Conciseness

Every section carries repo-specific, non-inferable detail (the `Kind.Enum()` drift trap, the 31-character factory-name panic, the `allowedResources` allowlist, migration patterns 083/099), and conceptual background is delegated to `docs/contributing/go/authz.md` and two reference files rather than restated. It assumes Claude's competence throughout — I could not identify a passage that is padding or a trimmable explanation, which is the 5 anchor rather than the minor-trimmable-instances anchor at 4.

Actionability

Guidance is copy-paste ready throughout: exact file paths (`pkg/types/coretypes/registry_kind.go`), real code snippets (`KindThing = MustNewKind("thing")`, the `Transaction` entry, the `allowedResources` line), exact commands (`go run cmd/enterprise/*.go generate openapi/authz/config transaction-groups`, `uv run pytest --basetemp=./tmp/ -vv --reuse ...`), and even the migration-name regex `^[a-z][a-z0-9_-]{0,30}$` with a preferred short name. This matches the fully-executable anchor at 5.

Workflow Clarity

Steps 1–7 are clearly sequenced, preceded by a triage table mapping work shapes to step subsets, and closed by a Verification section with a build command, seven explicit consistency greps, and integration suites to run. The batch migration step includes idempotency (`ON CONFLICT ... DO NOTHING`) and an explicit user checkpoint ("Ask the user whether backfill is needed rather than assuming"), so the missing-validation cap at 3 does not apply and the explicit-checkpoint anchor at 5 fits.

Progressive Disclosure

SKILL.md is a concise overview; detail lives in exactly two one-level-deep references (`references/route-wiring.md`, `references/integration-tests.md`), both verified to exist and to deliver the promised content (real route-wiring examples from `serviceaccount.go`; suite layout, fixtures, and run commands). Each reference is clearly signaled with when to read it ("Read references/route-wiring.md before wiring any create route, linking route, or custom selector"), matching the clear-overview anchor at 5.

Specificity

Enumerates five concrete, distinct actions — "register kinds/resources, grant managed-role permissions, wire routes with ResourceDefs, backfill tuples for existing orgs, and write the authz integration tests" — covering the full workflow with no gaps, matching the comprehensive-coverage anchor rather than the minor-gaps anchor at 4.

Completeness

Explicitly answers "what" with a third-person action list and "when" twice — "Use this whenever the user mentions authz..." and "Also use it when a new API endpoint is being added and its access control hasn't been decided yet". The explicit when-clause with concrete trigger phrases matches the 5 anchor exactly; the missing-when cap at 3 does not apply.

Trigger Term Quality

Covers synonyms and natural user phrasings comprehensively: "authz, authorization, permissions, access control, managed roles (admin/editor/viewer), OpenFGA, ResourceDef, CheckResources, 403/forbidden behavior", "wiring or protecting a new route", "role-based allow/deny". Both technical terms and colloquial triggers a user would actually say are present, so it exceeds the good-coverage anchor at 4.

Distinctiveness Conflict Risk

Clear niche (SigNoz backend authorization) anchored by project-specific terms — OpenFGA, ResourceDef, CheckResources, managed roles — that no generic skill would share, giving minimal conflict risk. It is distinct on its triggers, not merely "mostly distinct" as at 4; the one broadening clause (new API endpoints) is still scoped to authz decisions within this repo.