LLM observability: tools for developers

Tool ranking

Ranked by measured growth, normalized across sources. 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

   skill-receipts

   Skill

   ActiveLast commit 35 days ago · 2026-07-30

   Claude Code skills where every entry ships receipts — accuracy-gated benchmarks against baseline and placebo, rejects published

   JavaScriptLicense: MIT

   • agent-skills
   • ai-agents
   • anthropic
   • benchmark
   • claude

   githubcreated 43 days agomeasured growthOpen source ↗

   Install git clone https://github.com/sjh9714/skill-receipts ~/.claude/skills/skill-receipts

   2GitHub starsstable
2. 2

   agent-stack

   Skill

   ActiveLast commit 1 day ago · 2026-09-01

   Production patterns for agent orchestrators, harnesses, evals, MCP/A2A interoperability, memory, provider routing, and LLM usage metering.

   PythonLicense: MIT

   • a2a
   • agent-orchestration
   • agent-skills
   • ai-agents
   • developer-tools

   githubcreated 28 days agonewmeasured growthOpen source ↗

   Install git clone https://github.com/ssheleg/agent-stack ~/.claude/skills/agent-stack

   2GitHub stars+1 (+100.0 %)
3. 3

   pyxen

   Agent

   ActiveLast commit 2 months ago · 2026-06-28

   A lightweight Python library that decouples agentic runtime from applications it builds

   PythonLicense: MIT

   • a2a
   • agent-runtime
   • agents
   • observability
   • portability

   githubcreated 2 months agomeasured growthOpen source ↗

   1GitHub starsstable
4. 4

   supervisor-skill-claude

   Skill

   ActiveLast commit 19 days ago · 2026-08-14

   Multi-agent quality gate skill for Claude Code that researches, reviews, tests and challenges AI-generated work before the final answer.

   • agentic-coding
   • agentic-workflow
   • ai-agent-skills
   • ai-code-review
   • ai-workflows

   githubcreated 19 days agonewmeasured growthOpen source ↗

   Install git clone https://github.com/ma-nucho-pro/supervisor-skill-claude ~/.claude/skills/supervisor-skill-claude

   2GitHub starsstable
5. 5

   CustoFlow

   Other

   DormantLast commit 3 months ago · 2026-06-04

   Multi-agent customer support system with Google ADK & Gemini 2.5 Flash Lite. Kaggle capstone demonstrating 11+ concepts. Automates 80%+ queries, <10s response time.

   PythonLicense: MIT

   • a2a-protocol
   • agent-evaluation
   • google-adk
   • multi-agent-system
   • observability

   githubcreated 9 months agomeasured growthOpen source ↗

   2GitHub starsstable
6. 6

   langfuse-docs

   Skill

   ActiveLast commit 1 day ago · 2026-09-02

   🪢 Langfuse documentation -- Langfuse is the open source LLM Engineering Platform. Observability, evals, prompt management, playground and metrics to debug and improve LLM apps

   MDXLicense: MIT

   • agent-skills
   • agents
   • genai
   • hacktoberfest
   • langfuse

   githubcreated 3 years agomeasured growthOpen source ↗

   Install git clone https://github.com/langfuse/langfuse-docs ~/.claude/skills/langfuse-docs

   239GitHub stars+3 (+1.3 %)
7. 7

   Agents-eval

   Agent

   DormantLast commit 3 months ago · 2026-05-17

   A Multi-Agent System (MAS) evaluation framework using PydanticAI that generates and evaluates scientific paper reviews through a three-tiered assessment approach: traditional metrics, LLM-as-a-Judge, and graph-based complexity analysis.

   PythonLicense: Apache-2.0

   • a2a-protocol
   • agent-evaluation
   • agentbeats
   • ai-agents
   • benchmarks

   githubcreated 19 months agomeasured growthOpen source ↗

   2GitHub starsstable
8. 8

   boundary-bench

   Agent

   ActiveLast commit 7 days ago · 2026-08-26

   Deterministic crash tests for agent control planes: paired worlds, hard stops, budgets, scopes, approvals, and hash-linked receipts.

   TypeScriptLicense: Apache-2.0

   • a2a
   • agent-evaluation
   • ai-agents
   • benchmark
   • deterministic-replay

   githubcreated 43 days agomeasured growthOpen source ↗

   1GitHub starsstable
9. 9

   DriftSentinel

   Agent

   ActiveLast commit 2 months ago · 2026-06-20

   Agent 降智检测与自愈公评网络 — an immune system for the AI agent society

   TypeScriptLicense: MIT

   • a2a
   • agent
   • agent-guard
   • ai-sre
   • drift-detection

   githubcreated 2 months agomeasured growthOpen source ↗

   1GitHub starsstable
10. 10

    kaggle-capstone-ai-agent

    Agent

    DormantLast commit 9 months ago · 2025-11-26

    A safety-first multi-agent mental health companion with real-time distress tracking, triple-layer guardrails, and evidence-based grounding techniques. Built for Kaggle × Google Agents Intensive 2025 Capstone (Agents for Good Track)

    Python

    • a2a-protocol
    • agent-evaluation
    • agents-for-good
    • ai-agents
    • crisis-support

    githubcreated 9 months agomeasured growthOpen source ↗

    1GitHub starsstable
11. 11

    DeepSeek-Infra

    Other

    ActiveLast commit 1 day ago · 2026-09-02

    Local-first Agentic AI Infrastructure Platform with LLM Gateway, Agent DAG Runtime, MCP Tool Hub, A2A Agent Mesh, Local RAG, Tool Sandbox and Observability.

    Python

    • a2a
    • agent-runtime
    • ai-infra
    • deepseek
    • fastapi

    githubcreated 3 months agomeasured growthOpen source ↗

    1GitHub starsstable
12. 12

    primal-core

    Agent

    DormantLast commit 3 months ago · 2026-05-18

    The reliability and interoperability layer for AI agents. A2A-native. MCP-bridged.

    PythonLicense: Apache-2.0

    • a2a
    • agent-framework
    • agents
    • ai
    • ai-safety

    githubcreated 3 months agomeasured growthOpen source ↗

    1GitHub starsstable
13. 13

    idun-agent-platform

    Skill

    ActiveLast commit 27 days ago · 2026-08-06

    🟪 Open-source runtime that ships any LangGraph or Google ADK agent as a production-ready FastAPI service. Bundled , AG-UI copilotkit API, chat UI, 15+ guardrails, MCP, OpenTelemetry, OIDC. One pip install. Self-hosted, no vendor lock-in.

    PythonLicense: GPL-3.0

    • a2a-protocol
    • ag-ui-protocol
    • agent-platform
    • agentic-ai
    • agents

    githubcreated 15 months agomeasured growthOpen source ↗

    Install git clone https://github.com/Idun-Group/idun-agent-platform ~/.claude/skills/idun-agent-platform

    198GitHub stars-1 (-0.50 %)
14. 14

    historian

    Agent

    ActiveLast commit 2 months ago · 2026-07-02

    A local A2A event and continuity service for agent applications, with structured history, provenance-safe transcripts, literal search, and natural-language queries.

    PythonLicense: BSD-2-Clause

    • a2a
    • agent-memory
    • ai-agents
    • event-sourcing
    • fastapi

    githubcreated 2 months agomeasured growthOpen source ↗

    1GitHub stars+1
15. 15

    skill-adherencia-reglas

    Skill

    ActiveLast commit 33 days ago · 2026-07-31

    Skill instalable para Claude Code que mide si tu agente cumple las reglas establecidas. Lee el historial de sesiones de tu disco y devuelve un porcentaje por regla de cumplimiento. Sin instalar nada, sin red, biblioteca estándar.

    PythonLicense: MIT

    • ai-evaluation
    • claude
    • claude-code
    • claude-code-plugin
    • claude-code-skill

    githubcreated 37 days agomeasured growthOpen source ↗

    Install /plugin marketplace add jleonceo/skill-adherencia-reglas

    1GitHub starsstable
16. 16

    adherencia-reglas

    Skill

    ActiveLast commit 33 days ago · 2026-07-31

    Mide si tu agente de IA cumple las reglas que le escribiste. Lee el historial local de Claude Code y devuelve un porcentaje por regla. Sin instalar nada, sin red, biblioteca estándar.

    PythonLicense: MIT

    • agent-evaluation
    • ai-agents
    • claude-code
    • claude-code-skill
    • claude-code-skills

    githubcreated 37 days agomeasured growthOpen source ↗

    Install git clone https://github.com/jleonceo/adherencia-reglas ~/.claude/skills/adherencia-reglas

    1GitHub starsstable
17. 17

    agentanvil

    Agent

    DormantLast commit 4 months ago · 2026-04-29

    Contract-based testing for LLM agents: hybrid evaluation, multi-agent + A2A, deterministic replay.

    PythonLicense: MIT

    • a2a
    • agents
    • contracts
    • evaluation
    • llm

    githubcreated 4 months agomeasured growthOpen source ↗

    0GitHub starsstable
18. 18

    mcp-smb-products

    MCP

    ActiveLast commit 2 months ago · 2026-07-03

    8 MCP SMB products — standalone AI servers for SMBs: Guardrails, FinOps, Observability, Router, Trust Score, Memory, ThinkSecure, A2A Lite. 37 tools, TNC credits billing.

    PythonLicense: MIT

    • a2a-protocol
    • ai-governance
    • finops
    • guardrails
    • mcp

    githubcreated 4 months agomeasured growthOpen source ↗

    1GitHub starsstable
19. 19

    kubesphere

    Skill

    ActiveLast commit 50 days ago · 2026-07-15

    The container platform tailored for Kubernetes multi-cloud, datacenter, and edge management ⎈ 🖥 ☁️

    Go

    • agent-skills
    • ai
    • cloud-native
    • cncf
    • devops

    githubcreated 8 years agomeasured growthOpen source ↗

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

    17 037GitHub stars+8 (+0.05 %)
20. 20

    craft-skills

    Skill

    ActiveLast commit 11 days ago · 2026-08-22

    Research-backed, eval-driven skills for AI agents

    PythonLicense: Apache-2.0

    • agent-skills
    • ai-agents
    • codex
    • design
    • evals

    githubcreated 31 days agomeasured growthOpen source ↗

    Install git clone https://github.com/ZSeven-W/craft-skills ~/.claude/skills/craft-skills

    142GitHub stars+18 (+14.5 %)
21. 21

    suede-creator-skills

    MCP

    ActiveLast commit 1 day ago · 2026-09-02

    74 open-source Agent Skills for Claude Code and Codex: AI SEO, AEO and GEO, code review with an A-F ship grade, CI gates, AI evals, design systems, conversion copy, Instagram growth, iOS and Android app shipping, creator rights, and…

    JavaScriptLicense: MIT

    • agent-orchestration
    • agent-skill
    • agent-skills
    • ai-agents
    • ai-coding

    githubcreated 3 months agomeasured growthOpen source ↗

    129GitHub stars-4 (-3.0 %)
22. 22

    CodeFlow

    Agent

    ActiveLast commit 6 days ago · 2026-08-28

    面向长程研发任务的 Java Agent Harness，支持 A2A 跨语言协作、可恢复执行、上下文工程与 Eval 驱动开发。

    JavaLicense: Apache-2.0

    • a2a
    • agentic-ai
    • ai-agents
    • developer-tools
    • evals

    githubcreated 7 days agonewmeasured growthOpen source ↗

    0GitHub starsstable
23. 23

    adlc-team-skills

    Skill

    ActiveLast commit 14 days ago · 2026-08-20

    🐙 ADLC Team Skills — Agentic SDLC for Engineering Teams

    ShellLicense: MIT

    • adr
    • agent-skills
    • agentic-sdlc
    • ai-coding
    • developer-tools

    githubcreated 44 days agomeasured growthOpen source ↗

    Install git clone https://github.com/tikalk/adlc-team-skills ~/.claude/skills/adlc-team-skills

    132GitHub stars+1 (+0.76 %)
24. 24

    dynatrace-for-ai

    Skill

    ActiveLast commit 3 days ago · 2026-08-31

    Skills, prompts, and instructions for building AI agents on top of Dynatrace production context

    JavaScriptLicense: Apache-2.0

    • agent-skills
    • ai-agents
    • claude-code
    • devops
    • dql

    githubcreated 5 months agomeasured growthOpen source ↗

    Install git clone https://github.com/Dynatrace/dynatrace-for-ai ~/.claude/skills/dynatrace-for-ai

    132GitHub stars+4 (+3.1 %)
25. 25

    langfuse-mcp

    MCP

    ActiveLast commit 7 days ago · 2026-08-26

    A Model Context Protocol (MCP) server for Langfuse, enabling AI agents to query Langfuse trace data for enhanced debugging and observability

    PythonLicense: MIT

    • agent-skills
    • ai-agents
    • claude-code
    • codex
    • developer-tools

    githubcreated 17 months agomeasured growthOpen source ↗

    105GitHub starsstable