diff --git a/AGENTS.md b/AGENTS.md
index 4a30b19..fd7d576 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -2,6 +2,13 @@
 
 This documentation workspace uses Taskmaster as the source of truth for agent work.
 
+## Repository Rules
+
+- Repository-wide operating rules live in `../RTK.md`; follow them in addition to this file.
+- For product or code changes that affect frontend or backend, keep `frontend` and `backend` package versions/build numbers bumped together and synchronized unless the user explicitly asks otherwise.
+- Preserve Telegram Mini App auth retry behavior: `/api/auth/telegram` must accept repeated valid `initData` for the same launch session; replay rejection belongs only on one-time routes such as webhook/session creation.
+- In the final response, mention version/build bumps and verification commands when they were part of the work.
+
 ## Taskmaster Workflow
 
 - Before choosing implementation or documentation work, run `task-master next` from the repository root.