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Improve <code>ThinSlicePtr</code> API

A-PointersRelating to Bevy pointer abstractionsRelating to Bevy pointer abstractions

C-Code-QualityA section of code that is hard to understand or changeA section of code that is hard to understand or change

C-DocsAn addition or correction to our documentationAn addition or correction to our documentation

D-StraightforwardSimple bug fixes and API improvements, docs, test and examplesSimple bug fixes and API improvements, docs, test and examples

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

M-Migration-GuideA breaking change to Bevy's public API that needs to be noted in a migration guideA breaking change to Bevy's public API that needs to be noted in a migration guide

S-Ready-For-Final-ReviewThis PR has been approved by the community. It's ready for a maintainer to consider merging itThis PR has been approved by the community. It's ready for a maintainer to consider merging it

Status: Open (in progress).

bevyengine/bevynumber 21823

#21823 In bevyengine/bevy;

· BD103 opened on Nov 13, 2025

Remove <code>bevy_ptr::dangling_with_align()</code> and inline it

A-PointersRelating to Bevy pointer abstractionsRelating to Bevy pointer abstractions

C-Code-QualityA section of code that is hard to understand or changeA section of code that is hard to understand or change

D-StraightforwardSimple bug fixes and API improvements, docs, test and examplesSimple bug fixes and API improvements, docs, test and examples

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

M-Migration-GuideA breaking change to Bevy's public API that needs to be noted in a migration guideA breaking change to Bevy's public API that needs to be noted in a migration guide

S-Needs-ReviewNeeds reviewer attention (from anyone!) to move forwardNeeds reviewer attention (from anyone!) to move forward

Status: Open (in progress).

bevyengine/bevynumber 21822

#21822 In bevyengine/bevy;

· BD103 opened on Nov 13, 2025

Optimized <code>BindGroupLayoutCache</code> to reduce unnecessary cloning

A-RenderingDrawing game state to the screenDrawing game state to the screen

C-PerformanceA change motivated by improving speed, memory usage or compile timesA change motivated by improving speed, memory usage or compile times

D-StraightforwardSimple bug fixes and API improvements, docs, test and examplesSimple bug fixes and API improvements, docs, test and examples

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

S-Needs-ReviewNeeds reviewer attention (from anyone!) to move forwardNeeds reviewer attention (from anyone!) to move forward

Status: Open (in progress).

bevyengine/bevynumber 21757

#21757 In bevyengine/bevy;

· brianreavis opened on Nov 5, 2025

Nested Queries

A-ECSEntities, components, systems, and eventsEntities, components, systems, and events

C-FeatureA new feature, making something new possibleA new feature, making something new possible

D-ComplexQuite challenging from either a design or technical perspective. Ask for help!Quite challenging from either a design or technical perspective. Ask for help!

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

M-Migration-GuideA breaking change to Bevy's public API that needs to be noted in a migration guideA breaking change to Bevy's public API that needs to be noted in a migration guide

M-Release-NoteWork that should be called out in the blog due to impactWork that should be called out in the blog due to impact

S-Needs-ReviewNeeds reviewer attention (from anyone!) to move forwardNeeds reviewer attention (from anyone!) to move forward

Status: Open (in progress).

bevyengine/bevynumber 21557

#21557 In bevyengine/bevy;

· chescock opened on Oct 15, 2025

· 

0.18

General entity set cleanup

A-ECSEntities, components, systems, and eventsEntities, components, systems, and events

C-Code-QualityA section of code that is hard to understand or changeA section of code that is hard to understand or change

C-DocsAn addition or correction to our documentationAn addition or correction to our documentation

C-PerformanceA change motivated by improving speed, memory usage or compile timesA change motivated by improving speed, memory usage or compile times

C-UsabilityA targeted quality-of-life change that makes Bevy easier to useA targeted quality-of-life change that makes Bevy easier to use

D-ModestA "normal" level of difficulty; suitable for simple features or challenging fixesA "normal" level of difficulty; suitable for simple features or challenging fixes

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

S-Needs-ReviewNeeds reviewer attention (from anyone!) to move forwardNeeds reviewer attention (from anyone!) to move forward

Status: Open (in progress).

bevyengine/bevynumber 21498

#21498 In bevyengine/bevy;

· Victoronz opened on Oct 10, 2025

MovingPtr&lt;'_,B: Bundle&gt; impls Bundle but with <code>typeid</code>

A-ECSEntities, components, systems, and eventsEntities, components, systems, and events

C-BugAn unexpected or incorrect behaviorAn unexpected or incorrect behavior

C-UsabilityA targeted quality-of-life change that makes Bevy easier to useA targeted quality-of-life change that makes Bevy easier to use

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

M-Migration-GuideA breaking change to Bevy's public API that needs to be noted in a migration guideA breaking change to Bevy's public API that needs to be noted in a migration guide

S-Needs-BenchmarkingThis set of changes needs performance benchmarking to double-check that they helpThis set of changes needs performance benchmarking to double-check that they help

S-Needs-ReviewNeeds reviewer attention (from anyone!) to move forwardNeeds reviewer attention (from anyone!) to move forward

X-ContentiousThere are nontrivial implications that should be thought throughThere are nontrivial implications that should be thought through

Status: Open (in progress).

bevyengine/bevynumber 21454

#21454 In bevyengine/bevy;

· janis-bhm opened on Oct 8, 2025

<code>MovingPtr&lt;'_,B: Bundle&gt;</code> impls Bundle

A-ECSEntities, components, systems, and eventsEntities, components, systems, and events

C-BugAn unexpected or incorrect behaviorAn unexpected or incorrect behavior

C-UsabilityA targeted quality-of-life change that makes Bevy easier to useA targeted quality-of-life change that makes Bevy easier to use

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

M-Migration-GuideA breaking change to Bevy's public API that needs to be noted in a migration guideA breaking change to Bevy's public API that needs to be noted in a migration guide

S-Needs-ReviewNeeds reviewer attention (from anyone!) to move forwardNeeds reviewer attention (from anyone!) to move forward

S-Needs-TestingTesting must be done before this is safe to mergeTesting must be done before this is safe to merge

X-ContentiousThere are nontrivial implications that should be thought throughThere are nontrivial implications that should be thought through

Status: Draft (not ready).

bevyengine/bevynumber 21443

#21443 In bevyengine/bevy;

· janis-bhm opened on Oct 7, 2025

Entity scope v1: component scope

A-ECSEntities, components, systems, and eventsEntities, components, systems, and events

C-FeatureA new feature, making something new possibleA new feature, making something new possible

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

M-Release-NoteWork that should be called out in the blog due to impactWork that should be called out in the blog due to impact

S-Needs-ReviewNeeds reviewer attention (from anyone!) to move forwardNeeds reviewer attention (from anyone!) to move forward

S-Waiting-on-AuthorThe author needs to make changes or address concerns before this can be mergedThe author needs to make changes or address concerns before this can be merged

X-ControversialThere is active debate or serious implications around merging this PRThere is active debate or serious implications around merging this PR

Status: Draft (not ready).

bevyengine/bevynumber 21430

#21430 In bevyengine/bevy;

· janis-bhm opened on Oct 6, 2025

Relationships are spawned separate from their bundle in Bevy 0.17

A-ECSEntities, components, systems, and eventsEntities, components, systems, and events

C-BugAn unexpected or incorrect behaviorAn unexpected or incorrect behavior

D-ComplexQuite challenging from either a design or technical perspective. Ask for help!Quite challenging from either a design or technical perspective. Ask for help!

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

S-Ready-For-ImplementationThis issue is ready for an implementation PR. Go for it!This issue is ready for an implementation PR. Go for it!

X-BlessedHas a large architectural impact or tradeoffs, but the design has been endorsed by decision makersHas a large architectural impact or tradeoffs, but the design has been endorsed by decision makers

Status: Open.

#21428 In bevyengine/bevy;

· cart opened on Oct 6, 2025

· 

0.17.4

<code>Observer</code>s' underlying system state can change after they have been spawned

A-ECSEntities, components, systems, and eventsEntities, components, systems, and events

C-BugAn unexpected or incorrect behaviorAn unexpected or incorrect behavior

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

P-UnsoundA bug that results in undefined compiler behaviorA bug that results in undefined compiler behavior

Status: Open.

#20737 In bevyengine/bevy;

· SkiFire13 opened on Aug 24, 2025

<code>Observer</code>s' system state can become invalid while they're running

A-ECSEntities, components, systems, and eventsEntities, components, systems, and events

C-BugAn unexpected or incorrect behaviorAn unexpected or incorrect behavior

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

P-UnsoundA bug that results in undefined compiler behaviorA bug that results in undefined compiler behavior

Status: Open.

#20736 In bevyengine/bevy;

· SkiFire13 opened on Aug 24, 2025

Consolidate together Bevy's TaskPools

A-TasksTools for parallel and async workTools for parallel and async work

C-PerformanceA change motivated by improving speed, memory usage or compile timesA change motivated by improving speed, memory usage or compile times

D-ComplexQuite challenging from either a design or technical perspective. Ask for help!Quite challenging from either a design or technical perspective. Ask for help!

D-UnsafeTouches with unsafe code in some wayTouches with unsafe code in some way

M-Migration-GuideA breaking change to Bevy's public API that needs to be noted in a migration guideA breaking change to Bevy's public API that needs to be noted in a migration guide

M-Release-NoteWork that should be called out in the blog due to impactWork that should be called out in the blog due to impact

S-BlockedThis cannot move forward until something else changesThis cannot move forward until something else changes

Status: Draft (not ready).

bevyengine/bevynumber 20699

#20699 In bevyengine/bevy;

· james7132 opened on Aug 22, 2025

· 

0.18