Reject files over 1 MB during PR review (#882)

actions/__init__.py

@@ -28,4 +28,4 @@
 #     ├── test_summarize_pr.py
 #     └── ...
 
-__version__ = "0.3.12"
+__version__ = "0.3.13"

actions/review_pr.py

@@ -594,6 +594,7 @@ def generate_pr_review(
         "- Security vulnerabilities, data loss, corruption, or irreversible behavior\n"
         "- Bugs, broken contracts, race conditions, and compatibility regressions with a concrete failure path\n"
         "- Performance regressions with a plausible workload and measurable impact\n"
+        "- Never approve any added file larger than 1 MB, regardless of type\n"
         "- Maintainability only when the change creates demonstrated duplication, conflicting owners, or unreachable behavior\n\n"
         "WHEN NOT TO COMMENT:\n"
         "- Style/formatting (handled by ruff/prettier)\n"

tests/test_first_interaction.py

@@ -183,6 +183,7 @@ def test_generate_pr_review_uses_synchronous_response(mock_get_agent_response, m
         "Do not flag package or version availability based on web search"
         in mock_get_agent_response.call_args.args[0][0]["content"]
     )
+    assert "Never approve any added file larger than 1 MB" in mock_get_agent_response.call_args.args[0][0]["content"]
 
 
 def test_review_agent_search_scans_local_checkout_only(tmp_path, monkeypatch):