diff --git a/internal/project-management/server.test.ts b/internal/project-management/server.test.ts
index cf41d6de..a157c40e 100644
--- a/internal/project-management/server.test.ts
+++ b/internal/project-management/server.test.ts
@@ -55,7 +55,7 @@ test("project management app exposes MDTODO read model and Workbench link writes
     const taskLinks = await json(app, `/v1/project-management/workbench-links?taskRef=${encodeURIComponent(tasks.tasks[0].taskRef)}`);
     expect(taskLinks.links[0].sessionId).toBe("ses_project_test");
 
-    const rejected = await app.fetch(new Request("http://service/v1/project-management/mdtodo/tasks", { method: "POST" }));
+    const rejected = await app.fetch(new Request("http://service/v1/project-management/mdtodo/tasks", { method: "PUT" }));
     expect(rejected.status).toBe(405);
 
     await app.close();
@@ -132,6 +132,43 @@ test("project management app configures HWPOD source and writes MDTODO content",
       ["R1.1", "Child", "done"]
     ]);
 
+    const rootTaskRef = `mdtodo:hwpod-mdtodo:${fileRef}:R1`;
+    const updateTask = await app.fetch(jsonRequest(`/v1/project-management/mdtodo/tasks/${encodeURIComponent(rootTaskRef)}`, {
+      method: "PATCH",
+      body: { expectedFingerprint: written.file.fingerprint, title: "Root from task API", status: "in_progress", body: "Task API body." }
+    }));
+    expect(updateTask.status).toBe(200);
+    const updatedTask = await updateTask.json();
+    expect(updatedTask.task.title).toBe("Root from task API");
+    expect(updatedTask.task.status).toBe("in_progress");
+    expect(await readFile(samplePath, "utf8")).toContain("## R1 Root from task API [in_progress]\n\nTask API body.");
+
+    const addSubtask = await app.fetch(jsonRequest("/v1/project-management/mdtodo/tasks", {
+      method: "POST",
+      body: { parentTaskRef: rootTaskRef, expectedFingerprint: updatedTask.file.fingerprint, title: "Added child", body: "Child body." }
+    }));
+    expect(addSubtask.status).toBe(201);
+    const added = await addSubtask.json();
+    expect(added.changedTaskId).toBe("R1.2");
+    expect(added.task.taskRef).toBe(`mdtodo:hwpod-mdtodo:${fileRef}:R1.2`);
+
+    const continueTask = await app.fetch(jsonRequest("/v1/project-management/mdtodo/tasks", {
+      method: "POST",
+      body: { afterTaskRef: `mdtodo:hwpod-mdtodo:${fileRef}:R1.1`, expectedFingerprint: added.file.fingerprint, title: "Continued child" }
+    }));
+    expect(continueTask.status).toBe(201);
+    const continued = await continueTask.json();
+    expect(continued.changedTaskId).toBe("R1.3");
+
+    const deleteTask = await app.fetch(jsonRequest(`/v1/project-management/mdtodo/tasks/${encodeURIComponent(added.task.taskRef)}`, {
+      method: "DELETE",
+      body: { expectedFingerprint: continued.file.fingerprint }
+    }));
+    expect(deleteTask.status).toBe(200);
+    const deleted = await deleteTask.json();
+    expect(deleted.affectedTaskIds).toEqual(["R1.2"]);
+    expect(await readFile(samplePath, "utf8")).not.toContain("R1.2 Added child");
+
     const conflict = await app.fetch(jsonRequest(`/v1/project-management/mdtodo/files/${fileRef}/content?sourceId=hwpod-mdtodo`, {
       method: "PATCH",
       body: { sourceId: "hwpod-mdtodo", expectedFingerprint: content.file.fingerprint, content: nextContent }
diff --git a/internal/project-management/server.ts b/internal/project-management/server.ts
index 4af64f7b..f07fea25 100644
--- a/internal/project-management/server.ts
+++ b/internal/project-management/server.ts
@@ -1,6 +1,7 @@
 import { createHash, randomUUID } from "node:crypto";
 import path from "node:path";
 
+import { mutateMdtodoDocument } from "./mdtodo.ts";
 import { createMdtodoSourceAdapter, normalizeProjectSourceInput, sourceProjection } from "./source-adapter.ts";
 
 const contractVersion = "project-management-v1";
@@ -98,6 +99,19 @@ export function createProjectManagementApp(options = {}) {
         await initialize();
         return await handleWriteMdtodoFile(request, url, store, sourceAdapter, fileContent.fileRef, actorFromRequest(request));
       }
+      const taskAction = matchTaskAction(url.pathname);
+      if (url.pathname === "/v1/project-management/mdtodo/tasks" && request.method === "POST") {
+        await initialize();
+        return await handleCreateMdtodoTask(request, store, sourceAdapter, actorFromRequest(request));
+      }
+      if (taskAction && request.method === "PATCH") {
+        await initialize();
+        return await handlePatchMdtodoTask(request, store, sourceAdapter, taskAction.taskRef, actorFromRequest(request));
+      }
+      if (taskAction && request.method === "DELETE") {
+        await initialize();
+        return await handleDeleteMdtodoTask(request, store, sourceAdapter, taskAction.taskRef, actorFromRequest(request));
+      }
       if (request.method !== "GET" && request.method !== "HEAD") return jsonError(405, "method_not_allowed", "Project management API only accepts read requests plus Workbench link writes");
 
       await initialize();
@@ -305,6 +319,97 @@ async function handleWriteMdtodoFile(request, url, store, sourceAdapter, fileRef
   return json(200, envelope({ file, projection }));
 }
 
+async function handlePatchMdtodoTask(request, store, sourceAdapter, taskRef, actor) {
+  const body = await readJsonObject(request, 256 * 1024);
+  if (!body.ok) return jsonError(body.code === "body_too_large" ? 413 : 400, body.code, body.message);
+  const task = await getTaskByRef(store, taskRef);
+  if (!task) return jsonError(404, "task_not_found", "MDTODO task was not found");
+  const expectedFingerprint = safeOpaqueValue(body.value.expectedFingerprint ?? body.value.revision ?? body.value.expectedRevision);
+  if (!expectedFingerprint) return jsonError(400, "expected_fingerprint_required", "expectedFingerprint is required for MDTODO task writes");
+  const operations = [];
+  if (typeof body.value.title === "string") operations.push({ type: "updateTitle", rxxId: task.taskId, title: body.value.title });
+  if (typeof body.value.status === "string") operations.push({ type: "updateStatus", rxxId: task.taskId, status: body.value.status });
+  if (typeof body.value.body === "string") operations.push({ type: "updateBody", rxxId: task.taskId, body: body.value.body });
+  if (operations.length === 0) return jsonError(400, "mutation_required", "At least one MDTODO task field is required");
+  return mutateTaskDocument({ store, sourceAdapter, sourceId: task.sourceId, fileRef: task.fileRef, expectedFingerprint, operations, auditAction: "mdtodo.task.update", targetTaskRef: taskRef, actor, status: 200 });
+}
+
+async function handleCreateMdtodoTask(request, store, sourceAdapter, actor) {
+  const body = await readJsonObject(request, 256 * 1024);
+  if (!body.ok) return jsonError(body.code === "body_too_large" ? 413 : 400, body.code, body.message);
+  const expectedFingerprint = safeOpaqueValue(body.value.expectedFingerprint ?? body.value.revision ?? body.value.expectedRevision);
+  if (!expectedFingerprint) return jsonError(400, "expected_fingerprint_required", "expectedFingerprint is required for MDTODO task writes");
+  const title = shortText(body.value.title, 500);
+  if (!title) return jsonError(400, "title_required", "title is required for MDTODO task creation");
+  const parentTask = body.value.parentTaskRef ? await getTaskByRef(store, safeOpaqueValue(body.value.parentTaskRef)) : null;
+  const afterTask = body.value.afterTaskRef ? await getTaskByRef(store, safeOpaqueValue(body.value.afterTaskRef)) : null;
+  if (body.value.parentTaskRef && !parentTask) return jsonError(404, "parent_task_not_found", "Parent MDTODO task was not found");
+  if (body.value.afterTaskRef && !afterTask) return jsonError(404, "after_task_not_found", "Continuation MDTODO task was not found");
+  const sourceId = parentTask?.sourceId ?? afterTask?.sourceId ?? safeToken(body.value.sourceId, null);
+  const fileRef = parentTask?.fileRef ?? afterTask?.fileRef ?? safeToken(body.value.fileRef, null);
+  if (!sourceId || !fileRef) return jsonError(400, "task_target_required", "sourceId and fileRef are required for root MDTODO task creation");
+  const operation = {
+    type: "addTask",
+    title,
+    status: body.value.status ?? "open",
+    body: typeof body.value.body === "string" ? body.value.body : "",
+    parentRxxId: parentTask?.taskId ?? null,
+    afterRxxId: afterTask?.taskId ?? null
+  };
+  return mutateTaskDocument({ store, sourceAdapter, sourceId, fileRef, expectedFingerprint, operations: [operation], auditAction: "mdtodo.task.create", targetTaskRef: parentTask?.taskRef ?? afterTask?.taskRef ?? `${sourceId}:${fileRef}`, actor, status: 201 });
+}
+
+async function handleDeleteMdtodoTask(request, store, sourceAdapter, taskRef, actor) {
+  const body = await readJsonObject(request, 32768);
+  if (!body.ok) return jsonError(400, body.code, body.message);
+  const task = await getTaskByRef(store, taskRef);
+  if (!task) return jsonError(404, "task_not_found", "MDTODO task was not found");
+  const expectedFingerprint = safeOpaqueValue(body.value.expectedFingerprint ?? body.value.revision ?? body.value.expectedRevision);
+  if (!expectedFingerprint) return jsonError(400, "expected_fingerprint_required", "expectedFingerprint is required for MDTODO task writes");
+  return mutateTaskDocument({ store, sourceAdapter, sourceId: task.sourceId, fileRef: task.fileRef, expectedFingerprint, operations: [{ type: "deleteTask", rxxId: task.taskId }], auditAction: "mdtodo.task.delete", targetTaskRef: taskRef, actor, status: 200 });
+}
+
+async function mutateTaskDocument({ store, sourceAdapter, sourceId, fileRef, expectedFingerprint, operations, auditAction, targetTaskRef, actor, status }) {
+  const { source, document, error } = await resolveMdtodoDocument(store, sourceId, fileRef);
+  if (error) return error;
+  const current = await sourceAdapter.readFile(source, document.relativePath);
+  let markdown = current.content;
+  let mutation = null;
+  for (const operation of operations) {
+    mutation = mutateMdtodoDocument(markdown, { ...operation, expectedFingerprint: mutation ? null : expectedFingerprint }, { sourceId: source.sourceId, relativePath: document.relativePath, projectId: document.projectId });
+    if (!mutation.ok) return jsonError(mutation.conflict ? 409 : 400, mutation.code ?? "mdtodo_mutation_failed", mutation.message ?? "MDTODO task mutation failed");
+    markdown = mutation.markdown;
+  }
+  const file = await sourceAdapter.writeFile(source, document.relativePath, markdown, expectedFingerprint);
+  const documents = await sourceAdapter.discover(source);
+  await store.replaceProjection(source, documents);
+  const projection = sourceProjection(source, documents);
+  const tasks = await store.listTasks({ sourceId: source.sourceId, fileRef });
+  const changedTaskRef = mutation?.changedTaskId ? `mdtodo:${source.sourceId}:${fileRef}:${mutation.changedTaskId}` : null;
+  const task = changedTaskRef ? tasks.find((item) => item.taskRef === changedTaskRef) ?? null : null;
+  await recordAuditEvent(store, { actor }, { action: auditAction, targetType: "mdtodo_task", targetId: targetTaskRef, outcome: "succeeded", sourceKind: source.sourceKind, fileRef, revision: file.revision, changedTaskId: mutation?.changedTaskId ?? null, affectedTaskIds: mutation?.affectedTaskIds ?? [] });
+  return json(status, envelope({ task, affectedTaskIds: mutation?.affectedTaskIds ?? [], changedTaskId: mutation?.changedTaskId ?? null, file: fileSummary(file), projection }));
+}
+
+async function getTaskByRef(store, taskRef) {
+  const safeTaskRef = safeOpaqueValue(taskRef);
+  if (!safeTaskRef) return null;
+  return (await store.listTasks({})).find((task) => task.taskRef === safeTaskRef) ?? null;
+}
+
+function fileSummary(file) {
+  return {
+    sourceId: file.sourceId,
+    fileRef: file.fileRef,
+    relativePath: file.relativePath,
+    fingerprint: file.fingerprint,
+    revision: file.revision,
+    parserMode: file.parserMode,
+    taskCount: file.taskCount,
+    valuesRedacted: true
+  };
+}
+
 async function resolveMdtodoDocument(store, sourceId, fileRef) {
   const source = await getSource(store, sourceId);
   if (!source) return { error: jsonError(404, "source_not_found", "MDTODO source was not found") };
@@ -395,6 +500,11 @@ function matchFileContent(pathname) {
   return match ? { fileRef: match[1] } : null;
 }
 
+function matchTaskAction(pathname) {
+  const match = /^\/v1\/project-management\/mdtodo\/tasks\/(.+)$/u.exec(pathname);
+  return match ? { taskRef: decodeURIComponent(match[1]) } : null;
+}
+
 function safeOpaqueValue(value) {
   const text = String(value ?? "").trim();
   return /^[A-Za-z0-9_.:/#-]{1,360}$/u.test(text) ? text : null;
diff --git a/web/hwlab-cloud-web/scripts/workbench-e2e-server.ts b/web/hwlab-cloud-web/scripts/workbench-e2e-server.ts
index bcead1d1..655fdd04 100644
--- a/web/hwlab-cloud-web/scripts/workbench-e2e-server.ts
+++ b/web/hwlab-cloud-web/scripts/workbench-e2e-server.ts
@@ -32,6 +32,9 @@ interface ScenarioState {
   legacyRequestLedger: JsonRecord[];
   chatRequests: JsonRecord[];
   projectLinks: JsonRecord[];
+  projectFiles: JsonRecord[];
+  projectTasks: JsonRecord[];
+  projectRevision: number;
   listOmitSelected: boolean;
   sessionDelayMs: number;
   sessionDetailDelayMs: number;
@@ -290,7 +293,7 @@ function hwpodNodeOpsPayload(): JsonRecord {
 async function projectManagementPayload(request: IncomingMessage, response: ServerResponse, url: URL, method: string): Promise<void> {
   const path = url.pathname;
   const source = projectManagementSource();
-  const files = projectManagementFiles();
+  const files = state.projectFiles;
   const links = state.projectLinks;
   const tasks = projectManagementTasks(links);
 
@@ -320,6 +323,10 @@ async function projectManagementPayload(request: IncomingMessage, response: Serv
     state.projectLinks.unshift(link);
     return json(response, 201, projectManagementEnvelope({ link }));
   }
+  const taskMutationMatch = path.match(/^\/v1\/project-management\/mdtodo\/tasks\/(.+)$/u);
+  if (path === "/v1/project-management/mdtodo/tasks" && method === "POST") return projectManagementCreateTask(response, await readJson(request));
+  if (taskMutationMatch && method === "PATCH") return projectManagementUpdateTask(response, decodeURIComponent(taskMutationMatch[1] ?? ""), await readJson(request));
+  if (taskMutationMatch && method === "DELETE") return projectManagementDeleteTask(response, decodeURIComponent(taskMutationMatch[1] ?? ""), await readJson(request));
   if (method !== "GET" && method !== "HEAD") return json(response, 405, { ok: false, contractVersion: "project-management-v1", serviceId: "hwlab-project-management", error: { code: "method_not_allowed" }, valuesRedacted: true });
 
   if (path === "/v1/project-management" || path === "/v1/project-management/navigation") {
@@ -378,19 +385,114 @@ function projectManagementFiles(): JsonRecord[] {
 }
 
 function projectManagementTasks(links: JsonRecord[] = []): JsonRecord[] {
+  const linkCount = (taskRef: string) => links.filter((link) => link.taskRef === taskRef).length;
+  return state.projectTasks.map((task) => ({ ...task, linkCount: linkCount(String(task.taskRef ?? "")) }));
+}
+
+function projectManagementSeedTasks(links: JsonRecord[] = []): JsonRecord[] {
   const linkCount = (taskRef: string) => links.filter((link) => link.taskRef === taskRef).length;
   const r1 = "mdtodo:hwlab-v03-mdtodo:file_plan:R1";
   const r11 = "mdtodo:hwlab-v03-mdtodo:file_plan:R1.1";
   const r111 = "mdtodo:hwlab-v03-mdtodo:file_plan:R1.1.1";
   const r2 = "mdtodo:hwlab-v03-mdtodo:file_rollout:R2";
   return [
-    { taskRef: r1, projectId: "project_hwlab_v03", sourceId: "hwlab-v03-mdtodo", fileRef: "file_plan", taskId: "R1", title: "实现项目根导航", status: "done", parentTaskRef: null, depth: 0, lineNumber: 4, ordinal: 1, linkCount: linkCount(r1), updatedAt: "2026-06-25T09:00:00.000Z" },
-    { taskRef: r11, projectId: "project_hwlab_v03", sourceId: "hwlab-v03-mdtodo", fileRef: "file_plan", taskId: "R1.1", title: "展示 MDTODO 任务详情", status: "open", parentTaskRef: r1, depth: 1, lineNumber: 8, ordinal: 2, linkCount: linkCount(r11), updatedAt: "2026-06-25T09:00:00.000Z" },
-    { taskRef: r111, projectId: "project_hwlab_v03", sourceId: "hwlab-v03-mdtodo", fileRef: "file_plan", taskId: "R1.1.1", title: "Source 顶部控制", status: "in_progress", parentTaskRef: r11, depth: 2, lineNumber: 12, ordinal: 3, linkCount: linkCount(r111), updatedAt: "2026-06-25T09:00:00.000Z" },
-    { taskRef: r2, projectId: "project_hwlab_v03", sourceId: "hwlab-v03-mdtodo", fileRef: "file_rollout", taskId: "R2", title: "D601 v03 页面验收", status: "blocked", parentTaskRef: null, depth: 0, lineNumber: 3, ordinal: 4, linkCount: linkCount(r2), updatedAt: "2026-06-25T09:00:00.000Z" }
+    { taskRef: r1, projectId: "project_hwlab_v03", sourceId: "hwlab-v03-mdtodo", fileRef: "file_plan", taskId: "R1", title: "实现项目根导航", status: "done", parentTaskRef: null, depth: 0, lineNumber: 4, ordinal: 1, linkCount: linkCount(r1), sourceFingerprint: "sha256:e2e-plan", bodyPreview: "Root notes", updatedAt: "2026-06-25T09:00:00.000Z" },
+    { taskRef: r11, projectId: "project_hwlab_v03", sourceId: "hwlab-v03-mdtodo", fileRef: "file_plan", taskId: "R1.1", title: "展示 MDTODO 任务详情", status: "open", parentTaskRef: r1, depth: 1, lineNumber: 8, ordinal: 2, linkCount: linkCount(r11), sourceFingerprint: "sha256:e2e-plan", bodyPreview: "Detail body", updatedAt: "2026-06-25T09:00:00.000Z" },
+    { taskRef: r111, projectId: "project_hwlab_v03", sourceId: "hwlab-v03-mdtodo", fileRef: "file_plan", taskId: "R1.1.1", title: "Source 顶部控制", status: "in_progress", parentTaskRef: r11, depth: 2, lineNumber: 12, ordinal: 3, linkCount: linkCount(r111), sourceFingerprint: "sha256:e2e-plan", bodyPreview: "Toolbar body", updatedAt: "2026-06-25T09:00:00.000Z" },
+    { taskRef: r2, projectId: "project_hwlab_v03", sourceId: "hwlab-v03-mdtodo", fileRef: "file_rollout", taskId: "R2", title: "D601 v03 页面验收", status: "blocked", parentTaskRef: null, depth: 0, lineNumber: 3, ordinal: 4, linkCount: linkCount(r2), sourceFingerprint: "sha256:e2e-rollout", bodyPreview: "Rollout body", updatedAt: "2026-06-25T09:00:00.000Z" }
   ];
 }
 
+function projectManagementUpdateTask(response: ServerResponse, taskRef: string, body: JsonRecord): void {
+  const task = state.projectTasks.find((item) => item.taskRef === taskRef);
+  if (!task) return json(response, 404, { ok: false, contractVersion: "project-management-v1", serviceId: "hwlab-project-management", error: { code: "task_not_found" }, valuesRedacted: true });
+  const file = projectFileForTask(task);
+  if (!projectManagementExpectedFingerprintOk(response, file, body)) return;
+  if (typeof body.title === "string" && body.title.trim()) task.title = body.title.trim();
+  if (typeof body.status === "string" && body.status.trim()) task.status = body.status.trim();
+  if (typeof body.body === "string") task.bodyPreview = body.body.slice(0, 240);
+  task.updatedAt = new Date().toISOString();
+  touchProjectFile(String(task.fileRef));
+  return json(response, 200, projectManagementEnvelope({ task, file: projectFileForTask(task), changedTaskId: task.taskId, affectedTaskIds: [task.taskId] }));
+}
+
+function projectManagementCreateTask(response: ServerResponse, body: JsonRecord): void {
+  const parent = typeof body.parentTaskRef === "string" ? state.projectTasks.find((item) => item.taskRef === body.parentTaskRef) : null;
+  const after = typeof body.afterTaskRef === "string" ? state.projectTasks.find((item) => item.taskRef === body.afterTaskRef) : null;
+  const sourceId = String(parent?.sourceId ?? after?.sourceId ?? body.sourceId ?? "hwlab-v03-mdtodo");
+  const fileRef = String(parent?.fileRef ?? after?.fileRef ?? body.fileRef ?? "file_plan");
+  const file = state.projectFiles.find((item) => item.sourceId === sourceId && item.fileRef === fileRef);
+  if (!file) return json(response, 404, { ok: false, contractVersion: "project-management-v1", serviceId: "hwlab-project-management", error: { code: "file_not_found" }, valuesRedacted: true });
+  if (!projectManagementExpectedFingerprintOk(response, file, body)) return;
+  const title = String(body.title ?? "").trim();
+  if (!title) return json(response, 400, { ok: false, contractVersion: "project-management-v1", serviceId: "hwlab-project-management", error: { code: "title_required" }, valuesRedacted: true });
+  const taskId = parent ? nextProjectChildTaskId(fileRef, String(parent.taskId)) : after ? nextProjectSiblingTaskId(fileRef, String(after.taskId)) : nextProjectRootTaskId(fileRef);
+  const taskRef = `mdtodo:${sourceId}:${fileRef}:${taskId}`;
+  const parentTaskRef = parent?.taskRef ?? after?.parentTaskRef ?? null;
+  const task = { taskRef, projectId: "project_hwlab_v03", sourceId, fileRef, taskId, title, status: String(body.status ?? "open"), parentTaskRef, depth: taskId.split(".").length - 1, lineNumber: 20 + state.projectTasks.length, ordinal: state.projectTasks.length + 1, linkCount: 0, sourceFingerprint: file.fingerprint, bodyPreview: typeof body.body === "string" ? body.body.slice(0, 240) : "", updatedAt: new Date().toISOString() };
+  state.projectTasks.push(task);
+  touchProjectFile(fileRef);
+  return json(response, 201, projectManagementEnvelope({ task, file: projectFileForTask(task), changedTaskId: taskId, affectedTaskIds: [taskId] }));
+}
+
+function projectManagementDeleteTask(response: ServerResponse, taskRef: string, body: JsonRecord): void {
+  const task = state.projectTasks.find((item) => item.taskRef === taskRef);
+  if (!task) return json(response, 404, { ok: false, contractVersion: "project-management-v1", serviceId: "hwlab-project-management", error: { code: "task_not_found" }, valuesRedacted: true });
+  const file = projectFileForTask(task);
+  if (!projectManagementExpectedFingerprintOk(response, file, body)) return;
+  const prefix = `${task.taskId}.`;
+  const affected = state.projectTasks.filter((item) => item.taskRef === taskRef || String(item.taskId).startsWith(prefix)).map((item) => String(item.taskId));
+  state.projectTasks = state.projectTasks.filter((item) => !(item.taskRef === taskRef || String(item.taskId).startsWith(prefix)));
+  touchProjectFile(String(task.fileRef));
+  return json(response, 200, projectManagementEnvelope({ task: null, file: projectFileForTask(task), changedTaskId: task.taskId, affectedTaskIds: affected }));
+}
+
+function projectManagementExpectedFingerprintOk(response: ServerResponse, file: JsonRecord, body: JsonRecord): boolean {
+  const expected = String(body.expectedFingerprint ?? body.revision ?? "");
+  if (!expected) {
+    json(response, 400, { ok: false, contractVersion: "project-management-v1", serviceId: "hwlab-project-management", error: { code: "expected_fingerprint_required" }, valuesRedacted: true });
+    return false;
+  }
+  if (expected !== file.fingerprint) {
+    json(response, 409, { ok: false, contractVersion: "project-management-v1", serviceId: "hwlab-project-management", error: { code: "revision_conflict" }, valuesRedacted: true });
+    return false;
+  }
+  return true;
+}
+
+function projectFileForTask(task: JsonRecord): JsonRecord {
+  const file = state.projectFiles.find((item) => item.sourceId === task.sourceId && item.fileRef === task.fileRef) ?? state.projectFiles[0];
+  if (!file) throw new Error("project management fake-server file fixture is missing");
+  return file;
+}
+
+function touchProjectFile(fileRef: string): void {
+  state.projectRevision += 1;
+  const file = state.projectFiles.find((item) => item.fileRef === fileRef);
+  if (!file) return;
+  file.revision = Number(file.revision ?? 1) + 1;
+  file.fingerprint = `sha256:e2e-${fileRef}-${state.projectRevision}`;
+  file.taskCount = state.projectTasks.filter((task) => task.fileRef === fileRef).length;
+  file.updatedAt = new Date().toISOString();
+  for (const task of state.projectTasks.filter((item) => item.fileRef === fileRef)) task.sourceFingerprint = file.fingerprint;
+}
+
+function nextProjectRootTaskId(fileRef: string): string {
+  const next = Math.max(0, ...state.projectTasks.filter((task) => task.fileRef === fileRef && !String(task.taskId).includes(".")).map((task) => Number(String(task.taskId).replace(/^R/u, "")) || 0)) + 1;
+  return `R${next}`;
+}
+
+function nextProjectChildTaskId(fileRef: string, parentTaskId: string): string {
+  const prefix = `${parentTaskId}.`;
+  const next = Math.max(0, ...state.projectTasks.filter((task) => task.fileRef === fileRef && String(task.taskId).startsWith(prefix)).map((task) => Number(String(task.taskId).slice(prefix.length).split(".")[0]) || 0)) + 1;
+  return `${parentTaskId}.${next}`;
+}
+
+function nextProjectSiblingTaskId(fileRef: string, afterTaskId: string): string {
+  const parent = afterTaskId.includes(".") ? afterTaskId.split(".").slice(0, -1).join(".") : "";
+  return parent ? nextProjectChildTaskId(fileRef, parent) : nextProjectRootTaskId(fileRef);
+}
+
 function projectManagementSeedLinks(): JsonRecord[] {
   return [{ linkId: "lnk_project_task_root", projectId: "project_hwlab_v03", taskRef: "mdtodo:hwlab-v03-mdtodo:file_plan:R1", sessionId: "ses_project_seed", traceId: "trc_project_seed", role: "reference", updatedAt: "2026-06-25T09:00:00.000Z" }];
 }
@@ -911,6 +1013,7 @@ function createScenarioState(scenarioId: string): ScenarioState {
           ? "ses_running"
           : base.selectedSessionId;
   const staleTraceId = id === "stale-nested-trace" || id === "stale-submit-restore" ? "trc_stale_502" : null;
+  const projectLinks = projectManagementSeedLinks();
   return {
     scenarioId: id,
     providerProfile: base.providerProfile,
@@ -920,7 +1023,10 @@ function createScenarioState(scenarioId: string): ScenarioState {
     requestLedger: [],
     legacyRequestLedger: [],
     chatRequests: [],
-    projectLinks: projectManagementSeedLinks(),
+    projectLinks,
+    projectFiles: projectManagementFiles(),
+    projectTasks: projectManagementSeedTasks(projectLinks),
+    projectRevision: 1,
     listOmitSelected: id === "selected-missing-from-list",
     sessionDelayMs: id === "loading" ? 2_500 : 0,
     sessionDetailDelayMs: id === "legacy-cnv-deeplink-canonical" ? 1_500 : id === "session-switch-delayed-detail-frame" ? 900 : id === "submit-authority-race" ? 1_000 : 0,
diff --git a/web/hwlab-cloud-web/src/api/index.ts b/web/hwlab-cloud-web/src/api/index.ts
index f7258078..76dae965 100644
--- a/web/hwlab-cloud-web/src/api/index.ts
+++ b/web/hwlab-cloud-web/src/api/index.ts
@@ -14,7 +14,7 @@ export { apiKeysAPI } from "./apiKeys";
 export { usageAPI } from "./usage";
 export { billingAPI } from "./billing";
 export { systemAPI, type SkillUploadFileInput } from "./system";
-export { projectManagementAPI, type MdtodoFileRecord, type MdtodoTaskRecord, type ProjectNavigationResponse, type ProjectRecord, type ProjectSource, type ProjectSourceInput, type ProjectWorkbenchLinkRecord } from "./projectManagement";
+export { projectManagementAPI, type MdtodoFileRecord, type MdtodoTaskMutationInput, type MdtodoTaskMutationResponse, type MdtodoTaskRecord, type ProjectNavigationResponse, type ProjectRecord, type ProjectSource, type ProjectSourceInput, type ProjectWorkbenchLinkRecord } from "./projectManagement";
 
 import { fetchJson } from "./client";
 import { accessAPI } from "./access";
diff --git a/web/hwlab-cloud-web/src/api/projectManagement.ts b/web/hwlab-cloud-web/src/api/projectManagement.ts
index 93961645..78ac0a08 100644
--- a/web/hwlab-cloud-web/src/api/projectManagement.ts
+++ b/web/hwlab-cloud-web/src/api/projectManagement.ts
@@ -103,6 +103,7 @@ export interface MdtodoTaskRecord {
   sourceId?: string;
   fileRef?: string;
   taskId?: string;
+  rxxId?: string;
   title?: string;
   status?: string;
   parentTaskRef?: string | null;
@@ -110,6 +111,9 @@ export interface MdtodoTaskRecord {
   lineNumber?: number;
   ordinal?: number;
   linkCount?: number;
+  sourceFingerprint?: string;
+  bodyPreview?: string;
+  parserMode?: string;
   updatedAt?: string;
 }
 
@@ -132,6 +136,24 @@ export interface ProjectSourceProbeResponse extends ProjectManagementEnvelope {
 export interface ProjectSourceReindexResponse extends ProjectManagementEnvelope { projection?: ProjectProjectionSummary & { sourceKind?: string; rootRef?: string; valuesRedacted?: boolean } }
 export interface MdtodoFileListResponse extends ProjectManagementEnvelope { files?: MdtodoFileRecord[] }
 export interface MdtodoTaskListResponse extends ProjectManagementEnvelope { tasks?: MdtodoTaskRecord[] }
+export interface MdtodoTaskMutationInput {
+  sourceId?: string;
+  fileRef?: string;
+  parentTaskRef?: string;
+  afterTaskRef?: string;
+  expectedFingerprint?: string;
+  revision?: string;
+  title?: string;
+  status?: string;
+  body?: string;
+}
+export interface MdtodoTaskMutationResponse extends ProjectManagementEnvelope {
+  task?: MdtodoTaskRecord | null;
+  changedTaskId?: string | null;
+  affectedTaskIds?: string[];
+  file?: MdtodoFileRecord & { parserMode?: string; valuesRedacted?: boolean };
+  projection?: ProjectProjectionSummary;
+}
 export interface ProjectWorkbenchLinkListResponse extends ProjectManagementEnvelope { links?: ProjectWorkbenchLinkRecord[] }
 
 export interface MdtodoTaskQuery {
@@ -156,6 +178,9 @@ export const projectManagementAPI = {
   reindexSource: (sourceId: string): Promise<ApiResult<ProjectSourceReindexResponse>> => fetchJson(`/v1/project-management/mdtodo/sources/${encodeURIComponent(sourceId)}/reindex`, { method: "POST", body: JSON.stringify({}), timeoutMs: 12000, timeoutName: "project mdtodo source reindex" }),
   files: (sourceId?: string | null): Promise<ApiResult<MdtodoFileListResponse>> => fetchJson(`/v1/project-management/mdtodo/files${queryString({ sourceId })}`, { timeoutMs: 12000, timeoutName: "project mdtodo files" }),
   tasks: (query: MdtodoTaskQuery = {}): Promise<ApiResult<MdtodoTaskListResponse>> => fetchJson(`/v1/project-management/mdtodo/tasks${queryString({ sourceId: query.sourceId, fileRef: query.fileRef, projectId: query.projectId })}`, { timeoutMs: 12000, timeoutName: "project mdtodo tasks" }),
+  updateTask: (taskRef: string, input: MdtodoTaskMutationInput): Promise<ApiResult<MdtodoTaskMutationResponse>> => fetchJson(`/v1/project-management/mdtodo/tasks/${encodeURIComponent(taskRef)}`, { method: "PATCH", body: JSON.stringify(input), timeoutMs: 12000, timeoutName: "project mdtodo task update" }),
+  createTask: (input: MdtodoTaskMutationInput): Promise<ApiResult<MdtodoTaskMutationResponse>> => fetchJson("/v1/project-management/mdtodo/tasks", { method: "POST", body: JSON.stringify(input), timeoutMs: 12000, timeoutName: "project mdtodo task create" }),
+  deleteTask: (taskRef: string, input: MdtodoTaskMutationInput): Promise<ApiResult<MdtodoTaskMutationResponse>> => fetchJson(`/v1/project-management/mdtodo/tasks/${encodeURIComponent(taskRef)}`, { method: "DELETE", body: JSON.stringify(input), timeoutMs: 12000, timeoutName: "project mdtodo task delete" }),
   workbenchLinks: (query: ProjectWorkbenchLinkQuery = {}): Promise<ApiResult<ProjectWorkbenchLinkListResponse>> => fetchJson(`/v1/project-management/workbench-links${queryString({ taskRef: query.taskRef, projectId: query.projectId, sessionId: query.sessionId })}`, { timeoutMs: 12000, timeoutName: "project workbench links" })
 };
 
diff --git a/web/hwlab-cloud-web/src/views/projects/MdtodoView.vue b/web/hwlab-cloud-web/src/views/projects/MdtodoView.vue
index ee455921..2b569495 100644
--- a/web/hwlab-cloud-web/src/views/projects/MdtodoView.vue
+++ b/web/hwlab-cloud-web/src/views/projects/MdtodoView.vue
@@ -4,7 +4,7 @@
 <script setup lang="ts">
 import { computed, onMounted, reactive, ref, watch } from "vue";
 import { useRouter } from "vue-router";
-import { projectManagementAPI, workbenchAPI, type MdtodoFileRecord, type MdtodoTaskRecord, type ProjectNavigationResponse, type ProjectSource, type ProjectSourceInput, type ProjectWorkbenchLinkRecord } from "@/api";
+import { projectManagementAPI, workbenchAPI, type MdtodoFileRecord, type MdtodoTaskMutationInput, type MdtodoTaskRecord, type ProjectNavigationResponse, type ProjectSource, type ProjectSourceInput, type ProjectWorkbenchLinkRecord } from "@/api";
 import EmptyState from "@/components/common/EmptyState.vue";
 import LoadingState from "@/components/common/LoadingState.vue";
 import PageHeader from "@/components/common/PageHeader.vue";
@@ -15,12 +15,15 @@ const loading = ref(false);
 const taskLoading = ref(false);
 const linkLoading = ref(false);
 const launchLoading = ref(false);
+const taskMutationLoading = ref(false);
 const sourceSaving = ref(false);
 const sourceProbeLoading = ref(false);
 const sourceReindexLoading = ref(false);
 const showInfo = ref(false);
 const showSourceConfig = ref(false);
 const launchError = ref<string | null>(null);
+const taskMutationError = ref<string | null>(null);
+const taskMutationMessage = ref<string | null>(null);
 const sourceMessage = ref<string | null>(null);
 const sourceError = ref<string | null>(null);
 const error = ref<string | null>(null);
@@ -37,6 +40,12 @@ const selectedTaskRef = ref<string | null>(null);
 const taskSearch = ref("");
 const taskStatusFilter = ref("all");
 const collapsedTaskRefs = ref<Set<string>>(new Set());
+const editTitle = ref("");
+const editStatus = ref("open");
+const editBody = ref("");
+const newTaskTitle = ref("");
+const newTaskBody = ref("");
+const deleteConfirm = ref(false);
 
 const sourceForm = reactive<ProjectSourceInput>({
   sourceId: "d601-f103-v2-mdtodo",
@@ -105,6 +114,8 @@ watch(selectedTaskRef, async (taskRef) => {
   await loadLinks(taskRef);
 });
 
+watch(selectedTask, (task) => resetTaskEditor(task), { immediate: true });
+
 async function loadPage(): Promise<void> {
   loading.value = true;
   error.value = null;
@@ -263,6 +274,100 @@ async function reindexSelectedSource(): Promise<void> {
   }
 }
 
+async function saveTaskBasics(): Promise<void> {
+  const task = selectedTask.value;
+  if (!task) return;
+  const input: MdtodoTaskMutationInput = { expectedFingerprint: taskFingerprint() };
+  if (editTitle.value.trim() && editTitle.value.trim() !== (task.title || "")) input.title = editTitle.value.trim();
+  if (editStatus.value && editStatus.value !== (task.status || "open")) input.status = editStatus.value;
+  if (!input.title && !input.status) {
+    taskMutationMessage.value = "任务标题和状态没有变化";
+    taskMutationError.value = null;
+    return;
+  }
+  await runTaskMutation(() => projectManagementAPI.updateTask(task.taskRef, input), task.taskRef, "任务已保存");
+}
+
+async function saveTaskBody(): Promise<void> {
+  const task = selectedTask.value;
+  if (!task) return;
+  await runTaskMutation(() => projectManagementAPI.updateTask(task.taskRef, { expectedFingerprint: taskFingerprint(), body: editBody.value }), task.taskRef, "正文已保存");
+}
+
+async function createTask(kind: "root" | "subtask" | "continue"): Promise<void> {
+  const title = newTaskTitle.value.trim();
+  if (!title) {
+    taskMutationError.value = "新任务标题不能为空";
+    taskMutationMessage.value = null;
+    return;
+  }
+  const task = selectedTask.value;
+  const input: MdtodoTaskMutationInput = {
+    sourceId: selectedSourceId.value || undefined,
+    fileRef: selectedFileRef.value || undefined,
+    expectedFingerprint: taskFingerprint(),
+    title,
+    body: newTaskBody.value
+  };
+  if (kind === "subtask" && task) input.parentTaskRef = task.taskRef;
+  if (kind === "continue" && task) input.afterTaskRef = task.taskRef;
+  await runTaskMutation(() => projectManagementAPI.createTask(input), undefined, "任务已创建");
+  if (!taskMutationError.value) {
+    newTaskTitle.value = "";
+    newTaskBody.value = "";
+  }
+}
+
+async function deleteSelectedTask(): Promise<void> {
+  const task = selectedTask.value;
+  if (!task) return;
+  if (!deleteConfirm.value) {
+    deleteConfirm.value = true;
+    taskMutationMessage.value = "再次点击确认删除当前任务及子任务";
+    taskMutationError.value = null;
+    return;
+  }
+  await runTaskMutation(() => projectManagementAPI.deleteTask(task.taskRef, { expectedFingerprint: taskFingerprint() }), undefined, "任务已删除");
+  deleteConfirm.value = false;
+}
+
+async function runTaskMutation(action: () => ReturnType<typeof projectManagementAPI.updateTask>, preferredTaskRef: string | undefined, message: string): Promise<void> {
+  const sourceId = selectedSourceId.value;
+  if (!sourceId) return;
+  const expectedFingerprint = taskFingerprint();
+  if (!expectedFingerprint) {
+    taskMutationError.value = "当前文件缺少 revision/fingerprint，不能写入";
+    taskMutationMessage.value = null;
+    return;
+  }
+  taskMutationLoading.value = true;
+  taskMutationError.value = null;
+  taskMutationMessage.value = null;
+  try {
+    const response = await action();
+    if (!response.ok) throw response;
+    const nextTaskRef = response.data?.task?.taskRef || preferredTaskRef;
+    await loadFilesAndTasks(sourceId);
+    if (nextTaskRef && tasks.value.some((task) => task.taskRef === nextTaskRef)) selectedTaskRef.value = nextTaskRef;
+    taskMutationMessage.value = message;
+  } catch (err) {
+    taskMutationError.value = projectApiError(err).error;
+  } finally {
+    taskMutationLoading.value = false;
+  }
+}
+
+function taskFingerprint(): string | undefined {
+  return selectedTask.value?.sourceFingerprint || selectedFile.value?.fingerprint || undefined;
+}
+
+function resetTaskEditor(task: MdtodoTaskRecord | null): void {
+  editTitle.value = task?.title || "";
+  editStatus.value = task?.status || "open";
+  editBody.value = "";
+  deleteConfirm.value = false;
+}
+
 async function launchSelectedTask(): Promise<void> {
   const task = selectedTask.value;
   if (!task || !task.taskRef || !task.projectId || launchButtonDisabled.value) return;
@@ -410,6 +515,35 @@ function displayDate(value?: string | null): string {
               <div><dt>File</dt><dd><code>{{ selectedFile?.relativePath || selectedTask.fileRef || '-' }}</code></dd></div>
               <div><dt>Updated</dt><dd>{{ displayDate(selectedTask.updatedAt) }}</dd></div>
             </dl>
+            <section class="task-editor" data-testid="mdtodo-task-editor">
+              <div class="editor-grid">
+                <label><span>Title</span><input v-model="editTitle" data-testid="mdtodo-edit-title" :disabled="taskMutationLoading" /></label>
+                <label><span>Status</span><select v-model="editStatus" data-testid="mdtodo-edit-status" :disabled="taskMutationLoading">
+                  <option value="open">待办</option>
+                  <option value="in_progress">进行中</option>
+                  <option value="done">完成</option>
+                  <option value="blocked">阻塞</option>
+                </select></label>
+              </div>
+              <button class="btn btn-secondary" type="button" data-testid="mdtodo-edit-save" :disabled="taskMutationLoading" @click="saveTaskBasics">保存标题/状态</button>
+              <label class="editor-block"><span>Replace body</span><textarea v-model="editBody" data-testid="mdtodo-edit-body" :disabled="taskMutationLoading" rows="4" placeholder="输入新的正文块；留空并保存会清空当前任务正文。" /></label>
+              <button class="btn btn-secondary" type="button" data-testid="mdtodo-edit-body-save" :disabled="taskMutationLoading" @click="saveTaskBody">保存正文</button>
+              <div class="task-create-box">
+                <label><span>New task</span><input v-model="newTaskTitle" data-testid="mdtodo-new-title" :disabled="taskMutationLoading" placeholder="新任务标题" /></label>
+                <textarea v-model="newTaskBody" data-testid="mdtodo-new-body" :disabled="taskMutationLoading" rows="3" placeholder="新任务正文，可留空。" />
+                <div class="editor-actions">
+                  <button class="btn btn-secondary" type="button" data-testid="mdtodo-add-root" :disabled="taskMutationLoading" @click="createTask('root')">新增根任务</button>
+                  <button class="btn btn-secondary" type="button" data-testid="mdtodo-add-subtask" :disabled="taskMutationLoading" @click="createTask('subtask')">新增子任务</button>
+                  <button class="btn btn-secondary" type="button" data-testid="mdtodo-continue-task" :disabled="taskMutationLoading" @click="createTask('continue')">延续同级</button>
+                </div>
+              </div>
+              <div class="editor-actions danger-actions">
+                <button class="btn btn-secondary" type="button" data-testid="mdtodo-delete-task" :disabled="taskMutationLoading" @click="deleteSelectedTask">{{ deleteConfirm ? '确认删除' : '删除任务' }}</button>
+                <button v-if="deleteConfirm" class="btn btn-secondary" type="button" data-testid="mdtodo-delete-cancel" :disabled="taskMutationLoading" @click="deleteConfirm = false">取消</button>
+              </div>
+              <p v-if="taskMutationMessage" class="source-message" data-testid="mdtodo-task-mutation-message">{{ taskMutationMessage }}</p>
+              <p v-if="taskMutationError" class="source-error" data-testid="mdtodo-task-mutation-error">{{ taskMutationError }}</p>
+            </section>
             <button class="btn btn-primary" type="button" data-testid="mdtodo-workbench-launch" :disabled="launchButtonDisabled" :aria-disabled="launchButtonDisabled" @click="launchSelectedTask">
               {{ launchLoading ? '启动中' : '在 Workbench 执行' }}
             </button>
@@ -508,6 +642,18 @@ function displayDate(value?: string | null): string {
 .task-detail-list dd,
 .summary-list dd { min-width: 0; margin: 0; overflow-wrap: anywhere; color: #14211d; font-size: 13px; }
 .task-detail-list code { color: #0f766e; font-size: 12px; }
+.task-editor { display: grid; gap: 10px; border: 1px solid #d8e2df; border-radius: 8px; background: #fbfefd; padding: 12px; }
+.editor-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(132px, 0.32fr); gap: 10px; }
+.task-editor label { display: grid; min-width: 0; gap: 5px; color: #52615c; font-size: 12px; font-weight: 800; }
+.task-editor input,
+.task-editor select,
+.task-editor textarea { width: 100%; min-width: 0; border: 1px solid #cbd8d4; border-radius: 6px; background: #fff; color: #14211d; font: inherit; padding: 8px 9px; }
+.task-editor textarea { min-height: 72px; resize: vertical; line-height: 1.4; }
+.editor-block { display: grid; gap: 5px; }
+.task-create-box { display: grid; gap: 8px; border-top: 1px solid #e2ece8; padding-top: 10px; }
+.editor-actions { display: flex; flex-wrap: wrap; gap: 8px; }
+.danger-actions { border-top: 1px solid #e2ece8; padding-top: 10px; }
+.danger-actions .btn { border-color: #fecaca; color: #991b1b; }
 .launch-blocker { margin: 0; color: #64706b; font-size: 12px; }
 .task-links { display: grid; gap: 8px; border-top: 1px solid #e2e8f0; padding-top: 10px; }
 .task-links header { display: flex; justify-content: space-between; gap: 10px; color: #14211d; font-size: 13px; }
@@ -532,6 +678,7 @@ function displayDate(value?: string | null): string {
 }
 @media (max-width: 640px) {
   .source-form { grid-template-columns: 1fr; }
+  .editor-grid { grid-template-columns: 1fr; }
   .task-row { grid-template-columns: minmax(48px, auto) minmax(0, 1fr); }
   .task-status { grid-column: 1 / -1; }
 }
diff --git a/web/hwlab-cloud-web/tests/workbench-e2e/specs/project-management.spec.ts b/web/hwlab-cloud-web/tests/workbench-e2e/specs/project-management.spec.ts
index 7675647b..a96c156e 100644
--- a/web/hwlab-cloud-web/tests/workbench-e2e/specs/project-management.spec.ts
+++ b/web/hwlab-cloud-web/tests/workbench-e2e/specs/project-management.spec.ts
@@ -40,6 +40,28 @@ test.describe("project management pages", () => {
     await page.getByTestId("mdtodo-source-reindex-dialog").click();
     await expect(page.getByTestId("mdtodo-source-message")).toContainText("Reindex 2 files / 4 tasks");
     await page.getByLabel("关闭配置").click();
+    await page.getByTestId("mdtodo-edit-title").fill("实现项目根导航 - edited");
+    await page.getByTestId("mdtodo-edit-status").selectOption("in_progress");
+    await page.getByTestId("mdtodo-edit-save").click();
+    await expect(page.getByTestId("mdtodo-task-mutation-message")).toContainText("任务已保存");
+    await expect(page.getByTestId("mdtodo-task-detail")).toContainText("实现项目根导航 - edited");
+    await expect(page.locator('[data-task-id="R1"]')).toContainText("进行中");
+    await page.getByTestId("mdtodo-edit-body").fill("Body saved from Playwright.");
+    await page.getByTestId("mdtodo-edit-body-save").click();
+    await expect(page.getByTestId("mdtodo-task-mutation-message")).toContainText("正文已保存");
+    await page.getByTestId("mdtodo-new-title").fill("Playwright child");
+    await page.getByTestId("mdtodo-new-body").fill("Child from E2E.");
+    await page.getByTestId("mdtodo-add-subtask").click();
+    await expect(page.getByTestId("mdtodo-task-mutation-message")).toContainText("任务已创建");
+    await expect(page.locator('[data-task-id="R1.2"]')).toContainText("Playwright child");
+    await page.getByTestId("mdtodo-new-title").fill("Playwright sibling");
+    await page.getByTestId("mdtodo-continue-task").click();
+    await expect(page.locator('[data-task-id="R1.3"]')).toContainText("Playwright sibling");
+    await page.getByTestId("mdtodo-delete-task").click();
+    await expect(page.getByTestId("mdtodo-task-mutation-message")).toContainText("再次点击确认删除");
+    await page.getByTestId("mdtodo-delete-task").click();
+    await expect(page.getByTestId("mdtodo-task-mutation-message")).toContainText("任务已删除");
+    await expect(page.locator('[data-task-id="R1.3"]')).toHaveCount(0);
     await expect(page.getByTestId("mdtodo-workbench-link-summary")).toContainText("ses_project_seed");
     await expect(page.getByTestId("mdtodo-workbench-launch")).toBeEnabled();
     await expect(page.locator("iframe")).toHaveCount(0);