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Retrieval-Augmented Generation

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Retrieval-augmented generation (RAG) is a technique that improves large language models by retrieving relevant information from external sources and using it to generate more accurate and context-aware responses.

A RAG system combines information retrieval with a language model. It is commonly used in AI assistants, search systems, document question answering, and applications that need access to private or frequently updated information.

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Recap everything the web says about a topic — keyless multi-backend web search into a citation-checked, tiered Markdown + HTML report, in five modes (topic/bug/research/learn/startup), plus an agentic deep-research tier (decompose, merge, adversarially verify). The web-facing sibling of ultradoc. A skills.sh agent skill.

  • Updated Sep 8, 2026
  • TypeScript

Framework-aware code intelligence MCP server for Claude Code and Codex — 70.5% fewer input tokens to review a pull request, median over 60 merged PRs in repos we don't own, comprehension at parity. 81 languages, 87 frameworks. Your code and index never leave the machine; an anonymous usage ping is on by default and opt-out.

  • Updated Sep 8, 2026
  • TypeScript

Answer ultra-precise questions — and generate grounded, citation-checked reference docs — about any open-source project from its real source code, issues, PRs, docs and the web. Grounded retrieval, not the model's memory. A skills.sh agent skill + zero-dependency CLI.

  • Updated Sep 8, 2026
  • JavaScript

Index a whole repo (code + docs) into a navigable, AI-analyzed encyclopedia — map + per-module entries + typed link-graph — so an AI works in huge codebases without filling its context. One auto-routing skills.sh skill with grounded, citation-checked analysis and optional local (Ollama) semantic search.

  • Updated Sep 8, 2026
  • JavaScript