Top 23 llm-tool Open-Source Projects

1. Agent-Reach

   1 6 78,615 9.5 Python

   Give your AI agent eyes to see the entire internet. Read & search Twitter, Reddit, YouTube, GitHub, Bilibili, XiaoHongShu — one CLI, zero API fees.

   

   Project mention: ถ้าต้องล้าง Hermes แล้วเริ่มใหม่, ชุด 19 Skills ที่ควรติดตั้งก่อนอื่น | dev.to | 2026-09-07

   [2] Panniantong/Agent-Reach, GitHub (2026), https://github.com/Panniantong/Agent-Reach

2. AppSignal

   www.appsignal.com sponsored

   AppSignal knows why the f*#k it crashed. Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.

   

3. firecrawl-mcp-server

   2 1 7,444 9.3 JavaScript

   🔥 Official Firecrawl MCP Server - Adds powerful web scraping and search to Cursor, Claude and any other LLM clients.

   

   Project mention: Show HN: MCP-recorder – VCR.py for MCP servers. Record, replay, verify | news.ycombinator.com | 2026-03-06

   --target https://mcp.devhelm.io

   It works with both HTTP and stdio transports. Scenarios are defined in YAML so it works with MCP servers in any language, and there's a pytest plugin if you want tighter integration. Secret redaction and environment variable interpolation are built in.

   To make sure this actually works on real codebases, I submitted several PRs to production MCP servers: monday.com's MCP server (https://github.com/mondaycom/mcp/pull/222), Tavily's MCP server (https://github.com/tavily-ai/tavily-mcp/pull/113), and Firecrawl's MCP server (https://github.com/firecrawl/firecrawl-mcp-server/pull/175). They went from zero schema coverage to full tool surface verification with a clean schema diff available on each tool change. One big benefit is that you can do verification and replay with no API keys — deterministic responses, no live requests to real servers.

   I wrote up a deeper dive into the schema drift problem and the VCR pattern for MCP here: https://devhelm.io/blog/regression-testing-mcp-servers

4. OmniRoute

   3 3 4,001 - TypeScript

   Never stop coding. Free AI gateway: one endpoint, 160+ providers, RTK+Caveman stacked compression up to ~95% eligible context savings, smart auto-fallback, MCP/A2A, multimodal APIs, Desktop/PWA.

   

   Project mention: Test OmniRoute Fallbacks for Semantic Consistency, Not Just Availability | dev.to | 2026-07-21

   diegosouzapw/OmniRoute is an MIT-licensed AI gateway that advertises one endpoint across many providers and models, with quota-aware fallback and token compression.

5. tdd-guard

   4 9 2,335 9.5 TypeScript

   Automated TDD enforcement for Claude Code

   

   Project mention: EvanFlow – A TDD driven feedback loop for Claude Code | news.ycombinator.com | 2026-04-26

   If you’re just looking for the TDD part - https://github.com/nizos/tdd-guard - is the only project I’ve come across that actually enforces it with hooks and blocks edits rather than relying on a prompt that gets context rotted away.

6. claw-compactor

   5 2 2,024 8.5 Python

   14-stage Fusion Pipeline for LLM token compression — reversible compression, AST-aware code analysis, intelligent content routing. Zero LLM inference cost. MIT licensed.

   

   Project mention: I Cut My LLM API Bill in Half with a Single Python Library | dev.to | 2026-03-18

   git clone https://github.com/open-compress/claw-compactor.git cd claw-compactor python3 scripts/mem_compress.py /your/workspace benchmark

7. betterleaks

   6 4 1,920 9.5 Go

   Find leaked secrets everywhere.

   

   Project mention: Ask HN: What Are You Working On? (May 2026) | news.ycombinator.com | 2026-05-10

   I've been working on Betterleaks for the past three months. It's the successor to Gitleaks since I'm not focused on that project much anymore. I just released v1.2.0 which added GitHub as a source to scan for secrets against and a new filtering system powered by CEL for more expressiveness.

   https://betterleaks.com

8. llm-space

   7 1 1,870 9.8 TypeScript

   A desktop app to prototype agent ideas, inspect every harness step, replay failures, and evaluate performance, all in one place. Local-first, cloud-ready for managed agents.

   

   Project mention: You Don't Need a Better Agent. You Need a Better Debug Loop. | dev.to | 2026-07-18

   llm-space on GitHub

9. Kargo

   akuity.io sponsored

   Stop Scripting Promotions. Start Shipping with Kargo. Kargo automates promotion across dev, staging, and prod with approval gates and verification. Open source, built by the team behind Argo CD. Download now.

   

10. opc-skills

    8 1 1,808 9.5 Python

    Agent Skills for Solopreneurs

    

    Project mention: Show HN: OPC Skills – 9 AI agent skills for solopreneurs (Claude Code, Cursor) | news.ycombinator.com | 2026-01-23

11. ghost-os

    9 1 1,654 9.0 Swift

    Full computer-use for AI agents. Self-learning workflows. Native macOS. No screenshots required.

    

    Project mention: Show HN: Ghost OS – Let AI agents use your Mac, not just the terminal | news.ycombinator.com | 2026-02-19

12. PrismerCloud

    10 2 1,559 9.9 TypeScript

    Prismer Cloud

    

    Project mention: Show HN: Agent harness that turns errors into shared genes | news.ycombinator.com | 2026-04-21

13. mirascope

    11 7 1,525 9.8 Python

    The LLM Anti-Framework

    

    Project mention: Show HN: Mirascope – The LLM Anti-Framework | news.ycombinator.com | 2026-01-26

14. pm-claude-skills

    12 1 1,357 9.8 HTML

    1098 professional Agent Skills for Claude, ChatGPT, Gemini, Cursor & Codex — from PRDs and postmortems to appealing a disability benefit, building a go-bag, and settling into a new country. Plain-markdown, MIT, in Anthropic's official plugin directory. Free in-browser or 'npx pm-claude-skills add'.

    

    Project mention: Open-source AI skills that make Claude/ChatGPT produce real work, eval-scored | news.ycombinator.com | 2026-06-19

15. linkedin-skills

    13 2 1,239 8.3 Python

    Claude skills for LinkedIn. 11 Claude Code and Codex skills that write human-sounding LinkedIn posts, craft comments that get noticed, analyze your feed, and build a publishing cadence, all from your terminal. Content engineering by Creative Content Crafts. MIT.

    

    Project mention: Show HN: I processed 100k+ LinkedIn posts into open-source Claude Code skills | news.ycombinator.com | 2026-09-03

16. Agentlas-OS

    14 1 1,108 9.8 Python

    Agent OS: keep specialist agents in a hub, spin up a temporary orchestrator per task. Local-first, works with any model.

    

    Project mention: Stop Rebuilding AI Agents for Every Task | dev.to | 2026-07-03

17. awesome-knowledge-management

    15 5 871 7.8

    A curated list of amazingly awesome articles, people, applications, software libraries and projects related to the knowledge management space

    

18. mcp-nixos

    16 4 830 8.6 Python

    MCP-NixOS - Model Context Protocol Server for NixOS resources

    

    Project mention: Ask HN: Who is using MCP in production? | news.ycombinator.com | 2026-09-03

    In general the advantage of MCP would be the possibility for a fine grained control over the tools the agent is allowed to use. But unfortunately there is a myriad of nightmarish awful mcp servers around which are worse than direct API access or even a cli integration.

    I wont advertise any commercial mcp I use but to give an example for a well designed and useful mcp server I could name the nixos mcp. Its useful because it bundles all the nix resources to one endpoint which is more efficient than web search and gives you better control over the sources.

    https://github.com/utensils/mcp-nixos

    Another one would be this filesystem mcp which is in my opinion to prefer over direct cli access. Of course this depends also on your general sandbox strategy but if you just use a generic docker image there are still many potentially dangerous binaries available and such an mcp can restrict the models capabilities.

    https://github.com/modelcontextprotocol/servers/tree/main/sr...

    And of course there are many service provider offering their mcp with its own llm / agent behind e.g. most web search provider. In this case you most likely already use an mcp without noticing it.

19. llm-functions

    17 1 759 8.1 Shell

    Easily create LLM tools and agents using plain Bash/JavaScript/Python functions.

    

20. obsidian-llm-wiki-local

    18 1 625 - Python

    Karpathy’s LLM Wiki, 100% local with Ollama. Drop Markdown notes → AI extracts concepts → your Obsidian wiki auto-links and grows. Zero sharing. Your notes stay yours.

    

    Project mention: Think with your second brain: a proper Claude Code harness for Obsidian | dev.to | 2026-05-20

    Karpathy's LLM Wiki pattern (gist) describes keeping knowledge as markdown and skipping retrieval infrastructure entirely. Multiple open-source implementations exist: LLM Wiki Compiler, obsidian-llm-wiki-local, nashsu/llm_wiki, Ar9av/obsidian-wiki. The harness shares the anti-RAG stance and traverses progressively rather than dumping the whole corpus into context.

21. obsidian-wiki

    19 4 559 - Python

    Framework for AI agents to build and maintain an Obsidian wiki using Karpathy's LLM Wiki pattern

    

    Project mention: Launch HN: Almanac (YC S26) – AI that knows your company | news.ycombinator.com | 2026-08-31

22. okf-skills

    20 2 384 8.2 Python

    The OKF toolkit for Claude Code — author, maintain, validate & visualize Open Knowledge Format bundles. Plugin, agent skills, and a GitHub Action.

    

    Project mention: OKF Agent Memory – Git-native persistent memory for AI coding agents | news.ycombinator.com | 2026-09-05

23. azan-mcp

    21 1 383 3.1 Python

    Azan + Prayer Time + MCP + AI Agents + Islamic + Salah + A lightweight MCP library to calculate prayer times and trigger Azan with a single tool call. If you’re building an AI agent or prayer application, there’s no need to deal with astronomical calculations, timezones, or edge cases again.

    

24. mcpproxy-go

    22 6 346 9.9 Go

    Supercharge AI Agents, Safely

    

    Project mention: Ask HN: Opinionated Agent Setup? | news.ycombinator.com | 2026-07-09

25. model-context-protocol-resources

    23 1 285 8.6

    Exploring the Model Context Protocol (MCP) through practical guides, clients, and servers I've built while learning about this new protocol.

    

26. SaaSHub

    www.saashub.com sponsored

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    

llm-tools related posts

• Launch HN: Almanac (YC S26) – AI that knows your company

  1 project | news.ycombinator.com | 31 Aug 2026

• Every Check Said Our GA4 Analytics Worked. It Had Never Recorded a Visit

  2 projects | dev.to | 8 Aug 2026

• Show HN: Save your Claude/codex/copilot tokens by using context profiler

  1 project | news.ycombinator.com | 27 Jul 2026

• Test OmniRoute Fallbacks for Semantic Consistency, Not Just Availability

  1 project | dev.to | 21 Jul 2026

• Show HN: LLM Context profiler for tracking context usage by tools, agents, MCPs

  1 project | news.ycombinator.com | 21 Jul 2026

• Show HN: Cruxible – Terraform-like ontology config to governed state for agents

  1 project | news.ycombinator.com | 14 Jul 2026

• GhostCommit Attack

  1 project | news.ycombinator.com | 13 Jul 2026
• A note from our sponsor - AppSignal
  www.appsignal.com | 13 Sep 2026

  Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise. Learn more →

Index

Sponsored

AppSignal knows why the f*#k it crashed.

Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.

www.appsignal.com