Conciseness

Per-line the body is punchy and imperative, but the core rule is restated across four sections (Iron Law, Common Rationalizations, Red Flags, Final Rule), and several items appear near-verbatim in both the Rationalizations table and the Red Flags list ('Keep as reference', 'Deleting X hours is wasteful', 'TDD is dogmatic', 'spirit not ritual'). This systematic duplication exceeds the 'minor instances of over-explanation' of anchor 4 and fits anchor 3: mostly efficient but includes content that could be tightened.

Actionability

Fully executable guidance throughout: concrete TypeScript test and implementation examples, exact commands ('npm test path/to/test.test.ts'), paired Good/Bad examples, and a complete worked bug-fix example showing expected FAIL and PASS output. It is not anchor 4 because the examples cover the common cases (feature via retry, bug fix via form validation) without meaningful gaps.

Workflow Clarity

The RED -> Verify RED -> GREEN -> Verify GREEN -> REFACTOR -> Repeat cycle is explicitly sequenced with mandatory verification commands at each phase, error-recovery feedback loops ('Test errors? Fix error, re-run until it fails correctly'; 'Test fails? Fix code, not test'), and a pre-completion checklist. The destructive-operation cap does not apply because validation steps are present and explicit.

Progressive Disclosure

One reference file is clearly signaled and real ('read [references/writing-good-tests.md] for the rules that keep tests honest') with a bullet summary of its contents, one level deep — good structure. Not anchor 5 because the ~315-line SKILL.md retains substantial inline material (the rationalization rebuttal table, the graphviz cycle diagram) that arguably belongs in the reference file.

Specificity

'Implements a feature or bug fix test-first - write one failing test, watch it fail, write the minimal code to pass, then refactor with tests green' enumerates the complete concrete action cycle of the skill with no gaps within its domain. It exceeds anchor 4 ('several specific actions; minor gaps in coverage') and matches anchor 5's comprehensive multi-action coverage.

Completeness

Explicitly answers both 'what' (the full red-green-refactor cycle with concrete actions) and 'when' ('entered by requests like... once delivery-flow is driving the change'), with concrete trigger phrases plus a do-not-activate boundary clause. This matches anchor 5 exactly.

Trigger Term Quality

Concrete request phrases are natural — 'implement this feature', 'fix this bug', 'write the code for this', 'add the tests and implement it' — but common synonyms a user would say, such as 'TDD', 'test-driven development', or 'write the tests first', are absent. This fits anchor 4 (good keyword coverage, a few natural terms missing) rather than anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

'Do not activate directly for a standalone request that has not gone through delivery-flow first' defines a clear niche (the implementation stage of the delivery-flow workflow) with explicit anti-trigger guidance, minimizing the risk of firing for standalone implementation requests that belong to other skills. Clear match for anchor 5.