Content
82%Weight 40%Scale 1-5Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
The body is an exemplary lean rules reference: opinionated, non-obvious guidance with executable Don't/Do examples and no filler. It falls slightly short of top marks on actionability and workflow because a few headline rules (notably boundary validation) lack code and there is no explicit type-check verification step after applying a refactor.
Suggestions
Add a short boundary-validation example (a parse function turning `unknown` into a named domain type) since it is one of the five capabilities named in the description but has no code in the body.
Include a verification checkpoint such as 'run `tsc` after refactoring a cast away to confirm the substitution type-checks' to close the feedback loop for the Earned cast workflow.
Consider moving the extended pattern write-ups into a references/ file, keeping the rules table plus one flagship example in SKILL.md to lower context cost when only the rules are needed.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The body is a dense rules table plus short Don't/Do code contrasts; no basic TypeScript concepts are re-explained and there is no padded prose. Every line carries a rule or an example, matching the 'lean and efficient; every token earns its place' anchor. | 5 / 5 |
Actionability | Mostly executable guidance: real, copy-paste TypeScript for discriminated unions, branded types, NonEmpty tuples, exhaustiveness arms, and `satisfies`. Minor gaps remain — boundary validation (a headline capability in the description), schema-derived types, and object args get directive one-liners in the table but no code example. | 4 / 5 |
Workflow Clarity | There is no multi-step procedure to sequence, but the decision heuristics are explicit: 'Earned cast' gives a four-branch diagnostic for refactoring an `as` away, and 'Simplest total type' lists concrete tells (`!`, `arr[0] as T`, a "should never happen" throw). What keeps it below 5 is the absence of any compile-check validation loop (e.g. 'run tsc to confirm the cast is gone'). | 4 / 5 |
Progressive Disclosure | A single well-organized file: a rules table for scanning, a Patterns section for depth, and one clearly signaled external link (the attribution). At ~90 lines it exceeds the under-50-line case where a single file alone earns top marks, and some pattern write-ups could live in a references file, so structure is good but not maximally split. | 4 / 5 |
Total | 17 / 20 Passed |