriminator is the dashboard's lastMutation, null on main today and this entry after the next scan.
• Mutations applied: n/a, no code.
• Oracle: the repo's own issues and PRs, git for the commits and tag, the skill's README template for the field set.
• Category check: the ask is to fix the record, not rerun the campaign. This adds the record and nothing else.

🤖 Generated with Claude Code

https://claude.ai/code/session_01EyWWorieTJV9FmMm2JM6Ua

Summary by CodeRabbit

• Documentation
  • Added an audit record documenting an adversarial mutation-test run.
  • Included run metadata, test counts before and after the run, identified issues, and related coverage updates.
  • Recorded the published version, analysis scope, tooling details, and reconstruction notes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Team

Run ID: e9754c4f-a62f-4821-86c8-1ac7a4e7de23

📥 Commits

Reviewing files that changed from the base of the PR and between 7c06dfb and 8f621fa.

📒 Files selected for processing (1)

• audit/mutation-test-scans.json

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

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Walkthrough

The pull request adds a JSON audit record for an adversarial mutation-test run. The record includes run metadata, reconstruction notes, candidate and test counts, filed issue numbers, and coverage pull request numbers.

Changes

Mutation test audit

Layer / File(s)	Summary
Record mutation-test results audit/mutation-test-scans.json	Adds metadata for the run, reconstruction notes, 74 mutation candidates, test counts before and after the run, 74 filed issues, and 8 coverage pull requests.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk: ⚪ Minimal · up to 8f621

This adds a reconstructed mutation-test campaign audit record without changing runtime behavior. The recorded metadata and counts are consistent with the supplied validation, so it is ready to merge.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely identifies the main change: recording the 2026-08-22 adversarial-mutation-test run.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch 2026-09-03-mutation-scan-record

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[github-actions]

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