From d95dd32f36faededb06212d5ded321780f6b1999 Mon Sep 17 00:00:00 2001 From: deeaitch Date: Wed, 29 Jul 2026 16:50:12 -0400 Subject: [PATCH] License ADR --- reference/decisions/ADR-002-license.md | 87 ++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100644 reference/decisions/ADR-002-license.md diff --git a/reference/decisions/ADR-002-license.md b/reference/decisions/ADR-002-license.md new file mode 100644 index 0000000..f102733 --- /dev/null +++ b/reference/decisions/ADR-002-license.md @@ -0,0 +1,87 @@ +# ADR-002: Use the MIT License + +* **Status:** Accepted +* **Date:** 2026-07-29 + +## Context + +The project is intended to be an open educational and engineering reference for designing OTA update systems on embedded Linux. + +The repository may contain: + +* documentation; +* diagrams; +* source code; +* scripts; +* configuration examples; +* reference implementations; +* test utilities; +* failure-injection experiments. + +The license should allow engineers to study, modify, reuse, and adapt the material in both personal and commercial projects. + +The license should also be familiar, permissive, and easy to understand. The project does not require derivative works to remain open source. + +## Decision + +The repository will be licensed under the MIT License. + +The license will apply to the repository content unless a specific file or third-party component explicitly states otherwise. + +A standard `LICENSE` file containing the MIT License text will be included at the repository root. + +## Alternatives Considered + +### Apache License 2.0 + +Apache 2.0 is a permissive license that includes an explicit patent grant and patent retaliation provisions. + +It was not selected because the project is currently an educational reference design rather than a large infrastructure framework or commercially governed software platform. + +The additional legal complexity does not currently provide enough practical benefit over MIT. + +### GNU General Public License + +The GPL would require derivative works distributed under certain conditions to remain under the same license. + +It was not selected because the project is intended to encourage broad reuse, including adoption of ideas and code in commercial embedded products. + +A copyleft requirement could discourage some companies or engineers from using the examples. + +### BSD 2-Clause or BSD 3-Clause License + +The BSD licenses are permissive and would also be suitable for the project. + +They were not selected because MIT is more familiar to many readers, concise, and already consistent with other projects maintained by the author. + +### No Explicit License + +Without a license, the repository would remain protected by copyright by default and other people would not have clear legal permission to reuse the material. + +This would conflict with the educational and open-source goals of the project. + +## Consequences + +### Positive + +* The project can be used in open-source and commercial environments. +* Engineers can copy, modify, and redistribute examples. +* The license is short and widely understood. +* The project remains easy to adopt. +* The license is consistent with the author’s other open-source repositories. +* Attribution and preservation of the license notice are still required. + +### Negative + +* Modified versions are not required to remain open source. +* Improvements may be used commercially without being contributed back. +* The license does not include the explicit patent language provided by Apache 2.0. +* The software is provided without warranty or liability protection beyond the license terms. + +## Notes + +The repository is a reference design and educational project. + +The MIT License permits reuse but does not imply that the implementation is production-ready, certified, secure for every deployment, or suitable for safety-critical systems. + +These limitations should also be explained in the repository README.