GitHub Copilot instructions for velero-io/velero

Changelog requirement

Velero uses per-PR changelog fragments that are assembled into release notes.

File naming convention

Every shipping PR must add exactly one file at:

changelogs/unreleased/<PR_NUMBER>-<github_username>

• <PR_NUMBER> is the pull request number (e.g. 10200).
• <github_username> is the GitHub login of the PR author (e.g. jdoe).
• The file has no extension.
• The file content is a single line describing the change (the PR title is a sensible default).

Example: PR #10200 by jdoe → changelogs/unreleased/10200-jdoe

The easiest way to create this file is:

make new-changelog CHANGELOG_BODY="Brief description of the change"

make new-changelog reads the PR number and author from gh pr view; the file is written automatically to the correct path with the correct name.

The CI check (hack/changelog-check.sh) looks for changelogs/unreleased/<PR_NUMBER>-* and fails if no file is found.

When a changelog is NOT required

A changelog entry is not required when a PR exclusively changes non-shipping content, i.e. the only files touched belong to one or more of these categories:

When you open or review a PR that falls into one of the above categories (and does not modify pkg/, internal/, cmd/, vendor/, hack/, Makefile, go.mod, go.sum, or changelogs/**), apply the label kind/changelog-not-required instead of requesting a changelog entry. The labeler.yml auto-labeler handles this automatically for most cases; apply the label manually if the auto-labeler did not.

Backport / cherry-pick workflow

Velero uses .github/workflows/backport.yml to automate cherry-picks onto release branches.

• Before merge: comment /backport release-1.17 (or /cherrypick release-1.17) to add the label backport release-1.17 to the PR. Multiple branches can be space-delimited: /backport release-1.17 release-1.18. The label causes the backport to run automatically when the PR merges.
• After merge: the same comment immediately creates the backport PR.
• Shorthand: a bare version like /backport 1.17 is automatically expanded to release-1.17; this works generically for any X.Y version.
• Changelog filename: the cherry-picked commit(s) carry over the source PR's changelogs/unreleased/<source_pr>-<user> file. The workflow automatically renames it to <backport_pr>-<user> on the backport branch so hack/changelog-check.sh passes and release notes cite the correct PR.
• Changelog-not-required: if the source PR is labeled kind/changelog-not-required, that label is copied to the backport PR so it isn't flagged as missing a changelog.
• DCO signoff: every commit on a backport branch is re-signed with the bot's Signed-off-by trailer (git rebase --signoff), including cherry-picked commits from the original author, so the DCO check always passes on backport PRs.
• Only repository owners, members, and collaborators may trigger these commands.

General coding guidelines

• Follow the existing code style of the file being edited.
• Add unit tests for new exported functions in pkg/.
• Do not commit secrets, credentials, or API tokens.
• Keep PRs focused; prefer small, reviewable changes over large omnibus PRs.