Termic

Termic

Termic is a free, open-source (AGPL-3.0) desktop app that runs vendor AI CLIs (claude, codex, gemini, grok, antigravity, etc.) in real PTYs, organized into tasks and git worktrees for developer workflows, with sandboxing, project-aware tools, and built-in editor/diff views.

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Free
#60 in Developer Tools (60 tools)
Just launched
Data reviewed Jul 27, 2026

Quick Overview

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What it does

Developer Tools software for decision-makers comparing workflow fit and alternatives.

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Pricing snapshot

Free from Free (AGPL-3.0)

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Termic

Termic is a native desktop app (macOS and Linux builds) that spawns vendor AI CLIs in real PTYs and organizes interactions into tasks backed by git worktrees. It intentionally runs the same CLI binaries you already have (claude, codex, gemini, grok, antigravity, etc.), inheriting their auth and using the vendor's interactive CLI path rather than SDK wrappers or a proxy. Termic is free and open source under AGPL-3.0 and focuses on developer workflows: tabbed agents, built-in editor and diff views against HEAD, Run/Setup streaming of dev servers, project-aware search and a committed .termic.yaml to reproduce task setup across teammates.

Beyond workflow features, Termic offers optional sandboxing (macOS Seatbelt filesystem restrictions and an in-process CONNECT proxy with a hostname allowlist) to limit agent access to the network and filesystem, plus tools for comparing multiple agents in parallel, queuing follow-ups, and reviewing agent changes like code review. The app is implemented with a Tauri + Rust backend and a WKWebView frontend and ships installers (dmg, AppImage) and a brew cask for easy install.

Open-source Conductor.build alternative. Run claude, codex, antigravity and more in parallel git worktrees, on the Claude Pro / Max plan you already pay for.

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Key Features

Run real vendor CLIs in PTYs

Termic spawns the actual CLI binaries (claude, codex, gemini, grok, antigravity, copilot, opencode, etc.) in PTYs so you get vendor features the day they ship and inherit your existing auth and subscription behavior.

Built-in and custom PTY agents

Several agents ship built-in and you can add your own PTY-based agents (examples: aider, ollama run) in about 30 seconds.

Tasks & git worktrees

Create tasks backed by either the main checkout or a separate git worktree. Worktrees create branched copies on disk for feature work while the main checkout mode attaches agents to the real checkout for quick edits.

Tabbed agents, editor and diff view

Tabbed agents with a built-in editor and a diff view against HEAD. Agents can produce diffs and accept precise inline feedback, enabling a code-review-like workflow.

Search and project-aware tooling

Fuzzy Cmd+P file search backed by git ls-files, project-wide git grep (Cmd+Shift+F), and .termic.yaml committed to the repo to reproduce task setup for teammates.

Broadcast and multi-agent comparison

Send one message to multiple agents in a task to compare responses across vendors (e.g., claude, gemini, codex) before committing to an approach.

Sandboxing and network allowlist

Optional per-task macOS Seatbelt filesystem restrictions and an in-process Rust CONNECT proxy with a hostname allowlist (anthropic, google, openai, GitHub, npm, PyPI, crates.io and more can be allowed).

Queue follow-ups & reusable prompts

Queue multiple follow-up messages to send automatically when an agent finishes, and save a library of reusable prompts that can be run against agents or stored in the repo.

Spotlight mirroring

Mirror a task into your main checkout so your real dev server, watchers and tests run against the agent's changes without moving your branch ref (uses detached HEAD to avoid writing commits to the branch).

Native desktop stack & small bundle

Built with Tauri 2 (Rust backend) and WKWebView frontend, React 19 + Vite 8 UI, CodeMirror 6 editor and xterm.js + WebGL terminal for a compact ~10MB bundle on macOS.

Pricing

Free Tier Available

Termic is free and open source under the AGPL-3.0 license. Vendor CLIs run on your existing plan and any charges for model usage remain with the vendor.

Free / Open Source

Free (AGPL-3.0)
  • Full Termic app and source under AGPL-3.0
  • MacOS and Linux builds available

Use Cases

Local AI-assisted code edits and reviews

Attach an agent to your current checkout or worktree, have it propose diffs, review its changes inline like a pull request, and send batched comments back into the agent for iterative fixes.

Compare answers across multiple vendor agents

Broadcast the same prompt to claude, gemini, codex, etc., and compare outputs side-by-side before choosing an implementation path.

Safe experimentation with agents

Use per-task sandboxing to prevent agents from accessing secrets or arbitrary network endpoints while letting them run CLI toolchains and dev servers in a controlled environment.

Multi-repo or end-to-end development

Create multi-repo tasks that span api/, web/ and infra/ directories so a single agent can operate across multiple repositories using a shared CLAUDE.md describing layout and structure.

Daily driver for CLI-centric development

Use Termic as a daily shell for your existing CLIs with terminals, launch commands, project search, queued messaging and an integrated run panel that streams your dev server.

Integrations

Anthropic (claude)

Runs the interactive claude CLI binary in a PTY and inherits local auth and subscription behavior.

OpenAI / Codex

Supports running codex via the real CLI binary in a PTY.

Google (gemini)

Supports running gemini via vendor CLI binaries in PTYs.

Grok, Antigravity, Copilot, Opencode and others

Several vendor CLIs ship built-in; you can add any tool that runs in a PTY as a custom agent.

Package registries & GitHub (sandbox allowlist)

The default network allowlist includes vendor APIs plus GitHub, npm, PyPI and crates.io for repository and package registry access when allowed.

Benefits

Runs vendor CLIs directly so you get new CLI features the day they ship and inherit vendor auth and quotas.
Open source AGPL-3.0 licensing ensures the project and derivatives remain auditable and prevents proprietary forks.
Project-aware search and .termic.yaml reduce setup friction and reproduce task configuration across teammates.
Optional sandboxing and in-process network proxy limit agent access to sensitive files and external endpoints.
Compact native app stack (Tauri + WKWebView) with smaller bundle size than typical Electron apps.

Limitations

Sandboxing (macOS Seatbelt filesystem restrictions) is macOS-only; Linux equivalent is planned and Windows support is pending.
Termic itself is free, but model usage and API charges are still billed by the vendor: CLIs run on your existing plan.
Sandbox mode is pinned at task creation and cannot be toggled for a live task.

Frequently Asked Questions

Does this work with my Claude Pro / Max subscription?
Yes. Termic spawns the interactive claude CLI—the same binary you'd run locally—so it uses the same auth and subscription quota. The page notes that Anthropic's SDK credit change applies to the SDK path and claude -p, while the interactive claude CLI Termic uses stays on the regular Pro/Max subscription usage limits.
How is this different from Conductor.build?
The page explains differences in source (AGPL-3.0), platform support (macOS and Linux builds), agent breadth (supports multiple vendor CLIs and custom PTY agents), process boundaries, and sandboxing features like macOS Seatbelt and network allowlist. It includes a comparison link for more detail.
Does Termic see my prompts or read my code?
No. Termic is a local app with no backend. Prompts flow xterm → PTY → CLI → vendor. Termic does not read or forward prompts elsewhere; a local debug log exists in your temp dir and the project is open source for auditing.
Can agents touch my secrets or hit random APIs?
Not if you enable the sandbox. Filesystem access is default-deny via macOS Seatbelt and the network is gated by an in-process CONNECT proxy with a per-CLI hostname allowlist. The sandbox is pinned at task creation and cannot be toggled for a live task.
Is it actually open source?
Yes—Termic is licensed AGPL-3.0 and the source is available on GitHub; the site encourages forking, auditing, building and shipping derivatives under the same license.
Are Linux and Windows supported?
macOS and Linux are supported now; Linux x86_64 ships as a signed AppImage per release. The sandbox is currently macOS-only; the Linux equivalent (bubblewrap/landlock) is planned next and Windows support is planned after that.

Getting Started

  1. 1 Install Termic: use the brew cask (brew install --cask simion/termic/termic) or download the macOS .dmg or Linux AppImage from Releases.
  2. 2 Ensure you have the vendor CLI binaries you want to use (claude, codex, gemini, etc.) installed and authenticated locally; Termic spawns your existing binaries and inherits auth.
  3. 3 Open Termic and create a task using either the main checkout or create a worktree for feature branches; optionally commit a .termic.yaml to the repo to capture setup.
  4. 4 Use tabbed agents, the built-in editor/diff, and Run/Setup panel to iterate; enable sandboxing on task creation if you need filesystem/network restrictions.

Support

Docs

Documentation available from the termic.dev Docs link.

Blog / Changelog

Project updates and changelog available from the blog and changelog links on the site.

GitHub (issues & releases)

Source, releases, issues and the project repository are on GitHub (link available on the site).

Sponsorship

Sponsorship information is provided on the site for supporting the developer.

API

Available: No

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