Conciseness

The routing tables, ordering rules, and probe command are lean and assume Claude's competence, but the "Migration flag" and "Styling-depth flag" paragraphs (~550 words combined) restate detail that belongs in sendbird-migration.md and design-matching.md (e.g., the §3.5 gap-handling protocol, composite-slot traps, region checklists). This fits "mostly efficient but includes some unnecessary explanation or could be tightened"; not 2 because the padding is confined to two sections rather than being pervasive.

Actionability

For a router-style instruction skill, the guidance is fully executable: a copy-paste-ready bash probe command, an exact decision table mapping input signals to tracks, explicit once-per-session and skip rules, a verbatim disambiguation question, and a concrete recovery rule ("If a track A/B/D task reaches code work and credentials haven't been collected yet, return to credentials.md"). Specific direction covers the common cases.

Workflow Clarity

The sequence is explicit and enforced (Step 0 classifier -> Step 0.5 credentials -> project signals -> track phases A1-A4/B1-B4) with named verification checkpoints ("Confirm Gradle sync, ChatClient lifetime, auth, and first rendered screen") and a build/compare/iterate loop in the styling flag. Not 5 because the verify phases describe what to confirm without any concrete check command or failure-recovery guidance, leaving validation somewhat implicit.

Progressive Disclosure

The router pattern is good in principle - one-level-deep, clearly signaled links to references/ files that all exist (CHAT-COMPOSE.md, DOCS.md, etc.) with a documented naming scheme - but scoring against the actual bundle, eight-plus referenced paths (RULES.md, builder.md, sdk.md, credentials.md, ai-integration.md, design-matching.md, sendbird-migration.md, integration-review.md, ../stream/ai-backend-contract.md) are not present, and substantial content that belongs in those files is inlined in the migration/styling flag sections. Not 4 because dangling referenced paths plus inlined detail exceed "minor organization gaps".

Specificity

The description lists multiple concrete actions ("Build, integrate, and review", "Stream package setup, auth and token wiring, screen blueprints, read-only integration reviews", "video calling flows (joining/starting calls, ringing, custom call controls and participant tiles)") with comprehensive coverage across Chat, Video, Feeds, and AI surfaces. It matches the anchor for multiple specific concrete actions with comprehensive coverage; no notable action gaps.

Completeness

It explicitly answers both questions: the "what" is "Build, integrate, and review Stream Chat, Video, and Feeds in Android apps" and the "when" is the explicit "Use for Jetpack Compose, Android Studio, and Gradle project work - including..." clause with concrete trigger phrases. This mirrors the anchor 5 example structure.

Trigger Term Quality

It covers natural user phrasings and synonyms extensively: "Jetpack Compose, Android Studio, and Gradle", "ChatGPT-style apps", "streaming replies", "thinking indicators", "stop generating", "ringing", "deep links", "push routing", "theming", "notification feed", "stories", plus SDK tokens like "stream-chat-android-ai-compose". Coverage of natural terms including synonyms matches the top anchor.

Distinctiveness Conflict Risk

The Stream/Android SDK niche is distinct with specific triggers (Stream Chat/Video/Feeds, stream-chat-android-ai-compose), but "Use for Jetpack Compose, Android Studio, and Gradle project work" is not qualified by Stream intent and could fire on generic Android/Compose requests, creating minor overlap with general Android skills. Not 5 because of that broad trigger clause; not 3 because the overall niche and triggers are clearly distinct from neighboring skills.