Files
platform/src/servers/api/anthropic-proxy.ts
T
pastilhasandClaude Opus 4.6 86c2d6333a process sidecar: independent process manager for long-running work
Introduces a separate Bun process (port 5100) that owns all spawned
processes and long-running work, so the API server can restart freely
without disrupting active sessions.

The sidecar owns:
- Anthropic proxy (port 5051) with persisted secret across restarts
- Claude Code process spawning and session tracking (--resume support)
- Pi agent spawning and RPC lifecycle (prompt/abort/thinking)
- Job queue engine (lane processing, retries, notifications)

The API server becomes a thin client that forwards commands over a
single WebSocket connection with auto-reconnect. send-claude-code.ts
goes from 550 lines of spawn logic to 73 lines of sidecar delegation.

State persisted to data/sidecar/state.json every 30s and on shutdown.
Lockfile prevents duplicate instances. See SIDECAR.md for full docs
and manual testing procedures.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-05 07:36:47 +00:00

93 lines
2.9 KiB
TypeScript

import { join } from 'node:path';
import { homedir } from 'node:os';
const PROXY_PORT = Number(process.env.ANTHROPIC_PROXY_PORT ?? '5051');
const ANTHROPIC_API_BASE = 'https://api.anthropic.com';
const CREDENTIALS_PATH = join(homedir(), '.claude', '.credentials.json');
// Generate a random proxy secret at startup — shared with Claude Code spawns
// Prefix must match a real Anthropic API key format (sk-ant-api03-*) so Claude Code accepts it
export const proxySecret = `sk-ant-api03-${crypto.randomUUID()}`;
type CredentialsFile = {
claudeAiOauth?: {
accessToken?: string;
};
};
async function readOAuthToken(): Promise<string | null> {
try {
const file = Bun.file(CREDENTIALS_PATH);
if (!(await file.exists())) return null;
const data = (await file.json()) as CredentialsFile;
return data.claudeAiOauth?.accessToken?.trim() || null;
} catch {
return null;
}
}
export function startAnthropicProxy() {
Bun.serve({
port: PROXY_PORT,
hostname: '127.0.0.1',
idleTimeout: 0,
async fetch(req) {
const url = new URL(req.url);
// Validate proxy secret
const incomingKey = req.headers.get('x-api-key');
if (incomingKey !== proxySecret) {
return new Response(JSON.stringify({ error: 'Unauthorized' }), {
status: 401,
headers: { 'Content-Type': 'application/json' },
});
}
// Read fresh OAuth token
const token = await readOAuthToken();
if (!token) {
return new Response(JSON.stringify({ error: 'No OAuth token available' }), {
status: 502,
headers: { 'Content-Type': 'application/json' },
});
}
// Build upstream URL
const upstream = `${ANTHROPIC_API_BASE}${url.pathname}${url.search}`;
// Clone headers, replace proxy secret with real OAuth token
const headers = new Headers(req.headers);
headers.set('x-api-key', token);
headers.delete('host');
// Read request body fully before forwarding — avoids stream-in-stream issues
const body = req.body ? await req.arrayBuffer() : null;
// Forward request
const upstreamRes = await fetch(upstream, {
method: req.method,
headers,
body,
});
// Build clean response headers
const resHeaders = new Headers();
for (const [key, value] of upstreamRes.headers) {
const lower = key.toLowerCase();
// Skip hop-by-hop and encoding headers that may have been consumed by fetch
if (lower === 'content-encoding' || lower === 'content-length' || lower === 'transfer-encoding') continue;
resHeaders.set(key, value);
}
return new Response(upstreamRes.body, {
status: upstreamRes.status,
statusText: upstreamRes.statusText,
headers: resHeaders,
});
},
});
console.log(`[anthropic-proxy] listening on 127.0.0.1:${PROXY_PORT}`);
}