Conciseness

The body is dense, imperative, and almost entirely repo-specific ("Use the existing mutation queue and history mechanisms", "HOVERABLE_CLASS_NAME and hoverableStyle()", "changing motion blur from one sample to four and back must preserve the surviving sample's subtree") with no tutorial padding or explanation of general concepts beyond one motivating sentence. It assumes Claude's competence throughout, matching the 'every token earns its place' anchor.

Actionability

Guidance is concrete and executable throughout: named helpers and files ("observeHover()", "ActionTooltip.tsx", "imperative-state.ts"), exact commands ("bunx turbo run make --filter='@remotion/studio'"), a named regression test, and a specified measurement protocol (baseline capture, comparable composition/viewport/repetitions). For an instruction/review skill this is fully actionable with no gaps.

Workflow Clarity

"Verify the feature" gives a clear verification sequence — exercise edits through the UI and code, exercise WebMCP, check "immediate feedback, persistence after HMR, failure recovery, and undo/redo", mode availability, then run explicit build/lint/test validation commands. The performance section adds a baseline-repeat-compare loop ending in "resolve regressions before finishing", matching the explicit-checkpoint anchor.

Progressive Disclosure

Well-organized single-file checklist with clear section headers and clearly signaled one-level references to sibling skills ("Read [studio-mode](../studio-mode/SKILL.md) when deciding availability"). However, all content is inline in one ~175-line file — the four-mode table and hover/CSS-reset detail could live in reference files — and the referenced paths point outside the bundle (no references/ directory exists), so it matches anchor 4 rather than the split-content anchor 5.

Specificity

"Develop or review Remotion Studio features and UI" plus six enumerated concrete areas ("optimistic updates, agent access through code or WebMCP, iframe-safe hover behavior, design consistency, mode availability, and performance verification") lists several specific capabilities. It is not 5 because the action verbs stay generic ("Apply Studio principles for...") rather than naming distinct concrete actions per area, and not 3 because coverage goes well beyond 1-2 actions.

Completeness

The 'what' is clear and specific ("Develop or review Remotion Studio features and UI. Apply Studio principles for..."), but there is no "Use when..." clause or equivalent explicit trigger guidance, which per the judging guidelines caps completeness at 3. Not 4 because the 'when' is entirely absent rather than merely imprecise; not 2 because the 'what' is unambiguous.

Trigger Term Quality

Natural domain terms are present: "Remotion Studio", "review", "UI", "optimistic updates", "WebMCP", "hover", "performance". A few natural terms are missing — notably "remotion.new" (a key surface named only in the body) and variations like "Studio UI" — so it matches anchor 4 rather than 5, and exceeds anchor 3's 'some relevant keywords'.

Distinctiveness Conflict Risk

"Remotion Studio" is a highly specific niche, so wrong-skill triggering is unlikely — but sibling skills covering subsets (studio-perf, studio-mode, studio-css-reset) create minor overlap risk with closely related skills, matching anchor 4 rather than the minimal-conflict anchor 5.