What interfaces does Reasonix support?

It supports CLI/TUI, desktop app, local browser UI, and ACP-compatible editors, all using the same local engine.

How do I install Reasonix?

You can install it with the command: npm i -g reasonix.

Reasonix

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A DeepSeek-native coding agent for your terminal, browser, and ACP-compatible editor.

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What is Reasonix?

Reasonix is an open-source AI coding agent designed for the terminal, browser, and ACP-compatible editors, engineered around DeepSeek. It uses an append-only loop aligned with DeepSeek's byte-stable prefix cache, achieving 90%+ cache hit on long sessions and reducing input-token costs to about 1/5. The same engine powers the CLI/TUI, desktop app, local browser UI, and ACP-compatible editors. Reasonix is MIT-licensed and developed in public with 97 contributors.

What can Reasonix do?

Cache-first loop
Append-only history aligned to DeepSeek's prefix cache; 90%+ hit on long sessions; input tokens bill at ~1/5.
Single Go binary
CGO-free, cross-compiled for darwin/linux/windows × amd64/arm64; no Node runtime needed.
MCP first-class
Supports stdio, SSE, streamable HTTP; external servers merge tools into one registry under a prefix.
Plan mode & sandbox
/plan asks model to plan first; permissions and workspace sandbox govern every tool call.
Subagents & skills
Includes explore/research/review/security-review agents and Markdown skill scripts with isolated tools.
Terminal, browser, or editor
Full-screen TUI, local browser UI via 'reasonix serve', VS Code extension, or ACP-compatible editors.

Who is Reasonix for?

Developers: Run long terminal coding sessions on a DeepSeek-native agent whose append-only, cache-aligned loop holds 90%+ cache hits and cuts input-token cost to about a fifth.
Terminal users: Install a single CGO-free Go binary across macOS, Linux and Windows with no Node runtime to set up.
AI coding users: Merge external MCP servers' tools into one registry and use plan mode with a workspace sandbox to govern each tool call.
Editor-based developers: Work from a full-screen TUI, a local browser UI, the VS Code extension or any ACP-compatible editor.