The XML upload is the one place hand-written XML reaches the game, whose
load path trusts the XML because the server writes it itself. Instead of
making the game skip bad data at load, the upload is checked against
what the load path assumes and refused (400, with the problems) when the
game couldn't load it: required elements, attributes that must parse
(flags read with std::stoul/stoull), required item and mission fields,
known inventory types, mission states and character versions, items and
missions that exist in the CDClient, unique item IDs and slots, and the
acct attribute matching the owner.
Suspicious but loadable content is returned as warnings that need
confirm=true (409 otherwise): contraband (same matching as the world,
now shared in ContrabandRules.h), stacks above the stack size, coins,
level or u-score out of reach, a GM level above the account's.
Contraband marked flag-and-remove is removed only if the uploader asks;
once stored, findings are flagged (CONTRABAND) and audited. The XML
editor shows the findings and offers "Save anyway". Related: issue 1332.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
