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 },
+    );
+  }
+}