Conciseness

The body is dense with framework-specific facts Claude would not know (navigation keys, TAB_ID resolution, requestSource semantics) and wastes no tokens explaining general concepts. Minor over-explanation remains: the 'Why' paragraph ('Without context awareness, the agent is blind... feels like a collaborator') is motivational padding, and the Do/Don't lists restate body guidance (e.g., 'Don't duplicate whole URL query strings into `navigation`' repeats the `__url__` section). Not 5 because of this redundancy; not 3 because the bulk is lean and non-obvious.

Actionability

Concrete, near-executable code for every pattern: the `useNavigationState` hook, `readAppState("navigation")`, a full `view-screen` action, the `navigate` write, and `useDbSync({ ignoreSource: TAB_ID })`. Not 5 because of minor gaps — `fetchEmailList`/`fetchThread` are undefined placeholders in the view-screen example and `getCommandPath: (command: any)` uses an untyped any; not 3 because the code is real TypeScript, not pseudocode, and covers the common cases.

Workflow Clarity

The bidirectional protocol is clearly sequenced: UI writes `navigation` on route change → `<current-screen>` is auto-injected every turn → agent reads state before acting → `view-screen` for richer snapshots → one-shot `navigate` command consumed and deleted by the UI. Guard conditions are explicit ('only when `selection` is null should the agent ask which item', 'have the UI prefer `path` before falling back to semantic routing'). Not 5 because there are no explicit validation/verification checkpoints (e.g., handling a null or stale `navigation` read); not 3 because the sequence is coherent, explicit, and the operations are non-destructive so the validation cap does not apply.

Progressive Disclosure

No bundle files exist (references/, scripts/, assets/ are absent), so all content is appropriately inline, organized under clear headers (Rule, Why, Core Patterns 1-4, Jitter Prevention, Gold-Standard Example, Do, Don't, Related Skills) with a Related Skills section providing outward navigation. Not 5 because some sections (Jitter Prevention's useDbSync internals, the mail Gold-Standard Example) overlap with the related real-time-sync skill and could be a one-line pointer; not 3 because structure is good and nothing is buried or misplaced.

Specificity

The 'Use when' clause lists several concrete actions — 'exposing UI state to the agent', 'implementing view-screen or navigate actions', 'wiring navigation state', 'debugging agent context issues' — but the opening 'How the agent knows what the user is looking at' is a conceptual framing rather than an enumerated capability, leaving minor coverage gaps. Not 5 because the capability list is not comprehensive; not 3 because it names more than 1-2 concrete actions in the domain.

Completeness

Both parts are explicitly present: the what ('How the agent knows what the user is looking at') and an explicit, concrete when ('Use when exposing UI state to the agent, implementing view-screen or navigate actions, wiring navigation state, or debugging agent context issues'). Matches the anchor-5 example structure; not 4 because the 'when' is already explicit and specific with concrete trigger phrases.

Trigger Term Quality

Natural trigger phrases a developer would say include 'exposing UI state', 'view-screen or navigate actions', 'wiring navigation state', and 'debugging agent context issues'. Not 5 because common variations/synonyms (e.g., 'selection state', 'current screen', 'agent context') are only partially covered; not 3 because keyword coverage is good rather than merely 'some relevant keywords'.

Distinctiveness Conflict Risk

The description carves a clear niche (agent navigation/UI-state awareness) with distinct triggers like 'view-screen or navigate actions'. Not 5 because 'debugging agent context issues' is broad and overlaps slightly with closely related skills (e.g., real-time-sync, actions); not 3 because the bulk of triggers are specific to this skill's domain.