v2.5.8

March 6, 2026

Store structured agent state in MySQL without serialization errors

A json_serializer is now passed during MySQL engine creation, ensuring that JSON fields are correctly serialized when reading from and writing to MySQL-backed databases. This resolves silent data corruption and type errors that could occur when storing structured agent state or session data.

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Details:

json_serializer is applied automatically at engine creation time
Fixes incorrect handling of JSON columns in MySQL storage backends
No application-level changes required