Parse JavaScript/TypeScript code from file or string and load it into the AST state. Must be called before using other analysis tools.

Examples: • Parse a React component: parse_code('./src/UserProfile.jsx') • Parse code string: parse_code('function hello() { return "world"; }') • Parse with explicit language: parse_code('./config.js', language='javascript') • Analyze legacy code: parse_code('./old-script.js') then use other tools to understand structure • Code review prep: parse_code('./feature.ts') then get_functions() to review all functions

Find first node matching the specified pattern using tree-hugger-js intuitive syntax. Use for targeted searches when you need one specific match.

Examples: • Find main function: find_pattern('function[name="main"]') • Find React component: find_pattern('function[name="UserProfile"]') • Find async functions: find_pattern('function[async]') • Find specific class: find_pattern('class[name="UserManager"]') • Find error handling: find_pattern('call[text*="catch"]') • Find JSX with props: find_pattern('jsx:has(jsx-attribute[name="className"])') • Debug specific calls: find_pattern('call[text*="console.log"]')

Find all nodes matching the specified pattern. Use for comprehensive analysis when you need all matches.

Examples: • Audit all functions: find_all_pattern('function') • Find all TODO comments: find_all_pattern('comment[text*="TODO"]') • Security audit: find_all_pattern('call[text*="eval"]') • Performance review: find_all_pattern('call[text*="console.log"]') to find debug logs • API usage: find_all_pattern('call[text*="fetch"]') to find all API calls • React hooks: find_all_pattern('call[text*="use"]') for hooks usage • Error patterns: find_all_pattern('string[text*="error"]') for error messages • Database queries: find_all_pattern('string[text*="SELECT"]') for SQL • Event handlers: find_all_pattern('function[text*="onClick"]')

Get all functions with metadata including name, type, location, and async status. Includes class methods, arrow functions, and declarations.

Examples: • Code review: get_functions() to see all functions in a file • Find async operations: get_functions({asyncOnly: true}) • API analysis: get_functions() then look for functions with 'fetch' or 'api' in names • Test coverage: get_functions() to identify functions needing tests • Refactoring prep: get_functions({includeAnonymous: false}) to focus on named functions • Performance audit: get_functions() to find large/complex functions by line count

Get all classes with comprehensive method and property analysis. Perfect for OOP code review.

Examples: • Architecture review: get_classes() to understand class structure • API design: get_classes() to see public method interfaces • Inheritance analysis: get_classes() to identify class hierarchies • Method-only view: get_classes({includeProperties: false}) to focus on behavior • Property audit: get_classes({includeMethods: false}) to review state management • Testing prep: get_classes() to identify methods needing unit tests

Get all import statements with detailed module and specifier information. Essential for dependency analysis.

Examples: • Dependency audit: get_imports() to see all external dependencies • Bundle analysis: get_imports() to identify heavy imports • Security audit: get_imports() to check for suspicious packages • TypeScript analysis: get_imports({includeTypeImports: false}) to focus on runtime imports • Refactoring prep: get_imports() to understand module structure before changes • License compliance: get_imports() to generate dependency list

Intelligently rename all occurrences of an identifier throughout the code. Avoids renaming in strings/comments.

Examples: • Refactor function names: rename_identifier('fetchData', 'fetchUserData') • Improve variable names: rename_identifier('data', 'userData') • Update class names: rename_identifier('Manager', 'UserManager') • API consistency: rename_identifier('getUserInfo', 'fetchUserInfo') • Preview first: rename_identifier('oldName', 'newName', {preview: true}) • Legacy code update: rename_identifier('XMLHttpRequest', 'fetch')

Automatically remove unused import statements to clean up code. Safely detects which imports are actually used.

Examples: • Bundle size optimization: remove_unused_imports() to reduce bundle size • Code cleanup: remove_unused_imports() after refactoring • Linting compliance: remove_unused_imports() to fix ESLint warnings • Before deployment: remove_unused_imports({preview: true}) to see what will be removed • Legacy cleanup: remove_unused_imports() after removing old code • Development workflow: remove_unused_imports() during feature development

Apply multiple transformations in a single operation. Most powerful tool for complex refactoring workflows.

Examples: • API refactor: [{type: 'rename', parameters: {oldName: 'getData', newName: 'fetchData'}}, {type: 'removeUnusedImports'}] • Environment update: [{type: 'replaceIn', parameters: {nodeType: 'string', pattern: /localhost/g, replacement: 'api.production.com'}}, {type: 'removeUnusedImports'}] • Add logging: [{type: 'insertAfter', parameters: {pattern: 'function_declaration', text: 'console.log("Function called");'}}, {type: 'removeUnusedImports'}] • Bulk rename: [{type: 'rename', parameters: {oldName: 'user', newName: 'customer'}}, {type: 'rename', parameters: {oldName: 'id', newName: 'customerId'}}] • Legacy migration: [{type: 'replaceIn', parameters: {nodeType: 'call_expression', pattern: /XMLHttpRequest/g, replacement: 'fetch'}}, {type: 'removeUnusedImports'}]

Get detailed AST node information at a specific cursor position. Perfect for debugging and precise analysis.

Examples: • Debug syntax errors: get_node_at_position(15, 23) to understand what's at error location • Understand code structure: get_node_at_position(line, col) to see AST node type at cursor • Refactoring assistance: get_node_at_position(line, col) to identify exact node before transformation • IDE integration: get_node_at_position(line, col) for hover information • Pattern development: get_node_at_position(line, col) to understand node structure for pattern writing

Analyze variable scopes, bindings, and potential naming conflicts. Advanced tool for code quality analysis.

Examples: • Variable shadowing detection: analyze_scopes() to find naming conflicts • Closure analysis: analyze_scopes() to understand variable capture • Refactoring safety: analyze_scopes() before variable renames • Code review: analyze_scopes() to identify scope-related issues • Learning aid: analyze_scopes({includeBuiltins: true}) to see all identifiers • Dead code detection: analyze_scopes() to find unused variables

Insert code before or after nodes with smart formatting. Professional-quality code insertion with proper indentation.

Examples: • Add logging: insert_code('function_declaration', 'console.log("Function started");', 'after') • Add validation: insert_code('method_definition[name="save"]', 'if (!this.isValid()) return;', 'after') • Add comments: insert_code('class_declaration', '// Main user management class', 'before') • Add error handling: insert_code('function[async]', 'try {', 'after') + insert_code('function[async]', '} catch(e) { console.error(e); }', 'after') • Add metrics: insert_code('function[name*="api"]', 'performance.mark("api-start");', 'after') • Debug mode: insert_code('call[text*="fetch"]', 'console.log("API call:", url);', 'before')