feat(workflow #874): NodeRegistry 统一工作流节点抽象 + 双 Claw 事件对齐
#874 P3 工作流引擎 NodeRegistry 统一(加速带「工具即节点」思想落地,零源码拷贝重写): - app/core/node_registry.py(新增):把 skill / MCP / Agent / DAG 四套割裂表达收敛为 单一 Node 抽象。BaseNode(Protocol) 定义 node_type/name/input_schema/output_schema/ risk_level + async run(ctx);NodeContext 携带 db/tenant_id/claw_type/trace_id/黑板/emit; NodeResult.to_blackboard() 与既有 orchestrator 黑板结构无缝互转。内建八型节点 llm/reduce/local/external/agent/skill/mcp/loop,均继承 NodeBase 公共生命周期 (发 start 步骤 -> 执行 -> ok/fail 覆盖同 index),异常统一归一为 NodeError(带结构化 diagnosis)。SkillNode 用 asyncio.to_thread 包裹同步执行器避免阻塞事件循环; LoopNode 硬限流 20 次迭代 / 并发上限 5,子节点经 ctx.child() 复用同一 StepCounter 与 emit,保证步骤序号全图唯一。CapabilitySnapshot 统一承载 skills/mcp_servers/agents/ function_definitions/mcp_tool_map,供 _build_system_prompt、run_graph、yaml 校验三处 共用同一份能力真相。normalize_claw() 将 im_wechat/im_platform 归一为 "im",避免 Grafana 维度碎片化。 - app/core/capability_discovery.py:新增 discover_agents(),与 discover_skills 同构的 三级降级策略(显式安装 -> published 兜底 -> rank_by_query 裁剪),补齐 Agent 维度的 统一能力发现,杜绝各处内联第二份发现逻辑(#866 回退事故教训)。 - app/core/orchestrator.py:VALID_NODE_TYPES 与 validate_graph 改为运行期读 registry.node_types()/requires_agent(),注册表成为节点类型的单一真相源;_run_node 改为 拼装 NodeContext 后委托 registry.get(ntype).run(ctx),本体只保留调度与拓扑;run_graph 新增 on_event/claw_type/tenant_id/snapshot 参数,编排全过程以统一 EngineEvent 下发。 - app/core/yaml_workflow.py:valid_node_types() 实时读注册表;validate_yaml 补 skill/mcp/ loop 必填校验;yaml_to_orchestration / orchestration_to_yaml 双向透传节点扩展字段 (label/skill_id/func_name/tool/server_id/args/body/items/split/max_iterations/ concurrency/join),修复配置往返丢字段。 - app/core/engine_event.py:make_step 新增 node 参数,以 step["node"]={id,type,label} 承载节点身份。设计书原文的 EngineEvent(kind="node") 与前端仅识别 thinking/skill/mcp/ agent/kb/media 的现状冲突(未知 kind 会被静默丢帧),故映射为已知 kind + 附加字段, 线格式对旧前端字节兼容。 - app/api/chat_service.py:Web Claw 编排调用点透传 on_event/claw_type/tenant_id, 租户与通道标签复用 #875 的 ContextVar(get_route_ctx),不再新增一层参数透传。 IM Claw 经 EngineCore 自动继承同一事件流(单引擎原则,im_llm.py 零改动)。 - tests/test_node_registry.py(新增):R-NODE-1~11 确定性哨兵,无网络无外部依赖。守卫 内建八型齐全、注册表为单一真相源(orchestrator 与 yaml 校验实时同源)、describe 契约、 双 Claw 事件对齐(SseAdapter 与 BufferAdapter 逐键相等且均带 node 身份)、claw 归一与 tenant 标签、新节点必填校验、YAML 往返不吞字段、Loop 限流聚合、失败结构化诊断两端可见、 禁止第二份能力发现、register 拒绝非法节点。 验证:容器内 py_compile 全通过;pytest tests/ 退出码 0(85 项 = 83 passed + 2 skipped, 0 FAILED/ERROR),含 R-NODE 16 项与 R-DUAL 双 Claw 哨兵。 safe-align: 仅复制 7 个 git-tracked 文件,未触碰 secrets/.venv/node_modules/dist/caches。 本地提交不 push。
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@@ -28,7 +28,9 @@
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--------------------------------
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CAP_SKILL_LIMIT 单轮注入技能数上限,默认 12
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CAP_MCP_LIMIT 单轮注入 MCP 服务数上限,默认 8
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CAP_AGENT_LIMIT 单轮可见 Agent 数上限,默认 6
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CAP_SKILL_FALLBACK_PUBLISHED 安装表为空时是否降级为 published,默认 开
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CAP_AGENT_FALLBACK_PUBLISHED Agent 同上,默认 开
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CAP_MCP_AUTO 未显式指定时是否自动挂载已启用 MCP,默认 开
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"""
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@@ -44,6 +46,7 @@ logger = logging.getLogger(__name__)
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__all__ = [
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"discover_skills",
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"discover_mcp_servers",
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"discover_agents",
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"build_mcp_tool_defs",
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"rank_by_query",
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]
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@@ -226,6 +229,97 @@ def discover_mcp_servers(
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return out
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# --------------------------------------------------------------------------
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# Agent 发现(#874:画布节点候选 / IM `/flow` 可选清单)
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# --------------------------------------------------------------------------
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def discover_agents(
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db,
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user_id: str | None,
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query: str = "",
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explicit_ids: Iterable[str] | None = None,
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limit: int | None = None,
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claw: str = "web",
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) -> list:
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"""发现当前请求可用的智能体(双 Claw 共用),策略与 discover_skills 同构。
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返回 `_resolve_market_agents` 的结构:
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[{id, name, role_prompt, instructions, skill_ids, knowledge_base_ids,
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model_id, tools, description, tool_policy, platform, agent_endpoint,
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agent_api_key, orchestration}]
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用途定位:给 NodeRegistry 生成 agent 型节点候选、给 IM `/flow` 列可选智能体。
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若要拿它往 system prompt 里注入,请自行收窄 limit —— 多个 Agent 人格叠加会串味。
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"""
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limit = limit if limit is not None else _env_int("CAP_AGENT_LIMIT", 6)
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if limit <= 0:
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return []
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from app.api.chat_skill import _resolve_market_agents
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from app.models import AppInstallation, MarketApp
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# 0) 显式指定(Web Claw 勾选 / 画布已引用)—— 不做相关性裁剪,用户意愿最高
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ids = [i for i in (explicit_ids or []) if i]
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if ids:
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out = _resolve_market_agents(db, ids, user_id or "")
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logger.info("[cap] agents claw=%s source=explicit picked=%d", claw, len(out))
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return out
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pool: list = []
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source = "empty"
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# 1) 用户显式安装
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if user_id:
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try:
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app_ids = [
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i.app_id
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for i in db.query(AppInstallation)
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.filter(AppInstallation.user_id == user_id)
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.all()
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]
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if app_ids:
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aids = [
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a.id
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for a in db.query(MarketApp)
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.filter(
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MarketApp.id.in_(app_ids),
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MarketApp.type == "agent",
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MarketApp.status == "published",
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)
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.all()
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]
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if aids:
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pool = _resolve_market_agents(db, aids, user_id)
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source = "installed"
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except Exception as e:
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logger.warning("[cap] 安装 Agent 发现失败(降级继续): %s", e)
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# 2) 降级:平台已发布全集
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if not pool and _env_flag("CAP_AGENT_FALLBACK_PUBLISHED", True):
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try:
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aids = [
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a.id
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for a in db.query(MarketApp)
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.filter(MarketApp.type == "agent", MarketApp.status == "published")
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.all()
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]
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if aids:
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pool = _resolve_market_agents(db, aids, user_id or "")
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source = "published"
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except Exception as e:
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logger.warning("[cap] published Agent 发现失败: %s", e)
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# 3) 预算裁剪
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picked = rank_by_query(pool, query, limit)
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logger.info(
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"[cap] agents claw=%s source=%s pool=%d picked=%d",
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claw,
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source,
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len(pool),
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len(picked),
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)
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return picked
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# --------------------------------------------------------------------------
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# MCP → function definitions
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# --------------------------------------------------------------------------
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