Conciseness

The same HeyGen POST /v1/workflows/executions call is demonstrated at least five times (Overview curl, Execute curl, Usage Examples x3) and in three languages (curl, TypeScript, Python), and ~200 lines of REST API reference are inlined that an agent with mcp__heygen__* tools never needs. Marketing prose like 'ranks #1 on Artificial Analysis Elo as of early 2026' and 'the only model in the fleet with single-pass native synchronized audio, multi-shot generation, director-level camera control, and lip-sync from quoted dialogue' pads further. This matches 'noticeably verbose; several unnecessary explanations or padded sections' rather than anchor 3's 'some unnecessary explanation'.

Actionability

The HeyGen path is fully executable (complete curl/TypeScript/Python with polling, error handling for failed/not_found, and timeout), but the mandated entry point is not actionable at all: 'Always use video_selector instead of calling provider tools directly' is stated with zero documentation of video_selector's inputs or outputs, and 'See Layer 3 gemini-omni / seedance-2-0 for the authoritative prompting guide' points to files that do not exist in the bundle. Key details for the primary instruction are missing, which fits anchor 3 ('concrete guidance but incomplete') better than anchor 4's 'minor gaps'.

Workflow Clarity

The HeyGen sequence is clear (submit → execution_id → poll every 10s → video_url, with failed/not_found handling), but the skill's core multi-gateway decision flow is contradictory and unresolved: 'Do not describe any gateway as the default or top choice without checking the registry' (registry never defined) versus 'Preferred premium default — Seedance 2.0' versus the provider table's 'veo_3_1 (default, highest quality)', and the Default Workflow never integrates the mandated video_selector step. Sequence present but the actual decision checkpoints are missing or implicit, matching anchor 3; it does not reach anchor 4's coherent mostly-checkpointed flow.

Progressive Disclosure

No references/, scripts/, or assets/ directories exist, yet the body twice directs the agent to 'Layer 3' guides (gemini-omni, seedance-2-0) for authoritative material — broken navigation. Meanwhile ~200 lines of HeyGen API reference that clearly belong in a separate file are inlined in SKILL.md. This matches anchor 2 ('content that clearly belongs in separate files is inlined; or references are buried/broken') despite the presence of section headers, because the only file-level references in the skill point to nonexistent files.

Specificity

Concrete actions are named: 'Generate AI videos from text prompts', 'Image-to-video generation with a reference image', and 'Choosing between video generation providers', with seven specific provider names. It falls short of anchor 5 because items (1) and (2) largely duplicate each other and a capability the body emphasizes heavily — iterative/conversational editing of existing clips via Gemini Omni — is omitted from the action coverage.

Completeness

Explicitly answers both questions: 'what' via 'Generate AI videos from text prompts using multiple provider gateways' and 'when' via an enumerated 'Use when: (1)...(2)...(3)...(4)' clause with concrete trigger phrases, matching the anchor-5 example pattern.

Trigger Term Quality

Comprehensive natural-term coverage: 'AI videos', 'video clips', 'text prompts', 'image-to-video', 'video generation', plus seven provider names (VEO, Kling, Sora, Runway, Seedance, MiniMax, Gemini Omni) users would naturally say when needing this skill. Not below anchor 4 — no meaningful natural synonym or trigger phrasing is missing for this domain.

Distinctiveness Conflict Risk

Clear niche (AI video generation) with distinct triggers including seven named providers and four named gateways, making it unlikely to fire for unrelated skills. Minor risk only from overlapping with a hypothetical single-provider video skill, which the explicit gateway list already disambiguates.