修复 Trellis 空闲态治理检查（07-26-trellis-upgrade-project-audit）

.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`.
 

.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