The body is dense and assumes Claude's competence — no padding about what Lark/Feishu is or what a webhook is; every section (ready-marker contract, stdin-EOF behavior, kill -9 warning, jq schema decoding gotchas) is non-obvious domain-specific operational knowledge that earns its place. Not score 2 because there is no generic concept explanation that could be trimmed.

Commands are concrete and copy-paste ready — `lark-cli event consume im.message.receive_v1 --max-events 1 --timeout 30s --as bot`, the multi-process `> receive.ndjson &` / `wait` example, and a real JSON schema snippet. Not score 2 because examples are fully executable rather than pseudocode with missing details.

A numbered call flow (list → schema → consume) plus explicit checkpoints and feedback loops: the stderr ready-marker synchronization line, the exit-code/reason table, and error-envelope parsing ("Parse error.type/error.subtype to branch... error.hint for the recovery action"). Not capped at 2 because validation/error-recovery feedback is present for the streaming subscription operation.

The SKILL.md is an overview with a topic-index table pointing to seven verified one-level-deep reference files (application, approval, IM, task, VC, minutes, whiteboard), each clearly signaled with a link and coverage description; per-topic catalogs are appropriately split out. Scored against the actual bundle structure — all seven referenced paths exist in ./references/.

Lists multiple concrete actions and event types — "stream events as NDJSON via lark-cli event consume", "IM messages/reactions/chat changes, Approval status changes, Task updates, VC meeting started/joined/ended, Minutes generated, Whiteboard updated". This exceeds the score-2 bar of naming a domain and some actions by being comprehensive across event categories.

Both what (stream events as NDJSON via consume, covering listed event categories) and when are explicit — "Use for Lark bots, real-time message processing, long-running subscribers, streaming webhook/push handlers" is an explicit trigger clause, satisfying the rule that a missing 'Use when/Use for' clause caps completeness at 2.

Natural user-facing terms are well covered: "Lark/Feishu real-time event listening / subscribing / consuming", "Lark bots, real-time message processing, long-running subscribers, streaming webhook/push handlers". These are phrases a user would plausibly say, not just internal jargon, so it clears the score-2 'missing common variations' bar.

Clear niche — Lark/Feishu real-time event consumption via a lark-cli subprocess contract with bounded runs and a stderr ready marker — with distinct triggers unlikely to fire for unrelated skills. Not score 2 because the niche and triggers are specific rather than merely 'somewhat specific'.