Introduce CodeClash Ladder#94
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Reviewed against current upstream/main.
Verification:
- uv run pytest -q tests/arenas/test_robotrumble.py
- uv run ruff check codeclash/agents/player.py codeclash/arenas/robotrumble/robotrumble.py scripts/run_ladder.py
- parsed ladder configs through resolve_includes
- uv run python scripts/run_ladder.py --help
- uv run pytest -q
Full suite passed: 173 passed. I did not find a blocking issue. Non-blocking follow-up: configs/ablations/ladder/README.md still describes the old all-pairs runner flow, while this PR turns scripts/run_ladder.py into a ladder-climb runner.
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This PR introduces the assets for creating and running models against CodeClash ladders.
To learn more about "CC:Ladder", check out the blog post (forthcoming): https://codeclash.ai/insights/20260115_human_ai_ladder/
Specifically, we introduce:
run_ladder.pyscript for running model against ladderplayer.pyfile to make branch checkouts smootherrobotrumble.pyto make validation more general