Conciseness

The ~270-line body contains no filler about concepts Claude already knows — nearly every sentence is repo-specific invariant — but the prose is ornate (long multi-clause justifications such as the `allowedIntegrations` enforcement paragraph) and the closing checklist restates the step sections, so it could be noticeably tightened. It is above 2 because the density is load-bearing rather than padded, and below 4 because the trimming opportunities are more than minor.

Actionability

The skill supplies copy-paste-ready snippets for each concrete case (field entry, capability rule, `defineWorkspaceOperation`, the `// permission-group-enforced:` call-site annotation, the parameterized wrapper) plus exact helper names, file paths, and runnable `bun run check:*` commands. This matches the top anchor of fully executable guidance covering the common cases.

Workflow Clarity

Steps 0–7 are clearly sequenced, and Step 7 provides explicit validation: the three audit commands, reading success lines rather than exit codes, comparing counts against the previous run, and error-recovery direction ('if a self-check fires, teach the parsers the new form rather than working around it'), capped by a pre-finish checklist. Feedback loops and checkpoints are all present, matching the top anchor.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), so everything — including auxiliary material like the principal/identity tables and the traps catalog that could live in one-level-deep reference files — is inlined in a single long SKILL.md. Section headers do give genuine structure, matching the 3 anchor ('some structure ... content that should be separate is inline'), but it is not a 4 because no content is split out or referenced and the file reads as a monolith beyond a single procedure's needs.

Specificity

The description names the three concrete artifact kinds ("a boolean restriction, an allowlist, or a denylist") and the full wiring path ("from the field registry through the capability rule to the server gate that actually refuses"), giving comprehensive, concrete coverage of what the skill produces. It is not a 4 because no coverage gaps are evident within its stated domain.

Completeness

Both halves are explicit: the what ("Add a new governed item ... wired end-to-end from the field registry through the capability rule to the server gate") and the when ("Use when adding a key to `PERMISSION_GROUP_FIELDS` or a capability to `CAPABILITY_RULES`") with concrete trigger phrases. This matches the top anchor exactly; a 4 would require a less explicit or specific when-clause.

Trigger Term Quality

Triggers include natural domain terms ("permission groups", "restriction", "allowlist", "denylist") plus the exact code identifiers `PERMISSION_GROUP_FIELDS` and `CAPABILITY_RULES`, which fire reliably in this codebase. It falls short of 5 because common synonyms and phrasings a user might naturally say (e.g., "gating a feature", "withholding access", "restriction key") are absent.

Distinctiveness Conflict Risk

The description occupies a clear niche ("Sim's enterprise permission groups") anchored by codebase-specific registry names, so it is highly unlikely to trigger for the wrong skill. It is above the 4 anchor because no overlap with closely related skills is identifiable.