Card-Forge/forge

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An unofficial rules engine for the world's greatest card game.

Stars: 2.7k
Forks: 1.1k
Open beginner issues: 0
Indexed issues: 489
Avg merge: 22h 36m
Merged PRs (30d): 168

Dominant language: Java
License: GPL-3.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Open All

487 open issues indexed

bug: cancelled foretell card is no longer foretold Open

Experimental Restore Game Mechanics keep

Card-Forge/forge#7844 · 6 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
SVar log spam about Any/Double/Result/Triple Open

AI Game Mechanics keep

Card-Forge/forge#7934 · 6 comments · 0 reactions · 3 assignees · Indexed Sep 15, 2026
Update Wiki Open

Adventure Documentation keep Low priority

Card-Forge/forge#8059 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Rework deckbuilding rules into a set of objects Open

Card Cleanup Enhancement keep

Card-Forge/forge#8066 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Modularize Custom Editions Open

Enhancement keep Low priority

Card-Forge/forge#8126 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Planar Conquest] When the player wins, the "loss" sound effect is played Open

BUG Game Mechanics keep

Card-Forge/forge#8132 · 9 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
[Android] [Bug] When AI opponent targeted my creature with « Hall Monitor »'s ability, "hidden cardname" was added in the description of its effect Open

Card Cleanup keep

Card-Forge/forge#8137 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI doesn't understand CanAttackDefender Effects Open

AI Game Mechanics keep

Card-Forge/forge#8172 · 0 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
AI System Tests: Targeting vs Ward creatures Open

AI keep Low priority Test

Card-Forge/forge#8239 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
"Must Be Blocked If Able" incorrectly interacts with evasion Open

AI Game Mechanics keep

Card-Forge/forge#8244 · 3 comments · 0 reactions · 3 assignees · Indexed Sep 15, 2026
Support switching AI profile via Deck file Open

AI keep

Card-Forge/forge#8268 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Link Puzzle Mode with Adventure Open

Adventure keep

Card-Forge/forge#8269 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support multiplayer in Adventure Open

Adventure keep

Card-Forge/forge#8271 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
High-level TODOs for AI simulation code Open

AI keep

Card-Forge/forge#8273 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
AI searches library while opponent controls Ob Nixilis, Unshackled Open

keep

Card-Forge/forge#8346 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Ability word visible in GUI Open

Game Mechanics GUI keep

Card-Forge/forge#8354 · 2 comments · 0 reactions · 5 assignees · Indexed Sep 15, 2026
YEOE: CounterTypeRemovedAll Open

Game Mechanics keep Upcoming Set

Card-Forge/forge#8447 · 1 comment · 0 reactions · 2 assignees · Indexed Sep 15, 2026
AI with ChangeZone and Never on Ambrosia Whiteheart Open

AI Game Mechanics keep

Card-Forge/forge#8456 · 3 comments · 0 reactions · 3 assignees · Indexed Sep 15, 2026
Professor Hojo LKI Open

keep Rules compliance

Card-Forge/forge#8468 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AI targets my creature with Constellation on Harvestguard Alseids Open

AI Game Mechanics keep

Card-Forge/forge#8479 · 3 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Dual land color selection could be better when color is obvious Open

AI GUI keep

Card-Forge/forge#8494 · 1 comment · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Forge could handle "xxxxxxx you control attack each combat if able" Open

Game Mechanics keep

Card-Forge/forge#8514 · 4 comments · 0 reactions · 3 assignees · Indexed Sep 15, 2026
Mana Vault - Don't default to Paying 4 if already untapped Open

GUI keep Low priority QOL

Card-Forge/forge#8516 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support new timestamp rule Open

Game Mechanics keep Rules compliance

Card-Forge/forge#8562 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Consider more cards playable in main1 Open

keep

Card-Forge/forge#8589 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
CanBlockAny adds an additional card text line. Open

Game Mechanics GUI keep

Card-Forge/forge#8611 · 2 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
CantBeTargetedBy: Unify Logic with Message Open

Game Mechanics GUI keep

Card-Forge/forge#8646 · 2 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
AI gets stuck in infinite loop casting Karmic Guide if Elesh Norn, Grand Cenobite is in play Open

AI Game Mechanics keep

Card-Forge/forge#8647 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Property Cleanup Meta Open

Game Mechanics keep

Card-Forge/forge#8670 · 2 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Yavimaya Cradle of Growth and similar cards slow down the passing of turns in multiplayer Open

AI BUG keep

Card-Forge/forge#8675 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
'As Foretold' allow morphs to be casted from graveyards Open

AI Game Mechanics keep

Card-Forge/forge#8679 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Similfy MagicColor stuff Open

Game Mechanics GUI keep

Card-Forge/forge#8682 · 14 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
Cleanup some ProtectEffect Code Open

Game Mechanics GUI keep

Card-Forge/forge#8692 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Zur curses himself with Stuck in Summoner's Sanctum Open

AI Game Mechanics keep

Card-Forge/forge#8702 · 2 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Emblazoned Golem check Open

BUG Game Mechanics keep

Card-Forge/forge#8713 · 1 comment · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Translatable Enums Meta Open

Game Mechanics GUI keep

Card-Forge/forge#8716 · 18 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Put Edition files in a .zip archive; add version checking to zipped resources Open

keep Low priority QOL

Card-Forge/forge#8718 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Visible Manifestations Open

AI BUG Game Mechanics keep

Card-Forge/forge#8733 · 8 comments · 0 reactions · 3 assignees · Indexed Sep 15, 2026
Canceling casts sometimes freezes the game Open

BUG Experimental Restore Game Mechanics keep

Card-Forge/forge#8762 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Spider-Man 2099 Ability Won't Activate Open

BUG Game Mechanics keep

Card-Forge/forge#8778 · 3 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Better Ai for CounterPutEffect Targets Open

AI Game Mechanics keep

Card-Forge/forge#8783 · 2 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Autotap taps more than necessary Open

AI Game Mechanics keep

Card-Forge/forge#8784 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
AI always gives Cheering Crowd the +1/+1 counter Open

AI keep

Card-Forge/forge#8813 · 0 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
Scripts with StoreSVar break on copies Open

Game Mechanics keep

Card-Forge/forge#8831 · 7 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
New deck lost Open

Deck Editor Desktop keep

Card-Forge/forge#8845 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Auras that become Equipment while losing their other types are likely to not grant abilities to "enchanted" creature as expected Open

keep Rules compliance

Card-Forge/forge#8891 · 5 comments · 0 reactions · 4 assignees · Indexed Sep 15, 2026
AI "failed to target" when casting Torrent of Souls Open

AI Game Mechanics keep

Card-Forge/forge#8905 · 2 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Trigger Warning: AI (Artificial Ignoramus) Open

AI keep

Card-Forge/forge#8906 · 2 comments · 1 reaction · 2 assignees · Indexed Sep 15, 2026
Allow for six player games and Emperor format Open

Game Mechanics keep

Card-Forge/forge#8912 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Gatherer Split Unfinity Edition Open

Format Changes keep Un-Cards

Card-Forge/forge#8917 · 9 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026

Card-Forge/forge

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