License

MechCrate is dual-licensed. In the words of the repository’s own README:

Licensed under either of Apache License, Version 2.0 or MIT license at your option.

The workspace manifest carries the same thing in SPDX form:

license = "MIT OR Apache-2.0"

OR is the operative word. You pick one. You do not have to satisfy both.

What you get

	MIT	Apache-2.0
Use, modify, distribute, sell	yes	yes
Must keep the notice	yes	yes
Express patent grant	no	yes
Explicit trademark carve-out	no	yes
Length	one page	long

Choosing MIT gets you the shortest permissive licence in common use. Choosing Apache-2.0 gets you an explicit patent grant from contributors and clearer handling of modifications and trademarks, at the cost of reading more.

This pairing is the Rust ecosystem’s default, and the reason is compatibility in both directions: MIT lets the code be used from projects that cannot take Apache-2.0’s terms, and Apache-2.0 lets it be used where an express patent grant is required. Offering both means neither constraint blocks you.

The copyright notice reads Copyright (c) 2026 PRICELOVE, LLC and mech-crate contributors.

Contributing

Contributions carry the same dual licence, automatically:

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

There is no CLA to sign and no copyright assignment. Opening a pull request is the whole ceremony.

The documents on this site

The techniques corpus and these guides are files in the same repository (docs/development/ and site/apps/site/src/content/), so the same terms cover them. Individual corpus documents cite external sources in their provenance footers; those citations point at their own authors’ work under their own terms, and the corpus document is the summary and analysis, not a reproduction.

→ LICENSE-MIT · LICENSE-APACHE