Conciseness

The ~360-line body is dense and imperative with almost no explanation of concepts Claude already knows — every section encodes project-specific invariants, failure modes, and edge cases. Minor trimming is possible (e.g., identity/authorization warnings repeated across the surface-adapter sections), which keeps it just below the 'every token earns its place' anchor.

Actionability

Fully concrete: executable check commands ('bun run --cwd apps/sim test ...', 'bunx biome check', 'bunx turbo run type-check', 'bun run check:audits', 'git diff --check'), exact foundation file paths to read, and complete TS examples for defineWorkspaceOperation, defineAuthorizedWorkspaceUseCase, and the Copilot adapter. The illustrative nature of the code is explicitly justified ('Adapt the example to the domain's real authorization options; do not copy invented field names'), satisfying the rubric's flexibility exception.

Workflow Clarity

The phases are clearly sequenced (read foundation → bound the migration → freeze baseline → define operation → implement use case → adapt each surface → identity/attribution → special cases → test → parallel work → hand off) with explicit validation checkpoints: the 'test-audit' gate before writing tests, characterization tests gated on 'test-audit', fail-fast rules throughout, and a concrete verification command block with 'Do not claim a check passed unless it completed successfully'. This is a batch/behavior-preservation migration skill and the required feedback loops (inject failure after each committing step, re-check) are present.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), so the body carries all content; it is well-sectioned with clear ## / ### headers and navigable ordered phases. Minor gap: per-surface adapter detail (e.g., the Copilot section, special cases) is inlined and could be split into one-level-deep reference files to keep SKILL.md leaner — 'good structure, minor organization gaps' rather than an ideal split.

Specificity

Multiple concrete actions are listed: 'Create or migrate a protected Sim resource operation', 'adding a protected endpoint, tool command, or CRUD method', 'removing route- or tool-local authorization and business logic', 'consolidating resource reads or writes behind semantic operation policies', and 'adding another surface to an existing application operation'. Coverage is comprehensive and stays in third person.

Completeness

Explicitly answers 'what' ('Create or migrate a protected Sim resource operation...') and 'when' with a concrete 'Use when adding a protected endpoint, tool command, or CRUD method; removing route- or tool-local authorization...' clause, plus explicitly scoped special cases (v1, uploads, streams, large bodies, bulk recursion, polymorphic tools).

Trigger Term Quality

Good natural trigger phrases: 'adding a protected endpoint', 'tool command', 'CRUD method', 'Copilot'. However, much of the phrasing is dense internal jargon ('shared Principal and application-use-case architecture', 'semantic operation policies') that a user would not naturally say, and a few natural variations (e.g., 'add a route', 'wire up a tool') are absent — falls just below the comprehensive-with-synonyms anchor.

Distinctiveness Conflict Risk

Clear niche: 'Sim resource operation', 'Principal', 'Copilot', 'v1', 'uploads, streams, large bodies, bulk recursion' are highly specific to this codebase's operation-migration task; minimal risk of triggering for a different skill.