Live mode is non-functional: run-live.ts imports a missing live-bridge module

[williamzujkowski]

Problem

src/run-live.ts dynamically imports ./live-bridge.js and requires it to export createMcpCaller():

const bridgePath = './live-bridge.js';
const mod = await import(bridgePath);
const factory = mod['createMcpCaller'];
if (typeof factory !== 'function') throw new Error('live-bridge.ts must export createMcpCaller()');

No src/live-bridge.ts (nor a compiled dist/live-bridge.js) exists in the repo. As a result both the documented NEXUS_LIVE=true npx tsx src/run-live.ts (README) and the pnpm live script (package.json) always fail with Failed to load live bridge: ....

Suggested fix

Pick one:

1. Commit a src/live-bridge.ts that exports createMcpCaller(): Promise<ToolCaller> wiring up a real nexus-agents MCP client (preferred), or
2. Commit a documented example/stub live-bridge.example.ts and update the README to instruct users to copy it to src/live-bridge.ts, clarifying that live mode requires a user-supplied bridge.

The existing try/catch handles the missing-module case gracefully, so this is a functionality/onboarding gap rather than a crash, but the feature does not work out of the box as documented.