[E-PF2E-3] Fortune/Misfortune and Hero Point reroll

[alxjrvs]

Part of #942

Phase 3: Fortune/Misfortune and Hero Point reroll

Updated 2026-03-24: Game packages now use .randsum.json specs + codegen. This extends the PF2e spec from Phases 1-2.

Scope

Extend the PF2e spec to support fortune, misfortune, and hero point reroll — all of which involve rolling twice and taking the higher or lower result.

Acceptance Criteria

• fortune: true — rolls twice, takes the higher d20 result before degree calculation
• misfortune: true — rolls twice, takes the lower d20 result
• heroPoint: true — rerolls; takes the reroll if higher, otherwise keeps original
• Fortune and misfortune are mutually exclusive — spec validation rejects both being true
• Natural 1/20 degree shift applies to the kept roll, not the discarded roll
• MAP from Phase 2 applies to both rolls when combined
• Result includes both kept and discarded roll values
• Depends on Phase 1 ([E-PF2E-1] Core roll and degrees of success #966)

Mechanics Reference

• Fortune: take higher of two d20 rolls
• Misfortune: take lower of two d20 rolls
• Hero point: reroll; keep if higher than original
• Mutual exclusion: fortune + misfortune is invalid input

Out of Scope

• Incapacitation trait
• Persistent roll state