Complex software systems are built over timescales that exceed the lifespan of any single coding agent. Most agentic systems preserve continuity through persistent sessions, memories, managers, or shared context. A new paper introduces EvoX Genesis (Genesis), which instead makes the software project persistent while keeping local agents finite-lived.
Genesis represents software as a persistent recursive world: each local world is situated by an accepted version and a repository path. Finite-lived agents propose local changes, recursive delegation moves work across paths, and only accepted consequences advance the persistent version history. This organization was evaluated across formation, continuation, and redevelopment scenarios.
Starting from a repository with no compiler implementation, Genesis used DeepSeek V4 Flash to build a Rust-based C compiler with about 250k tracked lines. The run lasted over 120 hours, archived over 1,000 agent episodes, and incurred only US$44 in model-token charges. The compiler passed the complete c-testsuite and most LLVM and Csmith tests.
In a separate compiler world generated with GLM 5.2, development continued after repeated agent replacement while retaining full test performance. Genesis also reimplemented 13 MESA modules with over 100k Fortran lines as a Rust workspace with nearly 90k Rust lines; across six numerical workloads, it achieved median speedups of 1.55–6.87x.
These results suggest that long-horizon software development can be organized around a persistent project rather than a persistent agent. One only needs to describe what the software should become; Genesis recursively creates local responsibilities, instantiates finite-lived agents where needed, validates what comes back, and carries accepted consequences forward as one persistent software world, scaling to millions of lines of code.