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

    Google NotebookLM over MCP + a local HTTP REST API. Citation-backed Q&A, audio/video/content generation, multi-account rotation. For Claude Code, Codex, Cursor, n8n, Zapier, Make.

    TypeScriptLicense: MIT
    • agentic-skill
    • anthropic
    • automation
    • citations
    • claude-code

    githubmeasured growthOpen source ↗

    174GitHub stars+3 (+1.8 %)
  2. 2

    MCP
    Active

    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. 81 languages, 87 frameworks, 100% local.

    TypeScriptLicense: MIT
    • ai-agents
    • claude
    • claude-ai
    • claude-code
    • claude-code-plugin

    githubmeasured growthOpen source ↗

    161GitHub stars+59 (+57.8 %)
  3. 3

    Skill
    Active

    Local-first, auditable Python code agent. Ships its own 30-task hidden-test benchmark plus SWE-bench Verified scored by the official harness -- every number reproducible, negative results included.

    PythonLicense: MIT
    • agent
    • agent-evaluation
    • agent-skills
    • code-agent
    • llm

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/hwfengcs/DM-Code-Agent ~/.claude/skills/DM-Code-Agent

    151GitHub starsstable
  4. 4

    Agent
    Active

    Ruby's capable AI runtime

    RubyLicense: MIT
    • a2a
    • a2a-client
    • agent
    • agent2agent
    • agents

    githubmeasured growthOpen source ↗

    139GitHub stars+1 (+0.72 %)
  5. 5

    MCP
    Active

    Context Engineering: Build Consistent, Accurate, Predictable AI Systems

    PythonLicense: Apache-2.0
    • agent-skills
    • agentic-ai
    • context-engineering
    • generative-ai
    • llm

    githubmeasured growthOpen source ↗

    137GitHub stars+2 (+1.5 %)
  6. 6

    Skill
    Active

    A self-hosted knowledge platform for humans and AI agents — publish wikis, blogs, and portable Agent Skills.

    TypeScriptLicense: Apache-2.0
    • agent-skills
    • ai-agent
    • blog
    • golang
    • knowledge-base

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/Ciao1019/Petrichor ~/.claude/skills/Petrichor

    128GitHub stars+2 (+1.6 %)
  7. 7

    Skill
    Active

    Find out what your coding agents already know. Docmancer indexes the memory, rules, and instructions Claude Code, Codex, Cursor, and Gemini wrote on your machine, then carries the durable parts to every agent. It is local-first and under…

    PythonLicense: MIT
    • agent-memory
    • ai
    • ai-agents
    • ai-memory
    • claude-code

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/docmancer/docmancer ~/.claude/skills/docmancer

    123GitHub starsstable
  8. 8

    Skill
    Active

    Local-first AI knowledge app and Agent Skill with evidence-backed Wiki, an interactive knowledge universe, Viki Q&A, and shareable knowledge galaxies.

    JavaScriptLicense: MIT
    • agent-skills
    • ai-agents
    • ai-assistant
    • claude-code
    • codex

    githubmeasured growthOpen source ↗

    Install git clone https://github.com/NimaChu/my-wiki ~/.claude/skills/my-wiki

    123GitHub starsstable
  9. 9

    MCP
    Active

    Apple Developer Documentation with Semantic Search, RAG, and AI reranking for MCP clients

    TypeScriptLicense: MIT

      mcpmeasured growthOpen source ↗

      Remote server, to be declared in the MCP configuration https://mcp.apple-rag.com

      117GitHub stars+1 (+0.86 %)
    • 10

      Skill
      Active

      AI-agent skill producing reusable Markdown from PDFs. It turns flowcharts, diagrams, and charts into text beside each caption instead of empty links. It checks an earlier conversion against the PDF and fixes misread or missing parts. Long…

      PythonLicense: AGPL-3.0
      • agent-skills
      • ai-agents
      • codex
      • codex-skill
      • document-conversion

      githubmeasured growthOpen source ↗

      Install git clone https://github.com/libnyx/LT2MD ~/.claude/skills/LT2MD

      114GitHub stars+25 (+28.1 %)
    • 11

      MCP
      Active

      Pay-per-use IBM Granite AI via x402: chat, code, embeddings, forecasting. USDC on Base or Solana.

      JavaScriptLicense: Apache-2.0

        mcpmeasured growthOpen source ↗

        Remote server, to be declared in the MCP configuration https://three.ws/api/ibm-mcp

        111GitHub stars+6 (+5.7 %)
      • 12

        MCP
        Active

        x402 pay-per-use IBM Granite AI: chat, code, embeddings, analysis, forecasting. Pay USDC per call.

        ↓ 70 downloads/weekJavaScriptLicense: Apache-2.0

          mcpmeasured growthOpen source ↗

          Install claude mcp add ibm-x402-mcp -- npx @three-ws/ibm-x402-mcp

          111GitHub stars+6 (+5.7 %)
        • 13

          MCP
          Active

          IBM watsonx.ai MCP by three.ws: chat, text generation, embeddings, and tokenization.

          ↓ 73 downloads/weekJavaScriptLicense: Apache-2.0

            mcpmeasured growthOpen source ↗

            Install claude mcp add ibm-watsonx -- npx @three-ws/ibm-watsonx-mcp

            111GitHub stars+6 (+5.7 %)
          • 14

            MCP
            Active

            Alibaba Cloud DashScope MCP: Qwen chat, embeddings, and model discovery on your own account.

            ↓ 84 downloads/weekJavaScriptLicense: Apache-2.0

              mcpmeasured growthOpen source ↗

              Install claude mcp add alibaba-cloud -- npx @three-ws/alibaba-cloud-mcp

              111GitHub stars+6 (+5.7 %)
            • 15

              MCP
              Active

              Self improving agents through iterations

              PythonLicense: Apache-2.0
              • agent-learning
              • agent-memory
              • agentic-workflows
              • ai-agents
              • claude-code

              githubmeasured growthOpen source ↗

              105GitHub starsstable
            • 16

              Skill
              Active

              Andrej Karpathy's LLM Wiki pattern as a skill & Claude Code plugin — turn accumulated sources into a self-maintaining, scalable markdown knowledge base.

              TypeScriptLicense: MIT
              • ai-tools
              • claude-code-plugin
              • claude-code-skill
              • codex-skill
              • cursor

              githubmeasured growthOpen source ↗

              Install /plugin marketplace add praneybehl/llm-wiki-plugin

              100GitHub stars+3 (+3.1 %)
            • 17

              Agent
              Active

              🚀 Way Back Home

              PythonLicense: Apache-2.0
              • a2a
              • adk
              • agents
              • bigquery
              • google-cloud

              githubmeasured growthOpen source ↗

              96GitHub starsstable
            • 18

              Skill
              Active

              Official Findings of EMNLP 2026 implementation of Corpus2Skill: compile a document corpus into a navigable skill hierarchy that LLM agents explore at query time, with document lookup instead of a serving-time vector-search service.

              PythonLicense: MIT
              • agent-skills
              • agentic-rag
              • emnlp-2026
              • enterprise-knowledge
              • enterprise-search

              githubmeasured growthOpen source ↗

              Install git clone https://github.com/dukesun99/Corpus2Skill ~/.claude/skills/Corpus2Skill

              85GitHub stars+2 (+2.4 %)
            • 19

              Skill
              Active

              Harness engineering applied to knowledge production: a self-evolving multi-agent newsroom that turns your documents into a cross-linked markdown wiki. A "reground" loop pulls published pages back in before they go stale — writer ≠ reviewer,…

              PythonLicense: MIT
              • agentic-ai
              • ai-agents
              • claude
              • claude-code
              • claude-skills

              githubmeasured growthOpen source ↗

              Install git clone https://github.com/alfadur7/llm-wiki-newsroom ~/.claude/skills/llm-wiki-newsroom

              82GitHub stars+2 (+2.5 %)
            • 20

              MCP
              Active

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

              RustLicense: MIT

                mcpmeasured growthOpen source ↗

                72GitHub stars+5 (+7.5 %)
              • 21

                MCP
                Active

                AST knowledge graph MCP server for Claude Code — semantic search, call graph traversal, HTTP route tracing, impact analysis. Auto-indexes 10 languages via Tree-sitter.

                RustLicense: MIT
                • ast
                • call-graph
                • claude-code
                • claude-code-plugin
                • code-navigation

                githubmeasured growthOpen source ↗

                72GitHub stars+1 (+1.4 %)
              • 22

                MCP
                Active

                Cross-platform persistent memory MCP for Codex, Gemini CLI, Claude Code, and other local MCP hosts. 36 cited neuroscience mechanisms, local-first SQLite/PostgreSQL, hybrid retrieval, decay-based consolidation, and reproducible benchmarks.…

                PythonLicense: MIT
                • agent-memory-system
                • agent-skills
                • causal-inference
                • claude-code
                • codex

                githubmeasured growthOpen source ↗

                71GitHub starsstable
              • 23

                Skill
                Active

                The official Pinecone marketplace for Claude Code Plugins

                PythonLicense: MIT
                • anthropic-claude
                • claude-code
                • claude-code-plugin
                • claude-code-plugin-marketplace
                • hybrid-search

                githubmeasured growthOpen source ↗

                Install /plugin marketplace add pinecone-io/pinecone-claude-code-plugin

                68GitHub starsstable

              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

                atlas-agent-control-plane

                Skill
                ActiveOpen source ↗

                AtlasAgent - an auditable AI agent control plane: evidence-backed memory, governed tool runtime, checkpoint DAG recovery, and a 55-chapter engineering tutorial. FastAPI / Next.js PWA / Textual TUI

                PythonLicense: MIT
                • agent
                • agent-framework
                • agent-orchestration
                • agent-skills
                • agentic-ai
                github

                Install git clone https://github.com/malevrigns/atlas-agent-control-plane ~/.claude/skills/atlas-agent-control-plane

                Resourcemeasured growth
                110GitHub stars+5 (+4.8 %)
              2. 2

                membrane

                Skill
                ActiveOpen source ↗

                A selective learning and memory substrate for agentic systems — typed, revisable, decayable memory with competence learning and trust-aware retrieval.

                GoLicense: MIT
                • agent
                • agent-framework
                • agent-memory
                • agent-skills
                • agentic
                github

                Install git clone https://github.com/BennettSchwartz/membrane ~/.claude/skills/membrane

                Resourcemeasured growth
                94GitHub starsstable