Conciseness

Efficient and command-first — sections like Setup, Workflow, and Zoom convey non-obvious operational knowledge ('Re-screenshot after every UI change: coordinates go stale when the screen changes') with no concept explanations Claude already knows. Minor trimmable duplication: the 'Click a button' scenario repeats the Workflow example verbatim, and the Providers table restates the Setup switch variants — anchor 4, not 5 because a few tokens don't earn their place; not 3 because the padding is minor.

Actionability

Every section consists of copy-paste-ready `cua` commands with concrete arguments and coordinates (e.g., 'cua do click 400 200 && cua do type "Jane Doe"', 'cua do zoom "Google Chrome"'), and the Quick Reference table gives exact syntax per action. Fully executable guidance covering the common cases — anchor 5.

Workflow Clarity

The core process is an explicit named loop — 'Look → Act → Verify: repeat until done' — with an explicit checkpoint rule ('Re-screenshot after every UI change: coordinates go stale when the screen changes') serving as error-recovery feedback, and every scenario ends with a verification screenshot. The zoom scenario even sequences restore steps ('cua do unzoom ... cua do screenshot'). Matches anchor 5's clear sequence with validation and feedback; not 4 because checkpoints are explicit, not implicit.

Progressive Disclosure

The body is a well-sectioned overview (Setup, Workflow, Scenarios, Quick Reference) with the bulk argument syntax correctly split into the real one-level-deep bundle file, clearly signaled at the end: 'See [references/command-reference.md](references/command-reference.md) for full argument syntax' — and that file exists and delivers the promised full command/argument reference. Easy navigation, no nested references — anchor 5.

Specificity

Lists seven-plus concrete actions ('test buttons, fill forms, verify visual layouts, fuzz web pages, automate user flows, take screenshots, or perform end-to-end QA') plus supported environments and the install command, which is comprehensive (anchor 5); however, the second-person phrasing 'Use when you need to visually interact with a GUI' incurs the rubric's 1-point voice penalty, dropping it to 4. It is not a 3 because the action coverage goes well beyond 1-2 actions.

Completeness

Explicitly answers 'when' ('Use when you need to visually interact with a GUI') and 'what' (the enumerated concrete actions) with concrete trigger phrases, and adds scope ('Works on cloud VMs, Docker containers, local machines, and sandboxes') and the dependency ('Needs the `cua` CLI'). Matches anchor 5 exactly; not a 4 because neither what nor when is vague or implicit.

Trigger Term Quality

Natural user phrasings are comprehensively covered — 'test buttons', 'fill forms', 'fuzz web pages', 'automate user flows', 'take screenshots', 'end-to-end QA' — anchored by the domain term 'GUI'. These match what a user would actually say when needing this skill, fitting the anchor-5 comprehensive-coverage example; nothing significant is missing.

Distinctiveness Conflict Risk

Has a clear niche (visual GUI interaction that complements shell/API automation), but 'take screenshots' and 'fuzz web pages' have minor overlap risk with screenshot-annotation and web-testing skills. Mostly distinct with minor overlap — anchor 4; not 5 because a couple of triggers could plausibly activate closely related skills.