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-# Baba Yaga C Implementation Roadmap
-
-## Current Status
-- ✅ **Core Language**: Complete and stable (25/27 tests passing)
-- ✅ **Table Pattern Matching**: Fixed and working
-- ✅ **When Expressions**: Fixed and working
-- ✅ **Computed Table Keys**: Fixed and working (Task 1.1 complete)
-- ✅ **Multi-value Pattern Expressions**: Fixed and working (Task 1.2 complete)
-- ✅ **Pattern Matching Memory**: Fixed and working (Task 1.3 complete)
-- ✅ **Partial Application Support**: Fixed and working (Task 2.3 complete)
-- ❌ **2 Remaining Issues**: Test 22 parser issue, Integration Test 02 file reading issue
-
-## Quick Reference
-- **Test Command**: `./bin/baba-yaga tests/22_parser_limitations.txt`
-- **Key Files**: `src/parser.c` (parser_parse_when_pattern), `tests/22_parser_limitations.txt`
-- **Current Error**: `Parse error: Expected 'is' after test expression`
-- **Working Test**: `echo "test_multi_expr : x y -> when (x % 2) (y % 2) is 0 0 then \"both even\";" | ./bin/baba-yaga`
-
-## Implementation Plan
-
-### **Phase 1: Core Language Features** ✅ **COMPLETE**
-All core language features are now working correctly.
-
-### **Phase 2: Advanced Features** ✅ **COMPLETE**
-All advanced features including partial application are now working.
-
-### **Phase 3: Final Polish** 🔄 **IN PROGRESS**
-
-#### **Task 3.1: Test 22 Parser Issue** (Test 22) 🔍 **INVESTIGATED**
-**Issue**: `Parse error: Expected 'is' after test expression`
-**Current**: Core multi-value pattern functionality works correctly
-**Status**: Identified specific parser edge case - needs investigation
-
-**Investigation Findings**:
-- ✅ **Individual functions work**: Multi-value patterns parse and execute correctly when tested individually
-- ✅ **Isolated syntax works**: Same syntax works perfectly when tested via `echo`
-- ❌ **File-specific issue**: The error only occurs when the complete test file is processed
-- 🔍 **Parser edge case**: The issue appears to be in how the parser handles multiple patterns in sequence within a file context
-- 📍 **Error location**: Parser fails to recognize the `is` keyword in multi-value pattern context when processing the full file
-
-**Root Cause Analysis**:
-- The parser's `parser_parse_when_pattern` function may have an edge case when processing multiple patterns in sequence
-- The error suggests the parser is not correctly transitioning between pattern parsing states
-- This is likely a subtle parsing state management issue rather than a fundamental syntax problem
-
-#### **Task 3.2: Integration Test 02 File Reading** (Integration Test 02)
-**Issue**: Segmentation fault when reading file directly (works when piped)
-**Current**: Core pattern matching works, but file reading has issue
-**Status**: Need to fix file reading mechanism
-
-## **Recent Achievements**
-
-### **Task 2.3: Partial Application Support** ✅ **COMPLETE**
-- **Issue**: Test 17 failed with partial application and arity errors
-- **Solution**: Implemented proper partial application in function call mechanism
-- **Implementation**: 
-  - Modified `baba_yaga_function_call` to handle partial application
-  - Created `stdlib_partial_apply` helper function
-  - Updated `each` function to support partial application
-- **Result**: Test 17 now passes, 25/27 tests passing
-
-### **Task 1.2: Multi-value Pattern Expressions** ✅ **COMPLETE**
-- **Issue**: `when (x % 2) (y % 2) is` not supported
-- **Solution**: Enhanced parser to handle expressions in parentheses for multi-parameter patterns
-- **Implementation**: Added detection for multi-parameter patterns with expressions
-- **Result**: Multi-value pattern expressions now work correctly
-
-### **Task 1.3: Pattern Matching Memory** ✅ **COMPLETE**
-- **Issue**: Segmentation fault in complex pattern matching
-- **Solution**: Implemented sequence-to-sequence pattern matching for multi-parameter patterns
-- **Implementation**: Added element-by-element comparison logic for multi-parameter patterns
-- **Result**: Complex nested pattern matching now works correctly
-
-## **Next Priority**
-**Task 3.1**: Fix Test 22 parser edge case to achieve 26/27 tests passing
-**Task 3.2**: Fix Integration Test 02 file reading issue to achieve 27/27 tests passing
-
-## Technical Notes
-
-### **Partial Application Implementation**
-- **Function Call Mechanism**: Modified `baba_yaga_function_call` to detect insufficient arguments
-- **Partial Function Creation**: Creates new function with bound arguments stored in scope
-- **Argument Combination**: `stdlib_partial_apply` combines bound and new arguments
-- **Scope Management**: Uses temporary scope variables to store partial application data
-
-### **Pattern Matching Enhancements**
-- **Multi-parameter Support**: Handles `when (expr1) (expr2) is` syntax
-- **Sequence Comparison**: Element-by-element comparison for multi-value patterns
-- **Wildcard Support**: `_` pattern matches any value in multi-parameter contexts
-
-### **Parser Investigation Results**
-- **Multi-value patterns work correctly** in isolation and individual function definitions
-- **File processing edge case** identified in `parser_parse_when_pattern` function
-- **State management issue** suspected when processing multiple patterns in sequence
-- **Error occurs specifically** when the complete test file is processed, not in isolated tests
-
-### **Memory Management**
-- **Reference Counting**: Proper cleanup of function references
-- **Scope Cleanup**: Automatic cleanup of temporary scope variables
-- **Error Handling**: Graceful handling of memory allocation failures
-
-## Next Action
-**Continue with Task 3.1** (Test 22 Parser Issue) - investigate and fix the parser edge case in `parser_parse_when_pattern` function to achieve 26/27 tests passing.
-
-## Implementation Guide
-
-### **For Task 3.1: Test 22 Parser Issue**
-1. **Investigate `parser_parse_when_pattern` function**: Look for state management issues when processing multiple patterns
-2. **Debug the specific failing case**: Add debug output to understand why the parser fails to recognize `is` keyword
-3. **Fix the parser logic**: Update the parser to handle the edge case correctly
-4. **Test the fix**: Verify that Test 22 now passes
-
-### **For Task 3.2: Integration Test 02 File Reading**
-1. **Investigate the file reading issue**: Compare direct file reading vs piped input
-2. **Identify the root cause**: Find why direct file reading causes segmentation fault
-3. **Fix the file reading mechanism**: Update the file reading code to handle the issue
-4. **Test the fix**: Verify that Integration Test 02 now passes
-
-### **For CLI Ergonomics**
-1. **Simplify the REPL**: Make it more minimal and interactive
-2. **Improve error messages**: Better error reporting and debugging
-3. **Add helpful features**: Command history, line editing, etc.
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