Armin Ronacher announced that Mario Zechner, creator of the Pi coding agent, is joining Earendil. Pi is an agent infrastructure library that Ronacher calls "one of the most thoughtful" in the space, built by someone who "cares deeply about software quality, taste, extensibility, and design." Two projects that share a contrarian philosophy in the AI agent space are now together: quality over velocity, care over throughput.
Earendil has been building Lefos, what Ronacher calls a "machine entity" designed for deliberate communication rather than efficiency optimization. Their stance is explicitly critical of where much of AI is headed. "If all we do is use these systems to accelerate the production of slop, we will have missed the opportunity entirely," Ronacher writes. An industry race to ship quickly has produced tools that work but lack coherence and craft. Agent proliferation has created a third software development paradigm. Pi and Lefos come from different starting points but share a similar instinct about what good tools should feel like.
Pi will continue as open, extensible software under Earendil's stewardship. Ronacher and his colleague Colin plan to invest in Pi's future, though details about how it relates to Lefos remain forthcoming. What exactly Earendil is, whether startup, studio, or something else, remains unclear even to observers. Hacker News commenters noted the company's website doesn't make its corporate structure obvious. But the practical upshot is straightforward: two of the more careful projects in the AI agent space are now under one roof, both betting there's value in building things that last rather than things that ship fast.