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T3 Code is a free, open-source workspace for running coding agents such as Claude Code and Codex through subscriptions users already hold. Its tools include task-specific Git branches, diff review and remote access, while provider billing and plan limits remain in place.
T3 Code, an open-source app from T3 Tools Inc., brings coding agents including Claude Code and Codex into one workspace, letting developers manage tasks and review code without replacing their existing provider subscriptions. The project says the app does not resell AI tokens; users continue to authenticate with and pay their providers directly.
The app places several coding agents in a shared interface with a common thread view, diff panel and Git actions. The project’s homepage names Claude Code, Codex, Google’s Antigravity, OpenCode, Cursor and Grok Build. Its GitHub installation guide listed 10 providers on November 8, adding Kiro, Pi, Muse Code and fx. That list reflects the guide at the time checked and may change as the project develops.
For each task, T3 Code can create a separate Git branch and working folder. Users can inspect the resulting changes, then commit, push and open a pull request from the same interface. The project also says users can switch agents within a thread, which can support workflows where one agent produces a change and another reviews it. These features organize work; they do not establish that one agent’s output is correct or ready to merge.
T3 Code is described as free and licensed under MIT. The project says it uses the agents’ existing harnesses—the software that gives a model access to files and commands—rather than supplying its own model or harness. It is available as desktop software for macOS, Windows and Linux, as well as a web app, command-line server and mobile apps for iOS and Android. According to the project, agents run on a machine chosen by the user, while other devices can connect remotely.
How T3 Code brings agents together One workspace, existing subscriptions
T3 Code organizes coding agents such as Claude Code and Codex in a shared workspace. It does not replace provider subscriptions, billing or plan limits.
One interface for agent work
A shared view can help developers coordinate tasks and inspect changes across agents.
Shared thread and diff
View agent work and code changes together, then switch agents within a thread.
Separate task branches
Use task-specific branches and folders to review, commit, push and open pull requests.
Connect across devices
Agents run on a user-chosen machine; other devices can connect remotely.
What T3 Code provides
The project describes the app as an interface over tools developers already use.
- Free, open-source workspace under MIT
- Shared interface, Git actions and remote access
- Usage view with API-equivalent cost estimates
- Existing accounts and sign-in
- Provider billing and plan limits
- Agent harnesses that access files and commands
Check before a trial
Integrations and behavior may vary as the early project develops.
Confirm your agents are supported, installed and authorized on the machine that will run them.
New threads start in full-access mode unless users change the default.
Inspect the branch and diff, and check provider billing and usage reporting.
One Workflow Across Coding Agents
Developers who pay for multiple coding tools may benefit from having their tasks and changes visible in one place. A shared interface can make it easier to run work in parallel, compare agents and track which branch contains a given change. T3 Code’s remote-access setup may also suit people who want to check work from a browser or phone while the agents run on another computer.
The distinction around billing matters: the app is presented as an organizer, not a substitute subscription. The project says provider limits still apply, and T3 Code adds no token quota of its own. Its usage page combines activity across agents, but its documentation describes cost figures as API-equivalent estimates, not a record of the amount charged under a user’s subscription.
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Many coding products combine a model with a harness that lets it read files and run commands. T3 Code’s FAQ says the app supplies neither: it connects to harnesses users already have installed and provides a shared interface over them. The project’s homepage describes it as an “open-source control plane for coding agents.”
The project was at version 0.1.7, dated November 4, 2026, in the supplied source material. Its GitHub repository showed about 51,990 stars when checked on November 8. The project also claims more than 500,000 developers use it, a figure the source material says could not be independently checked. Those numbers offer a snapshot of project activity, not an independent measure of reliability or adoption.
“the open-source control plane for coding agents”
— T3 Code homepage
Limits, Safety and Adoption
The available source material does not independently verify the project’s developer-use figure or establish how well the app performs across all listed agents. The project is early in its version history, and its provider list and features may change. The documentation says new threads start in full-access mode unless users change the default; users should understand the access setting before running an agent. The material does not specify how the app’s security controls compare across providers or how remote connections are protected.
It is also unclear how consistently provider sign-in, plan limits and usage reporting work across every integration. The project says provider terms and limits continue to apply, and its usage cost figures are estimates rather than subscription invoices. Readers should treat those descriptions as project guidance, not an independent audit.
Check Integrations Before Installing
Users considering T3 Code can check the current installation guide for supported providers and sign-in steps, then confirm that the agents they use are installed and authorized on the machine that will run them. Before starting work, they can review the default access mode and set one that fits the task. The project’s version, provider list and documentation are the immediate details to watch as it develops.
For developers already satisfied with one agent in one terminal, the source material does not identify a necessary reason to switch. For people coordinating several agents, the practical next step is to try a small task, inspect the branch and diff, and verify that provider billing and usage reporting behave as expected.
Key Questions
Does T3 Code include Claude Code or Codex subscriptions?
No. The project says users sign in with their existing provider accounts and continue to pay those providers. T3 Code does not resell tokens.
Which coding agents does it support?
The project homepage names Claude Code, Codex, Antigravity, OpenCode, Cursor and Grok Build. Its GitHub installation guide listed 10 providers on November 8, 2026, including Kiro, Pi, Muse Code and fx. Check the current guide for changes.
Can T3 Code open a pull request?
The project says a task can use its own Git branch and working folder, and users can review changes, commit, push and open a pull request through the interface.
Does its usage page show my exact subscription bill?
No. The project documentation describes cost figures as API-equivalent estimates. Provider subscription billing and plan limits remain separate.
Is T3 Code useful for someone who uses one coding agent?
The source material says the app is most useful for people using multiple agents, running tasks in parallel or working across devices. It does not identify a clear need for someone content with one agent in one terminal.
Source: Thorsten Meyer AI
