diff --git a/.trellis/spec/hyb-oa/project-governance.md b/.trellis/spec/hyb-oa/project-governance.md
index cf9a62d7..149f8fcf 100644
--- a/.trellis/spec/hyb-oa/project-governance.md
+++ b/.trellis/spec/hyb-oa/project-governance.md
@@ -101,6 +101,8 @@ rollback and future self-maintenance.
   one deliberately.
 - Post-upgrade dry-run changes manifest again -> investigate template hash drift
   before commit.
+- No active task directory after the last task is archived -> valid idle state;
+  governance still checks core files, docs registration and sensitive content.
 - Only documented project overlays remain modified -> acceptable after task and
   governance gates pass.
 
@@ -118,6 +120,8 @@ rollback and future self-maintenance.
 - Assert CLI and project versions match the intended target.
 - Compile every Python file under `.trellis/scripts` and `.codex/hooks`.
 - Exercise task validate/current/list and run Trellis governance.
+- Archive the final active task and assert Trellis governance still passes with
+  zero active task directories.
 - Confirm no `.new`, backup, bytecode or out-of-scope platform assets are
   tracked; finish with `git diff --check`.
 
diff --git a/.trellis/tasks/archive/2026-07/07-26-trellis-upgrade-project-audit/research/current-state-audit.md b/.trellis/tasks/archive/2026-07/07-26-trellis-upgrade-project-audit/research/current-state-audit.md
index f1b12eba..dd435bfe 100644
--- a/.trellis/tasks/archive/2026-07/07-26-trellis-upgrade-project-audit/research/current-state-audit.md
+++ b/.trellis/tasks/archive/2026-07/07-26-trellis-upgrade-project-audit/research/current-state-audit.md
@@ -16,6 +16,7 @@
 - 四个冲突文件按设计完成合并，保留 Trellis-first overlay、Codex inline、禁止自动提交和 `workspace/` 忽略规则；未保留 `.new` 冲突副本。
 - 0.6.9 runtime 的 `task_context.py` 包含 Python 3.9.2 不接受的嵌套多行 f-string；已改为先构造 warning 再着色，并通过全量 compileall 与 task runtime 验证。
 - 升级后 dry-run 不再改变 manifest，仅报告 `task_context.py`、`config.yaml`、`.gitignore`、`workflow.md`、`AGENTS.md` 五个有意保留的项目定制。
+- 归档最后一个 active task 后，治理检查器曾将正常 idle 状态误报为 `tasks.none`；已调整为允许零个 active task，并增加单元回归测试。
 
 ### 升级前版本与差异
 
diff --git a/scripts/qa/check-trellis-governance.mjs b/scripts/qa/check-trellis-governance.mjs
index f1bebaa5..aa1fa286 100644
--- a/scripts/qa/check-trellis-governance.mjs
+++ b/scripts/qa/check-trellis-governance.mjs
@@ -97,6 +97,19 @@ export function contextManifestPolicy(dispatchMode) {
   };
 }
 
+export function activeTaskDirectoryPolicy(taskCount) {
+  if (taskCount === 0) {
+    return {
+      valid: true,
+      detail: "0 active task directories; idle state after archive is valid",
+    };
+  }
+  return {
+    valid: true,
+    detail: `${taskCount} task directories have Trellis contracts`,
+  };
+}
+
 function checkContextManifest(result, taskDir, action, dispatchMode) {
   const relativePath = `${taskDir}/${action}.jsonl`;
   const policy = contextManifestPolicy(dispatchMode);
@@ -209,7 +222,8 @@ function checkTaskContracts(result) {
   const config = exists(".trellis/config.yaml") ? readText(".trellis/config.yaml") : "";
   const dispatchMode = /dispatch_mode:\s*sub-agent\b/.test(config) ? "sub-agent" : "inline";
   if (taskDirs.length === 0) {
-    fail(result, "tasks.none", "no .trellis/tasks/* directories found");
+    const policy = activeTaskDirectoryPolicy(taskDirs.length);
+    pass(result, "task_contracts", policy.detail);
     return;
   }
 
@@ -251,7 +265,10 @@ function checkTaskContracts(result) {
     checkContextManifest(result, dir, "implement", dispatchMode);
     checkContextManifest(result, dir, "check", dispatchMode);
   }
-  if (result.status === "PASS") pass(result, "task_contracts", `${taskDirs.length} task directories have Trellis contracts`);
+  if (result.status === "PASS") {
+    const policy = activeTaskDirectoryPolicy(taskDirs.length);
+    pass(result, "task_contracts", policy.detail);
+  }
 }
 
 function checkDocsRegistration(result) {
diff --git a/server/tests/unit/scripts/check-trellis-governance.test.js b/server/tests/unit/scripts/check-trellis-governance.test.js
index f672b2bf..1f1ac741 100644
--- a/server/tests/unit/scripts/check-trellis-governance.test.js
+++ b/server/tests/unit/scripts/check-trellis-governance.test.js
@@ -24,4 +24,11 @@ describe("Trellis context manifest governance", () => {
       rejectSeedRows: true,
     });
   });
+
+  it("accepts the idle state after the last active task is archived", () => {
+    expect(governance.activeTaskDirectoryPolicy(0)).toEqual({
+      valid: true,
+      detail: "0 active task directories; idle state after archive is valid",
+    });
+  });
 });