Fan build planner encodes entire game builds in URL fragments with patch-version stamps

A developer of a fan-made planner for the browser survivor game Azeroth Survivors describes storing builds with no accounts or database, placing everything in the URL fragment so that saving and sharing are the same action. Builds are packed into a fixed byte layout covering class, skill slots, banished skills, and talent ranks in 3-bit fields, producing a 32-character base64url string for a 40-talent class. Skills are referenced by index rather than name, so the format carries a version nibble that must be bumped whenever offsets or widths change, and decoding returns null on mismatch. A later format adds a name, a game version stamp, and per-stage plans, letting the planner check whether a shared link's talents, skills, and upgrades still exist after a game patch.