Conciseness

The body is mostly lean with concrete, earning examples (made-up method names, framework-twin pairs) that justify their tokens, but retains some editorializing ("confident garbage", "One comment costs nothing. A silent wrong call costs an hour") that could be trimmed, so it sits at anchor 4 rather than 5.

Actionability

Provides concrete, executable guidance — an inline-comment annotation pattern with a real snippet (fs.openAsBlob), a verbatim user-question prompt, and a what-to-do-instead anti-pattern table — with only minor gaps versus fully copy-paste-ready programs.

Workflow Clarity

The four-step workflow (identify, verify, flag, prefer verbose-correct) is a clear sequence with an implicit checkpoint (ask once if no version stated), and the single-rule nature fits the simple-skill exception; it lacks an explicit validate-then-fix feedback loop, keeping it at 4.

Progressive Disclosure

A self-contained, single-purpose skill with no bundle files and clean sectioning (Overview, The Only Rule, What This Blocks, Workflow, Anti-Patterns, Cross-References); the simple-skill exception allows 5 for well-organized sections with no need for external references.

Specificity

Names the domain and concrete objects ("calling methods, imports, or variables that do not provably exist") but is essentially a single preventive action rather than a list of several specific actions, so it sits at the anchor-3 level rather than 4.

Completeness

Explicitly answers both questions with a concrete "Use when the user says..." trigger clause and a clear "Prevents the agent from calling..." what clause, matching the anchor-5 example structure.

Trigger Term Quality

Four natural trigger phrases users would actually say ("no hallucinations", "verify APIs", "reality check", "don't invent functions") give good keyword coverage, just short of the comprehensive synonym/file-extension variety of anchor 5.

Distinctiveness Conflict Risk

The triggers carve a clear API-verification niche, but the goal overlaps with closely related hallucination-prevention skills (acknowledged in the body's cross-references), so minor overlap risk keeps it at 4 rather than 5.