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fix(observability): bind Bun server to 127.0.0.1 to prevent LAN exposure #1386

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fix(observability): bind Bun server to 127.0.0.1 to prevent LAN exposure #1386

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5 changes: 5 additions & 0 deletions Releases/v2.3/.claude/Observability/apps/server/src/index.ts
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Expand Up @@ -48,6 +48,11 @@ startTaskWatcher((task: BackgroundTask) => {
// Create Bun server with HTTP and WebSocket support
const server = Bun.serve({
port: 4000,
// Bind to loopback only. This server exposes /api/activities
// (kitty tab titles) and /api/haiku/summarize (proxied Anthropic API
// key) with `Access-Control-Allow-Origin: *` and no authentication —
// it must never be reachable from the network.
hostname: '127.0.0.1',

async fetch(req: Request) {
const url = new URL(req.url);
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