# Stage: transcribe

## Purpose
Generate raw per-speaker transcripts from prepared audio using WhisperX.

## Inputs
- `audio/*.flac` from `prepare`

## Outputs
- `transcripts/raw/<speaker>.json`

## Key Behavior
- discovers prepared audio from manifest inputs or canonical audio directory.
- derives speaker ID from `.flac` basename.
- runs WhisperX with configured concurrency/retry settings.
- validates each output as JSON.
- writes run-local outputs then materializes canonical transcript outputs.

## Invariants
- speaker basenames must be unique.
- output path returned by adapter must match requested output path.
- each successful output is validated before stage success.