feat: fork codex threads

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;