Conciseness

The body is dense and free of concept explanations Claude already knows, but it carries real duplication: the Policy D1 rationale is stated nearly verbatim in both Constants ("unresolved helper terminates with an explicit error") and Step 2 ("unresolved helper means the SKILL cannot produce its primary output — fail with explicit remediation"), and the ~17-line helper-resolution cascade in Step 2 is largely repeated for WIKI_SCRIPT in Step 6. This fits 'mostly efficient but includes some unnecessary explanation or could be tightened' rather than the 'minor instances' of a 4, and is far from the padded conceptual prose of a 2.

Actionability

Mostly executable: pip install, export of EXA_API_KEY, a copy-paste-ready resolution cascade with explicit remediation messages, and concrete `python3 "$EXA_FETCHER" search ... --content highlights` invocations with flags. It is not a 5 because the Step 6 block mixes English pseudocode with shell ("if [ -d research-wiki/ ] and query category was 'research paper':", "for each research-paper hit in results:"), so it is not copy-paste runnable; it is well above a 3 since everything else is real, complete code.

Workflow Clarity

A clearly sequenced six-step workflow with genuine checkpoints: Step 2's cascade validates helper resolution and exits with explicit fix instructions, Step 6 uses warn-and-skip with remediation, and Key Rules mandates checking EXA_API_KEY before searching. It stops short of a 5 because there is no explicit feedback loop for a failed search execution itself (e.g. API error, empty results) and Step 6 has no verification that wiki ingest succeeded — 'most checkpoints present; minor validation gaps'.

Progressive Disclosure

Structure is good and references are clearly signaled — [`shared-references/integration-contract.md`](...) §2 and [`shared-references/wiki-helper-resolution.md`](...) are one-level-deep, linked, and section-anchored — but the body re-inlines ~30 lines of resolution-cascade shell and policy text that the referenced contract documents, i.e. content that should live in the separate file appears inline. No references/, scripts/, or assets/ bundle exists in the skill directory to offset this. That places it at 'some structure, references present, but content that should be separate is inline', above the buried/unstructured level of 2 and below the clean split of 4.

Specificity

The description names the domain and two concrete actions — "AI-powered web search via Exa with content extraction" — which matches the anchor for 1-2 concrete actions without comprehensive coverage; capabilities like find-similar, domain/date filtering, and full-text/summary modes are absent. It is not a 4 because it does not list 'several specific actions', and not a 2 because the actions stated go beyond a bare domain mention.

Completeness

Both halves are explicit: the 'what' is "AI-powered web search via Exa with content extraction" and the 'when' is "Use when user says 'exa search', 'web search with content', 'find similar pages', or needs broad web results beyond academic databases" — concrete trigger phrases answering both questions directly. Not a 4, since the 'when' clause is already fully explicit rather than improvable.

Trigger Term Quality

Quoted natural phrases — "exa search", "web search with content", "find similar pages" — give good keyword coverage with tool-specific triggers. It falls short of the 5 anchor because common synonyms users would actually say (e.g. "search the web", "look this up online") and file-extension-style variations are missing, but it clearly exceeds the 'some relevant keywords' level of 3.

Distinctiveness Conflict Risk

The niche is clear and self-differentiating: the tool name "Exa" plus the explicit boundary "beyond academic databases (arXiv, Semantic Scholar)" steers triggers away from sibling search skills, matching the 'clear niche with distinct triggers; minimal conflict risk' anchor. It is not a 4 because the description already names the adjacent skills it should not absorb.