by steventsvik
Ghostty for macOS, rebuilt to watch AI coding agents work live. Claude Code, Codex and more in a vertical sidebar, a code editor that types in their edits as they happen, a live code map, a backend view (Cloudflare, Supabase, Vercel), Visual Fix, agent races and change review.
# Add to your Claude Code skills
git clone https://github.com/steventsvik/TellurionSee how Tellurion compares with popular alternatives.
Tellurion is an open-source ai agents skill for AI coding assistants such as Claude Code, Codex CLI, and ChatGPT, built by steventsvik. Ghostty for macOS, rebuilt to watch AI coding agents work live. Claude Code, Codex and more in a vertical sidebar, a code editor that types in their edits as they happen, a live code map, a backend view (Cloudflare, Supabase, Vercel), Visual Fix, agent races and change review. It has 100 GitHub stars.
Tellurion's catalog security scan is still queued. You can run an instant dependency and prompt-injection check now with the "Scan for vulnerabilities" button above.
Clone the repository with "git clone https://github.com/steventsvik/Tellurion" and add it to your Claude Code skills directory (see the Installation section above).
Tellurion is primarily written in Zig. It is open-source under steventsvik on GitHub, so you can review or fork the full source.
Yes. SkillsLLM lists many other AI Agents skills you can browse and compare side by side. Open the AI Agents category from the badge at the top of this page, or use the Related Skills and comparison links further down to weigh Tellurion against similar tools.
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Unlocks once the catalog security scan passes (runs nightly).
⚠️ Third-Party Software Notice
This skill is third-party open-source software developed and hosted independently on GitHub. SkillsLLM is an informational directory and does not control or maintain the underlying repository.
Any security checks, ratings, or warnings displayed by SkillsLLM are automated and limited in scope. They do not constitute a security certification or guarantee that the software is safe, error-free, or free from malicious code, vulnerabilities, compromised dependencies, or prompt-injection risks.
Review the source code, permissions, dependencies, and configuration before installing or running any third-party skill. Use is at your own risk. To the maximum extent permitted by applicable law, SkillsLLM is not liable for losses arising from third-party software.
The deep catalog scan for this skill is still queued. Run an instant dependency check now instead.
Tellurion is a macOS terminal for developers who run several AI coding agents, like Claude Code, Codex, Gemini CLI and Copilot CLI, across several projects at once. It's a fork of Ghostty, the fast native terminal, that shows what every agent is doing, live: the code it's writing as it writes it, where it is in your project, what part of your backend it touches, and when it needs you. Agents share what they learn about each project, hand work to each other, and leave their changes in a review inbox you can undo from.
Everything Ghostty does still works, and your Ghostty config works as-is. This fork tracks official Ghostty releases and adds its features on top.
Tellurion was called GhosttyEXTREME. Same app, same features; if you have GhosttyEXTREME installed, Check for Updates… brings you to Tellurion.
[!NOTE] Unofficial fork. Not affiliated with or endorsed by the Ghostty project.
curl -fsSL https://raw.githubusercontent.com/steventsvik/Tellurion/custom/install.sh | bash
Apple silicon, macOS 13 or newer. Free and open source (AGPL-3.0). No account, no telemetry.
Run Claude Code, Codex, Gemini CLI, Copilot CLI or another agent in a tab, the way you already do. Tellurion follows each one as it works.
| As the agent… | …you see |
|---|---|
| starts a task | Its card in the sidebar shows the task, a working spinner and a timer, and the corners of its terminal breathe. A snapshot of your project is saved, so the turn can be undone. |
| reads a file | The editor opens that file at the lines it read, and the file lights up cyan on the code map. |
| edits a file | The change types itself into the editor with the lines highlighted, the file turns orange on the map, and the turn's diff count goes up. |
| thinks or replies | The agent panel shows its thinking, messages and every tool call as a timeline, sub-agents included. |
| touches your backend | The Worker, database or bucket that code belongs to lights up in the Backend view. |
| starts a dev server | The server moves into its own tab and keeps running after the agent is done. |
| needs you | Its card turns amber with Allow and Deny buttons and jumps to the top of the command palette and Mission Control. You get a notification you can answer from, and a Dock badge. |
| finishes | Its changes land in Review with the full diff. Not what you wanted? Undo last turn puts your files back. |
Nine agents report live status: Claude Code and Codex, plus GitHub Copilot CLI, Droid, Gemini CLI, Antigravity (agy), Kiro CLI, Cursor CLI and OpenCode. The welcome window connects Claude Code and Codex in one click, and Check Setup offers Connect for each of the others it finds on your Mac. Each hook only observes: it never approves, blocks or changes anything, and any settings file it touches is backed up first (symlinked dotfiles stay symlinks). Copilot, Droid, Gemini and OpenCode also report permission prompts; Kiro, Antigravity and Cursor show Working and Done.
Amp, Goose, Hermes, Aider, Crush, Qwen Code, Kimi and Mistral Vibe are recognized by name and logo when you start them.
A vertical sidebar (⌃⌘S) lists every tab with its folder, git branch and uncommitted changes. Tabs can be pinned, colored and renamed, and hovering one shows a card with more detail.