The body is terse, table-driven instruction with no padding about what pentesting or SQLite is; it assumes Claude's competence and every section earns its place, though minor redundancy exists between the primitives table and the writing-conventions section.

It names concrete tools, fact_key formats, link types, and confidence values, but provides no worked example of an actual tool invocation showing argument shapes (e.g. a full upsert_project_fact call with a links array), leaving the most concrete 'copy-paste ready' tier unreached.

The '强制节奏' section gives a clearly numbered sequence with explicit validation checkpoints ('验证后再 confirmed / record_vulnerability', '搜完才继续'), feedback loops (tentative→verify→deprecate), and per-step checklists in the behavior triggers.

It is well-organized into clear sections but is a single ~100-line self-contained file with no bundle files in references/scripts/assets and no offloading of detail; the under-50-line 'simple skill' exception for a 3 does not apply.

Names multiple concrete actions — 'upsert_project_fact/record_vulnerability', '关系边 links', 'confidence', '多代理协调落库' — rather than vague language, matching the 'lists multiple specific concrete actions' anchor.

It answers both 'what' (Fact graph, upsert/record tools, edges, confidence, multi-agent coordination) and 'when' via the explicit 'Use when managing project facts, blackboard index, writing evidence...' clause.

The 'Use when managing project facts, blackboard index, writing evidence, or avoiding context-loss after compression' clause gives some natural triggers, but the bulk of the description is dense internal jargon ('Fact 图', '落库', 'confidence') that users would not naturally say, so it falls short of full coverage.

It occupies a clear niche (pentest project blackboard / cross-session Fact graph) with distinct triggers unlikely to fire for unrelated skills.