setup.ts

#!/usr/bin/env bun
/**
 * setup.ts — One-command install for the sbfbl-router proxy.
 *
 * Usage:
 *   bun run ~/Documents/coding_project/sbfbl-router/setup.ts
 *
 * What it does (idempotent, safe to re-run):
 *   1. Detects the SBFBL project directory
 *   2. Merges ANTHROPIC_BASE_URL into .claude/settings.local.json (preserves API keys)
 *   3. Merges the SessionStart hook into .claude/settings.json (preserves model/permissions)
 *   4. Starts the proxy (macOS launchd daemon or background bun process)
 *   5. Verifies health — exits 0 on success, non-zero on failure
 *
 * No sudo, no bashrc edits, no global state changes outside these files.
 * The API token stays in .claude/settings.local.json (gitignored).
 * The proxy reads config.json (next to proxy.ts) or env vars.
 */

import { readFileSync, writeFileSync, existsSync, mkdirSync } from "node:fs";
import { execSync } from "node:child_process";

// ── Configuration ──────────────────────────────────────────────────────────

const PROXY_DIR = import.meta.dirname;
const SBFBL_DIR = "/Users/bubblyducks/SBFBL"; // Update to your SBFBL project dir
const PORT = 3456;

const PLIST_DIR = "/Users/bubblyducks/Library/LaunchAgents";
const PLIST_LABEL = "com.bubblyducks.sbfbl-router";
const BUN_BIN = "/Users/bubblyducks/.bun/bin/bun";
const LOG_DIR = "/Users/bubblyducks/.cache/sbfbl-router";

// ── Helpers ────────────────────────────────────────────────────────────────

function loadJson(path: string): Record<string, unknown> {
  if (!existsSync(path)) return {};
  return JSON.parse(readFileSync(path, "utf-8"));
}

function saveJson(path: string, data: unknown) {
  mkdirSync(new URL(path).pathname.split("/").slice(0, -1).join("/"), {
    recursive: true,
  });
  writeFileSync(path, JSON.stringify(data, null, 2) + "\n");
}

function exec(cmd: string): string {
  try {
    return execSync(cmd, { stdio: "pipe" }).toString().trim();
  } catch {
    return "";
  }

}

// ── Step 1: Detect SBFBL ───────────────────────────────────────────────────

if (!existsSync(`${SBFBL_DIR}/.claude/`)) {
  console.error(
    `SBFBL project not found at ${SBFBL_DIR}.`,
  );
  process.exit(1);
}
console.log(`✓ SBFBL project: ${SBFBL_DIR}`);

// ── Step 2: Merge settings.local.json ──────────────────────────────────────

const localSettingsPath = `${SBFBL_DIR}/.claude/settings.local.json`;
const localCfg = loadJson(localSettingsPath);
const env = (localCfg.env as Record<string, string>) || {};

// Preserve existing ANTHROPIC_AUTH_TOKEN
if (!env.ANTHROPIC_AUTH_TOKEN && process.env.ANTHROPIC_AUTH_TOKEN) {
  env.ANTHROPIC_AUTH_TOKEN = process.env.ANTHROPIC_AUTH_TOKEN;
  console.log(
    `✓ ANTHROPIC_AUTH_TOKEN set in settings.local.json (from env)`,
  );
}

env.A