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  "title": "Refactor broadcast_to to use shape dicts",
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  "debrief": "OpenAI Codex refactors broadcast_to in the haliax repository to use shape dictionaries instead of tuples, and checks axis size mismatches to expose clearer errors. The change touches one file, with 41 additions and 17 deletions, in one commit. It merges clean with no changes requested, 0.17 hours after opening.",
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  "body_excerpt": "## Summary\n- implement `broadcast_to` using shape dictionaries instead of tuples\n- check axis size mismatches and expose clearer errors\n\n## Testing\n- `uv run pre-commit run --all-files`\n- `XLA_FLAGS=--xla_force_host_platform_device_count=8 PYTHONPATH=tests:src:. uv run pytest tests/test_ops.py::test",
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