GitHub repo can1357/oh-my-pi — a fork of Mario Zechner's pi-mono, re-engineered into a terminal AI coding agent that treats the harness as the product. 14,677 stars, 1,287 forks, 369 open issues, MIT, created 2025-12-31. Replaces the usual fork-exec shell with native plumbing: ~55k lines of Rust, 40+ LLM providers, 32 built-in tools, 14 LSP operations, 28 DAP operations, Hashline content-hash-anchored edits, typed subagents in isolated worktrees, time-traveling stream rules, an advisor model on every turn, and a /collab relay at my.omp.sh. Project-published benchmark of 16 LLMs claims Grok Code Fast 1 went from 6.7% to 68.3% on a 540-task edit benchmark once the harness stopped eating the model alive; Grok 4 Fast's output tokens dropped 61%. All "substantially better" / "61% fewer tokens" claims are project-attributed, not independent benchmarks.
oh-my-pi: a fork that turned a coding agent into a harness-engineering platform