- New spec at docs/specs/attunements/invoker/systems/invocation-system-spec.md
- Invocation Charge meter (0-100) fills passively, drains while invoking
- Channeled guardian auto-casts spells from their elements at reduced cost
- Spell selection picks best affordable spell, steps down as mana depletes
- No guardian swap mid-invocation; ends when charge depleted or room cleared
- Pact Affinity extended with diminishing-returns cast speed bonus (max 50%)
- New guardian-invocation discipline with 4 perks (efficiency, speed, sustain, mastery)
- Remove isConversionDiscipline guard in discipline-slice.ts:processTick
that was skipping mana drain for all 24 conversion disciplines
- Update test to verify conversion disciplines DO drain mana
- Add regression tests for auto-pause and XP accrual on conversion disciplines
- Fix misleading comments in elemental-regen.ts and elemental-regen-advanced.ts
All 1196 tests pass.