Conciseness

Every line is operational — per-format clock structures, a word-budget table, "Voiceover pace 140-160 wpm", "top 15% and bottom 25% of frame", hook-rate thresholds — with zero space spent explaining concepts Claude already knows. Lean throughout, matching the 5 anchor; nothing identifiable to trim for 4.

Actionability

For an instruction-only skill the guidance is fully executable: beat-by-beat structures per format ("hero visual (0-0.5s) → benefit + super (0.5-3.5s) → ..."), word budgets, a concrete example beat block, ranked hook techniques, and safe-zone percentages. Per the rubric's code-vs-instruction note, the absence of code is not penalized when guidance is this specific, so it reaches the 5 anchor.

Workflow Clarity

Numbered sections 1-5 give a clear brief → format → write → hook → ship sequence, with a genuine feedback loop ("kill the losers once each has enough impressions to judge, then iterate new hooks against the winner") and the "Confirm final asset IDs and campaign scope" checkpoint. It falls short of 5 only for minor gaps: no explicit verification of the script itself (e.g., checking the VO draft against the word-budget table) and produce/ship steps that defer to other skills without inline fallbacks.

Progressive Disclosure

The skill is compact (~59 lines), self-contained, and cleanly sectioned, with no bundle files and none needed; cross-skill pointers (**creative-testing**, **kill-scale-rules**, **launch**) are bolded, clearly signaled, and one level deep. Under the simple-skill note, well-organized sections alone justify the 5 anchor here.

Specificity

"Write platform-specific video ad scripts with second-by-second timing marks" names a concrete action, and the enumeration "YouTube bumpers and pre-roll, TikTok native, Reels, and 30s narrative ads" comprehensively covers the skill's formats with no vague filler. Coverage is comprehensive rather than leaving minor gaps, matching the 5 anchor over the 4.

Completeness

The description states both what it does (platform-specific scripts with second-by-second timing marks, formats enumerated) and an explicit "Use when..." clause with concrete trigger phrases, exactly matching the 5 anchor pattern. Not 4, since the 'when' is explicit and specific rather than improvable.

Trigger Term Quality

"writing video scripts", "storyboarding an ad", "improving hook rates", and "briefing video generation" are phrases a user would naturally say, but common variants like "commercial" or "ad copy" are missing. Good coverage with a few natural terms absent fits the 4 anchor, short of the 5 anchor's comprehensive synonym coverage.

Distinctiveness Conflict Risk

Video ad scripting is a clear niche with distinct triggers like "improving hook rates", but "writing video scripts" and "briefing video generation" carry minor overlap risk with generic scriptwriting or video-generation skills. Mostly distinct with minor overlap fits 4 rather than 5's minimal-conflict standard.