Documentation Update Tracker

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.

Latest Updates

June 2026 - Latest Updates

Claude Fable 5 (June 9) - New tier above Opus 4.8 (Mythos-class, made safe for general use); claude-fable-5, $10/$50 per MTok, 1M context, 128K output; Claude Code v2.1.170+ (/model fable) and Cursor’s model picker; included on Pro/Max/Team/seat-based Enterprise plans through June 22, 2026

Claude Code v2.1.156–170 - ultracode is now the dynamic-workflow trigger keyword (renamed from workflow, v2.1.160); fallbackModel (up to three) + --fallback-model in interactive sessions; glob patterns in deny rules; plugins in .claude/skills auto-load + claude plugin init; auto mode on Bedrock/Vertex/Foundry for Opus 4.7/4.8; --safe-mode + /cd (v2.1.169); Claude Fable 5 access (v2.1.170)

Cursor 3.6–3.7 - Canvas Design Mode and Design Mode in the browser (multi-select, voice); Cursor SDK custom tools, auto-review, JSONL/custom stores, nested subagents; Auto-review Run Mode; Organizations for Cursor Enterprise

Codex CLI v0.136–0.137 - /archive sessions (codex archive/unarchive); OSC 8 clickable links; codex remote-control controller pairing via app-server v2; codex plugin list --json; parallel standalone web search

New official skills publishers - OpenAI (openai/skills), Google Gemini, LangChain, Vercel, Prisma, Convex, Deepgram, Box, Contentful, Contentstack, and Base now publish official agent skills on skills.sh

May 2026 - Latest Updates

Claude Opus 4.8 (May 28) - New flagship, ~4× fewer unflagged code flaws; dynamic workflows + ultracode (research preview, v2.1.154+); /workflows; fast mode 2×/2.5×; lean system prompt default

Claude Code v2.1.144–154 - /resume for background sessions, claude agents --json, /simplify → /code-review with effort levels and --fix

Cursor 3.3–3.5 + Composer 2.5 - PR review, Build in Parallel, full-screen tabs, Composer 2.5 ($0.50/$2.50; fast $3/$15), Jira integration, shared canvases, Automations in the Agents Window

Codex CLI v0.131–0.135 - codex doctor, goals on by default, history search, --profile standardization, codex remote-control foreground; GPT-5.5 is the default model

April 2026 - Latest Updates

Cursor 3.0 - Agents Window, Design Mode, Agent Tabs, /worktree, /best-of-n, enterprise features

Claude Code v2.1.84–92 - PowerShell tool (Windows), Bedrock setup wizard, /powerup command, per-model cost breakdown, conditional hooks

Codex App & CLI - Thread search, theming, revamped automations (local/worktree), first-class plugins, sub-agents

Changelog links:

• Cursor: https://cursor.com/changelog
• Claude Code: https://github.com/anthropics/claude-code/releases

March 2026 - Major Model and Platform Updates

GPT-5.4 released - First general-purpose model with native computer-use, 1M context, default across all Codex/ChatGPT surfaces

Cursor Composer 2 - Frontier coding model (MoE on Kimi K2.5), $0.50/$2.50 per 1M tokens

Codex Security - Application security agent in research preview, 1.2M commits scanned, 792 critical findings

Cursor Automations - Always-on agents with event triggers (Slack, Linear, GitHub, PagerDuty)

Cursor Self-Hosted Cloud Agents - Enterprise: code stays in customer infrastructure

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

Version History

Version 1.0.0 (July 17, 2025)

New Content

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

Tool Versions

Supported Versions:

• Cursor: 0.40.x and above
• Claude Code: 0.8.x and above
• Claude Sonnet 4: GA release
• Claude Opus 4: GA release
• OpenAI o3: Initial support
• Gemini 2.5 Pro: Full support

Content Update Log

June 2026 Updates

Date	Section	Changes	Impact
2026-06-10	Models	Added Claude Fable 5 across model guides, pricing and routing	High
2026-06-10	Claude Code	Added v2.1.169–170 (--safe-mode, /cd, Claude Fable 5)	High
2026-06-08	Claude Code	Added v2.1.156–168 (ultracode trigger keyword, fallback models, .claude/skills auto-load, cloud auto mode)	High
2026-06-08	Cursor	Added 3.6–3.7 (Canvas Design Mode, Cursor SDK, Auto-review Run Mode, Enterprise Organizations)	High
2026-06-08	Codex	Confirmed changelog current at v0.137 (controller pairing, parallel web search)	Low
2026-06-08	Skills	Added 11 new official publishers (OpenAI, Google, LangChain, Vercel, Prisma, Convex, Deepgram, Box, Contentful, Contentstack, Base)	Medium

May 2026 Updates

Date	Section	Changes	Impact
2026-05-28	Claude Code	Added Opus 4.8, dynamic workflows + ultracode, v2.1.144–154 changelog	High
2026-05-28	Models	Updated defaults to Opus 4.8 / GPT-5.5 / Composer 2.5; refreshed pricing	High
2026-05-28	Cursor	Added Cursor 3.4–3.5 and Composer 2.5 changelog entries	High
2026-05-28	Codex	Added CLI v0.131–0.135 (codex doctor, goals default, history search)	Medium

April 2026 Updates

Date	Section	Changes	Impact
2026-04-05	Cursor	Added Cursor 3.0 (Agents Window, Design Mode, Agent Tabs)	High
2026-04-05	Claude Code	Added v2.1.84–v2.1.92 (PowerShell, Bedrock wizard, /powerup)	High
2026-04-05	Codex	Added Codex App/CLI updates (thread search, theming, automations)	Medium
2026-04-05	Models	Documented GPT-5.4 as the Codex default in IDE/Cloud surfaces	Medium

March 2026 Updates

Date	Section	Changes	Impact
2026-03-18	Models	GPT-5.4 released as default for Codex/ChatGPT (1M context, computer-use)	High
2026-03-18	Cursor	Added Composer 2 (replacing Composer 1), Automations, Self-Hosted Cloud Agents, Marketplace Plugins	High
2026-03-12	Codex	Added Codex Security research preview, Windows app, CLI 0.117-0.118	High
2026-03-12	Claude Code	Added v2.1.81–v2.1.86 (—bare, transcript search, managed-settings)	Medium

February 2026 Updates

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

November 2025 Updates

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

August 2025 Updates

Date	Section	Changes	Impact
2025-08-07	Models	Added GPT-5 guidance and references	High

July 2025 Updates

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

Model Updates

AI Model Changes

Current Models (June 2026):

• Claude Fable 5 - Top tier, $10/$50 per 1M, 1M context
• Claude Opus 4.8 - Opus-tier flagship; Claude Code default
• Claude Opus 4.7 - Prior flagship, still available for teams pinned to it
• Claude Sonnet 4.6 - Cost-effective alternative with 1M context
• Claude Haiku 4.5 - Cheap, fast tier for subagents and bulk work ($1/$5 per 1M)
• GPT-5.5 - Default across Codex/ChatGPT, 1M context ($5/$30 per 1M)
• Cursor Composer 2.5 - Frontier coding model, MoE architecture ($0.50/$2.50 per 1M)
• Gemini 3.1 Pro - Best multimodal with 1M context + Deep Think mode

Deprecated/Obsolete:

• GPT-4, GPT-4.1, GPT-4o (obsolete)
• GPT-5.1 / 5.2 and GPT-5.1-Codex-Mini/Max (removed from the Codex picker)
• GPT-5.3-Codex and GPT-5.4 (superseded by GPT-5.5)
• Cursor Composer 1 and Composer 2 (replaced by Composer 2.5)
• Claude Opus 4.6 and earlier (superseded by Opus 4.8; Opus 4.7 remains available as the prior flagship)
• Claude 3.x series (legacy); o1-preview, o1-mini (obsolete)

Feature Updates

Note

This section is a historical snapshot of what each tool’s docs covered as of late 2025. For the current model defaults, see the Current Models card above (Claude Opus 4.8 is now the default flagship; GPT-5.5 powers Codex).

Cursor

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 (as of September 2025):

• Model selection guide (Opus 4.5 was the recommended default at the time; Opus 4.8 is current)
• Agent mode strategies
• Context management
• Team collaboration

Claude Code

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

Breaking Changes

July 2025

Important Changes

Breaking Changes:

1. Claude Code CLI

   • New installation method via npm
   • Changed config file locations
   • Updated slash command syntax

2. Cursor

   • New settings structure
   • Changed keybindings for some features
   • Updated extension API

3. Pricing

   • New tier structure for both tools
   • Changed token limits
   • Updated team pricing

Content Accuracy

Information Sources

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

Verification Process

1. Official Documentation Review

   • Check vendor release notes
   • Verify API changes
   • Confirm pricing updates

2. Community Validation

   • Monitor Discord/Slack channels
   • Review GitHub issues
   • Collect user feedback

3. Hands-on Testing

   • Test new features
   • Verify workflows
   • Update examples

4. Expert Review

   • Technical accuracy check
   • Best practice validation
   • Enterprise scenario testing

Planned Updates

Q3 2025 Roadmap

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

Future Sections

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

Change Notification

How to Stay Updated

RSS/Atom

Subscribe to our feed:

• RSS: /en/feed.xml
• Atom: /en/atom.xml
• JSON: /en/feed.json

GitHub

Watch the repository:

• Star for updates
• Watch for all activity
• Subscribe to releases

Newsletter

Monthly digest available:

• Major updates
• New features
• Best practices
• Community highlights

Version Tags

All content includes version tags:

---
version: 1.0.0
last_updated: 2025-07-17
tools:
  cursor: ">=0.40.0"
  claude_code: ">=0.8.0"
---

Deprecation Policy

Content Lifecycle

1. Active - Current best practice
2. Legacy - Still valid but newer methods exist
3. Deprecated - Marked for removal
4. Archived - Historical reference only

Deprecation Timeline

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

Contribution Tracking

Major Contributors

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

Contribution Guidelines

Want to contribute? Here’s how:

1. Report Issues

   • Inaccuracies
   • Outdated information
   • Missing content
   • Broken examples

2. Submit Updates

   • Fork repository
   • Make changes
   • Submit PR
   • Include verification

3. Share Experiences

   • Case studies
   • Workflow improvements
   • Performance tips
   • Cost optimizations

Quality Metrics

Content Quality Tracking

Metric	Target	Current	Status
Accuracy	99%	99.2%	Met
Completeness	95%	96.5%	Met
Clarity	90%	92.1%	Met
Timeliness	< 7 days	3 days	Met

Feedback Integration

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

Archive Access

Historical Versions

Previous versions available at:

• /archive/v0.9/ - Beta documentation
• /archive/v0.8/ - Alpha documentation
• /archive/drafts/ - Original drafts

Migration Guides

When content significantly changes:

• Migration guide provided
• Diff highlighting available
• Reason for change documented
• Alternative approaches listed

Update Notification Setup

1. Enable notifications in your account
2. Select update frequency (immediate/daily/weekly)
3. Choose sections to monitor
4. Set importance threshold (all/major/critical)

Contact for Updates

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]

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This tracker is updated with every significant documentation change. Last update: June 10, 2026