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a207-router-mcp

by ayeyouok

a207-router-mcp(M13 · 意图路由与安全闸)

调度 Agent 独占的确定性判定层。安全红线不交给概率模型:P0 危急词、三条互斥硬规则 (MX-1/MX-2/MX-3)、权限矩阵,全部落成可单测的纯函数。

  • 技术栈:FastMCP ≥2.0 + pydantic ≥2 + Python 3.13,stdio 传输

  • 依据:docs/01_多智能体与MCP总体需求梳理_v1.md §5/§6/§7、docs/02_Wave1_构建规格_v1.md §2.1

  • 零跨包引用:不 import 任何其他 a207-* 包,入参由调度 Agent 从 PCP 取值后显式传入

包结构

src/a207_router_mcp/
  core.py          安全闸 + 意图分类(纯逻辑,无 fastmcp)
  permissions.py   权限矩阵执行点 + 写工具识别(MX-3 落点)
  constants.py     角色、13 个 MCP 登记表、权限矩阵、写权策略
  lexicon.py       P0 危急词、分期词族、意图路由表、槽位词典
  slots.py         正则抽槽位
  models.py        pydantic 请求/响应模型
  server.py        FastMCP 实例,挂载四个工具
tests/test_tools.py  46 个断言,纯 python 可跑

Related MCP server: NORNR MCP Control

四个工具

check_safety_gate(intent, caller, target_mcp="")

判定顺序固定:P0 危急词 → 入参登记校验 → MX-1 → MX-2 → MX-3 → 权限矩阵兜底

返回:{allow, reason, applied_rule, gate, delegate_to, requires_confirmation, matched_keywords}

  • applied_ruleMX-1 | MX-2 | MX-3 | none

  • gateP0_EMERGENCY | INPUT | MX | PERMISSION_MATRIX | PASS,用于区分同为 none 的拒绝来源

规则

内容

P0

命中危急词(抽搐/少尿/无尿/大量出血/意识不清等 30 余条)即断崖终止,不进入任何业务 MCP

MX-1

分期/eGFR/几期/肾小球滤过/PEW/生长障碍/血压百分位类问题,caller 为 nutritionist 或 parent_assistant 时拒绝并 delegate_to=doctor_assistanta207-ckd-clinical-calc-mcp 对非 doctor_assistant 一律关闭

MX-2

a207-gamification-mcp 只接受 child_companion;child_companion 调 HIS/LIS/营养计算/临床计算/食谱/风险/报告/通知一律拒绝

MX-3

写工具 → 允许 caller:upsert_lab_result→doctor_assistant;upsert_food_diary→parent_assistant/child_companion;log_meal_checkinaward_badge→child_companion;push_to_emr→doctor_assistant(requires_confirmation=true);notify_*/trigger_warning_event/close_warning→risk_warning。工具与 target_mcp 不匹配同样拒绝

intent 可传用户原文,也可直接传工具名;中文写入说法(写回病历、录入化验、打卡等)已登记别名,避免绕过 MX-3。

classify_intent(text)

规则命中优先,未命中返回 intent="unknown"fallback="llm",由上层软分类后再过一次安全闸

返回:{intent, mcp, slots, confidence, allowed_callers, matched_keywords, candidates, fallback, note}

intent

目标 MCP

允许 caller

emergency_red_flag

a207-router-mcp

全部(强制前置,fallback=halt

patient_profile

a207-his-mcp

调度/医生/营养师(RL)/家长(RL)/风险预警

clinical_staging

a207-ckd-clinical-calc-mcp

仅 doctor_assistant

lab_result

a207-lis-mcp

医生/家长(受限视图)/风险预警

nutrition_calc

a207-nutrition-calc-mcp

医生/营养师/家长

meal_plan

a207-meal-plan-mcp

医生/营养师

risk_assessment

a207-risk-rules-mcp

医生/风险预警

nutrition_assessment

a207-nutrition-assessment-mcp

见权限矩阵,写入按 MX-3

gamification

a207-gamification-mcp

仅 child_companion

notify

a207-notify-mcp

仅 risk_warning 可写

report

a207-report-mcp

医生/营养师/家长(RL)/风险预警

knowledge

a207-knowledge-mcp

全部,按角色切语料

followup

a207-followup-mcp

医生/营养师/风险预警

打分口径:命中关键词长度求和,同分按优先级(P0→P5)取胜;confidence = min(0.95, 0.50 + 0.05 × 分数)。 "排食谱/一周食谱/三餐怎么安排"路由到 M7;裸词"食谱"按构建规格 §2.1 归 M5,由调用方结合上下文决定是否转交。

check_permission(caller, mcp, action="read")

需求文档 §7 权限矩阵的执行点。action 可传 read/write,也可直接传工具名。

返回:{allow, access, resolved_action, reason, write_tool, requires_confirmation, limited_view}

  • access 为矩阵原始格子:R / RL / R/W / -limited_view=true 表示只能给受限视图

  • 精度说明:命中已登记写工具时,MX-3 映射优先于矩阵格子(v1.2 已用 MX-3 收口写入路径), 因此 parent_assistant + a207-nutrition-assessment-mcp + upsert_food_diary 放行,其余读操作仍按矩阵为 -

extract_slots(text)

正则 + 词典抽槽位,抽不到留空,绝不猜测。

返回:{patient_id, food[], analyte[], date[], number[], age_years, weight_kg, height_cm, time_window_days, meal, measure[]}

  • patient_id 匹配 PCP 契约 ^P[0-9]{4,}$

  • analyte 归一到 PCP 字段名(potassium / phosphorus / scr / albumin / hemoglobin …),单位口径以 contracts/pcp-schema.json 为准:Scr μmol/L,K/P/Ca mmol/L,能量 kcal,蛋白 g,身高 cm,体重 kg

  • number 保留原始单位;斤自动折算 kg,月龄自动折算岁

验证

python -m py_compile src/a207_router_mcp/*.py
python tests/test_tools.py     # total=46 passed=46 failed=0

单测覆盖:MX-1/MX-2/MX-3 越权拒绝与正常放行、P0 断崖、未登记 caller/MCP、矩阵兜底、 意图路由 8 例、权限矩阵 6 组、槽位抽取 6 例,另含"无跨 a207 包引用 + 纯逻辑层不依赖 fastmcp"的静态自查。

启动(需先安装 fastmcp):fastmcp dev src/a207_router_mcp/server.pypython -m a207_router_mcp.server

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