extension/llm/runner: Python bindings for the Engine/Session API#19992
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mergennachin wants to merge 3 commits into
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extension/llm/runner: Python bindings for the Engine/Session API#19992mergennachin wants to merge 3 commits into
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/19992
Note: Links to docs will display an error until the docs builds have been completed. ❌ 4 New FailuresAs of commit b3225d7 with merge base eeb0646 ( NEW FAILURES - The following jobs have failed:
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absorbed into #19991 / dropped in the worker-process re-architecture |
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Bind LLMEngine and LLMSession (PyLLMEngine/PyLLMSession), exposing
create_session(), serving_capacity(), and the token-step methods
(prefill_tokens/decode_one/seek/position/reset/stop) only on LLMSession.
PyTextLLMRunner stays a legacy direct runner and no longer exposes token-step
methods, so LLMSession is the single Python serving surface. Backend execution
across an engine's sessions is serialized by an engine-owned lock.
TokenStringCallback buffers byte-level BPE tokens so a multi-byte character
split across callbacks does not break UTF-8 decoding. Stubs in _llm_runner.pyi;
boundary and session tests in test_runner_pybindings.py.
Second of four stacked commits; depends on the C++ core.
#20001