feat(mettagrid): add C++ filter and mutation implementations for events

[daveey]

Add C++ implementations for event system filters and mutations:

Filters (handler_config.hpp + filter.hpp):

• ObjectTypeFilterConfig + ObjectTypeFilter: Check if object has a specific tag
• CollectiveFilterConfig + CollectiveFilter: Check if object belongs to collective
• BoundaryFilterConfig + BoundaryFilter: Check if at boundary between collectives
  (Note: adjacency check is a TODO pending grid neighbor iteration)

Mutations (handler_config.hpp + mutation.hpp):

• AlignToCollectiveMutationConfig + AlignToCollectiveMutation: Align to named collective
• StatsMutationConfig + StatsMutation: Log stat with delta

Co-Authored-By: Claude Opus 4.5 noreply@anthropic.com

[daveey]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• feat(mettagrid): add C++ filter and mutation implementations for events #4961 👈 (View in Graphite)
• test(mettagrid): add integration tests for events system #4960 : 1 other dependent PR (#4985 )
• feat(mettagrid): add StatsMutation for logging stats #4958 : 1 other dependent PR (#4959 )
• feat(mettagrid): add AlignToCollectiveMutation for direct collective alignment #4957
• feat(mettagrid): add CollectiveFilter for filtering by collective membership #4956
• feat(mettagrid): add ObjectTypeFilter for filtering by object type #4955
• feat(mettagrid): add events system core infrastructure #4954
• refactor(mettagrid): remove clipper system #4953
• main

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[blacksmith-sh]

Found 6 test failures on Blacksmith runners:

Failures

Test	View Logs
EditionsCodegenTests/third_party/protobuf/editions/golden/simple_proto3.pb.cc	View Logs
EditionsCodegenTests/third_party/protobuf/editions/golden/simple_proto3.pb.cc	View Logs
EditionsCodegenTests/third_party/protobuf/editions/golden/simple_proto3.pb.cc	View Logs
EditionsCodegenTests/third_party/protobuf/editions/golden/simple_proto3.pb.h	View Logs
EditionsCodegenTests/third_party/protobuf/editions/golden/simple_proto3.pb.h	View Logs
EditionsCodegenTests/third_party/protobuf/editions/golden/simple_proto3.pb.h	View Logs

[datadog-official]

⚠️ Tests

✨ Fix all issues with Cursor

⚠️ Warnings

🧪 253 Tests failed

    TestActionOrdering::test_action_indices_consistency from test_action_compatibility.py (Fix with Cursor)

    TestActionOrdering::test_action_order_is_fixed from test_action_compatibility.py (Fix with Cursor)

    TestActionSpace::test_action_space_shape from test_action_compatibility.py (Fix with Cursor)

View all

ℹ️ Info

❄️ No new flaky tests detected

_{This comment will be updated automatically if new data arrives.
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[openhands-ai]

Looks like there are a few issues preventing this PR from being merged!

• GitHub Actions are failing:
  • Test and Benchmark

If you'd like me to help, just leave a comment, like

@OpenHands please fix the failing actions on PR #4961 at branch `01-16-feat_mettagrid_add_c_filter_and_mutation_implementations_for_events`

Feel free to include any additional details that might help me get this PR into a better state.

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