Roll dice for tabletop RPG mechanics

Roll dice for tabletop RPG mechanics with JSON output

Resolving skill checks, attack rolls, damage, initiative, and saving throws in tabletop RPG adventures with deterministic outcomes.

• · Dice expression: 1d20, 2d6+3, 3d8-2, 4dF, d100

• · JSON: {expression, rolls[], modifier, total}
• · Narrative outcome tied to mechanical result

• · roll.sh script (bash)

• · RPG rules system defined (indicated by System.md or adventure context)
• · Dice expression valid (NdM±offset, supports Fudge dice)

• · Invalid expression syntax → script returns error
• · Outcome narration missing → mechanical result only (loses narrative flow)
• · GM forgets to roll for hidden checks → results are public (reroll and narrate as retroactive)

• · Deterministic execution (same seed = same result if needed)
• · Supports standard dice pools and Fudge dice
• · JSON output for programmatic use
• · Narrative coupling: outcomes tied to story consequences