RelayKit – Chat relay between AI coding assistants
One-click forwarding of chat history between Claude, Codex, and Cursor, eliminating manual copy-paste
- Problem
- Developers using multiple AI coding assistants (Claude, Codex, Cursor) often need to copy the output from one and paste it into another to continue the conversation. One developer built a Mac app to act as a 'copy-paster' between these tools, highlighting a common pain: it's repetitive, breaks flow, and risks losing context.
- Solution
- A lightweight local app or CLI that monitors the interfaces or APIs of AI coding assistants. When the user triggers a relay command, it extracts the latest conversation history and injects it into the target assistant. Supports custom rules, sensitive data filtering, and preserves code block formatting.
- Users
- Programmers and indie developers who use multiple AI coding assistants for complex development tasks.
- MVP
- Extract conversation history from clipboard or designated windows; provide a global hotkey to trigger relay; include paste templates for common assistants (Claude, Codex, Cursor); allow users to configure content removal or substitution; runs locally, no cloud needed.
- Revenue
- Free basic version; premium (auto window monitoring, multi-device sync, team-shared configs) for $5-10/month or one-time $29.
- Why now
- AI coding assistants are proliferating, and developers commonly use several at once, yet interoperability is lacking. An indie developer can quickly build a focused single-machine relay tool without complex backends.