[Knowledge Layer] Version & Compatibility Context

[gloomcheng]

Problem Statement

AI may suggest:

• Deprecated APIs
• Syntax only available in newer versions
• Packages conflicting with existing dependencies

Model knowledge cutoff means it doesn't know latest best practices.

Proposed Solution

Dependency Intelligence

1. Version Awareness

   • Parse package.json, requirements.txt, etc.
   • Know exact versions in use

2. Compatibility Checking

   • Before suggesting APIs, verify version support
   • Flag deprecated methods

3. Conflict Prediction

   • Analyze dependency tree before adding packages
   • Warn about potential conflicts

Success Criteria

• AI knows project's dependency versions
• Warnings for version-incompatible suggestions
• Reduced dependency conflict issues

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🤖 Generated with Claude Code

[gloomcheng]

✅ Issue #5 Completed: Version & Compatibility Context

Successfully implemented dependency version management and compatibility checking system.

What was implemented:

1. DependencyService - Core service for dependency management

   • Parses npm (package.json), Python (requirements.txt), Go (go.mod) dependencies
   • Built-in database of deprecated APIs for React, Express, Node.js
   • Version compatibility checking with conflict detection
   • Smart deprecation detection with file/line reporting

2. DependencyHandler - MCP tool handler

   • 4 new MCP tools: dependency-analyze, dependency-check, dependency-version, dependency-suggest
   • Rich feedback with suggestions and warnings
   • Grouped reporting by severity and environment

3. ImplementationValidator Integration

   • Dependency checking integrated into validation pipeline
   • Priority: Danger zones → Environment → Dependencies → Mocks → Unused
   • Critical deprecations (APIs that will be removed) flagged as blockers

Key Features:

• Multi-package manager support (npm, pip, go)
• Deprecated API detection with regex patterns
• Version conflict detection
• Proactive warnings before code completion
• Detailed suggestions for replacements

Validation Priority System:

1. 🚨 Danger Zones (highest - user protection)
2. ⚠️ Environment Compatibility (runtime constraints)
3. 📦 Dependency Issues (deprecated APIs)
4. 🔍 Mock/Scaffold Detection
5. 🧹 Unused Code

This completes the third Knowledge Layer feature, giving AI full awareness of:

• Protected code regions (Issue [Knowledge Layer] Danger Zone Marking - Protected Code Regions #3) ✅
• Environment-specific constraints (Issue [Knowledge Layer] Environment Context - Runtime Constraints Awareness #4) ✅
• Dependency versions and deprecated APIs (Issue [Knowledge Layer] Version & Compatibility Context #5) ✅

Committed in: 25276a9