Conciseness

The body is dense and operational with essentially no filler or explanation of concepts Claude already knows — feature flags, operations, and caveats are stated tersely. Minor trims are possible (the long enumeration of control types, dispatch guidance repeated between the preferred loop and the action-selection list), placing it at 'efficient; minor instances of over-explanation' rather than the every-token-earns-its-place 5.

Actionability

Fully executable guidance: complete JSON tool-call examples with real arguments, an enumerated operation list with exact semantics, specific fallback switches ('dispatch: "auto"' on `background_unavailable`), and exact error codes with required responses. Copy-paste ready and covers the common targeting cases.

Workflow Clarity

The numbered preferred loop includes explicit validation and feedback loops: fallback dispatch on `background_unavailable`, fresh snapshot on ambiguity or missing target before resorting to coordinates, mandatory stop-and-ask on session error codes, and required screenshot verification before claiming an outcome. Clear sequence with explicit validation steps and error-recovery loops.

Progressive Disclosure

The single file is well-sectioned (UIA Targeting, Session Caveats, Geometry), one level deep with no nested references, and navigation is easy. However, at roughly 110 lines everything is inlined — above the under-50-line threshold where a single file is unambiguously ideal — so it fits the 4 anchor's 'good structure; most content appropriately placed' rather than a 5.

Specificity

Names the domain (Windows backend for `computer_use_remote`) and 2-3 concrete coverage areas ('UIA structural targeting, Windows session caveats, and screenshot verification'), but describes topics rather than a comprehensive list of specific actions, fitting the 'names domain and 1-2 concrete actions' anchor. It is not a 4 because it never states executable actions like the anchor's 'extracts/fills/converts' pattern.

Completeness

Explicitly answers both: what ('Backend-specific Windows guidance for `computer_use_remote`... Covers UIA structural targeting, Windows session caveats, and screenshot verification') and when ('Load after `status` or `start_session` reports backend_family/backend_id `windows` or Windows UI Automation features') with concrete trigger phrases. Matches the 5 anchor; the 'when' clause is more explicit than the 4 anchor's example.

Trigger Term Quality

Good natural keyword coverage — 'Windows', 'UI Automation', 'UIA', 'backend', 'computer_use_remote', 'screenshot' — tied to the concrete load mechanism ('Load after `status` or `start_session` reports backend_family/backend_id `windows`'). A few natural terms a user might say (RDP, remote desktop, title bar) are absent, so it fits the 4 anchor rather than the comprehensive 5.

Distinctiveness Conflict Risk

Clearly niched to the Windows backend of a single tool with explicit trigger conditions, and the body further excludes Linux, macOS, Xpra, Docker, and browser-only tasks. Minimal overlap risk with other skills, matching the 5 anchor.