1.linshenkx / prompt-optimizer
An AI prompt optimizer for writing better prompts and getting better AI results.
+7,657 stars
from 32,586 · score 8.94
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7 repositories by Attention Score · Aug 5, 2026 – Nov 2, 2026 (UTC)
2.langfuse / langfuse
🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.
+4,527 stars
from 32,317 · score 8.42
3.promptfoo / promptfoo
Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.
+2,943 stars
from 23,761 · score 7.99
4.humanlayer / 12-factor-agents
What are the principles we can use to build LLM-powered software that is actually good enough to put in the hands of production customers?
+2,001 stars
from 24,946 · score 7.60
5.langwatch / langwatch
Open-Source Agent Observability & Evals for AI Platform teams. Trace, test, route and govern every agent & coding assistant in the company.
+1,548 stars
from 3,455 · score 7.35
6.YouMind-OpenLab / awesome-nano-banana-pro-prompts
🍌 World's largest Nano Banana Pro prompt library — 10,000+ curated prompts with preview images, 16 languages. Google Gemini AI image generation. Free & open source.
+766 stars
from 12,958 · score 6.64
7.AgnosticUI / agnosticui
AgnosticUI Local (v2) is a CLI-based UI component library that copies components directly into your project. Works with AI tools, agent-driven UIs, and prompt-ready workflows.
+13 stars
from 820 · score 2.64