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/yaml/dist/nodes/identity.js

@@ -0,0 +1,53 @@
+'use strict';
+
+const ALIAS = Symbol.for('yaml.alias');
+const DOC = Symbol.for('yaml.document');
+const MAP = Symbol.for('yaml.map');
+const PAIR = Symbol.for('yaml.pair');
+const SCALAR = Symbol.for('yaml.scalar');
+const SEQ = Symbol.for('yaml.seq');
+const NODE_TYPE = Symbol.for('yaml.node.type');
+const isAlias = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === ALIAS;
+const isDocument = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === DOC;
+const isMap = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === MAP;
+const isPair = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === PAIR;
+const isScalar = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === SCALAR;
+const isSeq = (node) => !!node && typeof node === 'object' && node[NODE_TYPE] === SEQ;
+function isCollection(node) {
+    if (node && typeof node === 'object')
+        switch (node[NODE_TYPE]) {
+            case MAP:
+            case SEQ:
+                return true;
+        }
+    return false;
+}
+function isNode(node) {
+    if (node && typeof node === 'object')
+        switch (node[NODE_TYPE]) {
+            case ALIAS:
+            case MAP:
+            case SCALAR:
+            case SEQ:
+                return true;
+        }
+    return false;
+}
+const hasAnchor = (node) => (isScalar(node) || isCollection(node)) && !!node.anchor;
+
+exports.ALIAS = ALIAS;
+exports.DOC = DOC;
+exports.MAP = MAP;
+exports.NODE_TYPE = NODE_TYPE;
+exports.PAIR = PAIR;
+exports.SCALAR = SCALAR;
+exports.SEQ = SEQ;
+exports.hasAnchor = hasAnchor;
+exports.isAlias = isAlias;
+exports.isCollection = isCollection;
+exports.isDocument = isDocument;
+exports.isMap = isMap;
+exports.isNode = isNode;
+exports.isPair = isPair;
+exports.isScalar = isScalar;
+exports.isSeq = isSeq;