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feat(voice): open-vocabulary wake phrases via sherpa-onnx KWS

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New "sherpa" wake_word provider: the configured phrase is BPE-tokenized
at runtime against a small streaming zipformer KWS model (~13 MB English,
one-time download cached under HERMES_HOME), so ANY typed phrase works
with zero training — including per-profile phrases like "hey coder".

wake.sherpa lazy-dep group + [wake] extra grow sherpa-onnx/sentencepiece;
requirements probe routes per provider; sensitivity maps onto sherpa
keywords_threshold. E2E-verified on real audio (target phrase fires,
foreign phrase stays silent, reset drops buffered state).
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Hermes Agent 2026-07-24 08:39:19 -07:00 • committed by Teknium
parent dcc26fa28a
commit 0ae305ed4e
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7 changed files with 371 additions and 13 deletions
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9
hermes_cli/config.py
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@ -2380,8 +2380,8 @@ DEFAULT_CONFIG = {
"wake_word": {
"enabled": False,
"surface": "auto", # eligible surface: "auto" (first claimant) | "cli" | "tui" | "gui"
"provider": "openwakeword", # "openwakeword" (free, local) | "porcupine" (premium; needs PORCUPINE_ACCESS_KEY)
"phrase": "hey hermes", # cosmetic label only; detection is keyed by the engine model/keyword below
"provider": "openwakeword", # "openwakeword" (free, local) | "sherpa" (free, ANY phrase, no training) | "porcupine" (premium; needs PORCUPINE_ACCESS_KEY)
"phrase": "hey hermes", # for "sherpa" this IS the detected phrase (any text works); for other engines it's a cosmetic label — detection is keyed by the model/keyword below
"sensitivity": 0.5, # 0.0-1.0 detection threshold (higher = stricter)
"start_new_session": True, # start a fresh session on wake vs. continue the current one
"openwakeword": {
@ -2392,6 +2392,11 @@ DEFAULT_CONFIG = {
"model": "hey_hermes",
"inference_framework": "onnx", # "onnx" | "tflite"
},
"sherpa": {
# Optional path to a sherpa-onnx KWS model directory. Empty =
# auto-download the small English zipformer model on first use.
"model_dir": "",
},
"porcupine": {
# Built-in keyword ("jarvis", "computer", "bumblebee", ...) or a path
# to a custom .ppn from the Picovoice Console.