diff --git a/agent/auto_merge.py b/agent/auto_merge.py
new file mode 100644
index 0000000..84e1d66
--- /dev/null
+++ b/agent/auto_merge.py
@@ -0,0 +1,61 @@
+"""E2E 조건부 자동 머지 로직.
+
+autonomous 모드에서 조건을 검증하여 PR을 자동 머지한다.
+"""
+from __future__ import annotations
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+def should_auto_merge(
+    auto_merge: bool, require_e2e: bool, max_files_changed: int,
+    blocked_paths: list[str], changed_files: list[str],
+    tests_passed: bool, e2e_passed: bool,
+) -> bool:
+    if not auto_merge:
+        return False
+    if not tests_passed:
+        return False
+    if require_e2e and not e2e_passed:
+        return False
+    if len(changed_files) > max_files_changed:
+        return False
+    for f in changed_files:
+        for blocked in blocked_paths:
+            if f == blocked or f.endswith("/" + blocked):
+                return False
+    return True
+
+
+class AutoMergeChecker:
+    def __init__(
+        self, auto_merge: bool = False, require_e2e: bool = False,
+        max_files_changed: int = 10, blocked_paths: list[str] | None = None,
+    ):
+        self._auto_merge = auto_merge
+        self._require_e2e = require_e2e
+        self._max_files_changed = max_files_changed
+        self._blocked_paths = blocked_paths or []
+
+    async def try_merge(
+        self, owner: str, repo: str, pr_number: int,
+        changed_files: list[str], tests_passed: bool, e2e_passed: bool,
+    ) -> dict:
+        can_merge = should_auto_merge(
+            auto_merge=self._auto_merge, require_e2e=self._require_e2e,
+            max_files_changed=self._max_files_changed, blocked_paths=self._blocked_paths,
+            changed_files=changed_files, tests_passed=tests_passed, e2e_passed=e2e_passed,
+        )
+        if not can_merge:
+            return {"merged": False, "reason": "conditions not met"}
+        try:
+            from agent.utils.gitea_client import get_gitea_client
+            client = get_gitea_client()
+            await client.merge_pull_request(owner=owner, repo=repo, pr_number=pr_number)
+            logger.info("Auto-merged PR #%d on %s/%s", pr_number, owner, repo)
+            return {"merged": True, "reason": "all conditions met"}
+        except Exception as e:
+            logger.exception("Auto-merge failed for PR #%d", pr_number)
+            return {"merged": False, "reason": f"merge failed: {e}"}
diff --git a/tests/test_auto_merge.py b/tests/test_auto_merge.py
new file mode 100644
index 0000000..6459549
--- /dev/null
+++ b/tests/test_auto_merge.py
@@ -0,0 +1,70 @@
+import pytest
+from unittest.mock import AsyncMock, MagicMock, patch
+
+from agent.auto_merge import should_auto_merge, AutoMergeChecker
+
+
+def test_should_not_merge_when_disabled():
+    result = should_auto_merge(
+        auto_merge=False, require_e2e=False, max_files_changed=10,
+        blocked_paths=[".env"], changed_files=["backend/app/main.py"],
+        tests_passed=True, e2e_passed=True,
+    )
+    assert result is False
+
+
+def test_should_merge_when_all_conditions_met():
+    result = should_auto_merge(
+        auto_merge=True, require_e2e=True, max_files_changed=10,
+        blocked_paths=[".env", "quant.md"],
+        changed_files=["backend/app/main.py", "backend/tests/test_main.py"],
+        tests_passed=True, e2e_passed=True,
+    )
+    assert result is True
+
+
+def test_should_not_merge_when_tests_fail():
+    result = should_auto_merge(
+        auto_merge=True, require_e2e=False, max_files_changed=10,
+        blocked_paths=[], changed_files=["a.py"],
+        tests_passed=False, e2e_passed=False,
+    )
+    assert result is False
+
+
+def test_should_not_merge_when_e2e_required_but_failed():
+    result = should_auto_merge(
+        auto_merge=True, require_e2e=True, max_files_changed=10,
+        blocked_paths=[], changed_files=["a.py"],
+        tests_passed=True, e2e_passed=False,
+    )
+    assert result is False
+
+
+def test_should_not_merge_when_too_many_files():
+    files = [f"file{i}.py" for i in range(15)]
+    result = should_auto_merge(
+        auto_merge=True, require_e2e=False, max_files_changed=10,
+        blocked_paths=[], changed_files=files,
+        tests_passed=True, e2e_passed=True,
+    )
+    assert result is False
+
+
+def test_should_not_merge_when_blocked_path_modified():
+    result = should_auto_merge(
+        auto_merge=True, require_e2e=False, max_files_changed=10,
+        blocked_paths=[".env", "quant.md"],
+        changed_files=["backend/app/main.py", ".env"],
+        tests_passed=True, e2e_passed=True,
+    )
+    assert result is False
+
+
+def test_should_merge_without_e2e_when_not_required():
+    result = should_auto_merge(
+        auto_merge=True, require_e2e=False, max_files_changed=10,
+        blocked_paths=[], changed_files=["a.py"],
+        tests_passed=True, e2e_passed=False,
+    )
+    assert result is True