sglang

Cache shared KV prompts with radix-tree based RadixAttention for LLM serving.

Updated Apr 14, 2026
One-click install
npx skills add https://github.com/dotruru/claudemd --skill sglang-dotruru
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: sglang
Source: https://github.com/dotruru/claudemd/tree/main/skills/sglang
Command: npx skills add https://github.com/dotruru/claudemd --skill sglang-dotruru

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

LLM serving often recomputes shared prefixes for every request, leading to wasted compute and higher latency. SGLang solves this by caching and reusing common prefixes with RadixAttention, enabling fast structured generation at production scale.

Core Features & Use Cases

  • Automatic RadixAttention prefix caching to speed up agent workflows, few-shot prompting, and multi-turn conversations.
  • Structured generation support for JSON, regex, and grammar-based outputs, plus constrained decoding.
  • OpenAPI-compatible API and production-ready deployment with multi-GPU and autoscaling support for large-scale inference.

Quick Start

Install the SGLang package and launch the server with a model path and port to begin serving.

Frequently Asked Questions about sglang

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I speed up LLM serving for multi-turn conversations and agent workflows?

Speed up LLM serving by using RadixAttention to automatically cache and reuse shared prompt prefixes like system prompts and tool definitions. This avoids recomputing identical context across multiple requests, drastically reducing latency and wasted compute.

Can I enforce structured JSON output and constrained decoding when serving LLMs?

Yes, you can enforce structured JSON output, regex patterns, and grammar-based constraints during LLM serving. The system applies constrained decoding to guarantee generated text strictly adheres to your specified output format.

What is RadixAttention prefix caching and when do I need it for inference?

RadixAttention prefix caching is a technique that stores computed KV prompts in a radix tree to reuse shared text prefixes. You need it for few-shot prompting or multi-turn agent workflows to eliminate redundant token processing and accelerate response generation.

How do I deploy an OpenAI-compatible API for large-scale LLM inference?

Deploy an OpenAI-compatible API by launching the server with your model path and designated port. This provides production-ready inference with multi-GPU support and autoscaling capabilities to handle large-scale structured generation workloads.

Does prefix caching work with tool calls and few-shot prompts?

Yes, prefix caching works seamlessly with tool calls and few-shot prompts. The automatic radix-tree based caching identifies and stores reused system prompts and tool definitions, accelerating inference for complex agentic workflows.

Why does my LLM server recompute shared system prompts for every new request?

Standard LLM serving recomputes shared prefixes because it lacks automatic prefix caching. Implementing RadixAttention stores these common KV prompts in a radix tree, allowing subsequent requests to reuse the computed context instantly.