Conciseness

The body is lean and assumes Claude's competence: it contains no conceptual explanations, only commands and channel-specific facts Claude could not know (marker mappings, the upstream remote, merge branch, and the exact test count). Every token earns its place, matching the lean-and-efficient anchor.

Actionability

Fully executable throughout: copy-paste bash/git/npm commands for every step, a concrete spot-check prompt that elicits formatted output, a TypeScript import example for the Signal integration, and both macOS (launchctl) and Linux (systemctl) restart variants. This matches the copy-paste-ready anchor at 5.

Workflow Clarity

The three-phase sequence is explicit with strong checkpoints: an idempotency pre-flight ('test -f src/text-styles.ts'), a validation gate ('All 73 tests should pass and the build should be clean before continuing'), merge-conflict recovery guidance, and a verify phase with rebuild, live spot-check, and log inspection. This matches the clear-sequence-with-explicit-validation and error-recovery anchor at 5.

Progressive Disclosure

Sections are clearly organized with no external files needed, and each phase is well signaled. The minor gap keeping it below 5 is that the Signal Skill Integration section inlines API-reference detail (the return shape and the signal-cli '"start:length:STYLE"' JSON-RPC parameter format) for another skill's consumption — content that would sit better in a signaled reference file if the bundle grows. It is well above the some-structure level of 3.

Specificity

Lists several concrete actions with named artifacts ('Convert Claude's Markdown output to each channel's native text syntax', 'zero-dependency formatting for WhatsApp, Telegram, and Slack (marker substitution)', 'Signal rich-text helper (parseSignalStyles)'), but coverage has minor gaps — Discord passthrough and the actual marker transformations are not mentioned, so it falls short of the comprehensive anchor at 5 while clearly exceeding the 1-2-action level of 3.

Completeness

The 'what' is clear and concrete (channel-native Markdown conversion plus a Signal helper), but there is no 'Use when...' clause or any equivalent explicit trigger guidance, which the rubric guidelines cap at 3. It cannot score 4 because the 'when' is not even weakly implied.

Trigger Term Quality

Good natural keyword coverage including 'Markdown', 'formatting', and the channel names 'WhatsApp', 'Telegram', 'Slack', and 'Signal'. A few natural terms users would say are missing ('bold', 'italics', 'message formatting', 'rich text'), which keeps it below the comprehensive-synonym coverage of 5 but comfortably above the partial coverage of 3.

Distinctiveness Conflict Risk

A clear niche (per-channel outbound text formatting) with distinct channel-name triggers, so it is unlikely to fire for the wrong skill. Minor overlap risk remains with closely related skills — it explicitly states the helper is 'used by the Signal skill' — placing it at the mostly-distinct anchor rather than the minimal-conflict anchor at 5.