Conciseness

Mostly efficient, but there is noticeable repetition: the "Key Patterns" section re-shows client()/block_on() already demonstrated in the full step-1 example, the Auth section repeats "automatically inherit the CLI's authentication" from the Overview, and the Regeneration Safety table re-lists the Architecture file map. Not a 2 because there is no padding or explanation of concepts Claude already knows; not a 4 because several redundant passages could be trimmed.

Actionability

Fully executable, copy-paste-ready guidance: a complete Rust register() example with clap wiring, typed SDK invocation, error propagation, and output formatting, plus concrete build/test commands (cargo build; api get-movie <movieId>; RUST_LOG=debug). Covers the common case end to end, matching the top anchor.

Workflow Clarity

Clear sequence (edit cli/api/custom.rs, cargo build, run api <command> to test) with a Regeneration Safety section handling post-regeneration updates ("If the SDK surface changes... update your custom.rs to match"). Not a 5 because there is no explicit error-recovery feedback loop (e.g., what to do when the build or a command run fails); not a 3 because testing and regeneration checkpoints are explicit rather than implicit.

Progressive Disclosure

A well-organized single-file skill with no bundle files and clearly scoped sections (Overview, Architecture, Adding a Custom Command, Regeneration Safety, Build & Test); nothing that clearly belongs in a separate file is inlined. Not a 5 because at ~110 lines with internal repetition (Key Patterns vs. the main example) the content could be consolidated further.

Specificity

The description names a specific domain and mechanism ("author custom commands for the api CLI using the co-generated SDK") but lists only one concrete action; it does not mention registering commands, wiring the SDK client, or inheriting auth. It is above anchor 2 (more than a minimal action, names the co-generated SDK mechanism) but below anchor 4 (no list of several specific actions).

Completeness

Has a clear "what" (authoring custom commands for the api CLI via the co-generated SDK) but no "Use when..." clause or equivalent explicit trigger guidance, which caps completeness at 3 per the judging guidelines. It is not a 4 because the "when" is entirely absent rather than merely implicit.

Trigger Term Quality

Includes some relevant natural keywords ("custom commands", "api CLI", "SDK") but misses common variations users would naturally say, such as "add", "create", "extend", or "subcommand". Not a 4 because synonym coverage is thin; not a 2 because "custom commands" and "CLI" are genuine natural phrases rather than generic filler.

Distinctiveness Conflict Risk

"custom commands for the api CLI using the co-generated SDK" carves a mostly distinct niche with only minor overlap risk against generic CLI/API-usage skills. Not a 5 because it lacks distinct trigger phrases that fully separate it from other API/SDK-related skills.