docs/data/reusables/actions/reusable-workflow-calling-syntax.md

• {owner}/{repo}/.github/workflows/{filename}@{ref}{% ifversion fpt or ghec or ghes > 3.4 or ghae > 3.4 %} for reusable workflows in {% ifversion fpt %}public and private{% elsif ghec or ghes > 3.7 or ghae > 3.7 %}public, internal and private{% else %}public and internal{% endif %} repositories.
• ./.github/workflows/{filename} for reusable workflows in the same repository.{% endif %}

{ref} can be a SHA, a release tag, or a branch name. Using the commit SHA is the safest for stability and security. For more information, see "AUTOTITLE."{% ifversion fpt or ghec or ghes > 3.4 or ghae > 3.4 %} If you use the second syntax option (without {owner}/{repo} and @{ref}) the called workflow is from the same commit as the caller workflow.{% endif %} Ref prefixes such as refs/heads and refs/tags are not allowed.