Conciseness

The body is dense with non-obvious operational knowledge (repo-binding pitfalls, staleness semantics, relationTypes filtering, "Omitted references are not absent references") and explains nothing Claude already knows. It is not a 5 because repo-binding and index-freshness guidance is repeated across three sections ('Bind the repository first', the checklist, and the example) and could be consolidated.

Actionability

Concrete, mostly copy-paste-ready calls with parameters and sample outputs for query, context, trace, cypher, and list_repos, plus a runnable terminal command (`node .gitnexus/run.cjs analyze`). It is not a 5 because of minor gaps: `trace` is shown with `from_uid`/`to_uid` in one place and `from`/`to` in another (inconsistent parameter names), and `detect_changes` is mentioned in a table without any call example.

Workflow Clarity

Clear numbered sequence (steps 0–4) mirrored by a checklist and a fully worked example, with explicit validation checkpoints (confirm root cause in source/tests, preserve UNKNOWN/partial warnings, state repo and index freshness), a feedback loop (staleness → re-analyze → retry with precise re-analysis conditions 'behind'/'diverged'), and a stop-and-ask rule for ambiguity. This matches the top anchor: explicit validation, error recovery, and a checklist.

Progressive Disclosure

The skill is self-contained with well-organized, clearly headed sections (When to Use, Bind, Workflow, Checklist, Focus, Patterns, Tools, Example) and no buried or nested references — no references/, scripts/, or assets/ bundle files exist. It is not a 5 because at ~150 lines the per-tool parameter documentation (e.g., the trace semantics and filtered-context options) is substantial enough that it could be split into a one-level-deep reference file to slim the overview.

Specificity

The description names the debugging domain ("debugging a bug, tracing an error, or asking why something fails") but lists no concrete capabilities — it never states what the skill actually does (e.g., GitNexus code-graph root-cause tracing, querying callers/callees). This matches the anchor 'Names the domain but actions are minimal or generic'; it is not a 3 because there is no explicit list of 1-2 concrete actions the skill performs.

Completeness

The 'when' is explicit and well done ("Use when the user is debugging a bug, tracing an error...") with concrete trigger phrases, but the 'what' is only weakly implied — the description never states what the skill does or how (code-graph based root-cause analysis via GitNexus). This mirrors the incompleteness of the score-3 anchor (one half clear, the other missing/weak), and is not a 4 because the 'what' is absent rather than merely imprecise.

Trigger Term Quality

Strong natural phrases users would actually say: "debugging", "bug", "tracing an error", plus directly quoted example utterances ("Why is X failing?", "Where does this error come from?", "Trace this bug"). It falls short of a 5 because common synonyms like "crash", "exception", "stack trace", "root cause", or "regression" are missing.

Distinctiveness Conflict Risk

The debugging triggers are somewhat specific ("Trace this bug", "Where does this error come from?") but the description omits anything distinctive about the skill's approach, so it would compete with any generic or language-specific debugging skill. It fits 'Somewhat specific but could still overlap with similar skills'; not a 4 because nothing in the text distinguishes it from closely related debugging skills.