Conciseness

Every sentence carries non-obvious operational detail — permission ownership ("the Codewhale Computer Use app when `request_access` says `via: \"app\"`, else the terminal"), platform unavailability ("installing ffmpeg does not enable it"), and raster-ID lifecycle rules — with no explanation of concepts Claude already knows. The body is lean and every token earns its place.

Actionability

Guidance names exact tools with their parameters (`recording_start` with `display`, `region`, `fps`, `durationSec`, `intervalMs`; `screenshot` returning `raster_id` feeding `zoom`) and error tokens (`raster_stale`, `no_raster`) with recovery actions. It falls short of anchor 5 only because no literal example invocation or payload is shown for the common case, leaving a minor gap.

Workflow Clarity

The five-step sequence (pick computer → check `request_access` → start → work → `recording_stop` → list/status) is explicit, with validation checkpoints ("Check `request_access` when readiness is unknown") and error-recovery feedback loops ("On `raster_stale` or `no_raster`, observe again; never drop the ID to retry"; denial → "tell the user which, do not retry"). Capture operations are non-destructive, so no batch-validation cap applies.

Progressive Disclosure

The body is 33 lines with no bundle files and no need for external references; it is organized into a clear workflow section, platform truths, and a screenshot-semantics section, fitting the simple-skill exception for scoring 5. Navigation within the short single file is unambiguous, so it does not sit between anchors 4 and 5.

Specificity

The description lists multiple concrete actions — "Capture screenshots on registered computers", "record on macOS or HarmonyOS", "manage saved captures", "Probe capabilities before recording" — covering the skill's full capability range with no padding. This matches the anchor for multiple specific concrete actions with comprehensive coverage; a 4 would require minor coverage gaps, but screenshots, recording, capture management, and capability probing are all named.

Completeness

The "what" is explicit and concrete, but there is no "Use when..." clause or equivalent trigger guidance; "Probe capabilities before recording" is operational instruction, not a statement of when to invoke the skill. Per the judging guideline, a missing trigger clause caps completeness at 3.

Trigger Term Quality

Natural terms like "screenshots", "record", "captures", "macOS", and "HarmonyOS" are present, but common user phrasings such as "screen recording", "video", "screen capture", and file extensions like ".mov" are missing. Good keyword coverage with a few natural terms absent fits anchor 4; anchor 5 would require synonyms and extensions.

Distinctiveness Conflict Risk

"Registered computers", "macOS or HarmonyOS", and "saved captures" carve a fairly distinct niche with platform-specific anchors, but the generic screenshot capability could overlap a general screenshot tool. Mostly distinct with minor overlap risk fits anchor 4; the niche is clear enough to sit above anchor 3.