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Open-source coding agent
★ 36.1k スターApache-2.0
ガイドを見る →OpenCodeは、anomalycoが公開しているオープンソースの開発ツールプロジェクトです（GitHub: anomalyco/opencode）。GitHubスターは211,612、フォークは28,116で、MITライセンスの下で公開されています。GitHubでの最終更新は2026年10月3日です。
The open source coding agent
Editor extensions, terminal commands, or standalone apps — most install in under a minute.
Use a hosted frontier API, or keep everything local with an open model backend.
The tool indexes your codebase so suggestions and edits are project-aware.
Ask for features, let it edit files, run tests, and review diffs before you accept.
Not just autocomplete — plans, edits multiple files, and runs commands.
Indexes your repo so answers respect your actual code, not guesses.
Lives where you work: VS Code, JetBrains, Neovim, or the plain terminal.
Swap between frontier APIs and local models per task.
Every change is a reviewable diff — you stay in control.
Customize prompts, tools, and behavior; no black box.
Download the source and move into the project folder.
git clone https://github.com/anomalyco/opencode.git
cd opencodeUse the package manager the project specifies (check for pnpm or yarn lockfiles).
npm installLaunch the dev server or build, per the README.
npm run devTwo smaller dev tools solve the day-to-day friction around coding agents: Arc Kit is an AI-driven enterprise architecture governance harness spanning strategy, delivery and assurance, and Codmate is a macOS app for browsing, resuming and reviewing your AI coding sessions. The Dev Tools shelf also holds @shadcn/lint — an agent-first linter for Tailwind design systems: you define what is allowed, and errors explain the fix in terms of your components.
It multiplies them — the best results come from developers directing, reviewing, and owning the design.
Cloud frontier models code best today; local models keep everything private and free.
It is an open-source project at anomalyco/opencode with 28,116 forks. Check the repo's contributors and recent commits to see how active maintenance is.
With local models, no. With APIs, check the provider — many offer zero-retention modes.
Coverage varies: VS Code and terminal are universal; check each tool for JetBrains/Neovim.
The tools are open-source; model usage may cost if you use paid APIs.
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