Allow custom metadata in avro files
Allow custom metadata in avro files: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). The Avro spec says the file header meta map can hold arbitrary user-defined keys alongside avro.schema / avro.codec, but fastavro doesn't seem to expose this either way: On write: writer(fo…
The task
The Avro spec says the file header meta map can hold arbitrary user-defined keys alongside avro.schema / avro.codec, but fastavro doesn't seem to expose this either way: On write: writer(fo, schema, records, codec=...) doesn't take any way to add my own entries. I'd like to…
Part of XiaomiMiMo/MiMo-V2.6-RL-oss.