RAG and search: tools for developers

Retrieval-augmented tools, vector databases, embeddings and semantic search. An entry can appear under several use cases when its topics or description provide several explicit signals.

Use case

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120 entries in this view.

Tool ranking

Ranked by known GitHub stars, highest first; archived repositories come after maintained repositories. Raw values keep their source-specific window, shown under each tool; a change requires at least two snapshots from the last 7 days.

  1. 1

    MCP
    Active

    Persistent memory for Claude Code & Codex CLI. Auto-extracted knowledge graph, multi-representation embeddings, 3D WebGL visualization. LongMemEval R@5=97.45%. Self-hosted, Ollama-optional

    PythonLicense: MIT
    • ai-memory
    • ai-tools
    • anthropic
    • chromadb
    • claude-code

    githubmeasured growthOpen source ↗

    67GitHub stars+1 (+1.5 %)
  2. 2

    MCP
    Active

    Local-first MCP memory server: SQLite, FTS5 and vector search, AES-256-GCM. 55 tools, no cloud.

    RustLicense: MIT

      mcpmeasured growthOpen source ↗

      67GitHub starsstable
    • 3

      MCP
      Active

      Token-efficient code review knowledge graph: semantic search and call-graph resolution.

      PythonLicense: Apache-2.0

        mcpmeasured growthOpen source ↗

        Install claude mcp add better-code-review-graph -- uvx better-code-review-graph

        66GitHub starsstable
      • 4

        MCP
        Active

        RuvNet Brain — a downloadable, source-grounded brain for Claude Code over Reuven Cohen's (rUv's) RuvNet stack: RuVector/RVF, Ruflo, AgentDB, RuLake, SPARC + 21 building blocks. Grounds Claude in real source via one MCP tool (search_ruvnet),…

        JavaScript
        • agentdb
        • ai-agents
        • anthropic-claude
        • claude-code
        • claude-code-plugin

        githubmeasured growthOpen source ↗

        65GitHub stars+1 (+1.6 %)
      • 5

        Skill
        Active

        Agent skills for LandingAI's Agentic Document Extraction (ADE) — production-ready document AI for agentic coding assistants

        License: MIT
        • ade
        • agent-skills
        • claude
        • document-extraction
        • document-processing

        githubmeasured growthOpen source ↗

        Install git clone https://github.com/landing-ai/ade-document-processing-skills ~/.claude/skills/ade-document-processing-skills

        64GitHub starsstable
      • 6

        MCP
        Active

        Semantic search and pattern discovery for Obsidian and markdown vaults.

        TypeScript

          mcpmeasured growthOpen source ↗

          59GitHub starsstable
        • 7

          Agent
          Active

          专利侵权分析系统 —— 输入专利公开号，产出竞品侵权分析报告；同时打包成 skill，可被任意 agent（dsh, codex, claudecode 等） 调用。

          Python
          • agentic-ai
          • claim-chart
          • claude-code
          • claude-code-skill
          • codex

          githubmeasured growthOpen source ↗

          59GitHub stars+2 (+3.5 %)
        • 8

          Other
          Active

          A memory-first AI agent that remembers why decisions were made — not just the last message. Runs local (Ollama), cloud (Claude · OpenAI · Gemini), or decentralized TEE. Graph memory, self-learning skills, multi-model routing, sandboxed…

          RustLicense: MIT
          • a2a
          • acp
          • ai-agent
          • claude
          • cli

          githubmeasured growthOpen source ↗

          58GitHub stars+1 (+1.8 %)
        • 9

          MCP
          Active

          Local-first AI PKM for coding conversations: import Claude Code/Cursor/Codex, distill notes, semantic search, tag graph, MCP memory.

          TypeScriptLicense: Apache-2.0
          • agent-skills
          • ai-memory
          • ai-tools
          • claude-code
          • codex

          githubmeasured growthOpen source ↗

          58GitHub stars+3 (+5.5 %)
        • 10

          MCP
          Active

          Persistent long-term memory for Claude Code via MCP — captures coding decisions, bugfixes, and context across sessions. Hybrid FTS5 + TF-IDF search with episode batching. Single SQLite DB, no external services. Alternative to claude-mem…

          JavaScriptLicense: MIT
          • agent-memory
          • ai-coding-assistant
          • ai-memory
          • anthropic
          • claude

          githubmeasured growthOpen source ↗

          57GitHub stars+3 (+5.6 %)
        • 11

          MCP
          Active

          Local semantic search over Obsidian vaults via Smart Connections embeddings. Multi-vault, private.

          TypeScriptLicense: MIT

            mcpmeasured growthOpen source ↗

            Install claude mcp add smart-connections-mcp -- npx smart-connections-mcp

            54GitHub starsstable
          • 12

            Library
            UnknownLast commit: unavailable

            Typescript bindings for langchain

            • llm
            • ai
            • gpt3
            • chain
            • prompt

            npmmeasured growthOpen source ↗

            Install npm install langchain

            1 918 070downloads over 7 days-677 690 (-26.1 %)
          • 13

            Library
            UnknownLast commit: unavailable

            Interface between LLMs and your data

            • LLM
            • NLP
            • RAG
            • data
            • devtools

            pypimeasured growthOpen source ↗

            Install pip install llama-index

            781 161downloads over 7 days-206 854 (-20.9 %)
          • 14

            Library
            UnknownLast commit: unavailable

            Embeddings, Retrieval, and Reranking

            • Transformer Networks
            • BERT
            • XLNet
            • sentence embedding
            • PyTorch

            pypimeasured growthOpen source ↗

            Install pip install sentence-transformers

            5 340 106downloads over 7 days-795 607 (-13.0 %)

          Learning resources

          Ranked by known GitHub stars, highest first; archived repositories come after maintained repositories. These resources remain available separately and do not take part in the main tool ranking.

          1. 1

            ai-agent-architecture

            Other
            ActiveOpen source ↗

            Build LLM systems you actually control. A free, open engineering book + course — from tokenization to serving your own models. Mechanisms, trade-offs, and numbers, not prompt tips

            HTML
            • a2a-protocol
            • ai
            • ai-agents
            • context-engineering
            • distributed-systems
            githubResourcemeasured growth
            46GitHub starsstable
          2. 2

            Agentic_AI_Engineer

            Agent
            ActiveOpen source ↗

            My complete journey to becoming an Agentic AI Engineer through structured learning, projects, experiments, and production-ready implementations of modern AI systems.

            Jupyter NotebookLicense: MIT
            • a2a-protocol
            • agent-orchestration
            • ai-guardrails
            • fastapi
            • kubernetes
            githubResourcemeasured growth
            18GitHub starsstable
          3. 3

            lit-review-agent-tools

            MCP
            ActiveOpen source ↗

            🤖 The strongest curated list of open-source AI-agent tools for literature review — 70+ tools across 11 categories (Claude Code skills, deep research, MCP servers, PDF parsing, systematic review). 面向智能体文献综述的最强工具大全。

            PythonLicense: CC0-1.0
            • academic-research
            • ai-agents
            • awesome
            • awesome-list
            • claude-code
            githubResourcemeasured growth
            16GitHub stars+3 (+23.1 %)
          4. 4

            awesome-agentic-ai

            MCP
            ActiveOpen source ↗

            Curated Agentic AI resources: AI agent frameworks, tutorials, courses, projects, MCP tools, research papers, evaluation, security, and production guides.

            License: CC0-1.0
            • a2a
            • agent-framework
            • agentic-ai
            • ai-agents
            • ai-engineering
            githubResourcemeasured growth
            2GitHub starsstable
          5. 5

            ai-resources

            Other
            ActiveOpen source ↗

            Comprehensive collection of AI concepts, research findings, and practical implementations. From machine learning fundamentals to cutting-edge LLMs, agents, and emerging technologies.

            PythonLicense: MIT
            • a2a
            • ai
            • azureopenai
            • mcp
            • openai
            githubResourcemeasured growth
            1GitHub starsstable
          6. 6

            Agentic-AI-Project-Find-Deal-Opportunities

            Other
            ActiveOpen source ↗

            Detect underpriced products by scraping deals and using AI models to estimate fair prices for profit opportunity identification.

            Jupyter Notebook
            • a
            • a2a
            • activemq
            • amqp
            • awesome
            githubResourcemeasured growth
            1GitHub starsstable