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2 - Projects/Smart Support/Phase 2 Dev Log.md

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+---
+created: 2026-04-06
+type: log
+project: "[[Smart Support]]"
+source: docs/phases/phase-2-dev-log.md
+tags:
+  - dev-log
+  - phase-2
+  - intent-classification
+  - discount-agent
+  - interrupt-ttl
+  - webhook-escalation
+  - templates
+---
+
+# Phase 2: Multi-Agent Routing + Safety -- Development Log
+
+> Status: COMPLETED
+> Phase branch: `phase-2/multi-agent-safety`
+> Date started: 2026-03-30
+> Date completed: 2026-03-30
+
+## What Was Built
+
+- **Intent Classification** (`app/intent.py`): LLM 结构化输出意图分类器，Pydantic 模型（IntentTarget, ClassificationResult）。支持单意图、多意图、模糊检测，可配置置信度阈值。
+- **Discount Agent** (`app/agents/discount.py`): Mock Agent，apply_discount（write + interrupt）和 generate_coupon（read）。验证折扣范围 1-100%。
+- **Interrupt Manager** (`app/interrupt_manager.py`): TTL 中断追踪，30 分钟自动过期。提供 register, check_status, resolve, cleanup_expired, generate_retry_prompt。
+- **Webhook Escalation** (`app/escalation.py`): HTTP POST 升级，指数退避重试（最多 3 次）。WebhookEscalator + NoOpEscalator，EscalationService Protocol。
+- **Enhanced Supervisor** (`app/graph.py`): 动态 Agent 描述 Supervisor 提示。意图分类器附加到 graph。多意图提示注入。
+- **Vertical Templates**: 三个行业 YAML 模板（电商、SaaS、金融科技）。
+- **Template Loading** (`app/registry.py`): load_template() 和 list_templates()。
+- **WebSocket Integration**: 模糊意图发送澄清消息。中断 TTL 检查 -- 过期中断返回重试提示。
+
+## Test Coverage
+
+- Total: 153 tests (Phase 1: 87 + Phase 2: 66)
+- Coverage: 90.18%
+- intent.py: 100% | discount.py: 96% | interrupt_manager.py: 100% | escalation.py: 100%
+
+## Related
+
+- [[Smart Support]]
+- [[Smart Support/Phase 2 - 多 Agent + 安全]]