Semantic Kernel lacks Python 3.14 support as Microsoft quietly shifts to Agent Framework
Normal-Cash9579 · reddit · 2026-09-18
- The poster explains that the core semantic-kernel package is a pure-Python wheel with no upper bound on requires-python, so it resolves on Python 3.14 — but optional extras ([onnx], [huggingface], [usearch]) pull in compiled dependencies capped below new Python versions since early 2025, causing resolver failures or C++/Rust build errors.
- There is no open issue tracking 3.14, no CI lane, and no timeline, while agent-framework already ships 3.14 in its classifiers.
- His read: Semantic Kernel entered maintenance mode after Microsoft Agent Framework hit GA in April 2026. Teams that built on SK in 2024/2025 must either freeze on Python 3.12 or rewrite against MAF; a one-line README note would have saved many an afternoon.
- He asks production users whether SK core actually runs fine on 3.14, how they handled the extras problem, how painful SK → Agent Framework migration really is, and whether anyone is deliberately staying on SK.
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