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/Pair.js

@@ -0,0 +1,39 @@
+'use strict';
+
+var createNode = require('../doc/createNode.js');
+var stringifyPair = require('../stringify/stringifyPair.js');
+var addPairToJSMap = require('./addPairToJSMap.js');
+var identity = require('./identity.js');
+
+function createPair(key, value, ctx) {
+    const k = createNode.createNode(key, undefined, ctx);
+    const v = createNode.createNode(value, undefined, ctx);
+    return new Pair(k, v);
+}
+class Pair {
+    constructor(key, value = null) {
+        Object.defineProperty(this, identity.NODE_TYPE, { value: identity.PAIR });
+        this.key = key;
+        this.value = value;
+    }
+    clone(schema) {
+        let { key, value } = this;
+        if (identity.isNode(key))
+            key = key.clone(schema);
+        if (identity.isNode(value))
+            value = value.clone(schema);
+        return new Pair(key, value);
+    }
+    toJSON(_, ctx) {
+        const pair = ctx?.mapAsMap ? new Map() : {};
+        return addPairToJSMap.addPairToJSMap(ctx, pair, this);
+    }
+    toString(ctx, onComment, onChompKeep) {
+        return ctx?.doc
+            ? stringifyPair.stringifyPair(this, ctx, onComment, onChompKeep)
+            : JSON.stringify(this);
+    }
+}
+
+exports.Pair = Pair;
+exports.createPair = createPair;