Conciseness

Mostly efficient and command-focused, but with real duplication: the CI-detection snippet appears both in Mandatory First Steps ("echo \"CI env: ${CI:-not set}...\"") and again as a full if/else in "Detecting CI/CD Context"; the resolvePackageDependencies retry block is repeated verbatim in §3 and the CI/CD fixes; and the closing Scope section restates the mission. The dense axbuild prose paragraph ("Inspect command (native outcome) and collection (evidence completeness) separately...") also needs multiple readings. Not the 4 anchor because the repetition is more than 'minor instances of over-explanation'.

Actionability

Fully executable, copy-paste-ready bash throughout: pgrep with exit-code interpretation, jq JSON filters for simulator state, sed extraction of BUILD_DIR with a case guard scoping the rm -rf, mktemp-wrapped result-bundle capture, and a saved-log fallback. Placeholders like <ACTUAL_SCHEME_NAME> are explicitly paired with their discovery command (xcodebuild -list), and the error-pattern table maps concrete error strings to specific fixes, covering the common cases.

Workflow Clarity

"Your Mission" gives a numbered five-step sequence with an explicit verification step and an approval gate before destructive actions; the decision tree routes each symptom to a fix section; "When to Stop and Report" and Audit Guidelines (a 9-item checklist including "Verify fixes worked" and "If fix doesn't work - escalate") provide checkpoints and error-recovery feedback loops. Destructive operations are properly validated (ownership/state inspection, pgrep before every invocation, scoped-removal guard), so the destructive-cap at 3 does not apply.

Progressive Disclosure

No references/, scripts/, or assets/ bundle exists — 475 lines live in a single file. Section headers and § cross-references give it real structure, but reference-like content is inlined: the ~35-line simulator-runtime download catalogue, the error-pattern table, and six invocation examples clearly belong in separate files. This matches 'some structure but could be better organized; content that should be separate is inline' rather than the 4 anchor's 'most content is appropriately placed'.

Specificity

The description names a concrete domain ("Xcode build failures, build errors") but describes zero capabilities — it states only when to invoke the skill, never what it does. It is not entirely abstract like "Helps with documents", but it lists no actions, fitting 'names the domain but actions are minimal or generic' rather than the 3 anchor which requires 1-2 concrete actions.

Completeness

The 'when' is explicit ("Use when the user mentions Xcode build failures...") but the 'what' — what the skill actually does — is entirely absent; the 4 anchor requires both 'what' and 'when', and this description only delivers the 'when' half. This is exactly the 4 anchor's example pattern ('Extract text from PDFs and fill forms. Use when working with PDF files.') minus the capability statement.

Trigger Term Quality

Includes natural phrases users would say ("Xcode build failures", "build errors"), but misses common variations the body itself treats as red flags — "BUILD FAILED", "No such module", "won't compile", "tests failing with no code changes", "simulator stuck" — and "environment issues" is generic. Coverage is relevant but incomplete, matching 'some relevant keywords but missing common variations or synonyms' rather than the 4 anchor's 'good keyword coverage'.

Distinctiveness Conflict Risk

"Xcode build failures" carves a clear, distinct niche with minimal conflict risk against non-Xcode skills; however the trailing "environment issues" is broad enough to overlap with general environment/debugging skills. Mostly distinct with minor overlap risk fits the 4 anchor; it is not a 5 because of that generic trailing trigger.