v2.37.0 voice-agent scaffold

A complete program, not a fragment: it compiles as written. Copy it, rename the placeholder identifiers to your domain, and run axon check — the compiler will tell you what your renaming broke. An MCP client can also generate it through the axon.compose tool by naming the voice_preset domain.

// AXON v2.37.0 voice-agent scaffold — the vendor is a DECLARATION,
// not a dependency (voice_integration_is_a_declaration_not_a_rewrite).
//
// This is the whole program: a barge-in-capable phone agent over blessed
// vendor presets. It expands (run `axon desugar` on this file to see it)
// to the ordinary primitives: the mu-law<->PCM16 `ots` codec pair, a v2.36.0
// interruptible carrier `session` + `socket` (residual parking governed
// by the declared legal_basis), and one `upstream` per vendor leg.
//
// Swap vendors by editing ONE token (e.g. `stt: AssemblyAISTT@v1`), or
// switch to a fused speech-to-speech architecture with a single
// `realtime: OpenAIRealtime@v1` leg instead of the stt/tts pair. The
// vendor URL + credential are per-tenant config (`upstream.deepgram.url`
// / `upstream.deepgram.api_key`), never source.

voice Concierge {
    stt: DeepgramSTT@v1
    tts: ElevenLabsTTS@v1
    interruptible: true
    legal_basis: legitimate_interest
}