Conciseness

The body is information-dense with genuine domain-specific contract knowledge (no padding with concepts Claude already knows), but the four-mode reportingMode contract is restated roughly five times across Step 2, the scenario guide, the constraints list, Step 5 prerequisites, the Quick Reference, and Common Mistakes, and inline changelog entries ("Phase AA 更新（2026-06-07）", "F128 portable policy (2026-08)") inject time-sensitive noise. Not 4 because the redundancy goes beyond minor trimming; not 2 because there is no filler or explanation of known concepts.

Actionability

Provides copy-paste-ready call templates with parameter semantics (cat_cafe_propose_thread with title/reason/preferredCats/projectPath/reportingMode, cross_post_message with the mandatory "## 主 Thread" header format), a mode-selection table with scenario guidance, naming conventions with examples, and concrete gotchas like proposalId-not-being-threadId. Covers the common cases fully; not 4 because the templates are complete and executable rather than having minor gaps.

Workflow Clarity

The five-step process (拆解 → 提议 → 选猫 → 并行执行 → 汇聚) is clearly sequenced with an upfront decision tree, explicit validation gates (user approval before thread creation, blocking-ack confirmation before commit, no-self-review rule, acceptance criteria per subtask), serial-dependency handling (A merges before B starts), and a Common Mistakes checklist. Not 4: validation checkpoints and error-recovery guidance are explicit rather than having minor gaps.

Progressive Disclosure

No bundle files exist, so all content is inline in a ~245-line SKILL.md. Structure is good: well-labeled sections, tables, a Quick Reference, and clearly named cross-skill pointers (tdd, quality-gate, request-review, merge-gate, cross-thread-sync). Not 5 because the reportingMode deep-dive (table + scenario guide + constraints, ~50 lines) and the projectPath ownership section are inlined in a monolithic file where a one-level-deep reference file would reduce load; not 3 because organization and navigation within the file are genuinely clear.

Specificity

Names the domain ("大任务的主动拆解与多 thread 并行编排") and lists several concrete actions in the Output clause ("子 thread 创建 + 选猫 + 各 thread 交付 + 主 thread 汇聚报告"), plus a concrete GOTCHA about projectPath semantics. Falls short of 5 because the actions are described at the deliverable level without naming the concrete operations involved, and exceeds 3 since more than 1-2 specific actions are given.

Completeness

Explicitly answers what ("主动拆解与多 thread 并行编排" with a concrete Output breakdown), when ("Use when: 任务涉及 2+ 个独立可交付子任务…不同 thread 并行推进"), and additionally when-not ("Not for: 单一任务…被动协调…subagent 并行…"). Both what and when are concrete and explicit, matching the top anchor; not 4 because the when-clause is fully specific rather than needing more detail.

Trigger Term Quality

The triggers field provides good natural-phrase coverage ("拆任务", "分 thread", "并行推进", "开多个 thread", "thread orchestration", "任务分解") that a user would plausibly say, and the Use-when clause adds concrete conditions ("任务涉及 2+ 个独立可交付子任务"). Not 5: common variations like "多任务", "同时推进", or plain "并行" are missing.

Distinctiveness Conflict Risk

The explicit "Not for" clause disambiguates against the nearest competing skills (cross-thread-sync for passive coordination, CLI built-in subagent parallelism, cross_post_message for existing threads), establishing a clear niche with minimal conflict risk. Not 4: the boundary guidance is more explicit than minor overlap risk — wrong-skill triggering is directly guarded against.