Conciseness

The body is mostly efficient but contains clear duplication that could be tightened: depth guidance appears in both Quick Start ('Default to depth=quick... Use depth=standard... Use depth=deep_report') and Workflow step 2 ('Use quick... Use standard... Use focused... Reserve deep_report'); source routing repeats between 'web-first orientation. Only escalate to OpenAlex / Semantic Scholar' (Quick Start) and Workflow step 3; and 'Method-critical defaults' restates workflow ideas ('Literature grounding is not a default-on behavior', 'not the default replacement for ordinary web search'). This fits anchor 3 ('mostly efficient but includes some unnecessary explanation or could be tightened') rather than anchor 4, since multiple passages are redundant rather than minor.

Actionability

As an instruction-only skill, the guidance is concrete and executable: it names the tool (run_literature_research), its parameters (query, topic), the depth enum (quick/standard/focused/deep_report), an escalation condition ('when paper metadata, citations, DOI/year/venue details... are actually needed' / 'when the web pass is too weak'), and a defined output pack. Minor gaps remain — no example invocation and the Output Contract ('a short summary, a small key-paper set, citations/links, confidence, and follow-up questions') has no format example — so it fits anchor 4 rather than anchor 5.

Workflow Clarity

The Workflow section presents four clearly sequenced steps (decide whether literature is needed → choose smallest useful depth → route sources conservatively → keep the pack clean) with a decision checkpoint in step 3 ('Start with public web... Use OpenAlex / Semantic Scholar when... the web pass is too weak'). There is no explicit validation of returned results and no error-recovery loop, so it matches anchor 4 ('clear sequence with most checkpoints present; minor validation gaps') rather than anchor 5. The destructive/batch cap does not apply since this is non-destructive research work.

Progressive Disclosure

This is a single-file skill (no references/, scripts/, or assets/ directories exist; 'catalysis-prior-art-and-benchmarking' in the References section is a cross-skill pointer, not a bundle path). The body is 43 lines — under the 50-line threshold — and is organized into clean sections (Overview, Quick Start, Suggested tools, Workflow, Method-critical defaults, Output Contract, References) with no content that needs splitting into external files. Per the rubric's simple-skill exception, this earns a 5.

Specificity

The description names the domain ('papers, prior work, literature support, benchmark conventions, or other explicit evidence grounding from published work') but states no concrete skill actions — it never says what the skill actually does (e.g., run literature research, return a citation pack). This matches anchor 2 ('names the domain but actions are minimal or generic'); anchor 3 would require 1–2 explicitly stated capabilities, which are absent.

Completeness

The 'when' is fully explicit with concrete trigger phrases ('Use this skill when the user asks for papers, prior work, literature support, benchmark conventions...'), so the missing-trigger cap does not apply. The 'what' is only implied ('evidence grounding from published work') rather than explicitly stating the skill's operation or output — both present but the 'what' is weak, matching anchor 4 rather than anchor 5.

Trigger Term Quality

Trigger phrases 'papers', 'prior work', 'literature support', 'benchmark conventions', and 'published work' are natural terms users would say when needing this skill. Coverage is good but misses common synonyms such as 'citations', 'related work', and 'academic sources', so it fits anchor 4 rather than anchor 5's comprehensive synonym coverage.

Distinctiveness Conflict Risk

The published-work grounding niche ('papers, prior work, evidence grounding from published work') is clearly distinct from ordinary web search skills. Minor overlap risk remains with general research or benchmarking skills via the phrase 'benchmark conventions', fitting anchor 4 rather than anchor 5's minimal conflict risk.