`SPELLCAST_STOP` fired only at `SMSG_SPELL_GO` and only for a timed cast, so instants, channels and item uses never sent it to addons.
In 1.12.1 it fires only from the cast result: the handler's pop `0x6e741a` → `0x6e4940` (`0x6e4a4b`) while the pending record's caster word `0xceac50` is the player's, filled by the attempt (`0x6e4fb1`) and cleared when the event fires (`0x6e4a5a`); and `0x6e74cb` for a non-failure result with nothing in flight. The go handler fires none. vmangos sends START, RESULT, GO, so a timed cast's bar still ends at completion.
The attempt now fills the caster word, the result fires STOP as those two sites do, local cancels fire only while the word holds, and the go-time raise is gone. Tests replay each cast kind in vmangos order; a live run logged STOP for an instant, a timed cast, a channel and an item use.
Fixes#1604🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Sam Sung
ec97169554