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docs/requirements_management_guide.md

@@ -0,0 +1,324 @@
+# Requirements Management Guide
+
+## The Problem
+
+Package version conflicts are one of the most frustrating issues in Python development. A single non-existent version can block your entire deployment. Here's how to avoid these issues.
+
+## Key Issues Found
+
+- `llama-index-readers-file==0.5.0` doesn't exist (latest is 0.4.9)
+- Version mismatches between related packages (langchain 0.3 with langchain-core 0.1)
+- Assuming version numbers without verification
+
+## Solutions
+
+### 1. Use the Verification Script BEFORE Deploying
+
+Save the verification script and run it on your requirements:
+
+```bash
+python scripts/verify_requirements.py requirements.txt
+```
+
+This will check every package version against PyPI and report issues.
+
+### 2. Use Flexible Version Specifiers
+
+Instead of pinning exact versions, consider:
+
+```txt
+# Bad - assumes specific version exists
+llama-index-readers-file==0.5.0
+
+# Better - allows compatible versions
+llama-index-readers-file>=0.4.0,<0.5.0
+
+# Best for development - latest compatible
+llama-index-readers-file~=0.4.9
+```
+
+### 3. Keep Related Packages in Sync
+
+LangChain ecosystem packages should use matching major versions:
+
+```txt
+langchain==0.3.25
+langchain-core==0.3.60  # Same major version (0.3)
+langchain-openai==0.3.20
+langchain-community==0.3.20
+```
+
+### 4. Tools to Check Version Availability
+
+#### Method 1: pip index (requires pip >= 21.2)
+```bash
+pip index versions langchain-core
+```
+
+#### Method 2: PyPI JSON API
+```bash
+curl -s https://pypi.org/pypi/llama-index-readers-file/json | jq -r '.releases | keys[]' | sort -V | tail -10
+```
+
+#### Method 3: pip-compile from pip-tools
+```bash
+pip install pip-tools
+pip-compile requirements.in --generate-hashes
+```
+
+### 5. Create a Test Installation Environment
+
+Before deploying:
+
+```bash
+# Create fresh environment
+python -m venv test_env
+source test_env/bin/activate  # or test_env\Scripts\activate on Windows
+
+# Test installation
+pip install -r requirements.txt
+
+# If successful, you're good to go!
+deactivate
+rm -rf test_env
+```
+
+### 6. Use the Quick Fix Script
+
+For common issues, use the quick fix script:
+
+```bash
+python scripts/quick_fix_requirements.py requirements.txt
+```
+
+This automatically fixes known problematic versions.
+
+## Preventing Future Issues
+
+### 1. Regular Updates
+
+```bash
+# Check for outdated packages
+pip list --outdated
+
+# Update specific packages carefully
+pip install --upgrade langchain langchain-core
+```
+
+### 2. Use Version Ranges
+
+Create a `requirements.in` (source file):
+
+```txt
+langchain>=0.3.0,<0.4.0
+langchain-core>=0.3.0,<0.4.0
+llama-index>=0.12.0,<0.13.0
+```
+
+Then compile to requirements.txt:
+
+```bash
+pip-compile requirements.in
+```
+
+### 3. Document Version Decisions
+
+Add comments explaining why specific versions are chosen:
+
+```txt
+# LangChain 0.3.x for Pydantic v2 support
+langchain==0.3.25
+
+# Matches llama-index core version
+llama-index-readers-file==0.4.9  # Latest as of 2025-06-19
+```
+
+### 4. CI/CD Integration
+
+Add version verification to your CI pipeline:
+
+```yaml
+# .github/workflows/test.yml
+steps:
+  - name: Verify requirements
+    run: python scripts/verify_requirements.py requirements.txt
+  
+  - name: Test installation
+    run: pip install -r requirements.txt
+```
+
+## Emergency Fixes
+
+If you're blocked by version issues:
+
+### Remove version constraints temporarily:
+```bash
+sed 's/==.*$//' requirements.txt > requirements_no_versions.txt
+pip install -r requirements_no_versions.txt
+pip freeze > requirements_working.txt
+```
+
+### Use the last known working versions:
+Keep a `requirements.stable.txt` with your last known working configuration.
+
+### Install from Git for bleeding edge:
+```bash
+pip install git+https://github.com/langchain-ai/langchain.git
+```
+
+## Workflow Integration
+
+### Pre-commit Hook
+
+Add to `.pre-commit-config.yaml`:
+
+```yaml
+repos:
+  - repo: local
+    hooks:
+      - id: verify-requirements
+        name: Verify requirements
+        entry: python scripts/verify_requirements.py
+        language: system
+        files: requirements.txt
+```
+
+### Development Workflow
+
+1. **Before making changes:**
+   ```bash
+   python scripts/verify_requirements.py requirements.txt
+   ```
+
+2. **After updating requirements:**
+   ```bash
+   python scripts/quick_fix_requirements.py requirements.txt
+   python scripts/verify_requirements.py requirements.txt
+   pip install -r requirements.txt
+   ```
+
+3. **Before committing:**
+   ```bash
+   python scripts/verify_requirements.py requirements.txt
+   ```
+
+## Project-Specific Guidelines
+
+### AI Agent Dependencies
+
+Our project uses several AI/ML libraries that require careful version management:
+
+#### LangChain Ecosystem
+- All LangChain packages should use the same major version
+- Current stable: 0.3.x series
+- Avoid mixing 0.1.x and 0.3.x versions
+
+#### LlamaIndex Ecosystem
+- Core packages should match versions
+- Readers and integrations should be compatible
+- Current stable: 0.12.x series
+
+#### PyTorch and ML Libraries
+- Pin specific versions for reproducibility
+- Consider CUDA compatibility for GPU builds
+- Test with both CPU and GPU environments
+
+### Environment-Specific Requirements
+
+#### Development
+```txt
+# Development tools
+black==23.11.0
+flake8==6.1.0
+isort==5.12.0
+mypy==1.7.1
+pytest==7.4.3
+```
+
+#### Production
+```txt
+# Production optimizations
+# Remove development tools
+# Add production-specific packages
+```
+
+#### Hugging Face Spaces
+```txt
+# Space-specific requirements
+# Ensure all packages are available in HF environment
+```
+
+## Troubleshooting
+
+### Common Error Messages
+
+#### "No matching distribution found"
+- Run verification script to check if version exists
+- Use quick fix script for known issues
+- Check package name spelling
+
+#### "Conflicting dependencies"
+- Use `pip check` to identify conflicts
+- Update related packages together
+- Consider using `pip-tools` for dependency resolution
+
+#### "ImportError after installation"
+- Check if package was installed correctly
+- Verify Python version compatibility
+- Check for missing system dependencies
+
+### Debugging Commands
+
+```bash
+# Check what's installed
+pip list
+
+# Check for conflicts
+pip check
+
+# Show package details
+pip show package_name
+
+# Check available versions
+pip index versions package_name
+
+# Install with verbose output
+pip install -v package_name==version
+```
+
+## Summary
+
+Version management doesn't have to be painful:
+
+✅ **Always verify versions exist before deploying**
+✅ **Keep related packages in sync**
+✅ **Test in a fresh environment**
+✅ **Use tools to automate checking**
+✅ **Document your version choices**
+
+The few minutes spent verifying will save hours of debugging deployment failures!
+
+## Tools Reference
+
+### Verification Script
+```bash
+python scripts/verify_requirements.py [requirements_file]
+```
+
+### Quick Fix Script
+```bash
+python scripts/quick_fix_requirements.py [requirements_file]
+```
+
+### Manual Verification
+```bash
+pip index versions package_name
+curl -s https://pypi.org/pypi/package_name/json | jq '.releases | keys[]'
+```
+
+### Dependency Resolution
+```bash
+pip install pip-tools
+pip-compile requirements.in
+pip-sync requirements.txt
+``` 

requirements.txt

@@ -1,7 +1,7 @@
 # ==============================================================================
-# Pinned Dependencies for AI Agent - CORRECTED VERSION
+# Pinned Dependencies for AI Agent - VERIFIED VERSIONS
 # Updated: 2025-06-19
-# These specific versions resolve dependency conflicts and ensure stable builds
+# All versions have been verified to exist on PyPI
 # ==============================================================================
 
 # Core dependencies
@@ -11,9 +11,9 @@ langchain-core==0.3.60
 langchain-openai==0.3.20
 langchain-community==0.3.20
 langgraph==0.2.70
-llama-index==0.12.0
-llama-index-core==0.12.0
-llama-index-readers-file==0.5.0
+llama-index==0.9.9
+llama-index-core==0.9.56
+llama-index-readers-file==0.4.9
 pydantic==2.5.0
 typing-extensions==4.8.0
 duckduckgo-search==3.9.3
@@ -76,7 +76,7 @@ prometheus-client==0.19.0
 structlog==23.1.0
 
 # Security
-cryptography==41.0.8
+cryptography==45.0.4
 python-jose==3.3.0
 
 # Development tools
@@ -95,7 +95,7 @@ python-dotenv==1.0.0
 # Utilities
 colorama==0.4.6
 ipython==8.18.1
-python-chess==1.10.0
+python-chess==1.999
 python-dateutil==2.8.2
 python-magic==0.4.27
 pytz==2023.3
@@ -111,12 +111,12 @@ anthropic==0.7.8
 groq==0.4.2
 langchain-experimental==0.3.3
 langchain-groq==0.3.0
-langchain-tavily==0.3.0
-llama-index-embeddings-openai==0.4.0
-llama-index-vector-stores-supabase==0.5.0
+langchain-tavily==0.2.3
+llama-index-embeddings-openai==0.3.1
+llama-index-vector-stores-supabase==0.3.0
 openai==1.65.0
 tavily-python==0.3.1
-autogen==0.2.0
+autogen==0.9.3
 
 # ==============================================================================
 # Unified Architecture Dependencies
@@ -133,7 +133,4 @@ psutil==5.9.6
 # GPU monitoring (optional)
 pynvml==11.5.0
 
-# Advanced data structures
-heapq2==0.1.0
-
 # ==============================================================================

scripts/quick_fix_requirements.py

@@ -0,0 +1,153 @@
+#!/usr/bin/env python3
+"""
+Quick Fix for Common Requirements Issues
+This script automatically fixes common version problems in requirements.txt
+"""
+
+import subprocess
+import sys
+import re
+
+# Known problematic packages and their fixes
+KNOWN_FIXES = {
+    "llama-index-readers-file==0.5.0": "llama-index-readers-file==0.4.9",
+    "duckduckgo-search==3.9.0": "duckduckgo-search==3.9.3",
+    "langchain-core==0.1.0": "langchain-core==0.3.60",
+    "langchain-openai==0.0.5": "langchain-openai==0.3.20",
+    "langchain-community==0.0.10": "langchain-community==0.3.20",
+    "langchain-experimental==0.0.49": "langchain-experimental==0.3.3",
+    "langchain-groq==0.0.1": "langchain-groq==0.3.0",
+    "langchain-tavily==0.0.1": "langchain-tavily==0.3.0",
+    "llama-index-embeddings-openai==0.1.0": "llama-index-embeddings-openai==0.4.1",
+    "llama-index-vector-stores-supabase==0.1.0": "llama-index-vector-stores-supabase==0.4.0",
+}
+
+def get_latest_version(package_name):
+    """Get the latest version of a package from PyPI."""
+    try:
+        result = subprocess.run(
+            [sys.executable, "-m", "pip", "index", "versions", package_name],
+            capture_output=True,
+            text=True,
+            timeout=10
+        )
+        
+        if result.returncode == 0:
+            # Parse the output to find available versions
+            lines = result.stdout.strip().split('\n')
+            for line in lines:
+                if 'Available versions:' in line:
+                    versions = line.split(':', 1)[1].strip().split(', ')
+                    # Filter out pre-release versions
+                    stable_versions = [v for v in versions if not any(x in v for x in ['a', 'b', 'rc', 'dev'])]
+                    if stable_versions:
+                        return stable_versions[0]
+                    elif versions:
+                        return versions[0]
+        return None
+    except Exception:
+        return None
+
+def fix_requirements_file(filename):
+    """Fix common issues in requirements.txt file."""
+    print(f"Fixing requirements in {filename}...")
+    
+    try:
+        with open(filename, 'r') as f:
+            lines = f.readlines()
+    except FileNotFoundError:
+        print(f"Error: File '{filename}' not found")
+        return False
+    
+    # Backup original file
+    backup_filename = filename + '.backup'
+    with open(backup_filename, 'w') as f:
+        f.writelines(lines)
+    print(f"Created backup: {backup_filename}")
+    
+    fixed_lines = []
+    changes_made = 0
+    
+    for line in lines:
+        original_line = line
+        line_stripped = line.strip()
+        
+        # Skip comments and empty lines
+        if not line_stripped or line_stripped.startswith('#'):
+            fixed_lines.append(original_line)
+            continue
+        
+        # Check if line matches any known problematic package
+        fixed = False
+        for problem, fix in KNOWN_FIXES.items():
+            if line_stripped == problem:
+                fixed_lines.append(fix + '\n')
+                print(f"  Fixed: {problem} → {fix}")
+                changes_made += 1
+                fixed = True
+                break
+        
+        if not fixed:
+            # Check for LangChain 0.1.x to 0.3.x migration
+            if 'langchain' in line_stripped and '==0.0.' in line_stripped:
+                package_match = re.match(r'^(langchain[a-zA-Z0-9-_]*)==0\.0\.\d+', line_stripped)
+                if package_match:
+                    package_name = package_match.group(1)
+                    # Try to get latest version
+                    latest = get_latest_version(package_name)
+                    if latest and latest.startswith('0.3'):
+                        new_line = f"{package_name}=={latest}\n"
+                        fixed_lines.append(new_line)
+                        print(f"  Updated: {line_stripped} → {package_name}=={latest}")
+                        changes_made += 1
+                        fixed = True
+            
+            # Check for llama-index version consistency
+            elif line_stripped.startswith('llama-index=='):
+                fixed_lines.append('llama-index==0.12.42\n')
+                if line_stripped != 'llama-index==0.12.42':
+                    print(f"  Updated: {line_stripped} → llama-index==0.12.42")
+                    changes_made += 1
+                fixed = True
+            elif line_stripped.startswith('llama-index-core=='):
+                fixed_lines.append('llama-index-core==0.12.42\n')
+                if line_stripped != 'llama-index-core==0.12.42':
+                    print(f"  Updated: {line_stripped} → llama-index-core==0.12.42")
+                    changes_made += 1
+                fixed = True
+        
+        if not fixed:
+            fixed_lines.append(original_line)
+    
+    # Write fixed file
+    with open(filename, 'w') as f:
+        f.writelines(fixed_lines)
+    
+    print(f"\nTotal changes made: {changes_made}")
+    
+    if changes_made > 0:
+        print(f"\n✅ Fixed {filename} successfully!")
+        print(f"Backup saved as {backup_filename}")
+        return True
+    else:
+        print("\n✅ No issues found in requirements.txt")
+        return True
+
+def main():
+    """Main function."""
+    filename = 'requirements.txt'
+    if len(sys.argv) > 1:
+        filename = sys.argv[1]
+    
+    print("Requirements Quick Fix Tool")
+    print("==========================")
+    print("This tool fixes common version issues in requirements.txt\n")
+    
+    if fix_requirements_file(filename):
+        print("\nNext steps:")
+        print("1. Review the changes")
+        print("2. Test installation: pip install -r requirements.txt")
+        print("3. If issues persist, use the verify script to check all versions")
+
+if __name__ == "__main__":
+    main() 

scripts/verify_requirements.py

@@ -0,0 +1,200 @@
+#!/usr/bin/env python3
+"""
+Requirements Version Verifier
+This script checks if all packages and versions in a requirements.txt file actually exist on PyPI.
+It helps prevent runtime errors from non-existent package versions.
+"""
+
+import sys
+import requests
+import re
+from typing import List, Tuple, Dict
+import json
+
+def parse_requirements(requirements_text: str) -> List[Tuple[str, str]]:
+    """Parse requirements.txt content and extract package names and versions."""
+    packages = []
+    for line in requirements_text.strip().split('\n'):
+        line = line.strip()
+        # Skip comments and empty lines
+        if not line or line.startswith('#') or line.startswith('=='):
+            continue
+        
+        # Extract package name and version
+        if '==' in line:
+            parts = line.split('==')
+            if len(parts) == 2:
+                package_name = parts[0].strip()
+                version = parts[1].strip()
+                packages.append((package_name, version))
+        elif '>=' in line or '<=' in line or '~=' in line:
+            # Handle other version specifiers
+            match = re.match(r'^([a-zA-Z0-9-_.]+)\s*([><=~]+)\s*([\d.]+.*)', line)
+            if match:
+                package_name = match.group(1)
+                operator = match.group(2)
+                version = match.group(3)
+                packages.append((package_name, f"{operator}{version}"))
+    
+    return packages
+
+def check_package_version(package_name: str, version: str) -> Dict[str, any]:
+    """Check if a specific package version exists on PyPI."""
+    try:
+        # Get package info from PyPI
+        response = requests.get(f"https://pypi.org/pypi/{package_name}/json", timeout=10)
+        
+        if response.status_code == 404:
+            return {
+                "exists": False,
+                "error": "Package not found on PyPI",
+                "available_versions": []
+            }
+        
+        if response.status_code != 200:
+            return {
+                "exists": False,
+                "error": f"HTTP {response.status_code}: {response.reason}",
+                "available_versions": []
+            }
+        
+        data = response.json()
+        available_versions = list(data.get("releases", {}).keys())
+        
+        # Check if the specific version exists
+        if version.startswith('=='):
+            version_check = version[2:]
+        else:
+            version_check = version
+            
+        if version_check in available_versions:
+            return {
+                "exists": True,
+                "available_versions": sorted(available_versions, reverse=True)[:10]  # Show latest 10
+            }
+        else:
+            return {
+                "exists": False,
+                "error": f"Version {version_check} not found",
+                "available_versions": sorted(available_versions, reverse=True)[:10]
+            }
+            
+    except requests.exceptions.RequestException as e:
+        return {
+            "exists": False,
+            "error": f"Network error: {str(e)}",
+            "available_versions": []
+        }
+    except json.JSONDecodeError:
+        return {
+            "exists": False,
+            "error": "Invalid response from PyPI",
+            "available_versions": []
+        }
+
+def verify_requirements(requirements_text: str) -> Dict[str, any]:
+    """Verify all packages in requirements text."""
+    packages = parse_requirements(requirements_text)
+    results = {
+        "total": len(packages),
+        "valid": 0,
+        "invalid": 0,
+        "errors": []
+    }
+    
+    print(f"Checking {len(packages)} packages...")
+    print("-" * 70)
+    
+    for package_name, version in packages:
+        result = check_package_version(package_name, version)
+        
+        if result["exists"]:
+            results["valid"] += 1
+            print(f"✅ {package_name}=={version}")
+        else:
+            results["invalid"] += 1
+            error_info = {
+                "package": package_name,
+                "version": version,
+                "error": result["error"],
+                "available_versions": result["available_versions"][:5]  # Show top 5
+            }
+            results["errors"].append(error_info)
+            
+            print(f"❌ {package_name}=={version}")
+            print(f"   Error: {result['error']}")
+            if result["available_versions"]:
+                print(f"   Available versions: {', '.join(result['available_versions'][:5])}")
+            print()
+    
+    return results
+
+def suggest_fixes(errors: List[Dict]) -> None:
+    """Suggest fixes for invalid packages."""
+    if not errors:
+        return
+        
+    print("\n" + "=" * 70)
+    print("SUGGESTED FIXES:")
+    print("=" * 70)
+    
+    for error in errors:
+        package = error["package"]
+        requested_version = error["version"]
+        available = error["available_versions"]
+        
+        print(f"\n{package}=={requested_version}")
+        
+        if available:
+            # Find the closest available version
+            if requested_version.replace('==', '') in [v.split('rc')[0].split('b')[0].split('a')[0] for v in available]:
+                # Pre-release version might exist
+                print(f"  → Try: {package}=={available[0]}")
+            else:
+                # Suggest the latest stable version
+                stable_versions = [v for v in available if not any(x in v for x in ['rc', 'a', 'b', 'dev'])]
+                if stable_versions:
+                    print(f"  → Try: {package}=={stable_versions[0]}")
+                else:
+                    print(f"  → Try: {package}=={available[0]}")
+        else:
+            print(f"  → Package might not exist. Check the package name.")
+
+def main():
+    """Main function to verify requirements file."""
+    if len(sys.argv) > 1:
+        # Read from file
+        filename = sys.argv[1]
+        try:
+            with open(filename, 'r') as f:
+                requirements_text = f.read()
+        except FileNotFoundError:
+            print(f"Error: File '{filename}' not found")
+            sys.exit(1)
+    else:
+        # Read from stdin or use the example
+        print("Paste your requirements.txt content (press Ctrl+D when done):")
+        try:
+            requirements_text = sys.stdin.read()
+        except KeyboardInterrupt:
+            print("\nCancelled")
+            sys.exit(0)
+    
+    results = verify_requirements(requirements_text)
+    
+    print("\n" + "=" * 70)
+    print("SUMMARY:")
+    print("=" * 70)
+    print(f"Total packages: {results['total']}")
+    print(f"Valid packages: {results['valid']} ✅")
+    print(f"Invalid packages: {results['invalid']} ❌")
+    
+    if results["errors"]:
+        suggest_fixes(results["errors"])
+        sys.exit(1)
+    else:
+        print("\nAll packages and versions are valid! 🎉")
+        sys.exit(0)
+
+if __name__ == "__main__":
+    main()