7 new open source AI tools you need right now…

Fireship’s Jeff Delaney demos 7 open-source AI agent tools including a guardrail-removal tool and a prompt framework just acquired by OpenAI.

• PromptFoo, an open-source prompt unit-testing and red-team framework, was recently acquired by OpenAI.
• Heretic removes LLM safety guardrails via a technique called obliteration — no post-training required, works on models like Google Gemma.
• NanoChat implements the full LLM pipeline (tokenize, pretrain, fine-tune, eval, UI); training a small model costs ~$100 in GPU time.
• Agency is an open-source library of agent templates for startup roles (frontend, backend, security, growth hacker) designed to plug into Claude Code.
• OpenViking stores agent memory, resources, and skills in the filesystem with tiered loading instead of a vector DB, cutting token consumption.
• Replit CEO publicly stated that lacking coding experience is becoming an advantage, not a liability.
• MirrorFish is a Chinese-origin multi-agent prediction engine that simulates reactions to breaking news and financial trends across independent agent personalities.

2026-03-12 · Watch on YouTube