# Vosk Keystroke Grammar Findings

- Date (UTC): 2026-02-28
- Run ID: `run-20260228T200047Z`
- Dataset size:
  - Literal grammar: 90 samples
  - NATO grammar: 90 samples
- Intents: 9 (`ctrl|shift|ctrl+shift` x `d|b|p`)

## Results

| Model | Literal intent accuracy | NATO intent accuracy | Literal p50 | NATO p50 |
|---|---:|---:|---:|---:|
| `vosk-small-en-us-0.15` | 71.11% | 100.00% | 26.07 ms | 26.38 ms |
| `vosk-en-us-0.22-lgraph` | 74.44% | 100.00% | 210.34 ms | 214.97 ms |

## Main Error Pattern (Literal Grammar)

- Letter confusion is concentrated on `p -> b`:
  - `control p -> control b`
  - `shift p -> shift b`
  - `control shift p -> control shift b`

## Takeaways

- NATO grammar is strongly validated for this keystroke use case (100% on both tested models).
- `vosk-small-en-us-0.15` is the practical default for command-keystroke experiments because it matches NATO accuracy while being much faster.

## Raw Report

- `exploration/vosk/keystrokes/eval_runs/run-20260228T200047Z/summary.json`