Conciseness

The body is lean and every token carries non-obvious, project-specific information — e.g., 'allTests covers KMP modules (where bare test silently skips)', 'the PostToolUse hook usually already did this; running it again is a no-op if so', and 'keep the multi-thousand-line log out of context'. It assumes Claude's competence with no padding, matching the score-5 anchor.

Actionability

All guidance is copy-paste executable: the ANDROID_HOME bootstrap one-liner, 'git diff --name-only HEAD && git diff --cached --name-only', './gradlew spotlessApply spotlessCheck detekt detektTypeResolved assembleDebug test allTests', and 'git restore --source=HEAD --staged --worktree -- docs/assets/screenshots/'. Conditional additions (kmpSmokeCompile, -PwarningsAsErrors=true, sort-strings) are precisely specified, matching the fully-executable score-5 anchor.

Workflow Clarity

A clearly sequenced 5-step process with an explicit validation checkpoint (step 4: 'After it returns, confirm the only changes are yours' via 'git status --short') and feedback loops for error recovery ('treat its PASS as suspect and re-run the failing task inline', 'Do not push on FAIL'). The destructive/batch validation cap does not apply since verification steps are present, so it matches the score-5 anchor.

Progressive Disclosure

The body is well under 50 lines with clean numbered section headers (Bootstrap, Decide the command, Run it, Verify, Report) and needs no external reference files — matching the rubric's guideline that sub-50-line simple skills with well-organized sections score 5. No bundle files exist to verify, and none are needed.

Specificity

The description enumerates concrete actions end-to-end: 'bootstrap, then spotlessApply/spotlessCheck/detekt/detektTypeResolved/assembleDebug/test/allTests (plus kmpSmokeCompile and sort-strings when relevant) via the gradle-runner subagent, restore the host-render screenshot diff, and report a single pass/fail'. This matches the anchor for multiple specific concrete actions with comprehensive coverage, not the score-4 anchor which expects minor gaps in coverage.

Completeness

It explicitly answers what ('Run the mandatory pre-push baseline verification... bootstrap, then [task chain]... restore the host-render screenshot diff, and report a single pass/fail') and when ('Use before every push') with concrete trigger phrasing, matching the score-5 anchor. It is not score 4 because the 'when' clause is explicit rather than under-specified.

Trigger Term Quality

Natural phrases users would say are present — 'pre-push', 'Use before every push', 'This is the check CI fails on when skipped' — giving good keyword coverage. A few natural terms/variations are missing (e.g., 'verify', 'lint', 'before pushing'), which matches the score-4 anchor rather than the comprehensive synonym coverage of score 5.

Distinctiveness Conflict Risk

The description names its niche unambiguously — 'the mandatory pre-push baseline verification for Meshtastic-Android' with named gradle tasks and the gradle-runner subagent — leaving minimal conflict risk with other skills. It clearly fits the 'clear niche with distinct triggers' anchor.