Open-source project

opencode

anomalyco/opencode

The open source coding agent — terminal-first, model-agnostic.

opencode is a blazingly popular terminal coding agent: a language-server-backed TUI that works with any provider, scriptable and hackable. Its growth made it the open counterweight to Claude Code.

View on GitHub Homepage

In the news

CommunityGitHub / Hacker News · Jan 9, 2026

Anthropic blocks third-party use of Claude Code subscriptions

Anthropic began enforcing its terms against third-party clients using Claude Code subscriptions, forcing alternative harnesses like opencode to rework authentication (its issue thread became the debate's ground zero). A defining platform-risk moment for the open-harness ecosystem: the model provider owns the login, the harness does not.

Related projects

superpowers

obra/superpowers

An agentic skills framework and software methodology that works.

superpowers is the most-adopted skills pack in harness engineering: skills, instincts, memory, security and research-first workflows for Claude Code and 13 other harnesses (Codex, Cursor, opencode, Gemini CLI and more). Treats harness engineering itself as the discipline.

≈294kMDXMIT

DeepSeek Harness

deepseek-ai/deepseek-harness

Featured

Everything is a Plugin — DeepSeek's open agent harness.

DeepSeek Harness is the breakout open-source harness of 2026: an architecture where everything — tools, subagents, even the loop itself — is a plugin. A Desktop app for macOS and Windows followed in October 2026, and the project passed 240k stars in under three months.

≈242kTypeScriptMIT

GStack

garrytan/gstack

Garry Tan's Claude Code skill stack.

GStack is Garry Tan's Claude Code skill stack: 23 slash-command modes (CEO/eng/design review, QA, ship, browse, retro…) that structure one assistant as a virtual engineering team. Famously his daily driver while running YC — harness configs as management.

≈134kTypeScriptMIT