diff --git a/.planning/STATE.md b/.planning/STATE.md
index adbe6ec..80cee34 100644
--- a/.planning/STATE.md
+++ b/.planning/STATE.md
@@ -86,6 +86,11 @@ Phase 11: Documentation Overhaul      [          ] Pending
 
 - **Batch Update via inline keyboard** — Route Batch Loop Action "update" output is not connected. The update sequence (pull→stop→remove→create→start) is too complex to inline in the batch loop. Will be trivial once workflow is modularized into sub-workflows.
 
+### Known Limitations (64-byte callback_data)
+
+- **Long container names** — Telegram's 64-byte callback_data limit causes issues with long container names in batch operations
+- **Batch select limited to ~2 containers** — The `batch:toggle:{page}:{selected}:{name}` format hits the 64-byte limit quickly with multiple selections. Consider: short IDs instead of names, or storing selection state server-side in Phase 9.1
+
 ## Session Continuity
 
 - **Last session:** 2026-02-04