Conciseness

Mostly efficient and free of basic-concept explanations, but noticeably tightened-candidate material: 'channel-registry is the sole writer of memory/channels/' appears in Writes, step 7, and Save Results; the propose-via-registry-events.py instruction is given three times; and the no-automation red line is restated three times (scope guard, step 1's 风控/封号 note, Data Sources). This fits the 3 anchor ('some unnecessary explanation or could be tightened') better than the 4 anchor, where trims would be minor.

Actionability

Concrete, specific guidance throughout: a sample UTM taxonomy ('utm_source=<surface>&utm_medium=social-share'), a runnable command ('python3 scripts/connectors/pageviews.py'), a timed field-coding plan ('run 2-4 weeks, then code recurring answers'), and per-heuristic decomposition rules. Not a 5 because several steps remain directional (e.g. 'Inventory the share surfaces and forms' and 'Declare the method' specify what to produce but not formats or thresholds).

Workflow Clarity

An 8-step numbered procedure in dependency order with an explicit completion checklist ('Done when: the method doc names every heuristic with an Estimated/proxy label...') and hard gates ('never written to decisions.md directly', 'Do not write memory without asking'). This matches the 5 anchor's 'clear sequence with explicit validation steps... checklists'; the 4 anchor would require missing checkpoints, and the destructive/batch cap does not apply since no batch/destructive operation is performed.

Progressive Disclosure

Good structure: a dedicated 'Reference Materials' section where each link carries a one-line description, plus a 'Runtime Reads' section, all one level deep; heuristics and procedure are appropriately inline. Not a 5 because the ten-plus cross-skill and reference links are scattered across the scope guard, contract, procedure, and reference list rather than consolidated, and the referenced files (e.g. ../../../references/echo-benchmark.md) do not exist in this bundle, so navigation cannot be fully verified.

Specificity

Lists multiple specific concrete deliverables — 'a share-link/UTM hygiene spec for owned share surfaces', 'a self-reported attribution field design that replaces an existing form field', 'a GA4 direct-traffic decomposition read (deep-URL directs, mobile-app skew, private-push correlation)', 'a branded-search-lift proxy from GSC plus Wikipedia pageviews' — with comprehensive coverage and no vague filler. It exceeds the 4-anchor ('Lists several specific actions; minor gaps') because coverage of the skill's outputs is exhaustive.

Completeness

Explicitly answers 'when' ('Use when the user asks to...') and 'what' ('produces a share-link/UTM hygiene spec... decomposition read... branded-search-lift proxy'), with concrete trigger phrases — the exact shape of the 5 anchor's example. Not a 4, because neither half is generic or implicit.

Trigger Term Quality

Quotes the exact natural phrases users would say ('figure out where our direct traffic really comes from', 'measure dark social', 'add a how-did-you-hear-about-us field', 'show social drives signups without click data') plus tool names (GA4, GSC) and bilingual synonyms (暗社交归因/直接流量分解). This matches the 5 anchor's 'comprehensive coverage of natural terms including synonyms' and clearly beats the 4 anchor, which allows missing natural terms.

Distinctiveness Conflict Risk

Clear niche (organic dark-social estimation) with explicit conflict fencing: 'Not for paid-channel attribution reconciliation (platform-claimed vs analytics conversions) — use attribution-reconciler.' Minimal conflict risk, matching the 5 anchor; the 4 anchor's 'minor overlap risk with closely related skills' doesn't apply given the named delegation.