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Use UserData generic for typed process-level userData #38

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Merged
u9g merged 2 commits into from
Apr 29, 2026
+9 −13
Merged

Use UserData generic for typed process-level userData #38

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bd09f14
Revert "Revert "Use UserData generic for typed process-level userData…
u9g Apr 14, 2026
76b6038
fix: format main.ts import to satisfy prettier
u9g Apr 28, 2026
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22 changes: 9 additions & 13 deletions src/main.ts
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Original file line number Diff line number Diff line change
@@ -1,12 +1,4 @@
import {
type JobContext,
type JobProcess,
ServerOptions,
cli,
defineAgent,
inference,
voice,
} from '@livekit/agents';
import { ServerOptions, cli, defineAgent, inference, voice } from '@livekit/agents';
import * as livekit from '@livekit/agents-plugin-livekit';
import * as silero from '@livekit/agents-plugin-silero';
import { BackgroundVoiceCancellation } from '@livekit/noise-cancellation-node';
Expand All @@ -19,11 +11,15 @@ import { Agent } from './agent';
// when running locally or self-hosting your agent server.
dotenv.config({ path: '.env.local' });

export default defineAgent({
prewarm: async (proc: JobProcess) => {
interface ProcessUserData {
vad: silero.VAD;
}

export default defineAgent<ProcessUserData>({
prewarm: async (proc) => {
proc.userData.vad = await silero.VAD.load();
},
entry: async (ctx: JobContext) => {
entry: async (ctx) => {
// Set up a voice AI pipeline using OpenAI, Cartesia, Deepgram, and the LiveKit turn detector
const session = new voice.AgentSession({
// Speech-to-text (STT) is your agent's ears, turning the user's speech into text that the LLM can understand
Expand All @@ -49,7 +45,7 @@ export default defineAgent({
// VAD and turn detection are used to determine when the user is speaking and when the agent should respond
// See more at https://docs.livekit.io/agents/build/turns
turnDetection: new livekit.turnDetector.MultilingualModel(),
vad: ctx.proc.userData.vad! as silero.VAD,
vad: ctx.proc.userData.vad,
voiceOptions: {
// Allow the LLM to generate a response while waiting for the end of turn
preemptiveGeneration: true,
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