diff --git a/src/devx/ci/auto_merge.py b/src/devx/ci/auto_merge.py
index 7e700b5..0fb4ea0 100644
--- a/src/devx/ci/auto_merge.py
+++ b/src/devx/ci/auto_merge.py
@@ -41,6 +41,9 @@ from devx.config import (
 from devx.exceptions import APIError
 from devx.i18n import _
 
+# Strip leading task ID prefix (e.g. "DEVX-12: " or "OBL-INFRA-364: ") from commit subjects.
+_TASK_ID_PREFIX_RE = re.compile(rf"^{TASK_PREFIX}-\d+:\s*")
+
 TASKID_FILE = ".taskid"  # Deprecated, kept for backward-compat warnings
 PR_TITLE_RE = re.compile(rf"^{TASK_PREFIX}-\d+:\s+.+")
 
@@ -168,19 +171,23 @@ def extract_conventional_msg(commits: list[dict[str, Any]]) -> str:
     for commit in reversed(commits):
         commit_info = commit.get("commit", {})
         message = str(commit_info.get("message", "") if isinstance(commit_info, dict) else "").split("\n")[0]
-        m = CONVENTIONAL_RE.match(message)
+        # Strip any leading task ID prefix (e.g. "OBL-INFRA-364: fix: ...") so
+        # conventional commit matching works on the remainder.
+        stripped = _TASK_ID_PREFIX_RE.sub("", message)
+        m = CONVENTIONAL_RE.match(stripped)
         if m:
             prefix = m.group(1).split("(")[0].strip()  # e.g. "feat" from "feat(scope)"
             score = priority.get(prefix, 0)
             if score > best_score:
                 best_score = score
-                best_msg = message
+                best_msg = stripped
     if best_msg:
         return best_msg
-    # Fallback: use the newest commit's first line
+    # Fallback: use the newest commit's first line (strip task ID prefix if present)
     if commits:
         commit_info = commits[-1].get("commit", {})
-        return str(commit_info.get("message", "") if isinstance(commit_info, dict) else "").split("\n")[0]
+        raw = str(commit_info.get("message", "") if isinstance(commit_info, dict) else "").split("\n")[0]
+        return _TASK_ID_PREFIX_RE.sub("", raw)
     return ""
 
 
diff --git a/tests/unit/test_auto_merge.py b/tests/unit/test_auto_merge.py
index 0e3352d..6c7db6e 100644
--- a/tests/unit/test_auto_merge.py
+++ b/tests/unit/test_auto_merge.py
@@ -218,6 +218,20 @@ class TestExtractConventionalMsg:
         ]
         assert extract_conventional_msg(commits) == "feat(api): add endpoint"
 
+    def test_strips_task_id_prefix(self) -> None:
+        """Commit messages with a task ID prefix should have it stripped."""
+        commits = [
+            {"commit": {"message": "DEVX-12: fix: resolve timeout"}},
+        ]
+        assert extract_conventional_msg(commits) == "fix: resolve timeout"
+
+    def test_strips_task_id_prefix_fallback(self) -> None:
+        """Fallback to newest commit should also strip task ID prefix."""
+        commits = [
+            {"commit": {"message": "DEVX-12: random message"}},
+        ]
+        assert extract_conventional_msg(commits) == "random message"
+
 
 # -- run_cmd --