diff --git a/Agent.md b/Agent.md
index a047db65..3c22aeca 100644
--- a/Agent.md
+++ b/Agent.md
@@ -85,7 +85,7 @@ Usage: say "tool loop" for the whole process, "round N" for a single LLM request
   - Streaming chat with delta rendering (16ms batching), markdown on done (marked + DOMPurify + local highlight.js subset), tool call status cards (2000-char truncation + expand)
   - Session list/switch/new/delete + right-click rename (context menu, #423) synced with daemon; own-stream busy lock (G65); broadcast streams from other clients tagged "来自其他客户端"
   - Disconnect/reconnect: red status dot, auto daemon respawn (stale-port detection), session resume, input bar restored on disconnect (no 30s fake-timeout)
-  - Unit tests `npm test` (257: 45 daemon_client + 19 conn-manager + 22 app-commands + 129 renderer smoke + 16 i18n + 7 integration + 3 commands + 7 build-config + 7 gui-state + 2 tool-group); RESPONSE_TYPES mirror daemon protocol verified against `daemon.py`
+  - Unit tests `npm test` (258: 45 daemon_client + 19 conn-manager + 22 app-commands + 129 renderer smoke + 16 i18n + 7 integration + 3 commands + 8 build-config + 7 gui-state + 2 tool-group); RESPONSE_TYPES mirror daemon protocol verified against `daemon.py`
 - **Scheduled tasks** — Task generalization + CRUD (rant 2026-08-12T18:23:15, #709/#710/#711)
   - Task handler generalized: `TaskHandler` (renamed from `EvolutionHandler`), repo-configured self-heal for any project, template lookup builtin → `~/.emrg/task-templates/<name>.md` → fallback
   - Daemon commands: `task_create/update/delete` + `task_template_create/list/update/delete` (tasks stored in `~/.emrg/tasks.yml`, custom type templates in `~/.emrg/task-templates/`)
@@ -119,7 +119,7 @@ pkill -f "emrg.server"; rm -f ~/.emrg/emrgd.port; python -m emrg
 ```
 
 Python: `uv run pytest tests/ -v` (933) — import check: `uv run python -c "from emrg.client.app import run_client"`
-GUI: `cd emrg/gui && npm test` (257: 45 daemon_client + 19 conn-manager + 22 app-commands + 129 renderer smoke + 16 i18n + 7 integration + 3 commands + 7 build-config + 7 gui-state + 2 tool-group) — syntax: `node --check main.js preload.js daemon_client.js renderer/js/*.js`
+GUI: `cd emrg/gui && npm test` (258: 45 daemon_client + 19 conn-manager + 22 app-commands + 129 renderer smoke + 16 i18n + 7 integration + 3 commands + 8 build-config + 7 gui-state + 2 tool-group) — syntax: `node --check main.js preload.js daemon_client.js renderer/js/*.js`
 CI: `uv run pytest` (ubuntu + **windows-2025 matrix** — Windows pytest 回归在 PR CI 即失败，v0.2.29 教训 #725) + GUI tests + **actionlint workflow lint** (`rhysd/actionlint@v1.7.12` gate, #444 — workflow 解析错误在 PR CI 即失败，如 `if:` secrets 上下文)
 Re-trigger: `scripts/re-trigger-ci.sh [branch]` (workflow_dispatch, #527 — 替代空 commit 重触发：Actions outage 会整段丢弃 push 事件，dispatch 走 API 路径不受影响)
 
diff --git a/emrg/gui/package.json b/emrg/gui/package.json
index d34b57d1..bdadc285 100644
--- a/emrg/gui/package.json
+++ b/emrg/gui/package.json
@@ -91,6 +91,8 @@
       "allowToChangeInstallationDirectory": true,
       "perMachine": false
     },
-    "buildResources": "../packaging/assets"
+    "directories": {
+      "buildResources": "../packaging/assets"
+    }
   }
 }
diff --git a/emrg/gui/test/build-config.test.js b/emrg/gui/test/build-config.test.js
index 0be335ad..c7171115 100644
--- a/emrg/gui/test/build-config.test.js
+++ b/emrg/gui/test/build-config.test.js
@@ -147,3 +147,31 @@ test("preload exposes workspace-panel APIs (listFiles/readFile)", () => {
     assert.match(main, new RegExp(`ipcMain\\.handle\\("${channel}"`), `main.js must handle ${channel}`);
   }
 });
+
+
+// ── rant 2026-08-18T12:45:47 (v0.2.47 Build Release) ──
+// #836 把 buildResources 放在 electron-builder config 根级 → schema 校验失败
+// （"configuration has an unknown property 'buildResources'"）→ 4/4 build jobs 全红。
+// 正确位置是 directories.buildResources。Test CI 不跑 electron-builder，只有打包会炸 ——
+// 本守卫在 PR 阶段钉死该 schema 约束，防止再次放行。
+test("electron-builder config: buildResources lives under directories (schema guard, rant 12:45:47)", () => {
+  const build = PKG.build || {};
+  assert.ok(
+    !Object.prototype.hasOwnProperty.call(build, "buildResources"),
+    `buildResources must NOT be at config root — electron-builder rejects unknown property ` +
+      `(v0.2.47 Build Release 4/4 failure). Place it under directories.buildResources. ` +
+      `Actual root keys: ${JSON.stringify(Object.keys(build))}`
+  );
+  assert.strictEqual(
+    build.directories && build.directories.buildResources,
+    "../packaging/assets",
+    "directories.buildResources must point at ../packaging/assets (icon.icns/ico/png sources)"
+  );
+  // icon.icns/ico/png are gen-assets products (gitignored, generated at build time from
+  // icon.svg by packaging/gen-assets.sh) — only the committed design source must exist in CI.
+  const assetsDir = path.join(GUI_ROOT, "..", "..", "packaging", "assets");
+  assert.ok(
+    fs.existsSync(path.join(assetsDir, "icon.svg")),
+    `buildResources dir missing design source icon.svg (committed) — gen-assets can't render icons`
+  );
+});