Conciseness

Every token is repo-specific and load-bearing — rules carry only their own rationale ("the ledger would record it as applied and it would never retry") with no explanation of concepts Claude already knows and no padding. Matches the anchor-5 lean/efficient example; anchor 4 would require trimmable over-explanation, and none is present.

Actionability

Fully executable: a complete copy-paste defineStore() example with baseline, index and data migrations, exact commands ("pnpm gen:store-registry", "pnpm guard:release-schema-complete", "pnpm guard:additive-migrations"), named spec files, and a pointed test-helper ("db/store-ledger.test-helpers.ts"). Matches anchor 5's copy-paste-ready guidance covering the common cases.

Workflow Clarity

"Then run, in this order" gives a numbered generate → snapshot → guard → spec sequence with explicit validation checkpoints and failure feedback ("release-schema.snapshot.spec.ts fails when the snapshot no longer covers every schema migration"; the upgrade spec "fails when your change does not reach existing databases"). This satisfies the destructive/batch validation requirement that would otherwise cap the score at 3, and the error-recovery guidance ("fix the migration or the deploy, never catch it") matches anchor 5.

Progressive Disclosure

Sections are clear and well-ordered, but the ~120-line body inlines detail that could sit in reference files (the three readiness modes, the reviewed-exceptions list), and no bundle files exist at all. The <50-line simple-skill exception for scoring 5 does not apply; still comfortably above anchor 3 because nothing is misplaced or buried — it is genuinely good structure with minor organization gaps.

Specificity

"declare and change their schema with defineStore()" plus "adding a table, column, index, backfill or seed to a core store" names several concrete actions in a specific domain. It stays at anchor 4 rather than 5 because coverage has minor gaps (e.g., folding a runMigrations list and releaseOnly stores are body-only capabilities not reflected here).

Completeness

Explicitly answers what ("How framework-owned tables in packages/core declare and change their schema with defineStore()") and when ("Use before adding... before writing an ensure*Table() function, and when guard:release-schema-complete or SchemaNotMigratedError fires") with concrete trigger phrases. Matches the anchor-5 example's structure of a clear what followed by explicit when-clauses.

Trigger Term Quality

Natural terms a developer would say are well covered: "table, column, index, backfill, seed", "ensure*Table()", and the concrete signals "guard:release-schema-complete" and "SchemaNotMigratedError". Not anchor 5 because a common synonym like "migration" (the skill's central concept) is absent from the trigger phrasing.

Distinctiveness Conflict Risk

"framework-owned tables in packages/core" carves a clear niche with distinct triggers; the closely-related app-owned-tables territory is explicitly excluded, leaving minimal conflict risk with sibling skills. Not a lower anchor: it is far more discriminating than the anchor-4 "PDF and Word document files" style of overlap.