trellis-governance-closeout 收口旧任务并统一 Trellis-only 治理

.trellis/tasks/archive/2026-05/00-bootstrap-guidelines/design.md

@@ -0,0 +1,5 @@
+# Bootstrap Design
+
+This is the generated Trellis bootstrap task. hyb-oa keeps it as historical
+setup evidence, while project-specific rules live in `.trellis/spec/hyb-oa/`.
+TRELLIS2 supersedes the old Issue CSV binding requirement for new tasks.