Spur, a Rust-based job scheduler, offers Slurm-compatible CLI, REST API, and C FFI with WireGuard mesh networking and GPU-first scheduling.

Spur is an AI-native job scheduler written in Rust that is drop-in compatible with Slurm's CLI, REST API, and C FFI while providing WireGuard mesh networking, GPU-first scheduling, and modern state management.

The system exposes three API surfaces—CLI (spur / sbatch / squeue commands), REST API with native Spur endpoints and Slurm-compatible endpoints at /slurm/v0.0.42/, and a C FFI shim (libspur_compat.so) that exports Slurm-compatible symbols including slurm_submit_batch_job, slurm_load_jobs, and slurm_kill_job.

Spur's architecture uses spurctld (a controller daemon with backfill scheduler and Raft log state management), spurd (node agent daemon), spurdbd (PostgreSQL-backed accounting daemon), and spurrestd (REST API daemon), with the codebase organized into separate Rust crates and test groups mirrored to Slurm's testsuite numbering (t05, t07, t17, t24, t28, t50, t51).