Add a RELEASE.md file outlining the release process

RELEASE.md

@@ -0,0 +1,64 @@
+# Release process
+
+Each release follows semantic versioning. You can read more about this in the
+[Versioning](README.md#versioning) section of the README.
+
+## Cadence
+
+New releases are created based on the amount of meaningful change ready to be
+shipped, and not based on a regular time period.
+
+Major new releases will be agreed upon by the TSC.
+
+## Criteria
+
+Making a new release requires at least one change that meaningfully impacts
+end users of the library and/or a patched bugfix. Major versions should require
+multiple API breaking changes to be bundled together to minimise maintenance for
+downstream projects.
+
+Internal changes for the project itself should not constitute a new release.
+
+All tests must pass before a release is made. This is already enforced by CI on
+the `main` branch, but it should be confirmed before tagging.
+
+## Methodology
+
+When creating a new release, the following procedure should be followed:
+
+1. Evaluate the version number for the release based on semantic versioning and
+   the included changes.
+2. Push up a PR adding the version number for Unreleased changes, starting a
+   new Unreleased section.
+3. Once the PR is merged to main, tag the commit using the new version number
+   (see [Tagging](#tagging)).
+4. Create a release on GitHub with notes following the format described in
+   [Release notes](#release-notes).
+5. Send an email to the mailing list: https://lists.aswf.io/g/openqmc-discussion
+6. Update the Slack channel: https://academysoftwarefdn.slack.com/archives/C09BXDAMFTP
+
+## Tagging
+
+Releases are tagged on the merge commit on `main` using the new version number
+with a `v` prefix, for example `v0.7.2`. Create a tag and push it:
+
+```sh
+git tag -a v0.7.2
+git push origin v0.7.2
+```
+
+## Release notes
+
+The GitHub release notes start with a brief overview sentence summarising the
+release, followed by the relevant sections copied from the version's entry in
+[CHANGELOG.md](CHANGELOG.md). Only include sections that have entries. For
+example:
+
+```md
+Minor patch release primarily to resolve issue with unwanted static noise
+patterns across frames.
+
+### Changed
+
+- Improve quality of uniform float distribution in `oqmc::uintToFloat`.
+```

SUPPORT.md

@@ -2,9 +2,8 @@
 
 There are a few ways to connect with the OpenQMC project:
 
-- Add yourself to the TBD mailing list.
-- Start a thread on the TBD forums.
-- Join the TBD Slack channel.
+- Add yourself to the OpenQMC [mailing list](https://lists.aswf.io/g/openqmc-discussion).
+- Join the OpenQMC [Slack channel](https://academysoftwarefdn.slack.com/archives/C09BXDAMFTP).
 - Create a new GitHub [issue](https://github.com/AcademySoftwareFoundation/openqmc/issues).
 
 ## How to ask for help