Conciseness

The body is almost entirely non-generic guidance — "Never classify intent with code", "omission preserves; missing, empty, unknown, and cleared are four different things", "If you can't say in one sentence what an agent is responsible for, split it" — with no explanation of concepts Claude already knows and no padding. Not a 4 because there is no section that reads as trimmable over-explanation; even the OSS/Cloud paragraph resolves a real ambiguity.

Actionability

Concrete directive guidance throughout: named env vars ("LIVEKIT_URL, LIVEKIT_API_KEY, LIVEKIT_API_SECRET"), a numbered pre-code checklist, and specific rules like "Validate *structure* in code (typed dates, enums, required fields); leave *meaning* to the model". Not a 5 because, as an instruction-only skill, it contains no executable code or commands — though it deliberately and explicitly delegates API specifics to reading-livekit-docs, which the rubric's scoring note partially excuses. Not a 3 because the guidance is concrete and executable in its decisions, not pseudocode-level hints.

Workflow Clarity

A clear sequence with explicit validation checkpoints: "Before you write code" (load docs, confirm credentials, decide structure, plan verification), then "Start with a failing complete-path test" with a guard-pairing feedback loop ("a test that rejects everything proves nothing about the guard"; "Keep that pair green while you add everything else"), and staged verification tiers (while building / before done / before shipping). Not a 4 because checkpoints are explicit at every stage rather than having minor gaps.

Progressive Disclosure

SKILL.md is a well-organized overview with one clearly signaled, one-level-deep reference — "The full treatment... is in `references/state-and-effects.md`. Read it before building anything that books, edits, confirms, or ends calls" — and the file exists in the bundle with substantive content (134 lines). A "Related skills" section maps each sibling skill to its role. Not a 4 because navigation is unambiguous and the split (overview here, deep treatment in the reference) is exactly appropriate.

Specificity

"Builds voice and chat AI agents with LiveKit Agents and LiveKit Cloud", "implement handoffs", "splitting a monolithic agent into handoffs and tasks", "keeping the model in charge of meaning while code owns state, approvals, and effects" — multiple specific concrete actions covering the skill's full scope, matching the comprehensive-coverage anchor. Not a 4 because coverage is complete across architecture, state, and verification rather than having minor gaps.

Completeness

Explicitly answers what ("Builds voice and chat AI agents... Covers architecture: designing for latency, keeping context small...") and when ("Use when the user asks to...") with concrete quoted trigger phrases, exactly matching the anchor-5 example. Not a 4 because the 'when' clause is fully explicit with multiple concrete triggers, not merely present.

Trigger Term Quality

Natural user phrasings are quoted verbatim: "build a voice agent", "create a LiveKit agent", "add voice AI to my app", "my agent is slow / too chatty", "it says it booked but nothing was saved", "make it confirm before committing", "it keeps re-asking things the caller already said" — this covers symptom complaints users actually say, not just task requests. Not a 4 because synonym and failure-mode coverage is thorough, with no obvious missing natural terms.

Distinctiveness Conflict Risk

"LiveKit Agents and LiveKit Cloud" names a clear niche with distinct triggers, and routing to siblings is explicit ("For API specifics use reading-livekit-docs. To check behavior use debugging-livekit-agents and testing-livekit-agents"), which actively reduces conflict with related skills. Not a 4 because the domain name plus explicit delegation leaves minimal overlap risk.