# Licensing and provenance

This is a **proprietary, publicly source-visible project, not open source**.
Original project material is covered by [LICENSE](LICENSE). Copyright (c) 2026
Ahmad Ali Parr. All rights reserved. Public visibility does not grant a general
license to use, modify, redistribute, or commercialize that material. Separate
written permission is required except for rights provided by applicable law or
GitHub's platform terms, including its public-repository viewing and forking rights.
See [GitHub's licensing guidance](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/licensing-a-repository).

Source headers use `SPDX-License-Identifier: LicenseRef-Proprietary`, a custom
identifier referring to the root notice rather than an open-source license.
The root notice also covers original documentation and applicable rights in
project assets; PNG files and the machine-readable VERSION file remain intact.

The supplied architecture notes mention Unlambda 2.0.0 and GPL-2.0-or-later
for upstream material from madore.org. Any actual third-party material retains
its own applicable notices and rights; this proprietary notice cannot override
those terms. Compiler and prover licenses are separate from project licensing.

Original supplied sketches in `docs/source-sketches/` and the archived
`docs/unlambda_x5f_ats_x5f_runtime_x5f_architecture.html` are preserved without
new ownership headers. Their provenance must be established before incorporating
third-party implementations or redistributing third-party material.

For separately negotiated permissions, see
[COMMERCIAL-LICENSING.md](COMMERCIAL-LICENSING.md). No standard commercial grant,
price, warranty, or support commitment is implied. Published v1.0.0 source and
evidence archives remain unchanged; current headers do not rewrite that snapshot.