Bun bundled application fails to run in browser (reading `loadEnv`)

[chrisui]

Describe the bug

When using bun to bundle a browser-client app, if the @openai/realtime-agents package is imported it will simply break at runtime.

frontend TypeError: Cannot read properties of null (reading 'loadEnv')
      at loadEnv3 (/Users/chris/Projects/bun-openai-bug/node_modules/@openai/agents-core/dist/config.mjs:8:12)
      at isEnabled (/Users/chris/Projects/bun-openai-bug/node_modules/@openai/agents-core/dist/config.mjs:17:17)
      at get dontLogModelData (/Users/chris/Projects/bun-openai-bug/node_modules/@openai/agents-core/dist/config.mjs:41:16)
      at /Users/chris/Projects/bun-openai-bug/node_modules/@openai/agents-core/dist/logger.mjs:7:34
    from browser tab http://localhost:3000/

Debug information

• Agents SDK version: "@openai/agents-realtime": "^0.1.3"
• Runtime environment: Bun v1.2.22 (Chrome browser)

Repro steps

Repro: https://github.com/chrisui/bun-openai-bug

git clone git@github.com:chrisui/bun-openai-bug.git
bun install
bun index.html

goto localhost:3000 and you'll see the error

Expected behavior

No runtime error.

Compare to it working with bunx vite dev index.html

[seratch]

Hi, thanks for reporting this. I've confirmed the error occurs. It seems this is specific to module loading in Bun's HMR, but I am not sure what's the right way to resolve the issue for the runtime. If anyone has knowledge on this, sharing insights would be greatly appreciated.