docs: fix 140ms→160ms (2 Mimi frames at 12.5 Hz)

README.md

@@ -70,7 +70,7 @@ The bifurcation is even cleaner than the 95% TPR suggests:
 - **tool_match rows** → `cb0 = [430, 127, ...]` (model emits blip's semantic codebook)
 - **non_tool / tool_miss rows** → `cb0 = [1049, 127, ...]` (entirely different opening)
 
-Bit-exact discrimination on the first 2 audio frames' cb0 codeword. A coordinator that watches cb0 sees tool intent ~140 ms after the model starts speaking.
+Bit-exact discrimination on the first 2 audio frames' cb0 codeword. Mimi's frame rate is 12.5 Hz so 2 frames = **160 ms** of audio — a coordinator that watches cb0 confirms tool intent that fast, then dispatches the tool while the ack is still being spoken.
 
 ## Coordinator integration recipe