B2: Removed shield/counterspell from Mage/Sorcerer defaults and hellish_rebuke/counterspell
from Warlock — reactions are EffectReaction and combat has no reaction window yet, so
auto-granting them just litters the spellbook with dead entries. Substituted L1/L3
staples (sleep, fly, burning_hands, chromatic_orb where class-tagged appropriately).
B3: Replaced the stale "Mage, Cleric, Ranger, and Arcane Trickster (L5+)" enumeration in
!cast/!spells learn/!prepare error paths with class-aware route hints via a new
spellRouteHintFor() helper.
R15: Removed the duplicate hand-authored healing_word_spell entry; Cleric default now
references the canonical SRD healing_word (cleric/druid/bard tagged). parseSpell
and lookupSpell now resolve "healing word" deterministically.
R16: !cast --drop now appends "(slot refunded)" when applicable.
R17: Prep-cap message rewritten to "Your prepared list is full (N/N)."
R19: Removed shillelagh from Druid default — the overlay flags it cleric/ranger only and
it has no real attack profile yet (BuffSelf, no DamageDice).
Bonus correctness: dndSpellRegistry now unions Classes on overlay collision instead of
replacing wholesale. The hand-authored buildSpellList() entries were tagged Mage-only,
so every Sorcerer/Warlock/Bard/Druid spell that collided with the SRD silently lost its
class list — meaning auto-granted defaults were rejected at the classOK gate. Union
merge restores SRD coverage without forcing a hand-edit of every overlay entry.
Tests:
- TestDefaultKnownSpellsHaveNoReactions covers B2.
- TestDefaultKnownSpellsAreCastableByClass guards the overlay-narrow regression.
- TestHealingWordResolvesDeterministically covers R15.
- TestCastNonCasterErrorHasNoClassEnumeration covers B3.
- Existing dnd_prepare_test.go updated to reference healing_word.
