fix: make concurrent tool batching path-aware for file mutations#1914
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fix: make concurrent tool batching path-aware for file mutations#1914
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- Log malformed/non-dict tool arguments at debug level before falling back to sequential, instead of silently swallowing the error into an empty dict - Guard empty paths in _paths_overlap (unreachable in practice due to upstream filtering, but makes the invariant explicit) - Add tests: malformed JSON args, non-dict args, _paths_overlap unit tests including empty path edge cases - web_crawl is not a registered tool (only web_search/web_extract are); no addition needed to _PARALLEL_SAFE_TOOLS
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Salvage of PR #1873 by @kshitijk4poor (cherry-picked with authorship preserved, 2 commits). Fixes #1872.
Summary
The tool batching gate was too coarse — any multi-call batch without
clarifywent concurrent, which meant overlapping file mutations likewrite_file("src/a.py")+patch("src/a.py")could race each other with nondeterministic results.This makes the parallelization decision path-aware:
web_search,read_file,search_files, etc.) → always safe to parallelizeread_file,write_file,patch) → parallel only when targeting different pathsterminal, etc.) → forced sequentialDisjoint file operations keep their latency benefit while overlapping mutations stay ordered.
Changes
run_agent.py: New_should_parallelize_tool_batch()function with_PARALLEL_SAFE_TOOLS,_PATH_SCOPED_TOOLSallowlists, path overlap detectiontests/test_run_agent.py: 8 new test methods covering overlapping/disjoint writes, terminal batches, malformed args, plus unit tests for_paths_overlapTest plan
pytest tests/test_run_agent.py -n0 -q— 190 passed