Conciseness

The body is lean and operational — it adds process knowledge Claude does not have (the six gates, MECE synthesis, hedge ladder) without explaining known concepts; a few atmospheric overview lines keep it just above the level-2 verbosity floor but every section earns its place.

Actionability

Gives concrete, executable procedural guidance — "Generate three to five search perspectives" with five enumerated perspectives, a six-gate table with severities and failure routes, and specific RQ-conversion examples — not the vague level-1 or pseudocode level-2 case.

Workflow Clarity

Clear sequence (Step 0 freeze brief → Phase 1 scout/verify → Phase 2 synthesize → gates → presentation) with explicit validation checkpoints (CRITICAL/MAJOR severities) and a feedback loop ("Iterate until every gate is CLEAR"), matching the level-3 anchor with error-recovery routes.

Progressive Disclosure

SKILL.md is an operational overview pointing to seven one-level-deep references (quality-gates, search-strategy, citation-protocol, synthesis-framework, self-adversarial, output-structure, hedge-calibration), all verified to exist and clearly signaled; no scripts or assets are needed, matching the well-split level-3 anchor.

Specificity

Lists multiple specific concrete actions — "freezes research questions, searches from multiple adversarial perspectives, verifies every citation, synthesizes evidence into a MECE taxonomy with in-sentence cross-comparison, and answers the research questions" — matching the top anchor; it is not a vague domain-only statement (level 2) nor abstract (level 1).

Completeness

Clearly answers both what it does (the survey-grade investigation pipeline) and when to use it (explicit "Use when..." clause), matching the level-3 anchor; it is not missing the when trigger (which would cap it at 2).

Trigger Term Quality

"Use when the user asks for a literature review, a survey of a field, research landscape mapping, or a deep dive into what is known about a topic" gives good coverage of natural terms users would say; voice is third person ("Runs"), not level 2 which would lack common variations.

Distinctiveness Conflict Risk

It carves a clear literature-review/survey niche with distinct triggers unlikely to fire for the wrong skill; it is not the generic level-1 or the overlapping level-2 case.