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/is-docker/index.js

@@ -0,0 +1,29 @@
+import fs from 'node:fs';
+
+let isDockerCached;
+
+function hasDockerEnv() {
+	try {
+		fs.statSync('/.dockerenv');
+		return true;
+	} catch {
+		return false;
+	}
+}
+
+function hasDockerCGroup() {
+	try {
+		return fs.readFileSync('/proc/self/cgroup', 'utf8').includes('docker');
+	} catch {
+		return false;
+	}
+}
+
+export default function isDocker() {
+	// TODO: Use `??=` when targeting Node.js 16.
+	if (isDockerCached === undefined) {
+		isDockerCached = hasDockerEnv() || hasDockerCGroup();
+	}
+
+	return isDockerCached;
+}