diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1f3b2c22..a5385647 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## 0.71.2 — 2026-10-03
+
+### 修正
+
+- `todo dashboard ensure` が、登録簿のlock待ち切れ（`DASHBOARD_REGISTRY_BUSY`）やdaemonの無応答
+  （`DASHBOARD_DAEMON_UNRESPONSIVE`）などを `INTERNAL_FAILURE` とstackの抜粋で返していた。
+  登録簿とdaemonの故障はcodeと `detail`（`reason`・`next_action`）を持つtyped errorとして返す。
+  再実行で解ける種類は `next_action` に `lattice todo dashboard ensure --json` を示す。
+- 登録簿のJSONが壊れている時のmessageから、localの絶対pathを外した。
+
 ## 0.71.1 — 2026-10-03
 
 ### 修正
diff --git a/package-lock.json b/package-lock.json
index 894b7bd1..c723ffa4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@quolu/lattice",
-  "version": "0.71.1",
+  "version": "0.71.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@quolu/lattice",
-      "version": "0.71.1",
+      "version": "0.71.2",
       "license": "PolyForm-Noncommercial-1.0.0",
       "dependencies": {
         "@clack/prompts": "^1.3.0",
diff --git a/package.json b/package.json
index 9f865b3d..b761edc7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@quolu/lattice",
-  "version": "0.71.1",
+  "version": "0.71.2",
   "description": "Schedulability compiler for multi-agent development: observe real code boundaries, refactor the conflicting seam, recompile the plan for parallel execution",
   "author": {
     "name": "Quo / クオ at kitepon.dev",
diff --git a/src/todo-dashboard-registry.mjs b/src/todo-dashboard-registry.mjs
index 767d2f4f..bc7b3ae5 100644
--- a/src/todo-dashboard-registry.mjs
+++ b/src/todo-dashboard-registry.mjs
@@ -68,16 +68,12 @@ function validateRegistry(value) {
   if (value === null || typeof value !== 'object' || Array.isArray(value)
     || value.schema !== REGISTRY_SCHEMA || !Array.isArray(value.projects)
     || !value.projects.every(validEntry)) {
-    const error = new Error('dashboard registry schema invalid');
-    error.code = 'DASHBOARD_REGISTRY_INVALID';
-    throw error;
+    throw dashboardError('DASHBOARD_REGISTRY_INVALID', 'dashboard registry schema invalid', { retry: false });
   }
   const ids = new Set();
   for (const entry of value.projects) {
     if (ids.has(entry.project_id)) {
-      const error = new Error(`dashboard project duplicate: ${entry.project_id}`);
-      error.code = 'DASHBOARD_REGISTRY_INVALID';
-      throw error;
+      throw dashboardError('DASHBOARD_REGISTRY_INVALID', `dashboard project duplicate: ${entry.project_id}`, { retry: false });
     }
     ids.add(entry.project_id);
   }
@@ -91,12 +87,25 @@ async function readJson(ref, missing) {
     throw error;
   }
   try { return JSON.parse(bytes); } catch {
-    const error = new Error(`invalid JSON: ${ref}`);
-    error.code = 'DASHBOARD_REGISTRY_INVALID';
-    throw error;
+    // local absolute pathをCLI errorへ運ばない。どのfileかは登録簿の置き場から決まる。
+    throw dashboardError('DASHBOARD_REGISTRY_INVALID', 'dashboard registry file is not valid JSON', { retry: false });
   }
 }
 
+/**
+ * 登録簿とdaemonの故障は、外部状態（別process・file・負荷）の不整合であって内部故障ではない。
+ * codeだけのErrorはCLIのtyped契約（code＋detail）に乗らず`INTERNAL_FAILURE`へ落ちていた
+ * ——launchdの`todo dashboard ensure`が、負荷時のlock待ち切れやdaemonの無応答をそう返していた。
+ * detailを必ず持たせ、再実行で解ける種類かどうかを`next_action`で伝える。
+ */
+function dashboardError(code, message, { retry = true } = {}) {
+  const error = new Error(message);
+  error.code = code;
+  error.detail = { reason: code.toLowerCase(),
+    next_action: retry ? 'lattice todo dashboard ensure --json' : null };
+  return error;
+}
+
 async function atomicJson(ref, value) {
   const temporary = `${ref}.${process.pid}.${randomBytes(8).toString('hex')}.tmp`;
   await writeFile(temporary, `${JSON.stringify(value)}\n`, { encoding: 'utf8', mode: 0o600, flag: 'wx', flush: true });
@@ -131,9 +140,7 @@ async function withLock(lockRef, action) {
       await new Promise((resolve) => setTimeout(resolve, LOCK_WAIT_MS));
     }
   }
-  const error = new Error('dashboard registry lock timeout');
-  error.code = 'DASHBOARD_REGISTRY_BUSY';
-  throw error;
+  throw dashboardError('DASHBOARD_REGISTRY_BUSY', 'dashboard registry lock timeout');
 }
 
 export async function readActiveTodoDashboardProjects({ env = process.env, now = Date.now() } = {}) {
@@ -414,15 +421,11 @@ async function stopAttestedLegacyDaemon(descriptor, {
   const attestation = await daemonAttestation(descriptor);
   if (attestation !== 'legacy') {
     if (!await isProcessAlive(descriptor.pid) && attestation === null) return;
-    const error = new Error('legacy dashboard daemon attestation was lost before signal');
-    error.code = 'DASHBOARD_LEGACY_ATTESTATION_LOST';
-    throw error;
+    throw dashboardError('DASHBOARD_LEGACY_ATTESTATION_LOST', 'legacy dashboard daemon attestation was lost before signal');
   }
   if (!await requestDaemonShutdown(descriptor)) signalProcess(descriptor.pid, 'SIGTERM');
   if (await awaitDaemonStopped(descriptor, { isProcessAlive, deadline: Date.now() + timeoutMs })) return;
-  const error = new Error('legacy dashboard daemon did not stop');
-  error.code = 'DASHBOARD_LEGACY_STOP_FAILED';
-  throw error;
+  throw dashboardError('DASHBOARD_LEGACY_STOP_FAILED', 'legacy dashboard daemon did not stop');
 }
 
 /**
@@ -444,9 +447,7 @@ async function stopStrayDaemon(descriptor, {
   if (await awaitDaemonStopped(descriptor, {
     isProcessAlive, deadline: Date.now() + (timeoutMs - half),
   })) return true;
-  const error = new Error('stray dashboard daemon did not stop');
-  error.code = 'DASHBOARD_ORPHAN_STOP_FAILED';
-  throw error;
+  throw dashboardError('DASHBOARD_ORPHAN_STOP_FAILED', 'stray dashboard daemon did not stop');
 }
 
 /**
@@ -493,9 +494,7 @@ async function stopSpawnedReplacement(child, descriptor, {
     if (await stopped()) return;
     await new Promise((resolve) => setTimeout(resolve, 50));
   }
-  const error = new Error('replacement dashboard daemon rollback did not stop');
-  error.code = 'DASHBOARD_REPLACEMENT_ROLLBACK_FAILED';
-  throw error;
+  throw dashboardError('DASHBOARD_REPLACEMENT_ROLLBACK_FAILED', 'replacement dashboard daemon rollback did not stop');
 }
 
 function currentDaemonRecord(port) {
@@ -545,9 +544,7 @@ export async function ensureTodoDashboardDaemon({ env = process.env, spawnDaemon
     if (validDaemonDescriptor(existing) && existingAttestation === null
       && await isProcessAlive(existing.pid)
       && !await descriptorPidWasReused(existing, { observeProcessStartEpochMs })) {
-      const error = new Error('dashboard daemon is alive but temporarily unresponsive');
-      error.code = 'DASHBOARD_DAEMON_UNRESPONSIVE';
-      throw error;
+      throw dashboardError('DASHBOARD_DAEMON_UNRESPONSIVE', 'dashboard daemon is alive but temporarily unresponsive');
     }
     let legacy = existingAttestation === 'legacy' ? existing : null;
     if (legacy === null) {
@@ -610,9 +607,7 @@ export async function ensureTodoDashboardDaemon({ env = process.env, spawnDaemon
     }
     child.kill?.('SIGTERM');
     if (legacy === null) await rm(refs.descriptor, { force: true });
-    const error = new Error('dashboard daemon did not become ready');
-    error.code = 'DASHBOARD_DAEMON_UNAVAILABLE';
-    throw error;
+    throw dashboardError('DASHBOARD_DAEMON_UNAVAILABLE', 'dashboard daemon did not become ready');
   });
 }
 
@@ -634,9 +629,7 @@ export async function ensureTodoDashboardActivity(options) {
     if (!visible) await new Promise((resolve) => setTimeout(resolve, 50));
   }
   if (!visible) {
-    const error = new Error('registered project did not become visible');
-    error.code = 'DASHBOARD_PROJECT_UNAVAILABLE';
-    throw error;
+    throw dashboardError('DASHBOARD_PROJECT_UNAVAILABLE', 'registered project did not become visible');
   }
   return { ...registered, host: '127.0.0.1', port: daemon.port,
     url: `http://127.0.0.1:${daemon.port}/projects/${encodeURIComponent(registered.projectId)}/` };
diff --git a/test/todo-dashboard-typed-errors.test.mjs b/test/todo-dashboard-typed-errors.test.mjs
new file mode 100644
index 00000000..c3dd48a5
--- /dev/null
+++ b/test/todo-dashboard-typed-errors.test.mjs
@@ -0,0 +1,59 @@
+import assert from 'node:assert/strict';
+import { spawnSync } from 'node:child_process';
+import { mkdir, mkdtemp, readdir, rm, writeFile } from 'node:fs/promises';
+import { tmpdir } from 'node:os';
+import path from 'node:path';
+import test from 'node:test';
+import { fileURLToPath } from 'node:url';
+
+import { ensureTodoDashboardDaemon } from '../src/todo-dashboard-registry.mjs';
+
+const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), '..');
+const cliPath = path.join(repoRoot, 'bin', 'lattice.mjs');
+
+// 生きているprocess（この試験自身）が握ったままの新しいlock。待つ側は待ち切れで終わる。
+async function holdLocks(runtime) {
+  await mkdir(runtime, { recursive: true, mode: 0o700 });
+  const held = `${JSON.stringify({ pid: process.pid, created_at: new Date().toISOString() })}\n`;
+  for (const name of ['registry.lock', 'daemon-start.lock']) {
+    await writeFile(path.join(runtime, name), held, { mode: 0o600 });
+  }
+}
+
+test('登録簿とdaemonの故障はcodeとdetailを持つ（CLIのtyped契約に乗る）', async (t) => {
+  const root = await mkdtemp(path.join(tmpdir(), 'lattice-dashboard-typed-'));
+  t.after(() => rm(root, { recursive: true, force: true }));
+  const runtime = path.join(root, 'runtime');
+  await holdLocks(runtime);
+  await assert.rejects(
+    ensureTodoDashboardDaemon({ env: { LATTICE_DASHBOARD_RUNTIME_DIR: runtime },
+      spawnDaemon() { throw new Error('must not spawn'); } }),
+    (error) => {
+      assert.equal(error.code, 'DASHBOARD_REGISTRY_BUSY');
+      assert.deepEqual(error.detail, { reason: 'dashboard_registry_busy',
+        next_action: 'lattice todo dashboard ensure --json' });
+      return true;
+    },
+  );
+});
+
+test('todo dashboard ensureはlockの待ち切れをINTERNAL_FAILUREでなくDASHBOARD_REGISTRY_BUSYで返す', async (t) => {
+  const root = await mkdtemp(path.join(tmpdir(), 'lattice-dashboard-typed-cli-'));
+  t.after(() => rm(root, { recursive: true, force: true }));
+  const runtime = path.join(root, 'runtime');
+  await holdLocks(runtime);
+  // このrepository自身のtodo storeを読む（読むだけ）。lockを取れないのでdaemonは起動しない。
+  const result = spawnSync(process.execPath, [cliPath, 'todo', 'dashboard', 'ensure', '--json'], {
+    cwd: repoRoot, encoding: 'utf8',
+    env: { ...process.env, NO_COLOR: '1', LATTICE_DASHBOARD_RUNTIME_DIR: runtime,
+      LATTICE_TODO_ACTOR_HOST: 'fixture-host', LATTICE_TODO_ACTOR_SESSION: 'fixture-session',
+      LATTICE_TODO_ACTOR_AGENT: 'fixture-agent' },
+  });
+  assert.equal(result.status, 1, result.stderr);
+  const error = JSON.parse(result.stderr.trim().split('\n').at(-1));
+  assert.equal(error.schema, 'lattice.cli_error.v2');
+  assert.equal(error.code, 'DASHBOARD_REGISTRY_BUSY');
+  assert.equal(error.detail.next_action, 'lattice todo dashboard ensure --json');
+  assert.equal(Object.hasOwn(error.detail, 'stack_excerpt'), false);
+  assert.deepEqual((await readdir(runtime)).sort(), ['daemon-start.lock', 'registry.lock']);
+});