MODIFIED Requirements

Requirement: Supported character glyphs SHALL use scoped facing state

The presentation SHALL maintain horizontal facing per entity ID as visual state separate from simulation coordinates. The built-in MIAU 🐈 SHALL have native left-facing direction, including when a pack repeats that same glyph as a plain palette string. A mod palette object MAY declare faces: 'left' | 'right' for another profile glyph; a different plain string and a front-facing glyph such as FENN 🦊 SHALL remain non-directional by default. Every accepted horizontal displacement SHALL update a directional entity's facing to its travel direction, including being pushed. When a pushed entity also moves itself horizontally in the same turn, its self-movement direction SHALL take precedence. Vertical movement, transformation, idle frames, and blocked intents SHALL preserve prior horizontal facing. Undo SHALL restore per-ID facing history, while loading or resetting a level SHALL use its native declared or neutral facing. A facing change MAY use a glyph-only squash; reduced motion SHALL apply the direction immediately.

Scenario: Built-in cat faces forward in every pack

• WHEN a MIAU entity with the built-in 🐈 glyph moves right in a core proof or a pack with palette.MIAU: '🐈'
• THEN the settled board mirrors the native-left glyph to face right, without mirroring its cell, shadow, or text

Scenario: Leftward travel uses the native pose

• WHEN that MIAU entity subsequently moves left
• THEN the settled board draws the native-left glyph without a mirror

Scenario: Pushes turn a directional actor

• WHEN a directional entity is successfully pushed one cell to the right
• THEN its settled horizontal facing is right, while a blocked push leaves its prior facing unchanged

Scenario: Self-movement wins after a push

• WHEN one accepted turn pushes an actor right and then moves that actor left under an automaton rule
• THEN the actor's settled horizontal facing is left

Scenario: Vertical movement preserves the horizontal pose

• WHEN a MIAU entity moves up or down after facing right
• THEN its horizontal glyph orientation remains right because the side-profile emoji has no vertical view

Scenario: A transformation preserves per-ID facing

• WHEN an entity transforms to another noun during a settled turn
• THEN the entity ID retains its prior horizontal facing, unless the resulting noun has no directional glyph and uses its normal fallback

Scenario: A custom mod glyph opts in explicitly

• WHEN a mod supplies a different profile glyph with faces: 'right'
• THEN leftward travel mirrors that glyph, while a different plain-string glyph is not mirrored

Scenario: Undo and reset restore the correct pose

• WHEN the player undoes a directional turn or resets/loads a level
• THEN Undo restores the prior per-ID facing, and reset/load returns MIAU to the declared native-left pose

Scenario: Reduced motion skips facing animation

• WHEN reduced motion is enabled and a horizontal move changes facing
• THEN the settled glyph faces its direction immediately without a transitional squash