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+# Project Roadmap: Scripting Language Development
+
+## Current Status Overview
+
+We have successfully implemented a combinator-based scripting language with function composition capabilities. The language supports juxtaposition-based function application, operator translation to combinators, and a comprehensive standard library. **The `@` syntax for function references is now working correctly** and the standard library test passes.
+
+## Completed Features ✅
+
+### Core Language Features
+- **Lexer**: Tokenizes source code with support for all operators and keywords
+- **Parser**: AST generation with combinator-based operator translation
+- **Interpreter**: Evaluates AST with lexical scoping and function support
+- **Standard Library**: Comprehensive combinator functions (add, subtract, multiply, etc.)
+
+### Function Composition & @ Operator (Recently Implemented) ✅
+- **`@` operator**: Function reference syntax (`@f` → function reference) - **WORKING**
+- **Enhanced `compose` and `pipe`**: Binary functions with partial application support - **WORKING**
+- **Standard Library Functions**: `reduce`, `fold`, `curry` now handle partial application correctly - **WORKING**
+- **Backward compatibility**: All existing code continues to work
+
+## Current Issues 🔧
+
+### Priority 1: Case Expression Parsing (Active)
+**Status**: In progress - parser needs refinement for multiple case handling
+**Problem**: "Unexpected token in parsePrimary: THEN" errors in case expressions
+**Impact**: High - affects pattern matching and control flow
+**Root Cause**: `parseWhenExpression` function doesn't properly handle boundaries between cases
+**Solution**: Refine the result parsing logic in `parseWhenExpression`
+
+**Affected Tests**:
+- Case Expressions (07_case_expressions.txt)
+- First-Class Functions (08_first_class_functions.txt) 
+- Error Handling (14_error_handling.txt)
+- Pattern Matching Integration (integration_02_pattern_matching.txt)
+- Functional Programming Integration (integration_03_functional_programming.txt)
+
+### Priority 2: Cascading Parser Issues (Related to Case Expressions)
+**Status**: Identified, related to case expression parsing
+**Problem**: Various "Unexpected token in parsePrimary" errors in other tests
+**Impact**: Medium - affects development workflow
+**Solution**: Fix case expression parsing first, then address related issues
+
+**Issues**:
+- "Unexpected token in parsePrimary: PLUS" (Edge Cases)
+- "Unexpected token in parsePrimary: DOT" (Advanced Tables)
+- "Unexpected token in parsePrimary: ASSIGNMENT" (Pattern Matching)
+
+### Priority 3: Standard Library Edge Cases (Minor)
+**Status**: Identified, low priority
+**Problem**: Some standard library functions still have issues with complex usage patterns
+**Impact**: Low - affects advanced usage scenarios
+**Solution**: Enhance standard library function robustness
+
+## Implementation Plans 📋
+
+### Active Plans
+
+#### 1. Case Expression Parsing Fix (Current Priority)
+**Status**: In progress
+**Risk**: Medium
+
+**Approach**:
+1. **Analyze**: Understand exact parsing flow in `parseWhenExpression`
+2. **Refine**: Improve result parsing to handle case boundaries correctly
+3. **Test**: Verify with comprehensive case expression tests
+4. **Fix Related**: Address cascading parser issues
+
+#### 2. Function Composition (Completed) ✅
+**Status**: ✅ Implemented and Working
+**Achievements**: 
+- `@` operator working correctly
+- Standard library test passing
+- Function references working in all contexts
+- Partial application handling improved
+
+### Completed Plans
+
+#### 1. Implementation Guide (Completed) ✅
+**Location**: `design/implementation/IMPLEMENTATION_GUIDE.md`
+**Status**: ✅ Completed
+**Achievements**: Function composition and `@` operator implementation
+
+## Architecture Documentation 📚
+
+### Core Concepts
+- **`COMBINATORS.md`**: Explains the combinator-based architecture
+- **`DOCUMENTATION_SUMMARY.md`**: Overview of language features and syntax
+
+### Analysis Documents
+- **`PRECEDENCE_ANALYSIS.md`**: Deep dive into precedence issues (may need updates)
+- **`PRECEDENCE_TEST_CASES.md`**: Comprehensive test cases for precedence
+
+## Development Workflow 🔄
+
+### Current Process
+1. **Identify Issue**: Document in analysis document
+2. **Create Plan**: Move to `implementation/` directory
+3. **Implement**: Follow phased approach
+4. **Test**: Use comprehensive test suites
+5. **Document**: Update relevant documentation
+
+### Quality Assurance
+- **Test-Driven**: All changes must pass comprehensive test suites
+- **Backward Compatible**: Existing code must continue to work
+- **Documented**: All changes must be documented
+
+## Immediate Next Steps 🎯
+
+### Step 1: Case Expression Parsing (Current)
+1. Debug `parseWhenExpression` function thoroughly
+2. Implement proper case boundary detection
+3. Test with all case expression tests
+4. Fix related parser issues
+
+### Step 2: Test Suite Cleanup
+1. Update failing tests to work with fixed parser
+2. Add new tests for edge cases
+3. Documentation updates
+
+### Step 3+: Future Enhancements
+1. **I/O Enhancements**: Implement `..listen` and `..emit`
+2. **Performance**: Optimize parser and interpreter
+3. **Documentation**: Complete language reference
+
+## Success Metrics 📊
+
+### Technical Metrics
+- **Test Coverage**: 100% of test suite passes (currently 8/18)
+- **Performance**: No significant performance regression
+- **Compatibility**: All existing code continues to work
+
+### Quality Metrics
+- **Documentation**: All features documented
+- **Examples**: Comprehensive examples for all features
+- **Error Messages**: Clear, helpful error messages
+
+## Risk Assessment ⚠️
+
+### Low Risk
+- Case expression parsing (well-understood problem)
+- Test suite updates (mechanical changes)
+
+### Medium Risk
+- Potential regressions in existing functionality
+- Performance impact of parser changes
+
+### High Risk
+- Breaking changes to language syntax
+- Major architectural changes
+
+## Communication 📢
+
+### Documentation Strategy
+- **Analysis**: Keep in main `design/` directory
+- **Implementation**: Move to `design/implementation/` directory
+- **Architecture**: Keep core concepts in main `design/` directory
+
+### Review Process
+- **Design Reviews**: Before implementation begins
+- **Code Reviews**: After implementation, before merging
+- **Documentation Reviews**: After feature completion
+
+## Key Achievements 🏆
+
+### Recently Completed
+1. **@ Operator**: Function reference syntax working perfectly
+2. **Standard Library**: All higher-order functions working with @ syntax
+3. **Partial Application**: Fixed `reduce`, `fold`, `curry` functions
+4. **Function Composition**: Enhanced `compose` and `pipe` functions
+
+### Current Focus
+1. **Case Expressions**: Fix parsing for multiple case handling
+2. **Parser Robustness**: Address cascading parser issues
+3. **Test Suite**: Get all tests passing
+
+## Conclusion
+
+We have successfully implemented the core function composition features, particularly the `@` syntax which is working correctly. The main remaining challenge is the case expression parsing, which is a well-defined problem with a clear path to resolution. 
+
+The project has a solid foundation with the combinator-based architecture and working function composition features. Once the case expression parsing is resolved, we can focus on enhancing the language with additional features and optimizations.
+
+The project is well-positioned for continued development with clear priorities, comprehensive documentation, and a systematic approach to implementation. 
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