Conciseness

The body is dense with non-obvious, framework-specific rules — nothing explains concepts Claude already knows, and code examples are minimal and purposeful. Not 5: a few passages run long and could be trimmed — e.g. the schema-guidance paragraph at 'Write it so an agent can call the tool correctly on the first try…' packs many rules into one wall of prose, and the Do/Don't error-handling entries carry war-story justifications ('One production run spent 32% of its cost…') that could be shortened. Not 3: there is no over-explanation of known concepts; nearly every token carries project-specific information.

Actionability

Fully executable, copy-paste-ready content: a complete defineAction example with imports, schema, and typed run(); concrete frontend hook usage ('useActionQuery("list-meals", …)'); runnable commands ('pnpm action my-action --input data/source.json --output data/result.json'); an http option table; and a Troubleshooting section mapping each symptom to a specific fix. Not 4: code is complete rather than gap-bearing, and the common cases (create, query, mutate, imperative call, error handling) are all covered with specific examples.

Workflow Clarity

Sequencing is explicit — 'Decision order: existing action → extend/create a defineAction → custom route as last resort' plus a 'Stop trigger' before adding /api/ routes — and the Troubleshooting section provides symptom→fix feedback loops ('Frontend 405 — http.method doesn't match the hook'). Not 5: the main creation workflow is not laid out as an ordered sequence with explicit validation checkpoints (e.g. no 'generate types then check .generated/action-types.d.ts' verification step); not 3: most checkpoints are present, including 'pnpm actions:audit' for stale actions and the guard ratchet.

Progressive Disclosure

The body is a well-sectioned overview (~160 lines) with three real, one-level-deep reference files (references/action-fields.md, references/examples.md, references/provider-apis.md — all verified to exist), each clearly signaled both inline and in a dedicated References section with a one-line scope description ('references/action-fields.md — outputSchema, authorize, needsApproval, _agentImages, and exact auto-refresh rules'). Not 4: content split is appropriate throughout — the detailed field-level and provider-integration material lives in the references, not inline, and no reference nests further references.

Specificity

The description lists multiple concrete capabilities — 'create and run agent actions', 'the agent calls them as tools', 'frontend code calls them through client hooks', 'adding an API integration', 'wiring up frontend data fetching' — with comprehensive coverage of the skill's scope and no vague filler. Not 4: there are no minor gaps; every clause names a specific capability of the action system.

Completeness

It explicitly answers both questions: what ('How to create and run agent actions. Actions are the single source of truth for app operations…') and when ('Use when creating a new action, adding an API integration, or wiring up frontend data fetching') with concrete trigger phrases. Not 4: the 'when' clause is not merely present — it enumerates three explicit trigger scenarios.

Trigger Term Quality

'creating a new action', 'adding an API integration', and 'wiring up frontend data fetching' are natural phrases users would say, giving good keyword coverage. Not 5: a few natural synonyms users might use are missing (e.g. 'tool', 'endpoint', 'REST route', 'hook'); not 3: coverage goes well beyond a couple of generic keywords.

Distinctiveness Conflict Risk

The niche ('agent actions', 'client hooks', the defineAction ecosystem) is clear and framework-specific, making confusion with generic skills unlikely. Not 5: the trigger 'adding an API integration' overlaps with provider-integration skills (e.g. the skill's own references/provider-apis.md scope) and 'wiring up frontend data fetching' brushes against client-methods skills, so minor overlap risk remains.