Conciseness

The body is dense and project-specific (e.g. "The log: ~/Library/Logs/ClaudeBar/ClaudeBar.log", "tuist test Providers"), but the ~27-line ASCII box diagram merely restates the three phase headings that follow it, and the "Domain Invariants" section is a comment-only Swift block ("// Example: QuotaMonitor should maintain selection invariants") with no content. This is more trimmable material than the "minor instances" of anchor 4, but far from the padding of anchor 2.

Actionability

Mostly copy-paste ready: a complete Swift test template with a real fixture (stub.answerRPC feeding a captured rateLimits response), exact commands ("xcodebuild test -workspace ClaudeBar.xcworkspace -scheme ClaudeBar-Workspace -destination 'platform=macOS,arch=arm64'"), specific fields ("account.lastFailedStep"), and named test modules. Not a 5 because the Domain Invariants block and the "Domain Design Principles" block are comment-only pseudo-structure offering no executable guidance — minor gaps against anchor 5's "fully executable".

Workflow Clarity

A clear three-phase Red/Green sequence ("Reproduce & Understand" → "Write Failing Test (Red)" → "Fix & Verify (Green)") with explicit validation checkpoints at every phase: "Test should FAIL before fix", "Test now PASSES", "All existing tests still pass", the full xcodebuild run, and a closing checklist. This matches anchor 5's explicit validation steps plus checklist; anchor 4 would require some implicit checkpoint, which is not the case here.

Progressive Disclosure

Well-signaled, one-level-deep references throughout ("[Naming tests](../implement-feature/references/tdd-patterns.md#naming-tests)", "[MODULAR_DESIGN.md](../../../docs/architecture/MODULAR_DESIGN.md)", "[domain-shape.md](../implement-feature/references/domain-shape.md)"), and the core workflow is appropriately kept inline. Not a 5: the skill ships no bundle of its own and leans on a sibling skill's reference files and repo docs for core material, and the inlined ASCII diagram duplicates what headers already say — minor organization gaps per anchor 4.

Specificity

It names the domain and essentially one concrete action — "Guide for fixing bugs in ClaudeBar following Chicago School TDD and rich domain design" — with the remaining clauses ("Fixing a defect", "Correcting behavior") restating that same action. Anchor 3 ("names domain and 1-2 concrete actions, but not comprehensive") fits; anchor 4 requires several distinct listed actions, which this does not have.

Completeness

Explicitly answers both parts: the "what" ("Guide for fixing bugs in ClaudeBar following Chicago School TDD and rich domain design") and a dedicated "Use this skill when:" clause enumerating four concrete trigger situations with quoted user phrasing. This is a direct match for anchor 5; anchor 4's weaker "when" does not apply.

Trigger Term Quality

Good natural coverage including direct user quotes ("fix this bug", "this doesn't work correctly") and phrases like "reports a bug", "unexpected behavior", "violates the user's mental model". Not a 5: common variations users actually say — "broken", "crash", "error", "regression" — are missing, which is exactly anchor 4's "a few natural terms missing".

Distinctiveness Conflict Risk

The ClaudeBar scope plus the explicit TDD framing carves a clear niche distinct from feature implementation. Not a 5: triggers like "User reports a bug or unexpected behavior" and "this doesn't work correctly" would equally claim a general debugging/troubleshooting skill, leaving minor overlap risk per anchor 4.