- a bot floating a body-height above the ground in mid-stride (B357): cmangos's Playerbots moves its bots as Player objects under `SMSG_MONSTER_MOVE`, and our ground clamp skipped anything that was not a Unit, so a splined Player kept the wire Z verbatim — and a spline is a straight chord, which over a hollow leaves the body in the air; kind is not a question the reference asks (`0x616620` runs every registered mover once per frame, reading only its own flag word), so one rule grounds every Unit plus a Player from the moment a server spline first moves it, never the body we steer; and a re-sent identical wire pose no longer leaves a unit floating (1921); the body we STEER is a mover too — the reference hands a ride's spline displacement to the same vertical-zeroing step as walking, so the spline owns XY and facing and the ground owns Z, closing a +0.47 yd gap at mid-chord on an Elwynn slope, endpoint included (1927)
- the client refuses a stunned, silenced or pacified cast itself, in the requirement validator `0x6094f0` whose mounted and moving legs we already model, before any packet — and the three arms are not symmetric: STUNNED refuses everything, SILENCED and PACIFIED run only where `Spell.dbc PreventionType` declares them, so a silence stops casts and leaves melee abilities alone and a pacify does the reverse; the leg sits above the mounted block and below the equipped-item requirement, so stunned and missing the weapon you are told about the weapon; `PreventionType` is column 165, Auto Shot alone telling it from its look-alike neighbour; the preflight banner splits movement blockers from ability blockers, since a disarm or a pacify touches no movement gate; and the refusal sink is an explicit parameter rather than a ladder field, because a resource reachable twice from one system panics on the first live frame (1903)
- a disarm greys what needs the hidden hand: the spell equipped-item test is `0x5f0c50`, walking all 23 equipment slots, rejecting a deprecated or genuinely broken item, and taking its slot mask from `AttributesEx3` (main-hand-only, off-hand-only, else every slot) — DISARMED strips the hidden hand's bit out of that mask, so a main-hand-only ability whose one allowed hand is the one the disarm took has an empty mask and dies, Heroic Strike greyed with its tooltip line red; using a worn weapon while disarmed answers `ERR_CANT_USE_DISARMED`, the client's own refusal at rung 15 of the item-use ladder's 20, above the bind-confirm arm and never a bag click (1903); and two stale claims go — `UNIT_FLAG_STUNNED` no longer says the idle selectors bail on it (0889 had refuted that at the bytes), and the charter's `ShowPetition` arm is rung #9 of that same ladder, read rather than reasoned
- `UpdateSpells()` is twelve bytes and all of them are the event: it ends in a jump into the event signal with 0x104 = `SPELLS_CHANGED` in hand, whose repaint is FrameXML's alone, so a no-op would not have been faithful and our own repainting stand-in was wrong in both directions at once; it fires synchronously as the reference's does, at the cost of a fire-path refactor rather than a next-tick queue; `PlayerHasSpells()` is a hard-coded 1, no branch, no store read, pinned to answer 1 on an empty spellbook, where a plausible implementation diverges silently (1924); and three integration harnesses loaded every document against an empty base, so a self-sourcing chain file loaded as an empty shell with every handler missing — none of their lists could fail, so the fix lands with a guard watched failing first, `FadingFrame.xml`, one relative script reference and nothing else (1923)
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
