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ci-formats-reviewer

Testing & Quality
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Reviews SARIF, CodeClimate, Compact, Markdown, and Badge output formats for spec compliance and CI integration correctness. Use when reviewing changes to fallow's CI-oriented output formats.

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Source SKILL.md: https://github.com/fallow-rs/fallow/blob/HEAD/.agents/skills/ci-formats-reviewer/SKILL.md

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Review changes to fallow's CI-oriented output formats. Each format serves a specific integration and must comply with its specification.

Formats and their specs

SARIF (sarif.rs)

  • Must comply with SARIF 2.1.0 (OASIS standard)
  • Every rule needs: id, shortDescription, helpUri
  • Results must include physicalLocation with artifactLocation (relative URI) and region (startLine, startColumn)
  • level mapping: fallow error -> SARIF "error", fallow warn -> SARIF "warning"
  • Used by: GitHub Advanced Security (code scanning), VS Code SARIF Viewer
  • Verify $schema URI, version field, tool.driver metadata

CodeClimate (codeclimate.rs)

  • Must comply with GitLab Code Quality specification
  • JSON array of issue objects (not wrapped in an envelope)
  • Required fields: type, check_name, description, categories, severity, fingerprint, location
  • Fingerprint must be deterministic (FNV-1a hash from rule_id + identifier)
  • Severity mapping: Error -> "major", Warn -> "minor"
  • Categories: "Bug Risk" (dead code), "Duplication", "Complexity"
  • Used by: GitLab CI inline MR annotations

Compact (compact.rs)

  • One issue per line, grep-friendly
  • Format: issue-type:path:line:name
  • Must be parseable by shell scripts (no special characters in delimiters)
  • Deterministic ordering

Markdown (markdown.rs)

  • GitHub/GitLab-compatible markdown
  • Collapsible <details> sections for large output
  • Relative paths with backtick escaping
  • Used by: PR comments (action/ and ci/ scripts consume this)

Badge (badge.rs)

  • Shields.io flat SVG format
  • Must be valid SVG that renders in browsers and GitHub README
  • Letter grade (A-F) with correct color mapping
  • Self-contained (no external font references)

What to check

  1. Spec compliance: Does the output validate against the official schema?
  2. Determinism: Same input produces identical output across runs
  3. Severity mapping: Consistent translation from fallow severity to format-specific severity
  4. Path handling: All paths relative, no platform-specific separators in output
  5. Integration testing: Do consumers (GitHub/GitLab scripts, remaining summary/annotation jq, typed PR/MR renderers) still parse the output correctly after changes?

Surface-specific checks (Phase 3 audits)

For each CI-format diff, run the format-specific audit alongside the generic checks above.

Compact format audit (Phase 3c)

FALLOW_QUIET=1 fallow <command> --format compact --root benchmarks/fixtures/real-world/zod 2>/dev/null

Check:

  • One line per item, parseable by grep/awk
  • Colon-separated fields, consistent with existing compact output

Markdown format audit (Phase 3d)

FALLOW_QUIET=1 fallow <command> --format markdown --root benchmarks/fixtures/real-world/zod 2>/dev/null

Check:

  • Valid GFM (GitHub-Flavored Markdown)
  • Tables have header + separator + rows
  • Summary line present

SARIF format audit (Phase 3e)

FALLOW_QUIET=1 fallow <command> --format sarif --root benchmarks/fixtures/real-world/zod 2>/dev/null | jq -r '.version'

Check:

  • Valid SARIF 2.1.0
  • If feature doesn't apply to SARIF (e.g., metric scores), verify it's intentionally omitted with a code comment

CodeClimate format audit (Phase 3f)

FALLOW_QUIET=1 fallow <command> --format codeclimate --root benchmarks/fixtures/real-world/zod 2>/dev/null | jq 'length as $count | "\($count) issues", (if length > 0 then .[0] else "empty" end)'

Check:

  • Valid CodeClimate JSON array (GitLab Code Quality compatible)
  • Each issue has: type, check_name, description, categories, severity, fingerprint, location
  • Severity mapping correct: error to major, warn to minor, complexity graduated (minor/major/critical)
  • Fingerprints deterministic (run twice, compare)
  • Paths are relative with forward slashes

Key files

  • crates/cli/src/report/sarif.rs
  • crates/cli/src/report/codeclimate.rs
  • crates/cli/src/report/compact.rs
  • crates/cli/src/report/markdown.rs
  • crates/cli/src/report/badge.rs

Veto rights

Can BLOCK on:

  • SARIF output that violates the 2.1.0 schema
  • CodeClimate output missing required fields (fingerprint, severity, location)
  • Non-deterministic fingerprints
  • Absolute paths in any CI format output

Output format

End with a verdict:

## Verdict: APPROVE | CONCERN | BLOCK

What NOT to flag

  • Human output or JSON output (different reviewers)
  • SVG visual aesthetics beyond correctness