McRogueFace/docs/api-audit-2026-04.md

McRogueFace Python API Consistency Audit

Date: 2026-04-09 Version: 0.2.6-prerelease Purpose: Catalog the full public API surface, identify inconsistencies and issues before 1.0 API freeze.

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Table of Contents

1. Executive Summary
2. Module-Level API
3. Core Value Types
4. UI Drawable Types
5. Grid System
6. Entity System
7. Collections
8. Audio Types
9. Procedural Generation
10. Pathfinding
11. Shader System
12. Tiled/LDtk Import
13. 3D/Experimental Types
14. Enums
15. Findings: Naming Inconsistencies
16. Findings: Missing Functionality
17. Findings: Deprecations to Resolve
18. Findings: Documentation Gaps
19. Recommendations

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Executive Summary

The McRogueFace Python API exposes 46 exported types, 14 internal types, 10 enums, 13 module-level functions, 7 module-level properties, and 5 singleton instances through the mcrfpy module.

Overall, the API is remarkably consistent. Properties and methods use snake_case throughout the type system. The major inconsistencies are concentrated in a few areas:

1. 4 module-level functions use camelCase (setScale, findAll, getMetrics, setDevConsole)
2. Terse/placeholder docstrings on 5 core types (Vector, Font, Texture, GridPoint, GridPointState)
3. Deprecated property aliases still exposed (sprite_number)
4. Color property naming split: some types use fill_color/outline_color, others use color
5. Redundant position aliases on Entity (grid_pos vs cell_pos for the same data)

---

Module-Level API

Functions (mcrfpy.*)

Function	Signature	Notes
step	(dt: float = None) -> float	Advance simulation (headless mode)
exit	() -> None	Shutdown engine
find	(name: str, scene: str = None) -> Drawable | None	Find UI element by name
lock	() -> _LockContext	Thread-safe UI update context manager
bresenham	(start, end, *, include_start=True, include_end=True) -> list[tuple]	Line algorithm
start_benchmark	() -> None	Begin benchmark capture
end_benchmark	() -> str	End benchmark, return filename
log_benchmark	(message: str) -> None	Add benchmark annotation
_sync_storage	() -> None	WASM persistent storage flush
setScale	(multiplier: float) -> None	CAMELCASE - deprecated
findAll	(pattern: str, scene: str = None) -> list	CAMELCASE
getMetrics	() -> dict	CAMELCASE
setDevConsole	(enabled: bool) -> None	CAMELCASE

Properties (mcrfpy.*)

Property	Type	Writable	Notes
current_scene	Scene | None	Yes	Active scene
scenes	dict[str, Scene]	No	All registered scenes
timers	list[Timer]	No	Active timers
animations	list[Animation]	No	Active animations
default_transition	Transition	Yes	Scene transition effect
default_transition_duration	float	Yes	Transition duration
save_dir	str	No	Platform-specific save path

Singletons

Name	Type	Notes
keyboard	Keyboard	Modifier key state
mouse	Mouse	Position and button state
window	Window	Window properties
default_font	Font	JetBrains Mono
default_texture	Texture	Kenney Tiny Dungeon (16x16)

Constants

Name	Type	Value
__version__	str	Build version string
default_fov	FOV	FOV.BASIC

Submodules

Name	Contents
automation	Screenshot, click simulation, testing utilities

---

Core Value Types

Color

Color(r: int = 0, g: int = 0, b: int = 0, a: int = 255)

Properties	Type	R/W
r, g, b, a	int (0-255)	R/W

Methods	Signature
from_hex	(cls, hex_string: str) -> Color (classmethod)
to_hex	() -> str
lerp	(other: Color, t: float) -> Color

Protocols: __repr__, __hash__

Vector

Vector(x: float = 0, y: float = 0)

Properties	Type	R/W
x, y	float	R/W
int	tuple[int, int]	R

Methods	Signature
magnitude	() -> float
magnitude_squared	() -> float
normalize	() -> Vector
dot	(other: Vector) -> float
distance_to	(other: Vector) -> float
angle	() -> float
copy	() -> Vector
floor	() -> Vector

Protocols: __repr__, __hash__, __eq__/__ne__, arithmetic (+, -, *, /, -x, abs), sequence (len, [0]/[1])

Font

Font(filename: str)

Properties	Type	R/W
family	str	R
source	str	R

Methods: None Protocols: __repr__

Texture

Texture(filename: str, sprite_width: int, sprite_height: int)

Properties	Type	R/W
sprite_width, sprite_height	int	R
sheet_width, sheet_height	int	R
sprite_count	int	R
source	str	R

Methods	Signature
from_bytes	(cls, data, w, h, sprite_w, sprite_h, name=...) -> Texture (classmethod)
composite	(cls, layers, sprite_w, sprite_h, name=...) -> Texture (classmethod)
hsl_shift	(hue_shift, sat_shift=0, lit_shift=0) -> Texture

Protocols: __repr__, __hash__

---

UI Drawable Types

Base: Drawable (abstract)

Cannot be instantiated directly.

Properties	Type	R/W	Notes
on_click	callable	R/W	(pos, button, action)
z_index	int	R/W	Render order
visible	bool	R/W
opacity	float	R/W	0.0-1.0
name	str	R/W
pos	Vector	R/W
parent	Drawable	R
align	Alignment	R/W
margin, horiz_margin, vert_margin	float	R/W
shader	Shader	R/W
uniforms	UniformCollection	R
rotation	float	R/W
origin	Vector	R/W

Methods	Signature
move	(dx, dy) or (delta)
resize	(w, h) or (size)
animate	(property, target, duration, easing, ...)

Frame

Frame(pos=None, size=None, **kwargs)

Additional properties beyond Drawable:

Properties	Type	R/W
x, y, w, h	float	R/W
fill_color	Color	R/W
outline_color	Color	R/W
outline	float	R/W
children	UICollection	R
clip_children	bool	R/W
cache_subtree	bool	R/W
grid_pos, grid_size	Vector	R/W

Caption

Caption(pos=None, font=None, text='', **kwargs)

Additional properties beyond Drawable:

Properties	Type	R/W
x, y	float	R/W
w, h	float	R (computed)
size	Vector	R (computed)
text	str	R/W
font_size	float	R/W
fill_color	Color	R/W
outline_color	Color	R/W
outline	float	R/W

Sprite

Sprite(pos=None, texture=None, sprite_index=0, **kwargs)

Additional properties beyond Drawable:

Properties	Type	R/W	Notes
x, y	float	R/W
w, h	float	R (computed)
scale	float	R/W	Uniform scale
scale_x, scale_y	float	R/W	Per-axis scale
sprite_index	int	R/W
sprite_number	int	R/W	DEPRECATED alias
texture	Texture	R/W

Line

Line(start=None, end=None, thickness=1.0, color=None, **kwargs)

Properties	Type	R/W	Notes
start	Vector	R/W
end	Vector	R/W
color	Color	R/W	Not fill_color
thickness	float	R/W

Circle

Circle(radius=0, center=None, fill_color=None, outline_color=None, outline=0, **kwargs)

Properties	Type	R/W
radius	float	R/W
center	Vector	R/W
fill_color	Color	R/W
outline_color	Color	R/W
outline	float	R/W

Arc

Arc(center=None, radius=0, start_angle=0, end_angle=90, color=None, thickness=1, **kwargs)

Properties	Type	R/W	Notes
center	Vector	R/W
radius	float	R/W
start_angle, end_angle	float	R/W	Degrees
color	Color	R/W	Not fill_color
thickness	float	R/W

---

Grid System

Grid (also available as GridView)

Grid(grid_size=None, pos=None, size=None, texture=None, **kwargs)

Properties	Type	R/W	Notes
grid_size, grid_w, grid_h	tuple/int	R
x, y, w, h	float	R/W
pos, position	Vector	R/W	position is redundant alias
center	Vector	R/W	Camera center (pixels)
center_x, center_y	float	R/W
zoom	float	R/W
camera_rotation	float	R/W
fill_color	Color	R/W
texture	Texture	R
entities	EntityCollection	R
children	UICollection	R
layers	tuple	R
perspective, perspective_enabled	various	R/W
fov, fov_radius	various	R/W
on_cell_enter, on_cell_exit, on_cell_click	callable	R/W
hovered_cell	tuple	R
grid_data	_GridData	R/W	Internal grid reference

Methods	Signature
at	(x, y) or (pos) -> GridPoint
compute_fov	(pos, radius, light_walls, algorithm)
is_in_fov	(pos) -> bool
find_path	(start, end, diagonal_cost, collide) -> AStarPath
get_dijkstra_map	(root, diagonal_cost, collide) -> DijkstraMap
clear_dijkstra_maps	()
add_layer	(layer)
remove_layer	(name_or_layer)
layer	(name) -> ColorLayer | TileLayer
entities_in_radius	(pos, radius) -> list
center_camera	(pos) -- tile coordinates
apply_threshold	(source, range, walkable, transparent)
apply_ranges	(source, ranges)
step	(n, turn_order) -- turn management

GridPoint (internal, returned by Grid.at())

Properties	Type	R/W
walkable	bool	R/W
transparent	bool	R/W
entities	list	R
grid_pos	tuple	R

Dynamic attributes: named layer data via __getattr__/__setattr__

GridPointState (internal, returned by entity gridstate)

Properties	Type	R/W
visible	bool	R/W
discovered	bool	R/W
point	GridPoint	R

ColorLayer

ColorLayer(z_index=-1, name=None, grid_size=None)

Properties	Type	R/W
z_index	int	R/W
visible	bool	R/W
grid_size	tuple	R
name	str	R
grid	Grid	R/W

Methods	Signature
at	(x, y) or (pos) -> Color
set	(pos, color)
fill	(color)
fill_rect	(pos, size, color)
draw_fov	(source, radius, fov, visible, discovered, unknown)
apply_perspective	(entity, visible, discovered, unknown)
update_perspective	()
clear_perspective	()
apply_threshold	(source, range, color)
apply_gradient	(source, range, color_low, color_high)
apply_ranges	(source, ranges)

TileLayer

TileLayer(z_index=-1, name=None, texture=None, grid_size=None)

Properties	Type	R/W
z_index	int	R/W
visible	bool	R/W
texture	Texture	R/W
grid_size	tuple	R
name	str	R
grid	Grid	R/W

Methods	Signature
at	(x, y) or (pos) -> int
set	(pos, index)
fill	(index)
fill_rect	(pos, size, index)
apply_threshold	(source, range, tile)
apply_ranges	(source, ranges)

---

Entity System

Entity

Entity(grid_pos=None, texture=None, sprite_index=0, **kwargs)

Properties	Type	R/W	Notes
pos, x, y	Vector/float	R/W	Pixel position
cell_pos, cell_x, cell_y	Vector/int	R/W	Integer cell coords
grid_pos, grid_x, grid_y	Vector/int	R/W	Same as cell_pos
draw_pos	Vector	R/W	Fractional tile position
sprite_index	int	R/W
sprite_number	int	R/W	DEPRECATED alias
sprite_offset, sprite_offset_x, sprite_offset_y	Vector/float	R/W
grid	Grid	R/W
gridstate	GridPointState	R
labels	frozenset	R/W
step	callable	R/W	Turn callback
default_behavior	Behavior	R/W
behavior_type	Behavior	R
turn_order	int	R/W
move_speed	float	R/W
target_label	str	R/W
sight_radius	int	R/W
visible, opacity, name	various	R/W
shader, uniforms	various	R/W

Methods	Signature
at	(x, y) or (pos) -> GridPoint
index	() -> int
die	()
path_to	(x, y) or (target) -> AStarPath
find_path	(target, diagonal_cost, collide) -> AStarPath
update_visibility	()
visible_entities	(fov, radius) -> list
animate	(property, target, duration, easing, ...)

---

Collections

UICollection (internal, returned by Frame.children / Scene.children)

Methods	Signature
append	(element)
extend	(iterable)
insert	(index, element)
remove	(element)
pop	([index]) -> Drawable
index	(element) -> int
count	(element) -> int
find	(name, recursive=False) -> Drawable | None

Protocols: len, [], slicing, iteration

EntityCollection (internal, returned by Grid.entities)

Same methods as UICollection. Protocols: len, [], slicing, iteration.

---

Audio Types

Sound

Sound(source: str | SoundBuffer)

Properties	Type	R/W
volume	float (0-100)	R/W
loop	bool	R/W
playing	bool	R
duration	float	R
source	str	R
pitch	float	R/W
buffer	SoundBuffer	R

Methods	Signature
play	()
pause	()
stop	()
play_varied	(pitch_range=0.1, volume_range=3.0)

SoundBuffer

SoundBuffer(filename: str)

Properties	Type	R/W
duration	float	R
sample_count	int	R
sample_rate	int	R
channels	int	R
sfxr_params	dict	R

Methods	Signature	Notes
from_samples	(cls, data, channels, sample_rate) -> SoundBuffer	classmethod
tone	(cls, frequency, duration, waveform='sine', ...) -> SoundBuffer	classmethod
sfxr	(cls, preset, seed=None) -> SoundBuffer	classmethod
concat	(cls, buffers) -> SoundBuffer	classmethod
mix	(cls, buffers) -> SoundBuffer	classmethod
pitch_shift	(semitones) -> SoundBuffer	returns new
low_pass	(cutoff) -> SoundBuffer	returns new
high_pass	(cutoff) -> SoundBuffer	returns new
echo	(delay, decay) -> SoundBuffer	returns new
reverb	(room_size) -> SoundBuffer	returns new
distortion	(gain) -> SoundBuffer	returns new
bit_crush	(bits) -> SoundBuffer	returns new
gain	(amount) -> SoundBuffer	returns new
normalize	() -> SoundBuffer	returns new
reverse	() -> SoundBuffer	returns new
slice	(start, end) -> SoundBuffer	returns new
sfxr_mutate	(amount) -> SoundBuffer	returns new

Music

Music(filename: str)

Properties	Type	R/W
volume	float (0-100)	R/W
loop	bool	R/W
playing	bool	R
duration	float	R
position	float	R/W
source	str	R

Methods	Signature
play	()
pause	()
stop	()

---

Procedural Generation

HeightMap

HeightMap(size: tuple[int, int], fill: float = 0.0)

Properties	Type	R/W
size	tuple	R

46 methods covering: fill/clear, get/set (via []), math operations, noise, erosion, BSP integration, kernel operations, binary operations.

Protocols: [x, y] subscript (get/set)

DiscreteMap

DiscreteMap(size: tuple[int, int], fill: int = 0, enum: type[IntEnum] = None)

Properties	Type	R/W
size	tuple	R
enum_type	type	R/W

22 methods covering: fill/clear, get/set (via []), math, bitwise, statistics, conversion.

Protocols: [x, y] subscript (get/set)

BSP

BSP(pos: tuple[int, int], size: tuple[int, int])

Properties	Type	R/W
bounds, pos, size	tuple	R
root	BSPNode	R
adjacency	BSPAdjacency	R

Methods	Signature
split_once	(...)
split_recursive	(...)
clear	()
leaves	() -> list[BSPNode]
traverse	(order) -> BSPIter
find	(pos) -> BSPNode
get_leaf	(index) -> BSPNode
to_heightmap	() -> HeightMap

NoiseSource

NoiseSource(dimensions=2, algorithm='simplex', hurst=0.5, lacunarity=2.0, seed=None)

Properties	Type	R/W
dimensions, algorithm, hurst, lacunarity, seed	various	R

Methods	Signature
get	(pos) -> float
fbm	(pos, octaves=4) -> float
turbulence	(pos, octaves=4) -> float
sample	(size, world_origin, world_size, mode, octaves) -> HeightMap

---

Pathfinding

AStarPath

Properties	Type	R/W
origin	tuple	R
destination	tuple	R
remaining	int	R

Methods	Signature
walk	() -> Vector
peek	() -> Vector

Protocols: len, bool, iteration

DijkstraMap

Properties	Type	R/W
root	tuple	R

Methods	Signature
distance	(pos) -> float | None
path_from	(pos) -> AStarPath
step_from	(pos) -> Vector | None
to_heightmap	(size=None, unreachable=-1.0) -> HeightMap

---

Shader System

Shader

Shader(fragment_source: str, dynamic: bool = False)

Properties	Type	R/W
dynamic	bool	R/W
source	str	R
is_valid	bool	R

Methods	Signature
set_uniform	(name: str, value: float | tuple)

PropertyBinding

PropertyBinding(target: Drawable, property: str)

Properties	Type	R/W
target	Drawable	R
property	str	R
value	float	R
is_valid	bool	R

CallableBinding

CallableBinding(callable: Callable[[], float])

Properties	Type	R/W
callable	callable	R
value	float	R
is_valid	bool	R

UniformCollection (internal, returned by drawable.uniforms)

Dict-like container. Supports [], del, in, keys(), values(), items(), clear().

---

Tiled/LDtk Import

TileSetFile

TileSetFile(path: str)

Properties (all R): name, tile_width, tile_height, tile_count, columns, margin, spacing, image_source, properties, wang_sets

Methods: to_texture(), tile_info(id), wang_set(name)

TileMapFile

TileMapFile(path: str)

Properties (all R): width, height, tile_width, tile_height, orientation, properties, tileset_count, tile_layer_names, object_layer_names

Methods: tileset(index), tile_layer_data(name), resolve_gid(gid), object_layer(name), apply_to_tile_layer(layer, name)

WangSet (factory-created from TileSetFile)

Properties (all R): name, type, color_count, colors

Methods: terrain_enum(), resolve(discrete_map), apply(discrete_map, tile_layer)

LdtkProject

LdtkProject(path: str)

Properties (all R): version, tileset_names, ruleset_names, level_names, enums

Methods: tileset(name), ruleset(name), level(name)

AutoRuleSet (factory-created from LdtkProject)

Properties (all R): name, grid_size, value_count, values, rule_count, group_count

Methods: terrain_enum(), resolve(discrete_map), apply(discrete_map, tile_layer)

---

3D/Experimental Types

These are exempt from the 1.0 API freeze per ROADMAP.md.

Viewport3D, Entity3D, EntityCollection3D, Model3D, Billboard, VoxelGrid, VoxelRegion, VoxelPoint, Camera3D (via Viewport3D properties).

---

Enums

Enum	Values	Notes
Key	42+ keyboard keys	Legacy string comparison (Key.ESCAPE == "Escape")
InputState	PRESSED, RELEASED	Legacy: "start", "end"
MouseButton	LEFT, RIGHT, MIDDLE, X1, X2	Legacy: "left", "right", "middle"
Easing	32 easing functions	Linear, Quad, Cubic, etc.
Transition	Scene transition effects
Traversal	BSP traversal orders
Alignment	9 positions + NONE	TOP_LEFT through BOTTOM_RIGHT
Behavior	11 entity behaviors	For grid.step() turn system
Trigger	3 trigger types	Entity step callbacks
FOV	FOV algorithms	Maps to libtcod

---

Findings: Naming Inconsistencies

F1: Module-level camelCase functions (CRITICAL)

Four module-level functions use camelCase while everything else uses snake_case:

Current	Should Be	Status
setScale	set_scale	Deprecated anyway (use Window.resolution)
findAll	find_all	Active, needs alias
getMetrics	get_metrics	Active, needs alias
setDevConsole	set_dev_console	Active, needs alias

Resolution: Add snake_case aliases. Keep camelCase temporarily for backward compatibility. Remove camelCase in 1.0.

F2: Color property naming split

Filled shapes (Frame, Caption, Circle) use fill_color/outline_color. Stroke-only shapes (Line, Arc) use color. This is actually semantically correct -- Line and Arc don't have a "fill" concept. No change needed, but worth documenting.

F3: Redundant Entity position aliases

Entity exposes the same cell position data under two names:

• grid_pos, grid_x, grid_y
• cell_pos, cell_x, cell_y

Both exist because grid_pos is the constructor parameter name and cell_pos is more descriptive. Recommendation: Keep both but document grid_pos as the canonical name (matches constructor).

F4: Grid position alias

Grid.position is a redundant alias for Grid.pos. All other types use only pos. Recommendation: Deprecate position, keep pos.

F5: Iterator type naming

• UICollectionIter -- has "UI" prefix
• UIEntityCollectionIter -- has "UI" prefix
• EntityCollection3DIter -- no "UI" prefix

The "UI" prefix is an internal detail leaking into type names. Since these are internal types (not exported), this is cosmetic but worth noting.

---

Findings: Missing Functionality

F6: No __eq__ on Color

Color has __hash__ but no __eq__/__ne__. Two colors with the same RGBA values may not compare equal. This is a bug.

F7: No Music.pitch

Sound has a pitch property but Music does not, despite SFML supporting it. Minor omission.

F8: No Font methods

Font has no methods at all -- not even a way to query available sizes or get text metrics. This limits text layout capabilities.

F9: GridPoint has no __init__

GridPoint cannot be constructed from Python (tp_new = NULL). This is intentional (it's a view into grid data) but should be clearly documented.

F10: Animation direct construction deprecated but not marked

The Animation class can still be instantiated directly even though .animate() on drawables is preferred. No deprecation warning is emitted.

---

Findings: Deprecations to Resolve

F11: sprite_number on Sprite and Entity

Both types expose sprite_number as a deprecated alias for sprite_index. This should be removed before 1.0.

F12: setScale module function

Deprecated in favor of Window.resolution. Should be removed before 1.0.

F13: Legacy string enum comparisons

Key, InputState, MouseButton support comparing to legacy string values (e.g., Key.ESCAPE == "Escape", InputState.PRESSED == "start"). This backward compatibility layer should be removed before 1.0.

---

Findings: Documentation Gaps

F14: Terse docstrings on core types

Several types have placeholder-quality tp_doc strings:

Type	Current tp_doc	Should be
Vector	"SFML Vector Object"	Full constructor docs with args
Font	"SFML Font Object"	Full constructor docs
Texture	"SFML Texture Object"	Full constructor docs
GridPoint	"UIGridPoint object"	Description of purpose and access pattern
GridPointState	"UIGridPointState object"	Description of purpose

F15: Missing MCRF_* macro usage

Some types use raw string docstrings for methods instead of MCRF_METHOD macros. This means the documentation pipeline may miss them.

---

Recommendations

Before 1.0 (Breaking Changes)

1. Remove camelCase functions: setScale, findAll, getMetrics, setDevConsole
2. Remove sprite_number deprecated alias from Sprite and Entity
3. Remove legacy string enum comparisons from Key, InputState, MouseButton
4. Remove Grid.position redundant alias (keep pos)
5. Add __eq__/__ne__ to Color type

Immediate (Non-Breaking)

1. Add snake_case aliases for the 4 camelCase module functions
2. Improve docstrings on Vector, Font, Texture, GridPoint, GridPointState
3. Document grid_pos vs cell_pos -- state that grid_pos is canonical

Future Considerations

1. Add pitch to Music
2. Add basic text metrics to Font
3. Consider deprecation warnings for Animation() direct construction
4. Unify iterator type naming (remove "UI" prefix from internal types)

---

Statistics

Category	Count
Exported types	46
Internal types	14
Enums	10
Module functions	13
Module properties	7
Singletons	5
Total public API surface	~93 named items
Naming inconsistencies found	5
Missing functionality items	5
Deprecations to resolve	3
Documentation gaps	2
Total findings	15

---

#314 Freeze Decisions (2026-06, recorded before generating the API-surface snapshot)

The April audit body above is partly stale. Live introspection of the built module gives the authoritative counts, and the snapshot test (tests/unit/api_surface_snapshot_test.py) is built from live introspection, not from this document.

Corrected live counts (2026-06): 12 enums (audit said 10 — adds Perspective #294 and Heuristic #315), 46 exported classes, 12 module functions, 7 singletons/constants (incl. the automation submodule), 1 submodule. GridPointState was removed in #294 (its F14 row is moot).

Per-finding final status: F1, F4, F6, F10, F11, F13, F14 = RESOLVED (verified in source via #304–#308). F2 = correct-by-design (docs-only). F5, F9 = cosmetic, unchanged. F7 (Music.pitch), F8 (Font methods) = Future, explicitly NOT 1.0 blockers.

Decisions locked for the freeze (the snapshot golden enshrines these):

• F3 (cell-position canonical name): grid_pos is canonical (matches the grid_pos= constructor argument); cell_pos/cell_x/cell_y are documented aliases. Both share the same getter/setter and remain interchangeable. Docstrings aligned at src/UIEntity.cpp getsetters.
• F12 (set_scale): KEPT in the 1.0 surface as a documented-deprecated function. Removing it now would itself be a new breaking change; the snapshot locks it in.
• mcrfpy.automation: PyAutoGUI-compatibility camelCase (moveRel/dragTo/etc.) is EXEMPT from the snake_case rule. The snapshot records it in a clearly-labeled section.
• entity.texture (new in #313): additive read/write property; getter returns the entity's real texture, None only in the degenerate (default_texture-null) case — never re-derefs a null default_texture. Added to the frozen contract + stubs + docs when #313 lands (golden gains exactly one line). Known edges, frozen as-is (2026-06-11 adversarial review): the getter mints a NEW Texture wrapper per access and Texture has no __eq__, so e.texture == e.texture is False — compare .source/sprite dims instead (same behavior as the pre-existing Sprite.texture); setting does not re-validate sprite_index against the new atlas; setter rejects non-Texture (TypeError), null-data Texture wrappers (ValueError, mirrors Sprite.texture), and deletion.

1.0 freeze scope — class classification (the snapshot segregates FROZEN vs EXPERIMENTAL):

• FROZEN (stable 1.0): core value types (Color, Vector, Font, Texture), UI drawables (Drawable [root], Frame, Caption, Sprite, Line, Circle, Arc), Grid/GridView/Entity, Scene, Window, Timer, Keyboard, Mouse, audio (Sound, SoundBuffer, Music), procgen (BSP, HeightMap, NoiseSource, DijkstraMap, AStarPath), all 12 enums, the snake_case module functions, and the singletons. (Provisionally frozen, flagged for confirmation at golden review: ColorLayer, TileLayer [core grid layers, distinct from Tiled import], DiscreteMap [#293/#294 grid data].)
• EXPERIMENTAL (exempt, may change post-1.0): 3D/Voxel (Billboard, Entity3D, EntityCollection3D[Iter], Model3D, Viewport3D, VoxelGrid, VoxelRegion), Tiled import (TileSetFile, TileMapFile, WangSet), LDtk import (LdtkProject, AutoRuleSet), Shader, and binding helpers (CallableBinding, PropertyBinding).

The snapshot test FAILS on any exported class not classified (forces a deliberate decision for future additions).