Conciseness

The ~320-line body is dense and mostly high-signal with little padding or explanation of concepts Claude already knows, but sections like 'The app's group in Settings' inline reference-grade API detail (e.g., 'appAreas: [{ id, label, content, visible?, keywords?, searchEntries? }]', 'settings.$.tsx' splat wiring, SettingsTabsPage prop semantics) that could be tightened or split out. It is below 4 because of this volume of inline reference material, but above 2 because nearly every sentence carries a non-obvious rule.

Actionability

Concrete, executable guidance is present throughout: 'agent-native eject --list', 'buildSettingsRoute(page, sub?, { anchor? })', 'registerRequiredSecret({ kind: "api-key" })', 'registerSettingsPages([...])', the preflight classification table, and exact file paths like 'packages/core/src/navigation/settings-redirects.ts'. It falls short of 5 because there are no complete copy-paste examples and a few directives remain abstract ('Decide the shared contract').

Workflow Clarity

'Discover Before Building' gives a numbered 1-4 sequence and the 'Implementation Checklist' gives a numbered 1-9 sequence that includes verification checkpoints ('Verify the default adapter and at least one non-Tailwind adapter with the conformance kit'), plus a preflight search step before building setup surfaces. It misses 5 because there are no explicit feedback loops for error recovery (no 'if the conformance run fails, do X').

Progressive Disclosure

The single file has clear, well-organized section headers and signals companion skills ('customizing-agent-native', 'agent-page', 'frontend-design'), but no bundle reference files exist and roughly a hundred lines of Settings page-id tables and prop contracts are inlined monolithically where a one-level-deep reference file would fit. Structure is present, so above 2, but content that should be separate is inline, below 4.

Specificity

"Inventory and ownership rules for shared Agent-Native workspace UI" names the domain precisely but lists only 1-2 abstract actions; it does not enumerate concrete capabilities such as deciding app-local vs. toolkit ownership or the concrete surfaces covered. It is above score 2 because the domain is exact rather than generic, but below score 4 because several specific actions are not listed.

Completeness

The description explicitly answers both parts: what ("Inventory and ownership rules for shared Agent-Native workspace UI") and when ("Use before building app chrome, settings, navigation, sharing, collaboration, setup, history, comments, chat rails, agent UX, or repeated workspace behavior") with a long list of concrete trigger phrases. Both are explicit and concrete, matching the top anchor.

Trigger Term Quality

"app chrome, settings, navigation, sharing, collaboration, setup, history, comments, chat rails, agent UX, or repeated workspace behavior" provides good natural-keyword coverage users would actually say. It falls short of 5 because some common synonyms and variations (e.g., permissions, members, notifications, onboarding) are missing.

Distinctiveness Conflict Risk

The niche is clear (shared Agent-Native workspace UI ownership), so the skill is mostly distinct, but broad trigger terms like "settings", "sharing", "comments", and "history" create minor overlap risk with the closely related skills this skill itself references. Minimal-conflict score 5 would require more uniquely-scoped triggers.