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/.ignored/@commander-js/extra-typings/esm.mjs

@@ -0,0 +1,16 @@
+import extraTypingsCommander from './index.js';
+
+// wrapper to provide named exports for ESM.
+export const {
+  program,
+  createCommand,
+  createArgument,
+  createOption,
+  CommanderError,
+  InvalidArgumentError,
+  InvalidOptionArgumentError, // deprecated old name
+  Command,
+  Argument,
+  Option,
+  Help,
+} = extraTypingsCommander;

claude-code-source/node_modules/.ignored/@commander-js/extra-typings/index.js

@@ -0,0 +1,28 @@
+const commander = require('commander');
+
+exports = module.exports = {};
+
+// Return a different global program than commander,
+// and don't also return it as default export.
+exports.program = new commander.Command();
+
+/**
+ * Expose classes. The FooT versions are just types, so return Commander original implementations!
+ */
+
+exports.Argument = commander.Argument;
+exports.Command = commander.Command;
+exports.CommanderError = commander.CommanderError;
+exports.Help = commander.Help;
+exports.InvalidArgumentError = commander.InvalidArgumentError;
+exports.InvalidOptionArgumentError = commander.InvalidArgumentError; // Deprecated
+exports.Option = commander.Option;
+
+// In Commander, the create routines end up being aliases for the matching
+// methods on the global program due to the (deprecated) legacy default export.
+// Here we roll our own, the way Commander might in future.
+exports.createCommand = (name) => new commander.Command(name);
+exports.createOption = (flags, description) =>
+  new commander.Option(flags, description);
+exports.createArgument = (name, description) =>
+  new commander.Argument(name, description);