diff --git a/.env.example b/.env.example
index f28b97f..000f426 100644
--- a/.env.example
+++ b/.env.example
@@ -51,7 +51,7 @@ GITEA_REGISTRATION_TOKEN=your-registration-token
 # Used by PIP_INSTALL to configure PIP_EXTRA_INDEX_URL
 CI_GITEA_USERNAME=your-gitea-username
 
-# Role-based Gitea API tokens (devx 0.38.0+)
+# Role-based Gitea API tokens (devx 0.40.0+)
 # DEVELOPER_GITEA_API_TOKEN is used by local `grm trigger-workflow` and `make create-pr`.
 # CI_GITEA_API_TOKEN is used by CI workflows (and accepted as a fallback for local tools).
 # REVIEWER_GITEA_API_TOKEN is used by CI to post APPROVE reviews; it must belong to a
diff --git a/AGENTS.md b/AGENTS.md
index 30ddcc3..ae76154 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -84,6 +84,12 @@ as a defense-in-depth measure, but branch protection is the primary gate.
 ### 1. Create Vikunja Task
 Create a task in Vikunja project 6 via `make create-task -- --title "Task title" --description "<h2>...</h2>"` (requires `VIKUNJA_TOKEN` in `.env`). This prints the `GRM-N` identifier and next-step instructions.
 
+**IMPORTANT:** The task title must NOT include the `GRM-N:` prefix.
+The `make create-pr` and `check_auto_merge_ready` commands automatically
+prepend `GRM-N: ` to the Vikunja task title when forming the PR title.
+If the Vikunja task title already includes the prefix, the PR title will
+have a double prefix and auto-merge validation will fail.
+
 ### 2. Create Branch
 ```bash
 git checkout master && git pull
diff --git a/pyproject.toml b/pyproject.toml
index 4b2382c..26d6d46 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ ci = [
     "build==1.5.0",
     "twine==6.2.0",
     # Reusable CI/CD and dev tools (auto-merge, pr-review, pre-push checks, etc.)
-    "devx==0.38.0",
+    "devx==0.40.0",
 ]
 # Lint and type-checking tools (quality job)
 lint = [
@@ -54,7 +54,7 @@ molecule = [
 dev = [
     "grm[ci,lint,molecule]",
     # Reusable CI/CD and dev tools (pre-push hooks, create-task, create-pr)
-    "devx==0.38.0",
+    "devx==0.40.0",
     # Non-Python dev dependency: checkmake (Makefile linter)
     # Install via: go install github.com/checkmake/checkmake/cmd/checkmake@latest
 ]