This tool helps plan an Odoo version upgrade. Upload the current addons.yaml and, for every Odoo version between "From" and "To", it shows how addons.yaml should look, plus a repos.yaml with the open PR/MR merges needed for modules that aren't upstream-merged yet.
*** Modules with neither a merge nor an open migration PR at a given version are listed as missing so you know what still blocks that jump.