Update gitignore

.gitignore

@@ -5,3 +5,4 @@ coverage.out
 SOLUTION.md
 FINDINGS.md
 PROGRESS.md
+CLAUDE.md

CLAUDE.md

@@ -1,59 +0,0 @@
-# TWIG GO PROJECT GUIDELINES
-
-## Project Overview
-This is a Go implementation of the Twig template engine, designed to be lightweight, efficient, and closely follow the original Twig syntax and behavior while maintaining Go idioms and best practices.
-
-## Development Rules
-
-### Code Style and Philosophy
-- Follow Go idioms and best practices
-- No external dependencies beyond the Go standard library
-- Clear and consistent naming conventions
-- Comprehensive documentation for public APIs
-- Expressive, readable code over clever tricks
-
-### Core Engine Rules
-- NEVER inject code directly into the core engine to work around failing tests
-- NEVER modify test expectations to match implementation - fix the implementation instead
-- Maintain backward compatibility whenever possible
-- Keep the API surface clean and consistent
-- Follow the original Twig semantics where appropriate
-
-### Testing Philosophy
-- All changes must pass existing tests
-- Add new tests for new features or bug fixes
-- Tests should be descriptive and illustrate usage
-- If a test is failing, analyze and fix the core issue, not the test
-
-### HTML Handling
-- Don't modify whitespace in HTML content
-- Only manage template code blocks, not the HTML itself
-- Preserve content structure and formatting
-
-### Build and Test Commands
-```bash
-# Run all tests
-go test ./...
-
-# Build the project
-go build
-
-# Format the code
-gofmt -w -s .
-
-# Lint the code
-go vet
-```
-
-### Project Structure
-- `parser.go`: Template parsing logic
-- `tokenizer.go`: Template tokenization
-- `expr.go`: Expression node definitions
-- `render.go`: Template rendering
-- `extension.go`: Extensions and filters
-- `twig.go`: Main engine API
-
-### Common Issues
-- Template parsing issues often relate to operator precedence or tokenization
-- Map key order is not guaranteed in Go - don't hardcode expected order in tests
-- For backwards compatibility, ensure all filters return the same types as the PHP Twig implementation