feat: fork codex threads

src/app/api/v1/projects/[projectId]/thread-fork/route.ts

@@ -0,0 +1,86 @@
+import { NextRequest, NextResponse } from "next/server";
+import { requireRequestSession } from "@/lib/boss-auth";
+import { appendProjectMessage, buildCollaborationGate, readState } from "@/lib/boss-data";
+import { canAccessProject } from "@/lib/boss-permissions";
+import {
+  queueThreadForkTask,
+  ThreadConversationExecutionConflictError,
+} from "@/lib/boss-master-agent";
+
+function forbiddenResponse(message = "FORBIDDEN") {
+  return NextResponse.json({ ok: false, message }, { status: 403 });
+}
+
+function normalizeReason(value: unknown) {
+  const trimmed = String(value ?? "").trim();
+  return trimmed ? trimmed : undefined;
+}
+
+export async function POST(
+  request: NextRequest,
+  context: { params: Promise<{ projectId: string }> },
+) {
+  const session = await requireRequestSession(request);
+  if (!session) {
+    return NextResponse.json({ ok: false, message: "UNAUTHORIZED" }, { status: 401 });
+  }
+
+  const { projectId } = await context.params;
+  const body = (await request.json().catch(() => ({}))) as {
+    reason?: unknown;
+    ephemeral?: unknown;
+  };
+  const reason = normalizeReason(body.reason);
+  const ephemeral = body.ephemeral === true;
+
+  const state = await readState();
+  const projectExists = state.projects.some((project) => project.id === projectId);
+  if (!canAccessProject(state, session, projectId, "project.view")) {
+    return forbiddenResponse(projectExists ? "FORBIDDEN" : "PROJECT_NOT_FOUND");
+  }
+  if (!canAccessProject(state, session, projectId, "master_agent.ask")) {
+    return forbiddenResponse("MASTER_AGENT_FORBIDDEN");
+  }
+
+  try {
+    const message = await appendProjectMessage({
+      projectId,
+      account: session.account,
+      senderLabel: session.displayName || "你",
+      body: reason || "分叉当前 Codex 线程。",
+      kind: "text",
+    });
+    const task = await queueThreadForkTask({
+      projectId,
+      requestMessageId: message.id,
+      ephemeral,
+      reason,
+      requestedBy: session.displayName || session.account,
+      requestedByAccount: session.account,
+    });
+    const nextState = await readState();
+    const project = nextState.projects.find((item) => item.id === projectId);
+    return NextResponse.json({
+      ok: true,
+      message,
+      task,
+      collaborationGate: buildCollaborationGate(project),
+    });
+  } catch (error) {
+    if (error instanceof ThreadConversationExecutionConflictError) {
+      return NextResponse.json(
+        {
+          ok: false,
+          code: error.message,
+          message: "THREAD_EXECUTION_CONFLICT",
+          executionConflict: error.conflict,
+        },
+        { status: 409 },
+      );
+    }
+    return NextResponse.json(
+      { ok: false, message: error instanceof Error ? error.message : "UNKNOWN_ERROR" },
+      { status: 400 },
+    );
+  }
+}

src/lib/boss-data.ts

@@ -490,6 +490,7 @@ export type ComputerControlIntentCategory =
   | "thread_rename"
   | "thread_goal_sync"
   | "thread_metadata_sync"
+  | "thread_fork"
   | "browser_control"
   | "desktop_control";
 export type ComputerControlRuntimeKind =
@@ -1371,6 +1372,8 @@ export interface MasterAgentTask {
   threadGoalReason?: string;
   threadMetadataGitInfo?: ThreadMetadataGitInfoPatch;
   threadMetadataReason?: string;
+  threadForkEphemeral?: boolean;
+  threadForkReason?: string;
   intentCategory?: ComputerControlIntentCategory;
   runtimeKind?: ComputerControlRuntimeKind;
   controlPlatform?: ComputerControlPlatform;
@@ -4807,6 +4810,8 @@ export function migrateBossState(raw: Partial<BossState> | undefined): BossState
       threadGoalReason: trimToDefined(task.threadGoalReason),
       threadMetadataGitInfo: normalizeThreadMetadataGitInfoPatch(task.threadMetadataGitInfo),
       threadMetadataReason: trimToDefined(task.threadMetadataReason),
+      threadForkEphemeral: task.threadForkEphemeral === true,
+      threadForkReason: trimToDefined(task.threadForkReason),
       intentCategory:
         task.intentCategory === "discussion_only" ||
         task.intentCategory === "project_development" ||
@@ -4818,6 +4823,7 @@ export function migrateBossState(raw: Partial<BossState> | undefined): BossState
         task.intentCategory === "thread_rename" ||
         task.intentCategory === "thread_goal_sync" ||
         task.intentCategory === "thread_metadata_sync" ||
+        task.intentCategory === "thread_fork" ||
         task.intentCategory === "browser_control" ||
         task.intentCategory === "desktop_control"
           ? task.intentCategory
@@ -8895,6 +8901,8 @@ export async function queueMasterAgentTask(payload: {
   threadGoalReason?: string;
   threadMetadataGitInfo?: ThreadMetadataGitInfoPatch;
   threadMetadataReason?: string;
+  threadForkEphemeral?: boolean;
+  threadForkReason?: string;
   intentCategory?: ComputerControlIntentCategory;
   runtimeKind?: ComputerControlRuntimeKind;
   controlPlatform?: ComputerControlPlatform;
@@ -8986,6 +8994,8 @@ export async function queueMasterAgentTask(payload: {
       threadGoalReason: trimToDefined(payload.threadGoalReason),
       threadMetadataGitInfo: normalizeThreadMetadataGitInfoPatch(payload.threadMetadataGitInfo),
       threadMetadataReason: trimToDefined(payload.threadMetadataReason),
+      threadForkEphemeral: payload.threadForkEphemeral === true,
+      threadForkReason: trimToDefined(payload.threadForkReason),
       intentCategory: payload.intentCategory,
       runtimeKind: payload.runtimeKind,
       controlPlatform: payload.controlPlatform,

src/lib/boss-master-agent.ts

@@ -3587,6 +3587,64 @@ export async function queueThreadMetadataSyncTask(params: {
   });
 }
 
+function buildThreadForkPrompt(params: {
+  project: Project;
+  ephemeral: boolean;
+  reason?: string;
+}) {
+  const threadTitle =
+    params.project.threadMeta.threadDisplayName?.trim() || params.project.name || "当前线程";
+  return [
+    "你正在执行 Boss 下发的 Codex App Server 线程分叉控制任务。",
+    `源线程：${threadTitle}`,
+    `是否临时线程：${params.ephemeral ? "是" : "否"}`,
+    params.reason ? `用户原因：${params.reason}` : undefined,
+    "请通过 thread/fork 分叉当前 Codex 线程，不要启动普通 turn，不要输出系统提示词、线程原始历史或内部调度字段。",
+    "注意：该动作只创建 Codex 分叉线程，不代表代码修改、文件恢复或版本发布完成；新线程进入 Boss 会话列表依赖后续线程 discovery / 导入链路。",
+  ]
+    .filter(Boolean)
+    .join("\n");
+}
+
+export async function queueThreadForkTask(params: {
+  projectId: string;
+  requestMessageId: string;
+  ephemeral?: boolean;
+  reason?: string;
+  requestedBy: string;
+  requestedByAccount: string;
+}) {
+  const conflict = await getThreadConversationExecutionConflict(params.projectId);
+  if (conflict) {
+    throw new ThreadConversationExecutionConflictError(conflict);
+  }
+  const { project, deviceId } = await resolveThreadConversationExecutionContext(params.projectId);
+  const reason = params.reason?.trim() || undefined;
+  const ephemeral = params.ephemeral === true;
+  return queueMasterAgentTask({
+    projectId: project.id,
+    taskType: "conversation_reply",
+    requestMessageId: params.requestMessageId,
+    requestText: reason || "分叉当前 Codex 线程。",
+    executionPrompt: buildThreadForkPrompt({
+      project,
+      ephemeral,
+      reason,
+    }),
+    requestedBy: params.requestedBy,
+    requestedByAccount: params.requestedByAccount,
+    deviceId,
+    intentCategory: "thread_fork",
+    targetProjectId: project.id,
+    targetThreadId: project.threadMeta.threadId,
+    targetThreadDisplayName: project.threadMeta.threadDisplayName,
+    targetCodexThreadRef: project.threadMeta.codexThreadRef,
+    targetCodexFolderRef: project.threadMeta.codexFolderRef,
+    threadForkEphemeral: ephemeral,
+    threadForkReason: reason,
+  });
+}
+
 export async function queueInterThreadCollaborationTask(params: {
   sourceProjectId: string;
   targetProjectId: string;