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diff --git a/js/scripting-lang/tests/run_shared_tests.sh b/js/scripting-lang/tests/run_shared_tests.sh
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+#!/bin/bash
+
+# Shared Test Runner for Baba Yaga Language
+# Works with both JS and C implementations
+# Usage: ./run_shared_tests.sh <js|c> [test_category]
+
+echo "=== Baba Yaga Shared Test Suite ==="
+echo ""
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# Check implementation argument
+if [ $# -lt 1 ]; then
+    echo "Usage: $0 <js|c> [unit|integration|turing|all]"
+    echo "  js  - Run tests with JavaScript implementation"
+    echo "  c   - Run tests with C implementation"
+    echo "  Categories: unit, integration, turing, all (default: all)"
+    exit 1
+fi
+
+IMPL=$1
+CATEGORY=${2:-all}
+
+# Set up execution command based on implementation
+case $IMPL in
+    "js")
+        if [ ! -f "js/lang.js" ]; then
+            echo -e "${RED}Error: JavaScript implementation not found at js/lang.js${NC}"
+            exit 1
+        fi
+        EXEC_CMD="bun js/lang.js"
+        echo "Using JavaScript implementation (bun js/lang.js)"
+        ;;
+    "c")
+        if [ ! -f "c/bin/baba-yaga" ]; then
+            echo -e "${RED}Error: C implementation not found at c/bin/baba-yaga${NC}"
+            echo "Please build the C implementation first: cd c && make"
+            exit 1
+        fi
+        EXEC_CMD="c/bin/baba-yaga"
+        echo "Using C implementation (c/bin/baba-yaga)"
+        ;;
+    *)
+        echo -e "${RED}Error: Invalid implementation '$IMPL'. Use 'js' or 'c'${NC}"
+        exit 1
+        ;;
+esac
+
+echo ""
+
+# Function to run a test file
+run_test() {
+    local test_file=$1
+    local test_name=$2
+    
+    echo -n "Running $test_name... "
+    
+    # Execute the test and capture output
+    local output
+    local exit_code
+    
+    if [ "$IMPL" = "js" ]; then
+        output=$(DEBUG="$DEBUG" $EXEC_CMD "$test_file" 2>&1)
+    else
+        # For C implementation, we need to run the file content
+        output=$($EXEC_CMD -f "$test_file" 2>&1)
+    fi
+    exit_code=$?
+    
+    if [ $exit_code -eq 0 ]; then
+        echo -e "${GREEN}PASS${NC}"
+        # Show debug output if DEBUG is set
+        if [ -n "$DEBUG" ]; then
+            echo "$output"
+        fi
+        return 0
+    else
+        echo -e "${RED}FAIL${NC}"
+        echo -e "${RED}Error:${NC} $output"
+        return 1
+    fi
+}
+
+# Counters
+total_tests=0
+passed_tests=0
+failed_tests=0
+
+# Run unit tests
+if [ "$CATEGORY" = "unit" ] || [ "$CATEGORY" = "all" ]; then
+    echo "Running Unit Tests..."
+    echo "===================="
+    
+    # Core unit tests (in order)
+    unit_tests=(
+        "tests/unit/01_lexer_basic.txt:Basic Lexer"
+        "tests/unit/02_arithmetic_operations.txt:Arithmetic Operations"
+        "tests/unit/03_comparison_operators.txt:Comparison Operators"
+        "tests/unit/04_logical_operators.txt:Logical Operators"
+        "tests/unit/05_io_operations.txt:IO Operations"
+        "tests/unit/06_function_definitions.txt:Function Definitions"
+        "tests/unit/07_case_expressions.txt:Case Expressions"
+        "tests/unit/08_first_class_functions.txt:First-Class Functions"
+        "tests/unit/09_tables.txt:Tables"
+        "tests/unit/10_standard_library.txt:Standard Library"
+        "tests/unit/11_edge_cases.txt:Edge Cases"
+        "tests/unit/12_advanced_tables.txt:Advanced Tables"
+        "tests/unit/13_standard_library_complete.txt:Complete Standard Library"
+        "tests/unit/14_error_handling.txt:Error Handling"
+        "tests/unit/15_performance_stress.txt:Performance and Stress"
+        "tests/unit/16_function_composition.txt:Advanced Functional Programming"
+        "tests/unit/17_table_enhancements.txt:Table Enhancements"
+        "tests/unit/18_new_table_operations.txt:New Table Operations"
+        "tests/unit/18_each_combinator.txt:Each Combinator"
+        "tests/unit/19_embedded_functions.txt:Embedded Functions"
+        "tests/unit/20_via_operator.txt:Via Operator"
+        "tests/unit/21_enhanced_case_statements.txt:Enhanced Case Statements"
+        "tests/unit/22_parser_limitations.txt:Parser Limitations"
+        "tests/unit/23_minus_operator_spacing.txt:Minus Operator Spacing"
+    )
+    
+    for test in "${unit_tests[@]}"; do
+        IFS=':' read -r file name <<< "$test"
+        if [ -f "$file" ]; then
+            total_tests=$((total_tests + 1))
+            
+            if run_test "$file" "$name"; then
+                passed_tests=$((passed_tests + 1))
+            else
+                failed_tests=$((failed_tests + 1))
+            fi
+        fi
+    done
+    echo ""
+fi
+
+# Run integration tests
+if [ "$CATEGORY" = "integration" ] || [ "$CATEGORY" = "all" ]; then
+    echo "Running Integration Tests..."
+    echo "==========================="
+    
+    integration_tests=(
+        "tests/integration/integration_01_basic_features.txt:Basic Features Integration"
+        "tests/integration/integration_02_pattern_matching.txt:Pattern Matching Integration"
+        "tests/integration/integration_03_functional_programming.txt:Functional Programming Integration"
+        "tests/integration/integration_04_mini_case_multi_param.txt:Multi-parameter Case Expression"
+    )
+    
+    for test in "${integration_tests[@]}"; do
+        IFS=':' read -r file name <<< "$test"
+        if [ -f "$file" ]; then
+            total_tests=$((total_tests + 1))
+            
+            if run_test "$file" "$name"; then
+                passed_tests=$((passed_tests + 1))
+            else
+                failed_tests=$((failed_tests + 1))
+            fi
+        fi
+    done
+    echo ""
+fi
+
+# Run Turing completeness tests
+if [ "$CATEGORY" = "turing" ] || [ "$CATEGORY" = "all" ]; then
+    echo "Running Turing Completeness Tests..."
+    echo "==================================="
+    
+    turing_tests=(
+        "tests/turing-completeness/01_basic_proof.txt:Basic Turing Completeness Proof"
+        "tests/turing-completeness/02_recursion_demo.txt:Recursion Demonstrations"
+        "tests/turing-completeness/03_data_demo.txt:Data Structure Demonstrations"
+        "tests/turing-completeness/04_simple_functions.txt:Function Demonstrations"
+        "tests/turing-completeness/05_loops_and_state.txt:Loops and State Management"
+        "tests/turing-completeness/06_lambda_calculus.txt:Lambda Calculus Foundations"
+        "tests/turing-completeness/07_complex_algorithms.txt:Complex Algorithms"
+    )
+    
+    for test in "${turing_tests[@]}"; do
+        IFS=':' read -r file name <<< "$test"
+        if [ -f "$file" ]; then
+            total_tests=$((total_tests + 1))
+            
+            if run_test "$file" "$name"; then
+                passed_tests=$((passed_tests + 1))
+            else
+                failed_tests=$((failed_tests + 1))
+            fi
+        fi
+    done
+    echo ""
+fi
+
+# Summary
+echo "=== Test Summary ==="
+echo "Implementation: $IMPL"
+echo "Category: $CATEGORY"
+echo "Total tests: $total_tests"
+echo -e "Passed: ${GREEN}$passed_tests${NC}"
+echo -e "Failed: ${RED}$failed_tests${NC}"
+
+if [ $failed_tests -eq 0 ]; then
+    echo -e "${GREEN}All tests passed!${NC}"
+    echo -e "${BLUE}✅ Both implementations are consistent!${NC}"
+    exit 0
+else
+    echo -e "${RED}Some tests failed.${NC}"
+    echo -e "${YELLOW}This indicates differences between implementations.${NC}"
+    exit 1
+fi
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