reconstruct and build @anthropic-ai/claude-code source from source map

- Extract 4756 source files from cli.js.map (57MB)
- Set up Bun build system with bun:bundle feature flag shim
- Configure 90+ compile-time feature flags matching production defaults
- Inject MACRO constants (VERSION, BUILD_TIME, etc.)
- Create stubs for private packages (color-diff-napi, modifiers-napi, etc.)
- Install all public dependencies via pnpm
- Patch commander v14 to allow multi-char short flags (-d2e)
- Build output: dist/cli.js (22MB), verified working

claude-code-source/node_modules/default-browser-id/index.js

@@ -0,0 +1,18 @@
+import {promisify} from 'node:util';
+import process from 'node:process';
+import {execFile} from 'node:child_process';
+
+const execFileAsync = promisify(execFile);
+
+export default async function defaultBrowserId() {
+	if (process.platform !== 'darwin') {
+		throw new Error('macOS only');
+	}
+
+	const {stdout} = await execFileAsync('defaults', ['read', 'com.apple.LaunchServices/com.apple.launchservices.secure', 'LSHandlers']);
+
+	// `(?!-)` is to prevent matching `LSHandlerRoleAll = "-";`.
+	const match = /LSHandlerRoleAll = "(?!-)(?<id>[^"]+?)";\s+?LSHandlerURLScheme = (?:http|https);/.exec(stdout);
+
+	return match?.groups.id ?? 'com.apple.Safari';
+}