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.
A strong, information-dense body: executable code throughout, trap callouts (documentTypeListItems dropping singletons, .singletons() forbidding .items()), and two complete migration workflows. The main gaps are mild verbosity in the validation/rationale passages and the absence of an explicit post-migration verification step.
Suggestions
Add a final verification step to both migration workflows (e.g., "start the Studio and confirm the singleton appears in the content list and its schema type is gone from the create-new menu") to close the workflow_clarity gap.
Tighten the config-resolution validation bullets and the 'dangling singletons' rationale into shorter rule statements — the parenthetical-heavy prose is the main conciseness cost.
Consider moving the sanity-plugin-singleton-management migration table and steps into a reference file linked from a short summary section, keeping SKILL.md focused on the first-class API.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The body is dense with non-obvious API detail ("Filters the `duplicate` document action, after all user resolvers run", config-resolution validation rules, template-tagging semantics) and does not explain concepts Claude already knows. Some passages — the four long validation bullets and the "dangling singletons" rationale ("Any heuristic short of eager resolution would misfire, because manual `S.document().documentId(...).schemaType(...)` wiring is supported") — are wordier than strictly necessary and could be tightened, matching anchor 4 rather than anchor 5. | 4 / 5 |
Actionability | All code is executable and copy-paste ready: the full `defineConfig` registration with string shorthand and `defineSingleton`, structure-builder chains at three levels, the escape-hatch template, the `context.singleton` action filter, and the one-to-one plugin-migration table. Specific worked cases (shared schema types, explicit plugin ids, default vs. explicit document ids) cover the common situations, matching anchor 5. | 5 / 5 |
Workflow Clarity | Both migration paths give numbered, decision-aware steps ("If the plugin call passed an explicit `id`, carry it over as the definition's `documentId"; the shared-schema-type branch in step 4) plus an upfront version check ("Check the installed version in the lockfile before using this API"). The operations are not destructive/batch so no hard cap applies, but there is no explicit post-change verification step (e.g., restart Studio and confirm the type is gone from create menus), leaving it at anchor 4 rather than 5. | 4 / 5 |
Progressive Disclosure | No bundle files exist and the ~195-line body is organized into clear, well-labeled sections with one-level-deep references (GitHub source links, the `sanity-best-practices` skill). The two plugin-migration sections (a table plus ~10 steps each) are specialized enough that they could live in reference files — a minor organization gap — so anchor 4 fits better than anchor 5's ideal split, while the content is far from anchor 3's "content that should be separate is inline". | 4 / 5 |
Total | 17 / 20 Passed |