diff --git a/.trellis/tasks/08-05-cesium-preview-controls/check.jsonl b/.trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/check.jsonl
similarity index 100%
rename from .trellis/tasks/08-05-cesium-preview-controls/check.jsonl
rename to .trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/check.jsonl
diff --git a/.trellis/tasks/08-05-cesium-preview-controls/design.md b/.trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/design.md
similarity index 100%
rename from .trellis/tasks/08-05-cesium-preview-controls/design.md
rename to .trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/design.md
diff --git a/.trellis/tasks/08-05-cesium-preview-controls/implement.jsonl b/.trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/implement.jsonl
similarity index 100%
rename from .trellis/tasks/08-05-cesium-preview-controls/implement.jsonl
rename to .trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/implement.jsonl
diff --git a/.trellis/tasks/08-05-cesium-preview-controls/implement.md b/.trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/implement.md
similarity index 100%
rename from .trellis/tasks/08-05-cesium-preview-controls/implement.md
rename to .trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/implement.md
diff --git a/.trellis/tasks/08-05-cesium-preview-controls/prd.md b/.trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/prd.md
similarity index 100%
rename from .trellis/tasks/08-05-cesium-preview-controls/prd.md
rename to .trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/prd.md
diff --git a/.trellis/tasks/08-05-cesium-preview-controls/task.json b/.trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/task.json
similarity index 89%
rename from .trellis/tasks/08-05-cesium-preview-controls/task.json
rename to .trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/task.json
index cd5cc3a..2c69477 100644
--- a/.trellis/tasks/08-05-cesium-preview-controls/task.json
+++ b/.trellis/tasks/archive/2026-08/08-05-cesium-preview-controls/task.json
@@ -3,7 +3,7 @@
   "name": "cesium-preview-controls",
   "title": "Cesium preview controls",
   "description": "",
-  "status": "in_progress",
+  "status": "completed",
   "dev_type": null,
   "scope": null,
   "package": null,
@@ -11,7 +11,7 @@
   "creator": "dingkang",
   "assignee": "dingkang",
   "createdAt": "2026-08-05",
-  "completedAt": null,
+  "completedAt": "2026-08-05",
   "branch": null,
   "base_branch": "main",
   "worktree_path": null,