Open a client's roadmap-data.js, edit, save — then redeploy with wrangler to publish.
Direct one-click Save isn't available here (needs Chrome/Edge over https, not a local double-clicked file).
"Open roadmap-data.js…" and "Download file" still work — click Open, make your edits, then Download
to get the updated file and replace the one on disk before redeploying.
Open a roadmap-data.js file above to start editing.