Reasonix
Terminal-native coding agent built exclusively around DeepSeek's prefix cache to cut long-session token costs to roughly a fifth.
Community:
Product Overview
What is Reasonix?
Reasonix is an open-source coding agent designed to run natively in the terminal and communicate directly with DeepSeek's API. Unlike general-purpose agents that resend a growing prompt at full price each turn, Reasonix structures its conversation history as append-only and byte-identical, letting DeepSeek's prefix cache absorb most of the repeated context. This architectural choice pushes cache hit rates above 90% on long sessions and shrinks input-token billing to about one-fifth of typical costs, making extended, multi-file coding sessions far more affordable to run.
Key Features
Cache-First Architecture
Append-only session history stays byte-identical to maximize DeepSeek's prefix cache, sustaining 90%+ hit rates and cutting input-token costs to roughly one-fifth.
Single Go Binary
A CGO-free binary cross-compiled for macOS, Linux, and Windows on both amd64 and arm64, requiring no Node runtime to install or maintain.
First-Class MCP Support
Connects to external tool servers via stdio, SSE, or streamable HTTP, merging their capabilities into one unified, prefixed tool registry.
Plan Mode and Sandboxing
Write access stays confined to the workspace, and an optional read-only plan mode gates sessions until changes are explicitly approved.
Subagents and Skills
Built-in explore, research, review, and security-review subagents work alongside Markdown-based skill scripts with isolated tool access.
Terminal or Browser UI
Run entirely from the command line, or launch a local browser interface with approvals, goal tracking, todos, and cost balance views.
Use Cases
- Long-Running Codebase Refactors : Developers can keep extended sessions open across large repositories without costs escalating turn after turn.
- Cost-Sensitive AI Coding : Teams relying heavily on DeepSeek can slash API spend on repetitive, context-heavy coding tasks.
- Secure Automated Coding Tasks : Plan mode and workspace sandboxing let users review AI-proposed changes before anything is written to disk.
- Tool-Augmented Development : MCP integration lets developers plug in external servers and custom tools directly into the agent's workflow.
- Remote or Collaborative Sessions : The local web UI with token-based auth allows sharing a running session over a tunnel or remote port.
FAQs
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