Clickable-refs mandate from Charles: ticket comments link commits, commit bodies link the Redmine comment URL, Discourse links both — one click between Redmine/Gitea/Discourse (GLPI/CMDB change control will extend this). Mechanical body-URL check queued under #441. scripts/mastodon/post.sh: zero-install curl poster; creds land in ~/.creds/mastodon.env (MASTODON_URL/MASTODON_TOKEN, write scope).