flox-environments

Create reproducible cross-platform development environments with Flox — a Nix-based declarative environment manager. Use this skill whenever you need to set up projects that have system-level dependencies (compilers, databases, native libraries like openssl, libvips, BLAS/LAPACK); create reproducible toolchains for Python, Node.js, Rust, Go, C/C++, Java, Ruby, Elixir, PHP, or other languages; manage environments that behave identically on macOS and Linux; pin exact package versions for a team; run local services (PostgreSQL, Redis, Kafka) alongside developer tooling; onboard new developers with a single command; or solve “it works on my machine” problems. It’s especially valuable for AI-assisted and vibe-coding workflows — Flox allows agents to install tools into a project-scoped environment without sudo, without polluting the host system, and without sandbox restrictions, and the resulting environment is committed to the repository so anyone can reproduce it instantly. Use this skill even if the user doesn’t explicitly mention Flox, whenever they describe the need for reproducible, declarative, cross-platform development environments and system packages. Also use it when the user mentions .flox/, manifest.toml, flox activate, or FloxHub.