Conciseness

Mostly efficient — no generic-concept padding — but noticeably repetitious: the 'sole writer of memory/narrative-registry/' rule and the 'authorized operation: propose request to registry-events.py' pattern each appear three times (Scope guard, Skill Contract, Save Results), and the resonance-monitor disambiguation is restated in three sections. Fits the 3 anchor ('could be tightened'); not 2 because it never explains concepts Claude already knows, and not 4 because the duplicated guardrails are a real trimming opportunity, not minor.

Actionability

Concrete guidance throughout: exact paths (memory/narrative-registry/canon.md, versions.md), a verdict taxonomy (matches / drifted / contradicts), a decision enum (retain|retest|reversion-proposal|unknown), and evidence labels (Measured / User-provided / Estimated). It falls short of the 5 anchor because wayback.py and registry-events.py are invoked by name only — no invocation syntax, arguments, or output shape appears in the skill, and the recipes live in an unbundled CONNECTORS.md.

Workflow Clarity

Seven clearly sequenced steps with explicit validation checkpoints and feedback paths: step 1 stops with NEEDS_INPUT when no canon exists ('no canon' is never pass-by-default), step 2 records an explicit 'no history available' note rather than guessing, step 6 refuses to call a message validated without a matching result observation/contract, plus a 'Done when' checklist, decision routing, and termination/ambiguity rules. Matches the 5 anchor (explicit validation steps, error recovery, checklist).

Progressive Disclosure

Good structure: clean sections (Quick Start, Skill Contract, Data Sources, Instructions, Save Results, Reference Materials, Next Best Skill) and a well-labeled, one-level-deep reference list. However, the skill ships no bundle files of its own, and several load-bearing references (../../../references/skill-contract.md, ../message-test-designer/references/stimulus-binding.md, ../../../CONNECTORS.md) resolve outside the skill directory and cannot be verified from the bundle — minor organization gaps that hold it at the 4 anchor rather than the fully self-contained 5.

Specificity

Lists multiple concrete, comprehensive actions: 'self-drift per flagship surface vs the narrative-registry canon over time (via wayback.py…)', 'competitor-repositioning alerts', 'an explicit repositioning-trigger condition set', and 'a D1/W1/M1 message-shift retro', each with named mechanics (as-of dates, evidence labeling). This matches the 5 anchor (multiple specific concrete actions, comprehensive coverage); it is not 4 because there are no meaningful gaps in the action inventory.

Completeness

Explicitly answers both: what ('produces a drift report — self-drift… competitor-repositioning alerts, an explicit repositioning-trigger condition set, and a D1/W1/M1 message-shift retro') and when ('Use when the user asks to…' with three concrete quoted trigger phrases), plus explicit negative scope routing to three sibling skills. Matches the 5 anchor exactly; the 'when' is explicit and multi-phrased, not merely present as at 4.

Trigger Term Quality

Includes natural quoted trigger phrases a user would actually say — "check if our surfaces have drifted from the canon", "watch for competitor repositioning", "define when we should reposition" — plus drift/repositioning variants. Good coverage, but a few natural synonyms (e.g. "brand message changed over time", "consistency check over time") are missing, so it fits the 4 anchor rather than the comprehensive-synonyms 5 anchor.

Distinctiveness Conflict Risk

Clear niche (post-launch narrative drift monitoring) with explicit disambiguation — 'not for the first-time consistency check… use narrative-cascade-planner; not for computing the TALE profile result… use narrative-quality-auditor; not for echo-rate / AI-answer resonance measurement — use narrative-resonance-monitor'. Minimal conflict risk, matching the 5 anchor; at 4 there would be residual overlap with closely related skills, which the explicit negative scope eliminates.