feat(mettagrid): add StatsMutation for logging stats #4958
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| } | ||
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| // Log the stat to the collective's stats tracker | ||
| coll->stats.add(_config.stat_name, _config.delta); |
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We need to specify if it's game, agent, or collective stat. And handle those
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Add StatsMutation that logs a stat with a specified delta. Useful for events to track when they fire or record custom metrics. Python: - StatsMutationConfig with mutation_type="stats", stat field and delta field - LogStat() helper function with optional delta (default 1) - Added to AnyMutation union C++: - StatsMutationConfig struct in handler_config.hpp - StatsMutation class in mutation.hpp (logs to target's collective StatsTracker) - Added to MutationConfig variant Tests: - test_stats_mutation.py with creation, helper, default delta, serialization tests Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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This was referenced Jan 19, 2026
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Add StatsMutation that logs a stat with a specified delta.
Useful for events to track when they fire or record custom metrics.
Co-Authored-By: Claude Opus 4.5 noreply@anthropic.com