The update-openapi-spec workflow was opening a new PR on every daily run because the branch name included ${{ github.run_number }}, which is unique per execution. peter-evans/create-pull-request treats each new branch name as a new PR.

Change

# Before — unique branch per run → new PR every day
branch: update-openapi-spec-${{ github.run_number }}

# After — stable branch → existing PR is updated in-place
branch: update-openapi-spec

With a fixed branch name, subsequent runs push to the same branch and update the existing open PR instead of creating a new one. This matches the pattern already used correctly in update-idp-openapi-spec.yml.

💬 Send tasks to Copilot coding agent from Slack and Teams to turn conversations into code. Copilot posts an update in your thread when it's finished.