Skygen is a Rust-based OpenAPI v3 code generator that turns provider specs (Cloudflare, DigitalOcean, Exoscale, Hetzner, Scaleway) into ready-to-publish SDK crates.

The skygen CLI ingests a spec plus a small TOML config and bootstraps a full crate: Cargo.toml, module tree, reusable client/runtime, and provider-specific scaffolding. Templates leverage embedded assets and Tera, while a resolver module walks the OpenAPI document to expand $refs with cycle detection.

Generated SDKs emphasize a minimal footprint via feature-gated dependencies (reqwest transport optional, TLS protocols selectable) and expose pluggable transports so users can swap in custom HTTP stacks.

skygen generate -c <config.toml> -i <spec.yaml|spec.json> -o <output-dir>