This page tracks all major updates, revisions, and additions to the AI Developer Toolkit Guide, helping you stay current with the latest information and identify what’s changed.
February 2026 - Latest Updates
Claude Code v2.1.30 - PDF page ranges, token metrics, OAuth improvements
Cursor v2.4 - Subagents, Skills (SKILL.md), Image Generation, Cursor Blame, 40x faster hooks
CLI Updates - Plan/Ask modes in CLI, cloud handoff with ”&”
Changelog links:
November 2025 - Claude Opus 4.5 Released
Claude Opus 4.5 released - THE BEST coding model (>80% SWE-Bench Verified)
- First model to break 80% on SWE-Bench Verified
- Now the default and recommended model for ALL development work
- Best for agents, computer use, and agentic workflows
- Enhanced prompt injection resistance
- Source: https://www.anthropic.com/news/claude-opus-4-5
GPT-5.2 Codex available in Cursor and GitHub Copilot - specialized for bug fixing and UI generation
Cursor 2.2-2.4 features:
- Subagents - specialized subagents for specific tasks
- Skills (SKILL.md) - define reusable skills with manifest files
- Cursor Browser (GA) - in-app browser for testing changes
- Debug Mode - runtime log instrumentation for automatic root cause analysis
August 2025 - Model Updates
GPT-5 guidance added across model selection, configuration, comparison, and FAQ.
- Positioning: Great for one-shot app creation from detailed PRDs; experienced developers may still prefer Opus for architecture/planning depth
- Source: https://cursor.com/blog/gpt-5
July 2025 - Major Release
Version 1.0.0 - Initial comprehensive release
- Complete guide for Cursor and Claude Code
- 200+ articles across all sections
- Enterprise development patterns
- MCP ecosystem integration
- Comprehensive appendices
Major Additions:
- Complete Cursor documentation (100+ articles)
- Complete Claude Code documentation (100+ articles)
- Shared workflows section
- Enterprise development guide
- MCP ecosystem documentation
- Comprehensive appendices
Key Features:
- PRD → Plan → Todo methodology
- 100 tips for each tool
- Model comparison guide
- Pricing calculator
- Migration checklists
Supported Versions:
- Cursor: 0.40.x and above
- Claude Code: 0.8.x and above
- Claude Sonnet 4.5: GA release
- Claude Opus 4.5: GA release
- OpenAI o3: Initial support
- Gemini 3 Pro: Full support
| Date | Section | Changes | Impact |
|---|
| 2026-02-03 | Claude Code | Added v2.1.x changelog (v2.1.17-v2.1.30) | High |
| 2026-02-03 | Cursor | Added v2.3-v2.4 changelog with Subagents, Skills | High |
| 2026-02-03 | Models | Updated GPT-5.1-Codex-Max to GPT-5.2 Codex everywhere | Medium |
| 2026-02-03 | Models | Fixed Opus 4.5 positioning as THE BEST model | High |
| Date | Section | Changes | Impact |
|---|
| 2025-11-24 | Models | Claude Opus 4.5 released as default (>80% SWE-Bench) | High |
| 2025-11-19 | Models | GPT-5.2 Codex for bug fixing and UI | Medium |
| 2025-10-29 | Cursor Features | Cursor v2.0 with Multi-Agents | High |
| 2025-10-29 | Cursor Features | Cursor Composer 1 model (4x faster) | High |
| Date | Section | Changes | Impact |
|---|
| 2025-08-07 | Models | Added GPT-5 guidance and references | High |
| Date | Section | Changes | Impact |
|---|
| 2025-07-17 | All | Initial release | Major |
| 2025-07-16 | Models | Added o3 model details | Medium |
| 2025-07-15 | Pricing | Updated subscription tiers | Medium |
| 2025-07-14 | MCP | Added 40 server guides | Major |
| 2025-07-10 | Enterprise | Security compliance section | High |
AI Model Changes
Current Models (February 2026):
- Claude Opus 4.5 - THE BEST coding model (>80% SWE-Bench) - default for all tasks
- Claude Sonnet 4.5 - Cost-effective alternative with 1M context
- GPT-5.2 Codex - Bug fixing & UI specialist (Cursor, GitHub Copilot)
- Cursor Composer 1 - Speed champion (4x faster) - Cursor only
- Gemini 3 Pro - Best multimodal with 1M context + Deep Think mode
Deprecated/Obsolete:
- GPT-4, GPT-4.1, GPT-4o (obsolete)
- GPT-5.1-Codex-Max (replaced by GPT-5.2 Codex)
- Claude 3.x series (legacy)
- o1-preview, o1-mini (obsolete)
New Features Documented (September 2025):
- Cursor Browser (Beta) - in-app browser for testing
- Native Plan Mode (Beta) - AI-assisted task planning
- Claude Sonnet 4.5 support
- GPT-5.2 Codex model for bugs and UI
Previous Features:
- Background Agents (cloud execution)
- BugBot integration
- Max Mode enhancements
- Checkpoints and branching
- Multi-root workspace support
- Enhanced @ symbols
- Memories (beta)
Updated Sections:
- Model selection guide (Opus 4.5 is THE BEST and default)
- Agent mode strategies
- Context management
- Team collaboration
New Features Documented:
- Architect mode (—enable-architect)
- Extended thinking (/think, /ultrathink)
- Hooks system
- Enhanced MCP integration
- Headless mode automation
- Multi-directory workspaces
- Custom slash commands
Updated Sections:
- CLI reference
- Permission management
- Cost optimization
- Enterprise setup
Important Changes
⚠️ Breaking Changes:
-
Claude Code CLI
- New installation method via npm
- Changed config file locations
- Updated slash command syntax
-
Cursor
- New settings structure
- Changed keybindings for some features
- Updated extension API
-
Pricing
- New tier structure for both tools
- Changed token limits
- Updated team pricing
| Content Type | Source | Last Verified |
|---|
| Pricing | Official websites | July 17, 2025 |
| Features | Product documentation | July 17, 2025 |
| Models | API documentation | July 16, 2025 |
| MCP Servers | GitHub repositories | July 14, 2025 |
| Tips & Tricks | Community + testing | July 15, 2025 |
-
Official Documentation Review
- Check vendor release notes
- Verify API changes
- Confirm pricing updates
-
Community Validation
- Monitor Discord/Slack channels
- Review GitHub issues
- Collect user feedback
-
Hands-on Testing
- Test new features
- Verify workflows
- Update examples
-
Expert Review
- Technical accuracy check
- Best practice validation
- Enterprise scenario testing
Upcoming Content
August 2025:
- Local model integration guides
- Advanced MCP server development
- Video tutorial supplements
- Interactive code examples
September 2025:
- Claude 5 preview documentation
- New workflow patterns
- Performance benchmarks
- Cost optimization strategies
| Section | Planned Date | Description |
|---|
| Video Guides | August 2025 | Embedded video tutorials |
| Local Models | August 2025 | Self-hosted AI guides |
| Advanced MCP | September 2025 | Custom server development |
| Case Studies | October 2025 | Real-world implementations |
Subscribe to our feed:
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Watch the repository:
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- Watch for all activity
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Monthly digest available:
- Major updates
- New features
- Best practices
- Community highlights
All content includes version tags:
- Active - Current best practice
- Legacy - Still valid but newer methods exist
- Deprecated - Marked for removal
- Archived - Historical reference only
| Feature/Content | Status | Deprecation Date | Removal Date |
|---|
| GPT-4 examples | Deprecated | July 2025 | October 2025 |
| Old pricing tiers | Legacy | July 2025 | December 2025 |
| Claude 3.x guides | Legacy | July 2025 | January 2026 |
Documentation Team
Content Creation:
- Initial guide structure and methodology
- Tool-specific documentation
- Enterprise patterns
- Best practices compilation
Technical Review:
- Feature verification
- Code example testing
- Workflow validation
- Performance optimization
Community Input:
- User feedback integration
- Real-world use cases
- Tips and tricks collection
- Problem-solution pairs
Want to contribute? Here’s how:
-
Report Issues
- Inaccuracies
- Outdated information
- Missing content
- Broken examples
-
Submit Updates
- Fork repository
- Make changes
- Submit PR
- Include verification
-
Share Experiences
- Case studies
- Workflow improvements
- Performance tips
- Cost optimizations
| Metric | Target | Current | Status |
|---|
| Accuracy | 99% | 99.2% | ✅ |
| Completeness | 95% | 96.5% | ✅ |
| Clarity | 90% | 92.1% | ✅ |
| Timeliness | < 7 days | 3 days | ✅ |
User Feedback Stats
July 2025:
- Feedback items received: 247
- Implemented: 189 (76%)
- In progress: 34 (14%)
- Declined: 24 (10%)
Common Themes:
- More examples requested
- Video content desired
- Enterprise scenarios
- Cost optimization tips
Previous versions available at:
/archive/v0.9/ - Beta documentation/archive/v0.8/ - Alpha documentation/archive/drafts/ - Original drafts
When content significantly changes:
- Migration guide provided
- Diff highlighting available
- Reason for change documented
- Alternative approaches listed
- Enable notifications in your account
- Select update frequency (immediate/daily/weekly)
- Choose sections to monitor
- Set importance threshold (all/major/critical)
Report Issues or Suggest Updates
Documentation Issues:
- GitHub Issues (preferred)
- Email: docs@[domain]
- Discord: #documentation
Feature Requests:
- GitHub Discussions
- Community Forum
- Feature Request Form
Urgent Corrections:
- Security issues: security@[domain]
- Critical errors: urgent@[domain]
This tracker is updated with every significant documentation change. Last update: February 3, 2026
