Prime Intellect's prime-agent took 2,293 stars in one day with a harness that rewrites its own state.

prime-agent hit #1 on GitHub Trending August 8 at 7,578 total stars, 634 forks, MIT, TypeScript. Two abstractions: a Recursive Language Model treating context as variables and subagents as function calls inside a persistent IPython REPL, and a "Continual Harness" (arXiv 2605.09998) storing prompts, memories and subagent specs as durable state a /refine command updates with evidence-backed edits, never touching the immutable base system prompt. Skills are importable Python packages, not markdown. Daemon-backed sessions survive terminal disconnects. Running agents message each other without routing through the user. The immutable-base-prompt-plus-mutable-state split is the design decision I'd copy.