Conciseness

The body is lean and bullet/table-driven with no explanations of concepts Claude already knows — the severity table and output template earn their tokens. It is not a 5 because of a few rhetorical flourishes ('The real problem is not a missing ping', 'The job is to turn scattered events into one operator surface with: clear severity / clear ownership...') that restate the description without adding operational value.

Actionability

Concrete, executable-for-a-design-skill guidance: a four-class severity table with examples and default handling, a five-step workflow with per-step specifics, decision rules, and a copy-ready output-format template. As an instruction-only skill the absence of code is not penalized (per scoring notes), but a few workflow steps stay at the level of high-level hints ('Call out what ECC already owns') rather than specific instructions, keeping it below anchor 5.

Workflow Clarity

A clearly sequenced five-step workflow (inventory → decide interruption → collapse duplicates → design workflow → return action-biased design) with concrete per-step checklists. No explicit validation checkpoints exist, but the skill is analytical/design work with no destructive or batch operations, so the validation cap does not apply; minor implicit-checkpoint gaps (e.g. no 'confirm the inventory with the user before designing') keep it at 4 rather than 5.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are all absent), and the single SKILL.md is well-organized with clear section headers that make navigation easy. At ~185 lines it exceeds the under-50-line simple-skill case, and content like the severity model or output format could plausibly live in a reference file for an ECC suite that clearly has related skills, so it sits at 'good structure, minor organization gaps' rather than a 5.

Specificity

The description names the domain ('notifications across GitHub, Linear, desktop alerts, hooks') but the 'what' is a single abstract action — 'Operate notifications as one ECC-native workflow'. The concrete verbs (routing, deduplication, escalation) appear only as trigger conditions rather than stated capabilities, so it sits between anchor 3 ('names domain and 1-2 concrete actions') and anchor 4 ('several specific actions'); it is not a 4 because no list of concrete performed actions is given.

Completeness

Both parts are present: an explicit 'Use when the real problem is alert routing, deduplication, escalation, or inbox collapse' (concrete trigger phrases) and a what-clause ('Operate notifications as one ECC-native workflow across GitHub, Linear, desktop alerts, hooks'). Not a 5 because the 'what' is somewhat abstract compared to the anchor-5 example's enumeration of concrete capabilities.

Trigger Term Quality

Phrases like 'alert routing', 'deduplication', 'escalation', 'inbox collapse', 'desktop alerts', and 'hooks' are natural things a user would say when needing this skill. It falls short of anchor 5 only because common variations and synonyms ('notifications are too noisy', 'mute/snooze', specific channels like Slack or email as user-spoken terms) are missing.

Distinctiveness Conflict Risk

The niche — consolidating fragmented notification surfaces into one ECC-native lane — is distinct with clear triggers. Minor overlap risk remains with adjacent operational skills the body itself references (github-ops, project-flow-ops), keeping it below anchor 5.