amoghrajesh opened a new pull request, #64148:
URL: https://github.com/apache/airflow/pull/64148
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I wasn't anticipating that we would need this initially, but turns out we
lose abilities of `XcomEncoder` / `XcomDecoder` if we do not use them as it was
removed in: https://github.com/apache/airflow/pull/58900. The ability lost here
is disallowing the internal keys like `_classname`, `_types` etc.
However, we cannot go back to the old way of importing `XcomEncoder` again
because it internally imports `airflow.sdk.serde` and we do not want to bring
back the dependency of sdk in core that we worked hard to remove.
The ideal solution to this would be to move serialization format constants
(__classname__, __type, __var, etc.)
to a new shared library and consume those across airflow-core and task-sdk.
This also brings back the validation in XCom API to reject reserved
serialization keys in user-provided data and update read path to avoid
unnecessary deserialization.
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