Conciseness

Dense, high-signal bullets with no filler or explanation of concepts Claude already knows (e.g., '取消 ≠ 撤销', '轮询冒充异步'). A few very long run-on bullets in 核心原则 and a redundant second description of `chapter6/async-agent/` in 配套代码 keep it at 'efficient; minor instances that could be trimmed' rather than the lean 5.

Actionability

Concrete design guidance throughout: named event types (`user.interrupt`, `tool.result`, `timer.trigger`), naming conventions (`initiate_phone_call` → `phone_call_connected` events), explicit markers ('[未处理事件 2/4]'), a five-rule sync-compat layer, and referenced functions (`runtime.py::AgentRuntime`, `_dispatcher`, `_handle_interrupt`). It stops short of anchor 5 because there is no copy-paste-ready code or command in the body — the executable material lives in `chapter6/` paths outside this bundle.

Workflow Clarity

实践模式 gives a clear build sequence (搭骨架 → 接事件源 → 分类器 → 兼容层 → ... → 验收三层) with explicit validation ('验收三层' plus '先跑离线 demo 验证运行时再上真实模型'). Not a 5 because the numbered list contains a numbering error (two items are both labeled '6', making 9 items read as 8) and some steps lack per-step checkpoints.

Progressive Disclosure

Well-organized sections with clearly signaled one-level-deep pointers in 配套代码 and 深度阅读 ('`chapter6/async-agent/agent_framework_design.md`（Flux 框架的运行时设计）'). Scored against the actual bundle: no references/, scripts/, or assets/ directories exist, so all referenced paths point outside the skill — a minor navigation gap that fits 'good structure; minor organization gaps' rather than the fully in-bundle 5.

Specificity

Lists multiple concrete capabilities: '构建异步/事件驱动 Agent', '响应外部事件（新邮件、webhook 回调、IM 消息、定时器、系统告警）', '处理工具执行期间的用户打断与多任务并发', and comprehensively enumerates coverage areas (event loop & safe points, three event-handling strategies, two native-async vs sync-compat routes, virtual identity, multi-channel recall). Matches the 'multiple specific concrete actions; comprehensive coverage' anchor; below it there is no anchor with equally complete coverage.

Completeness

Explicitly answers both questions: what ('构建异步/事件驱动 Agent...覆盖事件循环与安全点、三类事件触发工具...') and when ('...处理工具执行期间的用户打断与多任务并发时使用' plus a dedicated 触发词 line). Matches the top anchor with concrete trigger phrases; score 4 would require the 'when' clause to be less explicit.

Trigger Term Quality

The explicit trigger list covers natural terms with both Chinese and English synonyms: '异步 Agent、事件驱动、event-driven、webhook、定时器、心跳、任务句柄、打断、steering、并行工具执行'. This matches the 'comprehensive coverage including synonyms' anchor; a 4 would require notable missing natural terms, which is not the case.

Distinctiveness Conflict Risk

Clear niche (async/event-driven agent architecture) with distinct triggers like 'webhook、心跳、打断、steering、并行工具执行'. Minor overlap risk with general agent-orchestration or scheduling skills keeps it at the 'mostly distinct' anchor rather than the minimal-conflict 5.