chore: update README and env vars to clarify agent name and agent dispatch responsibilities

[thomasyuill-livekit]

PR Summary

Problem

README and comments state agentName is for LiveKit Cloud Sandbox, which is misleading because it's also necessary if you're testing with an agent that requires explicit dispatch. Agent's exported form Agent Builder default to explicit dispatch

Testing an agent using explicit dispatch requires you modify agentName in app-config.ts file which causes a git diff. This git diff could be accidentally checked in.

Solution

Update README and comments to indicate agentName is part of agent dispatch configuration.

By implementing AGENT_NAME in .env.local this value will not impact git diff's or cause it to be accidentally checked in.

Key changes:

• .env.example: Added AGENT_NAME environment variable with documentation explaining automatic vs explicit dispatch modes
• README.md: Updated documentation to reflect the new configuration structure and environment variable
• app-config.ts:
  • Read agentName from local env vars, default to undefined
  • update comments to clearly indicate config value purposes

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Project	Deployment	Review	Updated (UTC)
sandbox-voice-assistant	Ready	Preview	Dec 28, 2025 4:57pm