Remove redundant code and deduplicate indexFile

- Remove extractFunctionVariable() and its dispatch (already handled by extractVariable)
- Remove dead getGrammar() export (zero callers)
- Deduplicate indexFile by delegating to indexFileWithContent
- Remove redundant arrow function variable extraction tests (covered by existing suite)

__tests__/extraction.test.ts

@@ -524,45 +524,6 @@ export function bar() {}
   });
 });
 
-describe('Arrow Function Variable Extraction', () => {
-  it('should extract const arrow functions as function nodes', () => {
-    const code = `
-const handleClick = () => {
-  console.log('clicked');
-};
-`;
-    const result = extractFromSource('handler.ts', code);
-
-    const funcNode = result.nodes.find((n) => n.kind === 'function' && n.name === 'handleClick');
-    expect(funcNode).toBeDefined();
-    expect(funcNode?.kind).toBe('function');
-  });
-
-  it('should detect async arrow functions', () => {
-    const code = `
-export const fetchUser = async (id: string) => {
-  return await db.find(id);
-};
-`;
-    const result = extractFromSource('api.ts', code);
-
-    const funcNode = result.nodes.find((n) => n.kind === 'function' && n.name === 'fetchUser');
-    expect(funcNode).toBeDefined();
-    expect(funcNode?.isExported).toBe(true);
-  });
-
-  it('should not create duplicate nodes for arrow functions in export statements', () => {
-    const code = `
-export const compute = (x: number) => x * 2;
-`;
-    const result = extractFromSource('math.ts', code);
-
-    const funcNodes = result.nodes.filter((n) => n.kind === 'function' && n.name === 'compute');
-    // Should appear only once, not duplicated between extractFunctionVariable and extractFunction
-    expect(funcNodes).toHaveLength(1);
-  });
-});
-
 describe('Python Extraction', () => {
   it('should extract function definitions', () => {
     const code = `

src/extraction/grammars.ts

@@ -156,14 +156,6 @@ function loadGrammar(language: Language): unknown | null {
   }
 }
 
-/**
- * Get a grammar by language, loading it lazily if needed.
- * Exported for direct grammar access without parser initialization.
- */
-export function getGrammar(language: string): unknown | null {
-  return loadGrammar(language as Language);
-}
-
 /**
  * Get a parser for the specified language
  */

src/extraction/index.ts

@@ -487,7 +487,7 @@ export class ExtractionOrchestrator {
       };
     }
 
-    // Check file exists and is readable
+    // Read file content and stats
     let content: string;
     let stats: fs.Stats;
     try {
@@ -509,43 +509,7 @@ export class ExtractionOrchestrator {
       };
     }
 
-    // Check file size
-    if (stats.size > this.config.maxFileSize) {
-      return {
-        nodes: [],
-        edges: [],
-        unresolvedReferences: [],
-        errors: [
-          {
-            message: `File exceeds max size (${stats.size} > ${this.config.maxFileSize})`,
-            severity: 'warning',
-          },
-        ],
-        durationMs: 0,
-      };
-    }
-
-    // Detect language
-    const language = detectLanguage(relativePath);
-    if (!isLanguageSupported(language)) {
-      return {
-        nodes: [],
-        edges: [],
-        unresolvedReferences: [],
-        errors: [],
-        durationMs: 0,
-      };
-    }
-
-    // Extract from source
-    const result = extractFromSource(relativePath, content, language);
-
-    // Store in database
-    if (result.nodes.length > 0 || result.errors.length === 0) {
-      this.storeExtractionResult(relativePath, content, language, stats, result);
-    }
-
-    return result;
+    return this.indexFileWithContent(relativePath, content, stats);
   }
 
   /**

src/extraction/tree-sitter.ts

@@ -978,14 +978,6 @@ export class TreeSitterExtractor {
     else if (this.extractor.typeAliasTypes.includes(nodeType)) {
       this.extractTypeAlias(node);
     }
-    // Check for arrow functions / function expressions assigned to variables (JS/TS)
-    else if (nodeType === 'variable_declarator') {
-      const valueNode = getChildByField(node, 'value');
-      if (valueNode && (valueNode.type === 'arrow_function' || valueNode.type === 'function_expression')) {
-        this.extractFunctionVariable(node);
-        skipChildren = true;
-      }
-    }
     // Check for variable declarations (const, let, var, etc.)
     // Only extract top-level variables (not inside functions/methods)
     else if (this.extractor.variableTypes.includes(nodeType) && !this.isInsideClassLikeNode()) {
@@ -1109,62 +1101,6 @@ export class TreeSitterExtractor {
     );
   }
 
-  /**
-   * Extract an arrow function or function expression assigned to a variable.
-   * Handles patterns like: const foo = () => {} or const bar = function() {}
-   */
-  private extractFunctionVariable(node: SyntaxNode): void {
-    if (!this.extractor) return;
-
-    // Only handle variable_declarator where value is arrow_function or function_expression
-    if (node.type !== 'variable_declarator') return;
-
-    const nameNode = getChildByField(node, 'name');
-    const valueNode = getChildByField(node, 'value');
-
-    if (!nameNode || !valueNode) return;
-    if (valueNode.type !== 'arrow_function' && valueNode.type !== 'function_expression') return;
-
-    const name = getNodeText(nameNode, this.source);
-    if (!name) return;
-
-    // Check if exported by walking parents
-    let isExported = false;
-    let current = node.parent;
-    while (current) {
-      if (current.type === 'export_statement') {
-        isExported = true;
-        break;
-      }
-      if (current.type === 'program' || current.type === 'module') break;
-      current = current.parent;
-    }
-
-    // Build signature from the arrow function parameters
-    let signature: string | undefined;
-    const params = getChildByField(valueNode, 'parameters');
-    if (params) {
-      signature = `${name}${getNodeText(params, this.source)}`;
-    }
-
-    // Check if async
-    const isAsync = this.extractor.isAsync?.(valueNode);
-
-    const funcNode = this.createNode('function', name, node, {
-      isExported,
-      signature: signature || undefined,
-      isAsync,
-    });
-
-    // Push to stack and visit body for call extraction
-    this.nodeStack.push(funcNode.id);
-    const body = getChildByField(valueNode, this.extractor.bodyField);
-    if (body) {
-      this.visitFunctionBody(body, funcNode.id);
-    }
-    this.nodeStack.pop();
-  }
-
   /**
    * Extract a function
    */