Your coding agents,
together in one thread.
Threadlines is an open-source ADE (agentic development environment) for Claude Code, Codex, OpenCode, and more. Add another model to a thread, let agents start their own threads, and keep pull requests, the browser, and Git changes beside the chat.
Free and open source · Use the accounts you already have · Runs locally
AntigravityAgents start threads
Split a big job across threads
An agent can hand parts of a job to new threads, each on the model it picks, and carry on as their answers come back. By default it asks you first, and the new threads sit under it in the sidebar.
Across your projects
Know which thread needs you next
See working threads, open pull requests, and active terminals in one inbox. Keep finished work in Wrapped, and open the activity panel to follow tasks and subagents.
Code review and pull requests
Follow the work through review
Review a GitHub pull request beside its thread, check CI above the composer, and send feedback back to the agent. Open file diffs and Git history without losing the conversation.
Built-in browser
Bring the page into your thread
Open your site inside Threadlines, search the page, and attach a screenshot to your next message.
Files and context
Show the agent the lines you mean
Browse and edit project files, then attach selected code, terminal output, or a note on a reply to your next message.
Every agent you use
Pick your agents, then switch any time
Choose your agents during setup. Every thread's model picker has a tab for each one, and a thread can change agents without losing the conversation or your changes.
Daily work
Pick up where you left off
Resume a thread
Reopen the app and continue with the conversation and work history in place.
Try another direction
Fork a conversation to explore another approach with its context.
Separate the work
Give a thread its own Git worktree so agents can work in separate checkouts.
Free and open source
Your projects, on your machine
Threadlines runs locally with your own agent accounts. The app is MIT-licensed, with its source and full history on GitHub. It began as a fork of T3 Code.
macOS · Windows · Linux