Conciseness

No space is spent explaining concepts Claude already knows — every line is skill-specific protocol (capability model, event ordering, tombstones), and the Quick Start is three terse examples. Not 5 because several procedure steps (especially steps 4 and 6) are 100+ word run-on sentences mixing conditions, field lists, and host sequences that would be tighter as short sub-steps or a field table.

Actionability

Concrete executable guidance is present: `python3 "$AARON_SKILLS_ROOT/scripts/registry-events.py" is-suppressed <subject-id>`, the exact root-resolution snippet, named event fields (`expected_revision`, `subscription_status: subscribed`, `basis_ref`), and an exact host sequence ("`append consent` → confirm projection regenerated → `verify consent` → replay-safe `is-suppressed`"). Not 5 because the actual event payloads / NDJSON shapes are never shown inline — the upsert/suppress/erase append examples are deferred entirely to the registry-event-protocol reference, leaving the most common mutation path without a copy-paste-ready example.

Workflow Clarity

The 8-step procedure is clearly sequenced with validation checkpoints for the risky operations — "verify the registry script, event schema, and system catalog before invoking it", "regenerate ... then `verify consent` and re-run `is-suppressed` for changed subjects", and the refusal path that keeps execution `NEEDS_INPUT` with "no mutation occurred until that handoff runs". Not 5 because there are no explicit error-recovery/feedback loops (what to do when `verify consent` fails or a capability check rejects the append), which the batch/destructive operations here (erasure, suppression) warrant.

Progressive Disclosure

The body is structured as an overview pointing to detail files ("Reference Materials", "Runtime Reads"), but the actual bundle contains no references/, scripts/, or assets/ directories — every deferred path (`../../references/registry-event-protocol.md`, `../../references/runtime-invocation.md`, `../../references/send-benchmark.md`, `../../PRIVACY.md`, `../../SECURITY.md`, `scripts/registry-events.py`) resolves two levels outside the skill folder to files that do not exist in this bundle, so the navigation structure is broken for a standalone install. Not 3 because 'references present but not clearly signaled' understates the problem: the references are signaled but absent/non-resolvable, and the core protocol content they should carry is nowhere accessible; not 1 because the SKILL.md itself has clear sections rather than being a monolithic wall of text.

Specificity

Multiple concrete actions are named — "log this subscriber's opt-in", "record unsubscribes/complaints", "query lawful basis", "curates pseudonymous consent facts through the append-only consent stream", "applies suppression/erasure tombstones immediately" — with only minor gaps (restore and live suppression queries are not mentioned, and "curates consent facts" is slightly abstract). Not 5 because coverage of the skill's own operations (restore, is-suppressed check) is incomplete; not 3 because far more than 1-2 concrete actions are listed.

Completeness

It explicitly answers both: what ("curates pseudonymous consent facts through the append-only consent stream and applies suppression/erasure tombstones immediately") and when ("Use when the user asks to 'log this subscriber's opt-in', record unsubscribes/complaints, or query lawful basis") with concrete trigger phrases, plus explicit negative scope ("Not for SEND scoring — use email-quality-auditor; not for building segments — use list-segment-builder"). This matches the level-5 anchor exactly; the level-4 anchor's 'when could be more explicit' clearly does not apply.

Trigger Term Quality

Natural user-facing phrases like "log this subscriber's opt-in", "record unsubscribes/complaints", and "query lawful basis" would plausibly be said verbatim, and "opt-in"/"unsubscribe" are the domain's common terms. Not 5 because several natural synonyms are missing (suppress/suppression list, GDPR/erasure request, consent record); not 3 because the quoted trigger phrase is unusually natural and coverage goes well beyond a bare domain keyword.

Distinctiveness Conflict Risk

It carves out a clear niche (consent evidence and live suppression) and actively disambiguates the two nearest neighbors by name ("not for SEND scoring — use email-quality-auditor; not for building segments — use list-segment-builder"). Minimal conflict risk; the level-4 anchor ('minor overlap risk') is weaker than what the text demonstrates.