Conciseness

The body is short, but the "Do not use this skill when" section ("The task is unrelated to hybrid search implementation", "You need a different domain or tool outside this scope") is empty boilerplate, and Instructions bullets like "Apply relevant best practices and validate outcomes" are filler that should be tightened or cut. Not 4 because two whole sections carry no domain-specific information.

Actionability

The Instructions are high-level hints ("Clarify goals, constraints, and required inputs", "Apply relevant best practices") with no concrete steps, code, or named techniques (no fusion method, no BM25/vector setup, no weighting). Matches the 'minimal concrete guidance' anchor; not 1 only because the use-case bullets and playbook pointer give minimal shape, though the pointer targets a nonexistent file.

Workflow Clarity

No real workflow is sequenced: generic imperatives with no concrete steps, no validation checkpoints, and no error-recovery loop. Not 1 because the bullets imply a rough order (clarify → apply → verify), but that rough sequence has major gaps, matching the anchor for a rough sequence with poorly defined steps and absent validation.

Progressive Disclosure

Sections are clearly labeled and the reference "If detailed examples are required, open `resources/implementation-playbook.md`" is well signaled, but that file does not exist — there is no `resources/` directory or any bundle files, so the sole path to detailed content is broken. Navigation to the actual substance fails, matching the minimal-structure anchor rather than 3, where a working but poorly organized reference would land.

Specificity

"Combine vector and keyword search for improved retrieval" names the domain plus essentially one concrete action (combining approaches for retrieval), matching the anchor for 1-2 concrete actions without comprehensive coverage. It is not 4 because it does not list several specific, distinct actions.

Completeness

It explicitly answers both what ("Combine vector and keyword search for improved retrieval") and when ("Use when implementing RAG systems, building search engines, or when neither approach alone provides sufficient recall") with concrete trigger phrases, matching the top anchor exactly. It is clearly not 4 because the 'when' clause is explicit and specific rather than improvable.

Trigger Term Quality

Natural triggers like "RAG systems", "building search engines", and "recall" are present, giving good keyword coverage. Not 5 because common variations users would say — "hybrid search", "semantic search", "BM25" — are missing.

Distinctiveness Conflict Risk

The hybrid-retrieval niche ("neither approach alone provides sufficient recall") is mostly distinct, but "implementing RAG systems" and "building search engines" could overlap with pure-RAG or general search-engine skills. Matches the 'mostly distinct; minor overlap risk' anchor rather than the minimal-conflict anchor 5.