# Patch submission The development of MCUboot takes place in the [MCUboot GitHub repository](https://github.com/mcu-tools/mcuboot). To submit patches, use GitHub pull requests. Each commit has to have, in the commit message, a "Signed-off-by" line that mentions the author (and the committer, if that is different). You must add this line at the end of the commit text, separated by a blank line. You can also add a line linking the commit to a specific GitHub issue, as this section supports multiple lines, similarly to RFC-2822. The supported trailer lines are structured as follows: - A line that indicates that the signer agrees to the "Developer Certificate of Origin" located at the bottom of this page: ``` Signed-off-by: Developer Name ``` - A line that links this commit to specific GitHub issues, if present: ``` Keyword #GH_issue_number ``` For more details about linking a GitHub pull request to a GitHub issue, see this [link] (https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue). ## Release notes To facilitate creating release notes at release time, all non-trivial changes must include a release note snippet in the pull request. This can be either a separate commit, or as part of a single commit (generally, if there are multiple commits to the pull request, the release note snippet should be a separate commit, and a pull request that is a single commit can include the release note snippet in that commit). In either case, the release notes must be included in the same PR that makes the given change. The release notes should be placed in the `docs/release-notes.d` directory. Please see the readme file in that directory for specifics. ## Developer certificate of origin The following is the "Developer Certificate of Origin": ``` Developer Certificate of Origin Version 1.1 Copyright (C) 2004, 2006 The Linux Foundation and its contributors. 1 Letterman Drive Suite D4700 San Francisco, CA, 94129 Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Developer's Certificate of Origin 1.1 By making a contribution to this project, I certify that: (a) The contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file; or (b) The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right under that license to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license), as indicated in the file; or (c) The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it. (d) I understand and agree that this project and the contribution are public and that a record of the contribution (including all personal information I submit with it, including my sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved. ```