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

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487 open issues indexed

Test Cards aren't being properly filtered out Open

keep

Card-Forge/forge#5535 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Update forge.command according to forge.sh Open

Desktop GUI keep

Card-Forge/forge#5548 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
The likely consequences of not paying an UnlessCost$ aren't consistently displayed on the Prompt, and usually not displayed at all. Open

Game Mechanics GUI keep StackDesc

Card-Forge/forge#5573 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AI counts MDFC lands only as lands Open

AI keep

Card-Forge/forge#5603 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI activates some activated abilities as soon as it can with no reason Open

AI keep

Card-Forge/forge#5604 · 13 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Spells/abilities are incorrectly displayed on the stack Open

GUI keep StackDesc

Card-Forge/forge#5634 · 8 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
ChangesZoneAll currently doesn't have `ExcludedDestinations` yet, would that be better? Open

keep Low priority

Card-Forge/forge#5635 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Possible bug with Omo's everything counter and creature lands Open

keep

Card-Forge/forge#5636 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Dependency Layers Meta Issue Open

Game Mechanics keep

Card-Forge/forge#5642 · 34 comments · 0 reactions · 3 assignees · Indexed Sep 15, 2026
Two-Headed Giant Variant Open

Game Mechanics keep

Card-Forge/forge#5683 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Feature: try to use Threading Open

Game Mechanics keep

Card-Forge/forge#5692 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AI is trying to get the player to sacrifice his permanents even if it's impossible to do so Open

AI keep

Card-Forge/forge#5860 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
CantPutCounter + new simultaneous ETB Open

Game Mechanics keep

Card-Forge/forge#5864 · 0 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
Refactor MayFlashCost and MayFlashSac into StaticAbilities Open

Game Mechanics keep

Card-Forge/forge#5872 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI ignores the effect of Roiling Vortex and casts free spells Open

AI keep

Card-Forge/forge#5879 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI doesn't cast Suspend spells with As Foretold when it has mana open for Suspend Open

AI keep

Card-Forge/forge#5890 · 11 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
AI uses insta-fliсker on Grief when player hasn't cards in hands Open

AI keep

Card-Forge/forge#5891 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AI casts Surgical Extraction and chooses the most expensive card from both graveyards Open

AI Game Mechanics keep

Card-Forge/forge#5892 · 11 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI chooses a first (usual weaker) trigger when casting Tishana's Tidebinder/Consign to Memory Open

AI keep

Card-Forge/forge#5894 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI chooses a single target with a higher cmc for two different Pithing Needles Open

AI keep

Card-Forge/forge#5896 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI doesn't cast Invert Polarity Open

AI keep

Card-Forge/forge#5897 · 4 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI doesn't use second ability of Guide of Souls Open

AI Game Mechanics keep

Card-Forge/forge#5901 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI doesn't activate ability of Unstable Amulet Open

AI Game Mechanics keep

Card-Forge/forge#5904 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Inconsistent plurals for costs in in-game card text display Open

GUI keep

Card-Forge/forge#5916 · 1 comment · 0 reactions · 2 assignees · Indexed Sep 15, 2026
AI doesn't activate Channel abilities that don't deal damage Open

AI keep

Card-Forge/forge#5935 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Siege Modification - Does Not Work In Tandem With Captain Rex Nebula Open

BUG Game Mechanics keep

Card-Forge/forge#5936 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AI doesn't cast Calibrated Blast if the player gets hexproof/shroud from his creature Open

AI keep

Card-Forge/forge#5940 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
RestartGameEffect using initVariantsZones creates duplicate cards Open

BUG Game Mechanics keep

Card-Forge/forge#5943 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Replacements don't appear to work in Bloomburrow packs Open

keep

Card-Forge/forge#5965 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AttackRestriction should be moved to StaticAbilityCantAttackBlock Open

Game Mechanics keep

Card-Forge/forge#6000 · 8 comments · 0 reactions · 3 assignees · Indexed Sep 15, 2026
Can't Untap effects needs to be rewritten Open

Game Mechanics keep

Card-Forge/forge#6011 · 6 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
AI doesn't cast Skullcrack while the player has more than 10 hp Open

AI keep

Card-Forge/forge#6015 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI puts the same Urza's lands on the battlefield even if it has different ones in its hands Open

AI keep

Card-Forge/forge#6031 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AI casts Stony Silence instead of Suppression Field when player has non-artifact permanents with activated abilities Open

AI keep

Card-Forge/forge#6105 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Damping Sphere breaks autopay for painlands Open

AI BUG Game Mechanics keep

Card-Forge/forge#6107 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AI doesn't activate first ability of The Underworld Cookbook Open

AI keep

Card-Forge/forge#6108 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Issue with Currency Converter remembering the discarded card when it shouldn't Open

BUG Game Mechanics keep

Card-Forge/forge#6135 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Permanent blanket effects massively slow down AI response time Open

AI Game Mechanics keep

Card-Forge/forge#6149 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Update Morph and Manifest card images to function like other token images Open

GUI keep

Card-Forge/forge#6172 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Sin Prodder forever 'Waiting for opponent...' Open

AI BUG keep

Card-Forge/forge#6236 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Aminatou, Veil Piercer Does Not Correctly Reduce Room Costs Open

BUG Game Mechanics keep

Card-Forge/forge#6372 · 5 comments · 0 reactions · 2 assignees · Indexed Sep 15, 2026
AI pays energy counter to keep Static Prison without exiled permanent Open

AI keep

Card-Forge/forge#6380 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AI cheating on Guardian of the Great Door. Open

AI keep

Card-Forge/forge#6383 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Cloned Grothama triggering improperly Open

BUG keep

Card-Forge/forge#6389 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
AI untaps Sleep-Cursed Faerie in response to any player action Open

AI keep

Card-Forge/forge#6391 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
extend Room AI Open

AI Game Mechanics keep

Card-Forge/forge#6397 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Issue with Captain America, First Avenger Open

Enhancement Game Mechanics keep

Card-Forge/forge#6398 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Potential bug with Deadly Brew Open

BUG Game Mechanics keep

Card-Forge/forge#6413 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Gleemox showing up as legal in EDH Open

keep

Card-Forge/forge#6562 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Keyboard shortcut for showing flipside of card Open

GUI keep

Card-Forge/forge#6569 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026

Card-Forge/forge

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