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Installation

Cargo (Rust)​

cargo install schemalint

This installs the schemalint binary to your Cargo bin directory (typically ~/.cargo/bin). Requires Rust 1.80+.

GitHub Releases​

Pre-built binaries are available for:

  • Linux (x86_64, aarch64)
  • macOS (x86_64, aarch64)
  • Windows (x86_64)

Download the latest release from GitHub Releases.

PyPI​

python -m pip install schemalint

The wheel supports Python 3.9+ and installs the actual schemalint command plus the bundled schemalint_pydantic discovery sidecar — no Rust toolchain or second SchemaLint package is required. check-python uses the Pydantic already installed in your environment; Pydantic 1.10 and 2.x are supported, and the wheel never installs or upgrades Pydantic at runtime.

npm​

npm install -g @1nder-labs/schemalint

For a project-local CI install, prefer:

npm install --save-dev @1nder-labs/schemalint
npx schemalint --version

The npm package supports Node 18, 20, and 22. On macOS and Linux its install script downloads and verifies the platform binary and puts it at the package's bin/schemalint entry, so the command starts as fast as the native binary (about 2 ms) with no Node process in front of it. It also bundles the TypeScript loader and Zod ingestor.

pnpm and bun block dependency install scripts by default. schemalint still works then: a small Node launcher downloads and verifies the binary on first run, at the cost of Node start-up (about 40 ms) on every command. Allow the script to get the native start-up:

pnpm add -g --allow-build=@1nder-labs/schemalint @1nder-labs/schemalint
pnpm approve-builds                      # in a project
bun add -g --trust @1nder-labs/schemalint
bun pm -g trust @1nder-labs/schemalint   # already installed

Windows always uses the Node launcher. Supported schemas include Zod v3 (>=3.20), Zod v4 from 4.0.1 through current 4.4.3, and zod/mini; no global tsx or TypeScript installation is required.

Verify Installation​

schemalint --version

All ingestion and JSON-RPC caches are bounded and process-local. SchemaLint does not persist source schemas or normalized schema data to disk.