A pet-bar spell press armed no global cooldown on the pet's list. Claw or Firebolt sent `CMSG_PET_ACTION`, and no slot on the pet bar swept, so the bar looked ready while the pet could not cast. Only a spell with its own recovery timer, such as Bite, showed a sweep.
In the reference, the pet bar's spell arm (`0x4bd240` in `0x4bd1d0`) first handles two cases that skip the cooldown:
- A spell that is a live aura on the pet sends the cancel and returns.
- A possessed unit, or a spell with `AttributesEx4 & 0x20` (`0x4bd355`, `0x4bd35e`), takes the generic cast entry `0x6e4b60`.
Every other press calls `StartGlobalCooldown 0x6e2de0(spellId, 1)` (`0x4bd367`-`0x4bd36e`) before the `0x175` send. That call applies the spell's own `StartRecoveryCategory`/`StartRecoveryTime` pair, under spell-mod op 21, into the pet's list (`0xcecaec + 0x18`). This press is the only place the pet's GCD starts, because the `SMSG_SPELL_GO` pet leg inserts none (`0x6e85f7`).
Changes:
- `SpellDisplay` reads `AttributesEx4` (column 10).
- `PetPress::press` arms the pet list's GCD through the existing `Cooldowns::start_gcd`, with the player's modifier tables. It skips the arm for the cases above and for an unresolved record or pet object (`0x4bd2fe`, `0x4bd34f`).
- The feed's cooldown diff then fires `PET_BAR_UPDATE_COOLDOWN`.
In the shipped `Spell.dbc` the pair is 133/1500 for most pet spells (later Claw ranks, Bite, Lash of Pain, Torment, Suffering) and 133/1000 for Firebolt and Claw rank 1. A real-data test pins both values.
Tests:
- `ui_pet/press_tests.rs` presses through `PetPress::press_slot` and covers:
- the GCD across the slots sharing the category, read back through `GetPetActionCooldown`;
- no pair;
- possessed;
- `AttributesEx4 & 0x20`;
- the aura cancel;
- no pet object;
- op 21.
- `real_pet_spells_carry_the_gcd_pair_and_ex4_reads_column_10` reads the real `Spell.dbc`.
Fixes#589🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
