470 lines
22 KiB
TypeScript
470 lines
22 KiB
TypeScript
/**
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* 应用服务：会话与任务编排、能力查询、事件推送（架构设计第 2 节）。
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*
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* 它持有会话与业务记录，但不做业务规则、不替引擎判断。
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* A1 阶段用内存实现；A3.7 换成持久层后接口保持不变。
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*/
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import { randomBytes } from 'node:crypto';
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import { PROTOCOL_VERSION, type CapabilitiesResponse, type CancelResponse, type CreateSessionRequest, type CreateSessionResponse, type HealthResponse, type MeResponse, type PlatformEvent, type ProjectListResponse, type SendMessageRequest, type SendMessageResponse, type SessionDetailResponse, type SessionListResponse, type ApprovalDecisionRequest, type ApprovalDecisionResponse, type ExecutionTraceResponse } from '@aps/contracts';
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import { CapabilityRegistry } from '../core/registry/registry.js';
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import { createCore, type Core, type InvokeRequest } from '../core/execution/invoke.js';
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import { createControlPlane, type ControlPlane } from '../core/control-plane/control-plane.js';
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import { IdentityContext } from '../core/identity/context.js';
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import { CredentialBroker } from '../core/credentials/broker.js';
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import { PendingActionStore } from '../core/approval/store.js';
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import { AuditLog } from '../core/audit/log.js';
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import { createFakeRuntime } from '../agent/fake-runtime.js';
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import type { AgentRuntime, RuntimeSession } from '../agent/runtime.js';
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import { createRulePlanner, plannerToFakeTurn } from '../agent/rule-planner.js';
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import { toToolDescriptors } from '../agent/tools.js';
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import { RuntimeSupervisor, type SupervisorOptions } from '../agent/process-manager.js';
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import type { SessionRepository } from '../core/storage/sessions.js';
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import {
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capabilityFingerprint,
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isCapabilityVisible,
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visibleCapabilities,
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type CapabilityVisibility,
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} from '../core/registry/visibility.js';
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import { runTurn } from './turn-runner.js';
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import { buildContext, type ContextBudget } from './context-builder.js';
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import type { ContextRepository } from '../core/storage/context.js';
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import { PLATFORM_SYSTEM_PROMPT } from './system-prompt.js';
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import type { Provider } from '@aps/provider-sdk';
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import { AppError, badRequest, conflict } from './errors.js';
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import { ProjectStore } from './projects.js';
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import { newId, SessionStore, type SessionRecord } from './sessions.js';
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import type { Subject } from './subject.js';
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export interface ApplicationServiceOptions {
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version?: string;
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/** 引擎实现：默认是假引擎（A3.3 起可换成 Pi 子进程） */
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runtime?: AgentRuntime;
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/** 会话持久化（A3.7）：不传则纯内存，测试与临时运行用 */
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sessionRepository?: SessionRepository;
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/** 能力可见性规则（A3.5）：不传则开发期默认全部可见 */
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capabilityVisibility?: CapabilityVisibility;
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/** 上下文检查点（A3.8）：不传则不落检查点 */
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contextRepository?: ContextRepository;
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/** 上下文预算覆盖（测试用） */
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contextBudget?: Partial<ContextBudget>;
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/** 引擎进程管理（A3.10）：不传则用默认值自建 */
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supervisor?: RuntimeSupervisor;
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/** 进程管理参数覆盖（测试用） */
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supervisorOptions?: Partial<SupervisorOptions>;
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/** A4 控制面：五块（身份、策略、凭据、确认、审计）绑在一起的入口；不传则用内存实现自建 */
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controlPlane?: ControlPlane;
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/** 单独覆盖控制面的某一块（落库版由 server/index.ts 注入） */
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identity?: IdentityContext;
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credentials?: CredentialBroker;
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approvals?: PendingActionStore;
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audit?: AuditLog;
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/** 确认卡有效期（测试用） */
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approvalTtlMs?: number;
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}
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export class ApplicationService {
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private readonly projects = new ProjectStore();
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private readonly sessions: SessionStore;
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private readonly version: string;
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/** 能力目录与执行入口：能力清单来自这里，执行只有一个出口 */
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readonly registry = new CapabilityRegistry();
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readonly core: Core;
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private readonly runtime: AgentRuntime;
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private readonly visibility: CapabilityVisibility;
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private readonly contextRepository: ContextRepository | undefined;
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private readonly contextBudget: Partial<ContextBudget> | undefined;
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/** 已经注入过上下文的运行时会话：同一运行时会话只注入一次（它自己有原生上下文） */
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private readonly injectedRuntimeSessions = new Set<string>();
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/** 每个平台会话一个运行时会话（ADR-0006：首版一进程一会话） */
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/** 引擎进程管理：空闲回收、并发上限、崩溃退避重启（A3.10） */
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readonly supervisor: RuntimeSupervisor;
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/** A4 控制面：策略、身份、凭据、确认、审计的入口 */
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readonly controlPlane: ControlPlane;
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constructor(options: ApplicationServiceOptions = {}) {
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this.version = options.version ?? '0.1.0';
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this.sessions = new SessionStore(options.sessionRepository);
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this.visibility = options.capabilityVisibility ?? { defaultAllow: true, denyWrite: false, grants: [] };
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this.contextRepository = options.contextRepository;
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this.contextBudget = options.contextBudget;
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this.supervisor = options.supervisor ?? new RuntimeSupervisor(options.supervisorOptions ?? {});
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this.controlPlane =
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options.controlPlane ??
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createControlPlane({
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identity: options.identity ?? new IdentityContext(),
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credentials: options.credentials ?? new CredentialBroker({ masterKey: randomBytes(32) }),
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approvals: options.approvals ?? new PendingActionStore(),
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audit: options.audit ?? new AuditLog(),
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isVisible: (capability, subject) => isCapabilityVisible(capability, this.visibility, subject),
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...(options.approvalTtlMs === undefined ? {} : { approvalTtlMs: options.approvalTtlMs }),
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});
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this.core = createCore({ registry: this.registry, controlPlane: this.controlPlane });
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this.runtime = options.runtime ?? createFakeRuntime({ planner: plannerToFakeTurn(createRulePlanner()) });
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}
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/** 注册 Provider（A5 接入 APS、A8 接入第二个系统时调用） */
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async registerProvider(provider: Provider): Promise<void> {
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await this.registry.register(provider);
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}
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/** 上下文检查点（A3.8）：平台保存的摘要与来源 */
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checkpoint(sessionId: string) {
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return this.contextRepository?.get(sessionId);
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}
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/** 执行记录查询：GET /v1/executions/{id}；待确认中的执行也能查到（回执 status = pending-confirmation） */
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execution(subject: Subject, executionId: string) {
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const record = this.core.executions.get(executionId);
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if (record) {
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if (record.subjectUserId !== subject.userId) throw new AppError('forbidden', '这是别人的执行记录', { status: 403 });
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return record.receipt;
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}
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const action = this.core.approvals?.byExecution(executionId);
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if (!action) return undefined;
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if (action.ownerUserId !== subject.userId) throw new AppError('forbidden', '这是别人的执行记录', { status: 403 });
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return action.receipt;
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}
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/** 执行追溯（A4.5）：按 executionId 追到人、参数摘要、审批与回执；只有本人能看 */
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executionTrace(subject: Subject, executionId: string): ExecutionTraceResponse {
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const record = this.core.executions.get(executionId);
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const action = this.core.approvals?.byExecution(executionId);
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if (!record && !action) throw new AppError('not_found', '没有这条执行记录', { status: 404 });
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const ownerUserId = record?.subjectUserId ?? action?.ownerUserId ?? '';
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if (ownerUserId !== subject.userId) throw new AppError('forbidden', '这是别人的执行记录', { status: 403 });
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const entries = this.controlPlane.audit.trace(executionId).map((entry) => ({
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seq: entry.seq,
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ts: entry.ts,
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event: entry.event,
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actorUserId: entry.actorUserId,
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...(entry.capabilityId === undefined ? {} : { capabilityId: entry.capabilityId }),
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...(entry.providerId === undefined ? {} : { providerId: entry.providerId }),
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...(entry.paramsDigest === undefined ? {} : { paramsDigest: entry.paramsDigest }),
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...(entry.decision === undefined ? {} : { decision: entry.decision }),
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...(entry.detail === undefined ? {} : { detail: entry.detail }),
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}));
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const receipt = record?.receipt ?? action?.receipt;
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return {
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executionId,
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approval:
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action === undefined
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? null
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: {
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approvalId: action.approvalId,
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status: action.status,
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...(action.decision === undefined ? {} : { decision: action.decision }),
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...(action.decidedBy === undefined ? {} : { decidedBy: action.decidedBy }),
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...(action.decidedAt === undefined ? {} : { decidedAt: action.decidedAt }),
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revision: action.revision,
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expiresAt: action.expiresAt,
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},
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entries,
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chainOk: this.controlPlane.audit.verify().ok,
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...(receipt === undefined ? {} : { receipt }),
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};
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}
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/** 确认卡响应（协议第 7 节）：校验归属与版本 → 签发一次性授权 → 执行 → 推事件 */
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async decideApproval(subject: Subject, approvalId: string, body: ApprovalDecisionRequest): Promise<ApprovalDecisionResponse> {
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if (body.decision !== 'approve' && body.decision !== 'reject') throw badRequest('decision 只能是 approve 或 reject');
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if (typeof body.idempotencyKey !== 'string' || body.idempotencyKey.length < 8) throw badRequest('idempotencyKey 至少 8 个字符');
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if (!Number.isInteger(body.revision) || body.revision < 0) throw badRequest('revision 必须是非负整数');
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const pending = this.core.approvals?.get(approvalId);
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if (pending) this.assertSessionAccess(subject, pending.sessionId); // 别人的会话连看都不给看
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const result = await this.core.approve(subject, approvalId, {
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decision: body.decision,
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revision: body.revision,
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idempotencyKey: body.idempotencyKey,
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...(body.note === undefined ? {} : { note: body.note }),
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});
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if (result.kind === 'not-found') throw new AppError('not_found', '确认卡不存在', { status: 404 });
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if (result.kind === 'forbidden') throw new AppError('forbidden', '只有会话发起人可以确认这次动作', { status: 403 });
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const action = this.core.approvals?.get(approvalId);
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const record = action ? this.sessions.get(action.sessionId) : undefined;
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if (record) {
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record.bus.publish({ sessionId: record.summary.sessionId, type: 'approval.resolved', data: { approvalId, decision: result.decision } });
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if (result.receipt && result.receipt.status !== 'pending-confirmation') {
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record.bus.publish({
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sessionId: record.summary.sessionId,
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type: 'execution.updated',
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data: {
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executionId: result.receipt.executionId,
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status: result.receipt.status,
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...(result.receipt.errorKind === undefined ? {} : { errorKind: result.receipt.errorKind }),
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},
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});
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}
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}
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return { approvalId, decision: result.decision, ...(result.receipt === undefined ? {} : { receipt: result.receipt }) };
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}
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/** Core.invoke：工具调用的唯一出口（引擎侧经工具桥调用，见 A3.4） */
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async invoke(request: InvokeRequest) {
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return this.core.invoke(request);
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}
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health(): HealthResponse {
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return { status: 'ok', version: this.version, protocolVersion: PROTOCOL_VERSION };
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}
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me(subject: Subject): MeResponse {
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return {
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userId: subject.userId,
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tenantId: subject.tenantId,
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displayName: subject.displayName,
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clientKind: subject.clientKind,
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};
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}
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listProjects(): ProjectListResponse {
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return { projects: this.projects.list() };
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}
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listSessions(projectId?: string): SessionListResponse {
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return { sessions: this.sessions.list(projectId) };
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}
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createSession(subject: Subject, request: CreateSessionRequest): CreateSessionResponse {
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const scope = request.scope;
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if (scope !== 'personal' && scope !== 'project') throw badRequest('scope 只能是 personal 或 project');
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if (scope === 'project') {
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const projectId = request.projectId;
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if (!projectId) throw badRequest('项目会话必须带 projectId（ADR-0003）');
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if (!this.projects.get(projectId)) throw badRequest(`项目 ${projectId} 不存在`);
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}
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const record = this.sessions.create({ scope, projectId: request.projectId, title: request.title }, subject);
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return { session: record.summary };
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}
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getSession(subject: Subject, sessionId: string): SessionDetailResponse {
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const record = this.assertSessionAccess(subject, sessionId);
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return { session: record.summary, messages: record.messages };
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}
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/** 这个身份能看到的能力：能力清单与引擎工具列表都走这里，保证两者一致 */
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private visibleCapabilitiesFor(subject: Subject) {
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return visibleCapabilities(this.registry.list(), this.visibility, { userId: subject.userId, tenantId: subject.tenantId });
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}
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/** 会话归属校验：不是自己的会话一律拒绝（协作归业务系统，见 D9） */
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assertSessionAccess(subject: Subject, sessionId: string): SessionRecord {
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const record = this.sessions.require(sessionId);
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if (record.owner.userId !== subject.userId) {
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throw new AppError('forbidden', '这是别人的会话', { status: 403 });
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}
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return record;
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}
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capabilities(subject: Subject, sessionId?: string): CapabilitiesResponse {
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if (sessionId) this.assertSessionAccess(subject, sessionId);
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return {
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capabilities: this.visibleCapabilitiesFor(subject).map((capability) => {
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const providerId = this.registry.resolve(capability.id)?.providerId ?? '';
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return {
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id: capability.id,
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providerId,
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title: capability.title ?? capability.description,
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purpose: capability.description,
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effect: capability.effect,
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inputSchema: capability.inputSchema,
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...(capability.synonyms === undefined ? {} : { synonyms: capability.synonyms }),
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};
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}),
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};
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}
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sendMessage(subject: Subject, sessionId: string, request: SendMessageRequest): SendMessageResponse {
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const record = this.assertSessionAccess(subject, sessionId);
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if (typeof request.text !== 'string' || request.text.trim() === '') throw badRequest('text 不能为空');
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if (typeof request.idempotencyKey !== 'string' || request.idempotencyKey.length < 8) {
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throw badRequest('idempotencyKey 至少 8 个字符');
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}
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// 幂等重试优先于「会话忙」判定：同一 key 的重试必须返回原结果，不能报冲突
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const cached = this.sessions.findIdempotencyKey(sessionId, request.idempotencyKey);
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if (cached) return { accepted: true, messageId: cached.messageId, runId: cached.runId };
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if (record.state !== 'idle') throw conflict('上一个运行还没结束，先取消或等它完成');
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const messageId = newId('m');
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const runId = newId('r');
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this.sessions.rememberIdempotencyKey(sessionId, request.idempotencyKey, messageId, runId);
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this.sessions.appendMessage(sessionId, { messageId, role: 'user', ts: Date.now(), text: request.text });
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record.bus.publish({ sessionId, runId, type: 'message.user', data: { messageId, text: request.text } });
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const abort = new AbortController();
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record.runs.set(runId, { runId, abort });
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record.state = 'running';
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void this.runTurn(record, runId, messageId, request.text, abort.signal);
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return { accepted: true, messageId, runId };
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}
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/** 引擎回调入口（A3.11 工具桥的平台侧）：按会话归属者发起调用，身份不由调用方自带 */
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async invokeFromSession(
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sessionId: string,
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input: { capabilityId: string; params: unknown; idempotencyKey?: string; timeoutMs?: number },
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) {
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const record = this.sessions.require(sessionId);
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const receipt = await this.core.invoke({
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subject: { userId: record.owner.userId, tenantId: record.owner.tenantId },
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sessionId,
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projectId: record.summary.projectId,
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capabilityId: input.capabilityId,
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params: input.params,
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...(input.idempotencyKey === undefined ? {} : { idempotencyKey: input.idempotencyKey }),
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...(input.timeoutMs === undefined ? {} : { timeoutMs: input.timeoutMs }),
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});
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// 写操作被策略挡在确认卡上：把确认卡推给界面（协议第 7 节第 2 步）
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if (receipt.status === 'pending-confirmation' && receipt.approvalId !== undefined) {
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const action = this.core.approvals?.get(receipt.approvalId);
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if (action) {
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record.bus.publish({
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sessionId,
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type: 'approval.requested',
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data: {
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approvalId: action.approvalId,
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capabilityId: action.capabilityId,
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paramsDigest: action.paramsDigest,
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impactSummary: action.impactSummary,
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revision: action.revision,
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expiresAt: action.expiresAt,
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},
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});
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}
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}
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return receipt;
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}
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cancel(subject: Subject, sessionId: string): CancelResponse {
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const record = this.assertSessionAccess(subject, sessionId);
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if (record.state !== 'running') return { state: 'idle' };
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record.state = 'cancelling';
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// 先让界面看到「正在取消」，再中止引擎与执行
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const activeRun = [...record.runs.values()][0];
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record.bus.publish({
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sessionId,
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...(activeRun === undefined ? {} : { runId: activeRun.runId }),
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type: 'run.state',
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data: { state: 'cancelling' },
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});
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// 取消：让引擎停在这一轮，回合自然结束（资源等空闲回收或失败回收）
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this.supervisor.get(sessionId)?.abort();
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for (const run of record.runs.values()) run.abort.abort();
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return { state: 'cancelling' };
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}
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/** 事件流保活：无事件时由入口层定时调用（协议文档第 5 节） */
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heartbeat(sessionId: string): void {
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this.sessions.require(sessionId).bus.publish({ sessionId, type: 'heartbeat', data: {} });
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}
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subscribe(subject: Subject, sessionId: string, since: number, listener: (event: PlatformEvent) => void): () => void {
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return this.assertSessionAccess(subject, sessionId).bus.subscribe(since, listener);
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}
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lastSeq(sessionId: string): number {
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return this.sessions.require(sessionId).bus.lastSeq;
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}
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private async runTurn(record: SessionRecord, runId: string, messageId: string, text: string, signal: AbortSignal): Promise<void> {
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const sessionId = record.summary.sessionId;
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const assistantMessageId = `${messageId}-reply`;
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try {
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const runtimeSession = await this.runtimeSessionFor(record);
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// 上下文由平台构建：新起的运行时会话要带上「摘要 + 最近若干轮」，已有原生上下文的会话不重复注入
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const context = this.buildTurnContext(record, messageId);
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const shouldInject = !this.injectedRuntimeSessions.has(runtimeSession.id);
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this.injectedRuntimeSessions.add(runtimeSession.id);
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const promptText = shouldInject && context.prefix !== '' ? `${context.prefix}${text}` : text;
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const result = await runTurn({
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runtimeSession,
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sessionId,
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runId,
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assistantMessageId,
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text: promptText,
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signal,
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publish: (event) => {
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record.bus.publish(event);
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},
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invoke: (capabilityId, args, idempotencyKey) =>
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this.invokeFromSession(sessionId, { capabilityId, params: args, idempotencyKey }),
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});
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if (result.text !== '') {
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this.sessions.appendMessage(sessionId, { messageId: assistantMessageId, role: 'assistant', ts: Date.now(), text: result.text });
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}
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// 正常回合：清零连续失败计数；错误回合：回收后按退避重建（A3.10）
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if (result.finishReason === 'error') {
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await this.supervisor.evict(sessionId, 'failed', '回合以错误收尾');
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} else {
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this.supervisor.markHealthy(sessionId);
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this.supervisor.touch(sessionId);
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}
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// 检查点：把这次构建出的摘要与来源落库，摘要与原始消息都保留（实施设计 1.3）
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this.contextRepository?.save({
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sessionId,
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summary: context.summary,
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summarySourceIds: context.summarySourceIds,
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includedMessageIds: context.includedMessageIds,
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lastMessageId: messageId,
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pinned: [],
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estimatedChars: context.estimatedChars,
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});
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} catch (error) {
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await this.supervisor.evict(sessionId, 'failed', '引擎调用抛错').catch(() => undefined);
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record.bus.publish({
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sessionId,
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runId,
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type: 'error',
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data: { code: 'engine.failed', message: error instanceof Error ? error.message : '引擎执行失败', retryable: true },
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});
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} finally {
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record.runs.delete(runId);
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if (record.state !== 'idle') record.state = 'idle';
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}
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}
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/** 构建这一轮要注入的上下文（排除刚写入的当前用户消息） */
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private buildTurnContext(record: SessionRecord, currentMessageId: string) {
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const history = record.messages.filter((message) => message.messageId !== currentMessageId);
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const executions = this.core.executions.listBySession(record.summary.sessionId, 6).map((item) => ({
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capabilityId: item.capabilityId,
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status: item.status,
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executionId: item.executionId,
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paramsDigest: item.paramsDigest,
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createdAt: item.createdAt,
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}));
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return buildContext({
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messages: history,
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executions,
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...(this.contextBudget === undefined ? {} : { budget: this.contextBudget }),
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||
});
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||
}
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||
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/** 取（或创建）平台会话对应的运行时会话：工具来自能力目录，历史来自平台记录 */
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private async runtimeSessionFor(record: SessionRecord): Promise<RuntimeSession> {
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const sessionId = record.summary.sessionId;
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const capabilities = this.visibleCapabilitiesFor(record.owner);
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// 身份或工具集变了就重建：工具集不能跨身份复用（架构设计 5.1「按身份给工具」）
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const fingerprint = `${record.owner.userId}|${capabilityFingerprint(capabilities)}`;
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return this.supervisor.acquire(sessionId, fingerprint, () =>
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this.runtime.createSession({
|
||
sessionId,
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||
subject: { userId: record.owner.userId, tenantId: record.owner.tenantId },
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||
projectId: record.summary.projectId,
|
||
system: PLATFORM_SYSTEM_PROMPT,
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||
tools: toToolDescriptors(capabilities),
|
||
history: record.messages,
|
||
}),
|
||
);
|
||
}
|
||
|
||
/** 进程管理统计（观测与用例用） */
|
||
processStats() {
|
||
return this.supervisor.stats();
|
||
}
|
||
} |