Coplay

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June 2025

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June 18, 2025 - Version 4.0.0

New Features:

• AI image generation -You can now ask Coplay to create images for you. Super useful for prototyping!Updates:

Improvements:

• The @ shortcut for context additions gives you feedback more quickly
• We’ve improved how Coplay looks when you use Unity’s light theme
• What if you work with UI toolkit? You’ll be happy to know that this release improves how Coplay generates UI with that system

Updates:

• The “One Shot UI Generation” mode is gone
  • Normal and Agent mode do a pretty good job of creating and editing UIs, we recommend you use them for your UI needs going forward
• We changed the first step of using Coplay. You’ll see a screen to download dependencies. Downloading is a one-time thing, so you won’t be kept back from game development for long!

Bug Fixes:

• Other bug fixes and improvements that allow us to resolve errors more easily
• Screenshots on MacOS no longer crash

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June 12, 2025 - Version 3.2.4

Bug Fix: Bug fix for an edge case where coplay gets stuck on some approved function executions

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June 11, 2025 - Version 3.2.3

Improvements:

• State stability improvement to prevent hanging states
• Improved error handling for too much context

Bug Fixes:

• Bug fix for cancelling thinking
• Fixed a function related to adding assets to scenes

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June 11, 2025 - Version 3.2.2

Improvements:

• Updated the Gemini models to the latest (06-05)
• Improved UI (especially for light mode)
• Better error handling for script execution
• Improved recording playback and action-recording details

Bug Fixes:

• Fixes some login bugs
• Fixes a bug with coplay state hanging after certain functions
• Fix for message scrolling in Unity 2021

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June 8, 2025 - Version 3.2.1

Bug Fix: fix some intermittent errors with code generation

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June 5, 2025 - Version 3.2.0

New Feature: Added account creation with username/password

Improvements:

• Improved 3d generation
• Render markdown responses in chat
• See previews of the screenshots that Coplay took
• Screenshots are more reliable on macOS
• Improved batch execution in Experimental mode

Bug Fixes:

• Fixes for rendering code blocks
• Bug fix when setting properties
• Other stability fixes and improvements

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May 2025

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May 29, 2025 - Version 3.1.0

• New Feature: We added a snapping tool! Sometimes you want things to be place in a grid, or in relation to another object. Just ask Coplay to snap it for you!
• Bug Fixes:
  • Fixed a bug when setting values for a Vector 3 property
  • Fixed the positioning issue when parenting an object to another
• Improvement: Minor UI improvements

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May 28, 2025 - Version 3.0.0

• New Features:
  • Chat history! You can now go back to old threads/chats similar to how you can in Cline or Cursor.
  • New Pipeline Recording mode. This replaces the record-and-replay feature we had before with a dedicated mode that makes it easier for you to see what’s recorded and to edit the pipelines.
• Improvement: Improved MCP host UX. Theres a button in the settings menu for you to add any MCP server to use from within Coplay,
• Bug Fixes:
  • Fix a bug with editing files that would hang Coplay in some cases
  • Fix a bug with the visual feedback feature — it now can properly see UI changes
  • Fix a bug for unity 2021
  • A few UI and stability improvements

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May 24, 2025 - Version 2.0.0

• New Feature: MCP host! You can connect with other MCP servers right in Coplay. It’s not yet easy to use, so we’ll be releasing an update soon with a much better experience
• Improvements
  • List files ignores things you don’t care about like the .git folder and other hidden files
  • Better context management - say goodbye to errors in long chats, just keep chatting away
• Bug Fix: Fixed the read file bug with OpenAI

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May 23, 2025 - Version 1.8.2

• New Model: Added Claude 4 model with Thinking mode

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May 20, 2025 - Version 1.8.1

• New Model: Added Claude 3.7 model with Thinking mode
• Bug Fix: Fix for feedback UI on Linux

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May 20, 2025 - Version 1.8.0

• New Feature: Added functionality to help optimize your scenes when asked
• Improvements:
  • Improved token counting accuracy
  • Improved script execution
  • Made property assignment more robust and capable
  • Improve breadth of context the model can extract while at the same time reducing tokens spent on context
• Bug Fix: Fixed a bug where claude models would sometimes hit context limits and break coplay,

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May 16, 2025 - Version 1.7.0

• Improvement: Added a new, “experimental”, mode! What’s the experiment? We wanted to make bulk actions easier to do, try it out and give us some feedback!,
• Bug Fix: Fix a bug when removing copy/pasted images from context

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May 13, 2025 - Version 1.6.2

• Improvement: Improved actions possible for the Agent mode — it should now be even smarter with finding context.
• Bug Fix: Fix a bug with UI-generation mode.

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May 10, 2025 - Version 1.6.1

• Bug Fix: Small patch to remove some logging and make Coplay more performant

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May 9, 2025 - Version 1.6.0

• New Model: New Mercury diffusion model added. It’s much faster at executing sequential functions, but still experimental and small context.
• New Feature: Bring-your-own-key: you can now enter your own anthropic key for cases where the global Claude rate limits we hit might slow you down. In the future, this will also double as the free tier for you to use Coplay with. I.e. you can provide your own key and continue to use Coplay for free
• Improvements:
  • Max Requests: At the moment this is hard coded to 20. We’ve seen some cases where coplay runs without stopping overnight. This is a temporary stopgap to ensure AI doesn’t take over the world
  • Improved Visual Understanding (Experimental): Update to push the model to visually check it’s changes. (Warning, we’ve seen some cases where it causes the model to iterate for longer — don’t be afraid to stop the model early and give it new feedback/instructions)

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May 7, 2025 - Version 1.5.1

• New Model: Added new Gemini Pro model 05-06, potentially better than Claude 3.7
• Improvement: Enhanced UI for function results
• Bug Fix: Fixed an issue with 3D generation in auto-execute mode

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May 6, 2025 - Version 1.5.0

• New Feature: Added ability to set Rules for Coplay to follow

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May 5, 2025 - Version 1.4.2

• Improvement: Coplay can now run in the background without forcing Unity into focus
• Bug Fix: Fixed the never-ending actions that sometimes happens with Gemini
• Bug Fix: Fixed a bug that forces some users to re-login frequently

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May 2, 2025 - Version 1.4.1

• New Feature: Enabled user feedback on AI outputs
• Bug Fix: Fixed a bug with getting object details in prefabs
• Bug Fix: Fixed a bug with logs in streaming outputs

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May 1, 2025 - Version 1.4.0

• Improvement: Better support for copy pasting images directly into chat for making UI from design files/images
• Bug Fix: Fixed a bug with getting object details sometimes exceeding context length

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April 2025

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April 30, 2025 - Version 1.3.4

• Improvement: Code blocks are now also streamed for faster feedback
• Bug Fix: Fixed a backend bug that prevents continuing a thread after some errors

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April 29, 2025 - Version 1.3.3

• Improvement: UI improvements
• Improvement: Faster AI task completions

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April 28, 2025 - Version 1.3.2

• Bug Fix: Fixed issue for search across your project
• Bug Fix: Fixed bug for Operating Systems in non-English-speaking countries

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April 28, 2025 - Version 1.3.1

• Bug Fix: Fixed the issue of Claude 3.7 being selected, but not being used

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April 25, 2025 - Version 1.3.0

• Improvement: Enhanced Agent mode
• New Model: Added Gemini Flash 2.5 — the best fast model
• Bug Fix: Fixed crashing bugs on specific Unity versions
• Bug Fix: Fixed the super-long context issue with Claude 3.7 and other models

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April 23, 2025 - Version 1.2.0

• New Feature: Added ability to provide feedback to functions
• Improvement: Overall stability improvements
• Improvement: Enhanced initial model context
• Improvement: Improved context retrieval functions for better AI accuracy
• Improvement: Better handling of compilation errors with automatic fixes
• Improvement: Faster synchronization for large projects
• New Models: Added support for o3 and o4-mini models

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April 19, 2025 - Version 1.1.2

• Bug Fix: Fixed a search bug on Windows machines

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April 18, 2025 - Version 1.1.1

• Improvement: Improved stability
• Bug Fix: Fixed script generation issues on Windows
• Bug Fix: Fixed bugs in agent file search and object search
• Bug Fix: Fixed a user authentication issue

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April 16, 2025 - Version 1.1.0

• Improvement: Major updates to Normal mode (now the recommended default)
• Improvement: Enhanced file editing for faster and more accurate results
• Improvement: Improved context (faster and more detailed, 36x faster on large projects)
• UI Change: Replaced “delete chat” button with a “New Task” button
• New Model: Added GPT4.1 support

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April 10, 2025 - Version 1.0.2

• Improvement: Improved context retrieval in agent mode
• UI: UI improvements
• Bug Fix: Fixed an edge-case bug with Claude 3.7
• Bug Fix: Fixed support for Unity 2021

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April 7, 2025 - Version 1.0.1

• Improvement: Made Gemini work more consistently
• UI Change: Renamed Beast mode to Normal mode

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April 4, 2025 - Version 1.0.0

• New Feature: Added support for ECS
• Improvement: Major progress with Unity information retrieval and actions
• Improvement: First semantic versioning release
• UI Change: Removed Normal mode, Beast mode is now the default
• UI Change: Claude 3.7 now default for Agent mode
• UI Change: Approval required for dangerous actions like deleting files

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April 1, 2025 - Version 0.0.21

• Improvement: Increased text limit for long messages
• Bug Fix: Agent mode will no longer be stuck after completion
• Bug Fix: Fixed network errors causing premature logouts

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March 2025

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March 31, 2025 - Version 0.0.20

• New Feature: Added support for creating complex games with single prompts
• Improvement: Enhanced Agent mode
• New Model: Added support for Gemini 2.5

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March 27, 2025 - Version 0.0.19

• New Feature: Added response streaming in real-time
• New Mode: Added MCP/Agent mode
• Improvement: Shorter wait times for responses
• Bug Fix: Fixes for Unity 2022, better update notification, more relevant scene context

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March 13, 2025 - Version 0.0.18

• New Feature: Create Unity UIs from uploaded images
• New Feature: Added tab-complete prediction for scene hierarchy changes
• Improvement: Autocomplete feature for scene changes
• UI Change: Updated Coplay’s interface for better visual experience

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March 5, 2025 - Version 0.0.16

• New Feature: Added support for multiple LLMs (OpenAI, Claude, Gemini, Grok)
• New Feature: Scene changes are now highlighted in the scene view
• New Feature: Added user system
• New Mode: Added experimental Beast Mode for automatic tool selection
• Bug Fix: Fixed issues with deleting files, setting tags, GameObject operations within prefabs, and context syncing

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February 25, 2025 - Version 0.0.15

• Bug Fix: Fixed issue with adding prefabs via the + button

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February 24, 2025 - Version 0.0.14

• Bug Fix: Various bug fixes for different Unity versions

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February 24, 2025 - Version 0.0.13

• New Feature: Created special representation of Unity scenes for better change tracking
• New Feature: Added ability to update UIs created by the UI generator
• Improvement: Better handling of huge scenes
• Improvement: Enhanced project sync for better AI decisions
• Improvement: Faster startup times and message responses
• Improvement: Revamped one-shot mode for custom Unity Editor tool generation

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February 15, 2025 - Version 0.0.12

• New Feature: Create UIs using your own art
• New Feature: Enhanced scene generation
• New Feature: Smart scene generation when using your assets (binary FBX support)
• New Feature: Added message queue for multi-command handling
• Improvement: Automatic prefab context addition when viewing
• Improvement: Added automatic timeouts for long-running tasks
• Bug Fix: Fixed issue where 3D models appeared very small in generated 3D scenes
• Bug Fix: Fixed several major bugs

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February 5, 2025 - Version 0.0.11

• Improvement: More consistent canvas selection when creating UIs

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February 5, 2025 - Version 0.0.10

• Bug Fix: Fixed bug that caused crashes in Unity 2021

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February 5, 2025 - Version 0.0.9

• New Feature: Set fonts and images to Unity UI elements
• Improvement: Stability improvements during long-term use
• Improvement: UI creation is now a dedicated mode with faster performance
• Bug Fix: Fixed startup error that appeared in logs

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January 2025

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January 31, 2025 - Version 0.0.8

• New Feature: Early iteration of the new UI generator
• New Feature: Control the quality/depth of the scene generator
• New Feature: Support for creating terrains
• Bug Fix: Eliminated “loops” when canceling actions

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January 24, 2025 - Version 0.0.7

• New Feature: Configure events with Coplay (e.g., OnClick events for buttons)
• Improvement: Better support for copying assets within projects (scenes, 3D models)
• Improvement: Internal state management enhancements for error prevention and recovery
• Bug Fix: Fixed setting properties of game objects within prefabs

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