fix: fix serialization of State and PipelineSnapshot - #12113
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julian-risch
approved these changes
Jul 22, 2026
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Related Issues
Proposed Changes:
Fixed the schema-aware serialization helper used for pipeline snapshots and
AgentState(_serialize_value_with_schema) so it no longer silently passes unsupported objects through as if they were serialized. Values such asdatetime,bytes,complexand arbitrary objects without ato_dictmethod were previously stored unchanged and mislabeled as strings, which broke JSON storage and round-tripping of snapshots. Unsupported values now raise aSerializationError, and the callers that build snapshots (pipeline breakpoints andState.to_dict) catch it to omit only the offending field while keeping the rest of the payload resumable.Added support for serializing and deserializing
frozensetvalues in_serialize_value_with_schema. Afrozensetnow round-trips back to afrozensetinstead of being dropped.How did you test it?
Updated existing tests and added new ones.
Notes for the reviewer
cc @marc-mrt
Checklist
fix:,feat:,build:,chore:,ci:,docs:,style:,refactor:,perf:,test:and added!in case the PR includes breaking changes.