Conciseness

Every line carries non-generic craft knowledge — word budgets per duration ("6s | 12-18 | 4-8 words"), VO pace ("140-160 wpm"), 9:16 UI safe zones ("top 15% and bottom 25% of frame"), and hook-rate benchmarks. Nothing explains concepts Claude already knows, and the one-line thesis ("A video ad is won or lost in the first 3 seconds") sets priorities without padding. This matches the lean, every-token-earns-its-place anchor.

Actionability

Guidance is fully executable for an instruction-only skill: exact second-by-second structures per format ("Hook (0-3s) → product + benefit named before the skip button (3-5s) → demo (5-10s)"), a word-count table that fits the clock, a copy-paste beat template with VISUAL/VO/SUPER, ranked hook techniques, and named tools ("Select existing advertiser assets with `list_creative_assets`"). Not score 4 because there are no meaningful gaps in executing the common cases.

Workflow Clarity

A clear five-step sequence (Define the brief → Fit the format → Write with timing marks → Optimize the hook → Produce and ship) with explicit feedback loops: kill losing hooks "once each has enough impressions to judge, then iterate new hooks against the winner", and post-launch review with the guardrail "do not infer hook retention from clicks". A closing Rules checklist and the "Confirm final asset IDs and campaign scope" checkpoint complete it. This is a generative, non-destructive skill, so the validation cap does not apply.

Progressive Disclosure

A compact (~58 line) single-file skill that needs no external files: all content is core working knowledge appropriately kept inline, organized under numbered section headers, a table, and an example block. Cross-references to companion skills (**creative-testing**, **kill-scale-rules**, **launch**) are clearly signaled and one level deep. This matches the well-organized single-file case rather than the anchor below it, which requires inlined content that clearly belongs in separate files.

Specificity

The description names one primary concrete action — "Write platform-specific video ad scripts with second-by-second timing marks" — with the platform list (YouTube bumpers and pre-roll, TikTok native, Reels, 30s narrative ads) qualifying scope rather than adding distinct actions. This matches the anchor for naming the domain with 1-2 concrete actions but not comprehensive coverage; it falls short of the next anchor, which requires several separate actions (e.g., extract, fill, merge, convert).

Completeness

It clearly answers both questions: the "what" is explicit ("Write platform-specific video ad scripts with second-by-second timing marks" plus enumerated formats) and the "when" is an explicit "Use when..." clause with four concrete trigger phrases. This matches the top anchor's structure; it is not score 4 because the trigger guidance is already explicit and specific rather than needing more detail.

Trigger Term Quality

"Use when writing video scripts, storyboarding an ad, improving hook rates, or briefing video generation" provides good natural-phrase coverage a user would plausibly say. It falls between anchor 3 and 5: common variations like "ad script", "commercial script", or "video ad copy" are missing, matching the anchor for good coverage with a few natural terms missing.

Distinctiveness Conflict Risk

The video-ad-scripting niche is distinct with format-specific triggers, but "improving hook rates" and "briefing video generation" could plausibly fire for a general ad-optimization or video-production skill. This fits "mostly distinct; minor overlap risk with closely related skills" rather than the minimal-conflict top anchor.