Decision records

Each record explains one design choice: the context, the decision, the Comprehensive Rules (and PGN sections) that led to it, the alternatives rejected, and the consequences. Records are numbered in the order they were made. A later record can amend an earlier one; the earlier record's status says so.

To propose a new decision, see CONTRIBUTING.md.

#	Decision	Status
0001	Point of view	Accepted
0002	Card identity	Accepted. Item 4 clarified by decision 0024 (links between objects end on zone changes).
0003	Ability identity	Accepted
0004	Causality	Accepted
0005	Choices and costs	Accepted
0006	Mana	Accepted
0007	Stack and priority	Accepted. Item 3 amended by decision 0016 (priority lines required only while the stack is not empty).
0008	Keyframes	Accepted. Item 1 extended by decision 0016 (a keyframe also starts the pregame) and decision 0026 (keyframes list lasting effects).
0009	Timestamps and clocks	Accepted. Item 2 amended by decision 0012.
0010	Multi-game matches	Accepted. Item 1 amended by decision 0012.
0011	Extensions and annotations	Accepted. Item 1 amended by decision 0012 (tag names use PREFIX_Name). Item 8 amended by decision 0016 (glyphs are written as NAGs).
0012	File structure and tag roster	Accepted. Amends decisions 0009, 0010, and 0011.
0013	One canonical format	Accepted
0014	Variations	Accepted
0015	Lexical rules	Accepted
0016	Event line syntax	Accepted. Amends decisions 0007 (item 3), 0008 (item 1), and 0011 (item 8). Item 9 amended by decision 0019 (applies to hands only).
0017	Entering tapped, replacement order, fizzle causes, and choosers	Accepted. Item 1 extended by decision 0021 (tokens, attacking).
0018	Opening hand actions and replacement effects	Accepted
0019	Corrections from the first rules review	Accepted. Amends decision 0016 (item 9).
0020	Stack removal, rule causes, and other review gaps	Accepted
0021	Entering the battlefield tapped or attacking	Accepted. Extends decision 0017 (item 1).
0022	Faces and halves of cards	Accepted
0023	Copies	Accepted
0024	Links between objects end on zone changes	Accepted. Clarifies decision 0002 (item 4).
0025	Special actions	Accepted
0026	Lasting effects and designations	Accepted. Amends decision 0008 (keyframes include lasting effects). Item 6 amended by decision 0027 (power and toughness are recorded).
0027	Power and toughness	Accepted. Amends decision 0026 (item 6).
0028	Archetypes	Accepted
0029	Companions	Accepted. Clarifies decisions 0010 (item 3) and 0025.
0030	Delayed triggers created by actions	Accepted. Extends decision 0026.
0031	Cost changes	Accepted
0032	Corrections from the second rules review	Accepted. Corrects decisions 0026, 0028, 0030, and 0031.
0033	Hybrid and Phyrexian mana	Accepted. Amends decision 0031 (item 6).
0034	Delve, convoke, and improvise	Accepted. Amends decision 0024.
0035	Fuse	Accepted
0036	Casting without paying the mana cost	Accepted. Settles the open question from decision 0031.
0037	Validation	Accepted. Extends decision 0008.
0038	Copies of spells and repeated costs	Accepted. Extends decision 0023.