Conciseness

Lean and efficient: every sentence carries project-specific facts Claude cannot know (project id, filter format 'X.Y.Z (versionCode)', 'hand-built strings silently match nothing', historical fix ids), with zero concept explanation or padding. Version numbers (29321034, 2.7.14) sit under an explicit 'Historical patterns' framing rather than loose time-sensitive claims, so they avoid the penalty.

Actionability

Concrete guidance throughout — 'Call crashlytics_get_report for topVersions with NO filter', 'crashlytics_get_report topIssues filtered to the exact display name', 'gh release list', dispatch 'in a single message', a defined verdict-table schema — but the exact argument shape for crashlytics_get_report (how report type and filter are passed) is never shown, leaving a minor executable gap. Not 3: the guidance is executable in substance, not pseudocode; not 5: a copy-paste-ready call example is missing.

Workflow Clarity

A clearly numbered 4-step sequence with explicit validation ('Each investigator must verify the crashing versionCode against the fix's release before reporting "known-fixed-residual"') and an error-recovery path ('If Firebase MCP auth fails, repair the local Firebase MCP authentication'). Not 4: both checkpoints and failure handling are explicit, and the read-only batch fan-out has its verification step stated.

Progressive Disclosure

Under 50 lines with no external references needed (no references/, scripts/, or assets/ exist), organized into four well-labeled sections that each carry a distinct stage of the workflow. Per the rubric's simple-skill exception, well-organized sections alone earn the top anchor here.

Specificity

Lists multiple concrete actions — 'establish the right version filter (topVersions first, then topIssues filtered to "X.Y.Z (versionCode)")', 'fan out one crash-investigator subagent per top issue in parallel', 'return a distilled verdict table' — covering the workflow comprehensively in third-person voice. Not 4: there are no minor gaps in action coverage; the full sweep workflow plus the single-issue exception path are all named.

Completeness

Explicitly answers both: 'what' (version filter → topIssues → parallel fan-out → verdict table) and 'when' ('Use for "what's crashing", "triage Crashlytics", or "is build NNNN healthy" sweeps'), with concrete trigger phrases and an explicit boundary case (single known issue id → dispatch crash-investigator directly). Not 4: the 'when' clause is already explicit and trigger-phrase-based.

Trigger Term Quality

Includes natural trigger phrases users would actually say — 'what's crashing', 'triage Crashlytics', 'is build NNNN healthy' — plus domain terms (Firebase Crashlytics, Meshtastic-Android). Not 5: common synonyms and variations such as 'crash report', 'crash log', or 'stack trace' are absent.

Distinctiveness Conflict Risk

Occupies a clear niche (Firebase Crashlytics triage for a specific app) with distinct triggers, and negative guidance ('for a single known issue id, dispatch crash-investigator directly instead') prevents mis-triggering. Not 4: overlap risk with adjacent skills is minimal because the backend and workflow are uniquely named.