Content
77%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
A high-quality, actionable TDD skill with a clear, validated workflow and concrete executable code. The two soft spots are conciseness (some prose/bullet redundancy with the code examples) and progressive disclosure (a 325-line monolith with no external references where detail could be split out).
Suggestions
Collapse the 'Characteristics of good tests' and 'Red flags' bullet lists into the surrounding prose or the code comments to remove redundancy and tighten the Philosophy section.
Split the detailed Type Testing section (~60 lines of utility code) into a references file (e.g. references/type-testing.md) and link to it from a short overview, adding one-level-deep progressive disclosure.
Consider moving the Mocking and Interface Design deep-dives into a reference file, keeping SKILL.md as a lean overview of philosophy + workflow that points to the detail.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | Mostly efficient and substantive (horizontal-slice anti-pattern, deep modules, type-testing utilities earn their place), but prose plus bullet lists ('Characteristics of good tests', 'Red flags') restate lessons already shown in code comments, and the good/bad example pairs carry some redundancy — it could be tightened. | 2 / 3 |
Actionability | Provides real TypeScript/JS syntax throughout (no pseudocode), copy-paste-ready type utilities (Expect/Equal/Not/IsAny/IsNever), a concrete command ('bun typecheck'), and concrete workflow steps with checklists — fully actionable, above the score-2 'incomplete/pseudocode' anchor. | 3 / 3 |
Workflow Clarity | Clearly sequenced Planning → Tracer Bullet → Incremental Loop → Refactor with explicit validation checkpoints ('confirm it FAILS correctly' / 'confirm it PASSES'), feedback loops distinguishing errors from assertion failures, and checklists; no destructive/batch validation gap applies. | 3 / 3 |
Progressive Disclosure | No bundle files exist and the body contains no external file references; it is well-sectioned but monolithic at ~325 lines, with substantial inline content (Type Testing, Philosophy) that could be split into reference files, so it does not reach the 'one-level-deep references, content appropriately split' score-3 anchor and the under-50-line exception does not apply. | 2 / 3 |
Total | 10 / 12 Passed |