Conciseness

The body is a lean 33-line checklist with zero concept explanations: every line is either an actionable audit item, a concrete command ("run `intent load @tanstack/table-core#migrate-v8-to-v9`"), or a pointer. It assumes Claude's competence throughout, e.g. "Framework prerequisite: Solid 1.3 or newer (`solid-js >=1.3`)" states the constraint without explaining Solid.

Actionability

Each checklist item names exact APIs to replace ("Replace `createSolidTable` with `createTable`", "Replace `getState()` with narrow tracked atom reads", "Replace function rendering with `FlexRender` components") and gives concrete commands and paths (`node_modules/@tanstack/solid-table/dist/index.d.ts`). Full executable code lives in the clearly signaled `references/adapter-migration.md`, which contains complete, copy-paste ready TSX examples.

Workflow Clarity

The sequence is explicit: load the core skill first, audit, read details conditionally ("When the audit finds old Solid construction, state, rendering, or app-hook code, read [adapter migration details]"), then a dedicated "Verify the migration" section with concrete checkpoints (type-check against the installed v9 adapter, exercise every enabled feature flow). It falls short of a 5 because there is no explicit error-recovery feedback loop (e.g. what to do when the type-check fails).

Progressive Disclosure

The SKILL.md is a clear overview with a single well-signaled, one-level-deep reference (`references/adapter-migration.md`, verified to exist) whose read trigger is conditional and specific. Shared core changes are delegated to the core migration skill, and the body warns that "Renaming `createSolidTable` alone does not complete the migration" rather than duplicating that content. Sibling-skill links (getting-started, table-state) are cross-references, not nested detail levels.

Specificity

"Migrate solid Table v8 to v9. Audit framework construction, rendering, state, and app hooks" lists several specific concrete actions/audit areas plus delegation of shared API changes. It matches anchor 4 (several specific actions, minor gaps) rather than 5 because coverage is not comprehensive — e.g. verification and feature-specific migration outcomes are only implied.

Completeness

The "what" is clear (migrate Solid Table v8 to v9, auditing construction/rendering/state/app hooks), but there is no "Use when..." clause or equivalent explicit trigger guidance, capping completeness at 3 per the judging guidelines. It is not a 4 because the "when" is entirely absent rather than merely imprecise, and not a 2 because the "what" is specific and concrete.

Trigger Term Quality

Natural terms a user would say are present ("Migrate", "Table v8 to v9", "solid", "audit"), matching anchor 4 (good keyword coverage, a few natural terms missing). It is not a 5 because common variations users actually say are absent: "TanStack", "@tanstack/solid-table", and "upgrade".

Distinctiveness Conflict Risk

"Migrate solid Table v8 to v9" with "shared API changes in the core migration skill" carves out a clear, narrow niche and explicitly partitions scope from the core migration skill, minimizing conflict risk. Version- and framework-specific triggers make it unlikely to fire for the wrong skill.