[compat-sync] Add Mesh.MergeMeshes over Lite merge; sync to BJS d690fa8 by babylon-compat-sync[bot] · Pull Request #511 · BabylonJS/Babylon-Lite

babylon-compat-sync · 2026-07-29T23:14:10Z

Automated sync of @babylonjs/lite-compat against the latest Babylon.js and Babylon Lite changes,
produced by the update-compat-layer skill.

Addresses #474.

Synced against BJS commit: d690fa8ffdf6d4b029409696d59992ac412d6c1d

Validation (run independently by the pipeline)

✅ compat unit tests
✅ compat typecheck

Changed files

ab/public/bundle/manifest/scene1.json
lab/public/bundle/manifest/scene10.json
lab/public/bundle/manifest/scene101.json
lab/public/bundle/manifest/scene104.json
lab/public/bundle/manifest/scene105.json
lab/public/bundle/manifest/scene11.json
lab/public/bundle/manifest/scene110.json
lab/public/bundle/manifest/scene111.json
lab/public/bundle/manifest/scene112.json
lab/public/bundle/manifest/scene113.json
lab/public/bundle/manifest/scene114.json
lab/public/bundle/manifest/scene115.json
lab/public/bundle/manifest/scene116.json
lab/public/bundle/manifest/scene118.json
lab/public/bundle/manifest/scene12.json
lab/public/bundle/manifest/scene127.json
lab/public/bundle/manifest/scene128.json
lab/public/bundle/manifest/scene13.json
lab/public/bundle/manifest/scene14.json
lab/public/bundle/manifest/scene141.json
lab/public/bundle/manifest/scene144.json
lab/public/bundle/manifest/scene145.json
lab/public/bundle/manifest/scene146.json
lab/public/bundle/manifest/scene147.json
lab/public/bundle/manifest/scene148.json
lab/public/bundle/manifest/scene149.json
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lab/public/bundle/manifest/scene157.json
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lab/public/bundle/manifest/scene165.json
lab/public/bundle/manifest/scene17.json
lab/public/bundle/manifest/scene171.json
lab/public/bundle/manifest/scene174.json
lab/public/bundle/manifest/scene175.json
lab/public/bundle/manifest/scene176.json
lab/public/bundle/manifest/scene177.json
lab/public/bundle/manifest/scene178.json
lab/public/bundle/manifest/scene179.json
lab/public/bundle/manifest/scene18.json
lab/public/bundle/manifest/scene19.json
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lab/public/bundle/manifest/scene269.json
lab/public/bundle/manifest/scene27.json
lab/public/bundle/manifest/scene271.json
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lab/public/bundle/manifest/scene28.json
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lab/public/bundle/manifest/scene6.json
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lab/public/bundle/manifest/scene73.json
lab/public/bundle/manifest/scene8.json
lab/public/bundle/manifest/scene94.json
lab/public/bundle/manifest/scene95.json
lab/public/bundle/manifest/scene98.json
lab/public/bundle/manifest/scene99.json
packages/babylon-lite-compat/COMPAT-STATUS.md
packages/babylon-lite-compat/README.md
packages/babylon-lite-compat/src/index.ts
packages/babylon-lite-compat/src/meshes/meshes.ts
packages/babylon-lite-compat/src/textures/raw-texture-2d-array.ts
packages/babylon-lite-compat/tests/raw-texture-2d-array.test.ts
packages/babylon-lite/src/index.ts
packages/babylon-lite-compat/tests/mesh-merge.test.ts
packages/babylon-lite/src/mesh/merge-mesh-geometry.ts

Validation passed. Please review the wrapper changes and the updated COMPAT-STATUS.md before merging.

Opened as a draft by the compat-sync pipeline. Review and mark ready when satisfied.

deltakosh · 2026-07-30T00:46:16Z

Automated review found blocking correctness issues:

packages/babylon-lite/src/mesh/merge-mesh-geometry.ts:94-158: source meshes with negative-determinant world transforms retain their original index winding and receive incorrectly oriented normals, so the merged result can render culled or inside-out.
packages/babylon-lite-compat/src/meshes/meshes.ts:631-636: before startup, source meshes have deferred scene-add callbacks. MergeMeshes disposes them without cancelling those callbacks, so startup can re-add disposed meshes whose GPU buffers were destroyed.

Please reverse each mirrored source's triangle winding, preserve outward normals with the correctly oriented inverse-transpose, and cancel or guard deferred adds for disposed meshes.

Merge current master, correct mirrored source winding and normals, and prevent disposed pre-start meshes from being re-added. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 51ece4e4-2b29-4d63-a4c8-be7026ec0be7

deltakosh · 2026-07-30T14:47:18Z

/azp run

azure-pipelines · 2026-07-30T14:47:30Z

Azure Pipelines successfully started running 1 pipeline(s).

Copilot

Pull request overview

Adds a Babylon Lite core geometry-merge primitive and wires it through @babylonjs/lite-compat as Mesh.MergeMeshes, syncing compat to Babylon.js commit d690fa8… and updating bundle manifests accordingly.

Changes:

Added mergeMeshGeometry (Lite core) and exported it from the root Lite entry point.
Implemented Mesh.MergeMeshes in lite-compat, forwarding to mergeMeshGeometry and rejecting unsupported Babylon.js semantics (plus added tests).
Added a throwing stub for CreateTexture2DArrayFromKTX2Async (needs Lite core support), updated compat docs/status, and refreshed per-scene bundle manifests.

Reviewed changes

Copilot reviewed 75 out of 75 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
ab/public/bundle/manifest/scene1.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene1.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene10.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene101.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene104.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene105.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene11.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene110.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene111.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene112.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene113.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene114.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene115.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene116.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene118.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene12.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene127.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene128.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene13.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene14.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene141.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene144.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene145.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene146.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene147.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene148.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene149.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene150.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene152.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene157.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene158.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene159.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene160.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene161.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene162.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene163.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene164.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene165.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene17.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene171.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene174.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene175.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene176.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene177.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene178.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene179.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene18.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene19.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene20.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene202.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene205.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene206.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene21.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene210.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene211.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene212.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene213.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene215.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene216.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene217.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene218.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene219.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene22.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene221.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene222.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene229.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene23.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene240.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene241.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene242.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene243.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene244.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene245.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene246.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene247.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene248.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene249.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene25.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene251.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene252.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene253.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene254.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene255.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene257.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene258.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene259.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene26.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene260.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene262.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene263.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene264.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene265.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene266.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene269.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene27.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene271.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene273.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene28.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene29.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene30.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene31.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene32.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene33.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene34.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene35.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene37.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene39.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene41.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene47.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene48.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene5.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene54.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene55.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene56.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene57.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene59.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene6.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene7.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene73.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene8.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene94.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene95.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene98.json	Update per-scene runtime bundle manifest after engine/compat changes
lab/public/bundle/manifest/scene99.json	Update per-scene runtime bundle manifest after engine/compat changes
packages/babylon-lite-compat/COMPAT-STATUS.md	Update sync SHA/date and document new/changed compat surfaces
packages/babylon-lite-compat/README.md	Update public compatibility matrix entries for `Mesh.MergeMeshes` and KTX2 array stub
packages/babylon-lite-compat/src/index.ts	Export newly added compat surface (`CreateTexture2DArrayFromKTX2Async`) and options type
packages/babylon-lite-compat/src/meshes/meshes.ts	Implement `Mesh.MergeMeshes` wrapper and ensure deferred add skips disposed meshes
packages/babylon-lite-compat/src/textures/raw-texture-2d-array.ts	Add `CreateTexture2DArrayFromKTX2Async` stub + options interface (throws `LiteCompatError`)
packages/babylon-lite-compat/tests/raw-texture-2d-array.test.ts	Add regression test asserting the KTX2 array stub rejects with `LiteCompatError`
packages/babylon-lite-compat/tests/mesh-merge.test.ts	Add compat-level unit tests for `Mesh.MergeMeshes` forwarding and rejection semantics
packages/babylon-lite/src/index.ts	Re-export `mergeMeshGeometry` from the root Lite entry point (no subpath exports)
packages/babylon-lite/src/mesh/merge-mesh-geometry.ts	Add standalone, tree-shakeable core geometry merge primitive (world-baked merge)
tests/lite/unit/merge-mesh-geometry.test.ts	Add Lite-core unit test covering mirrored winding reversal behavior

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bjsplat · 2026-07-30T15:29:20Z

API Changes

API Extractor detected public API changes for @babylonjs/lite.

No removed public API lines were detected; this appears to be additive.

API Extractor diff

diff --git a/home/vsts/work/1/s/test-results/api-report/target/temp/babylon-lite.api.md b/home/vsts/work/1/s/test-results/api-report/current/temp/babylon-lite.api.md
index 355d3eee..ff79ba6f 100644
--- a/home/vsts/work/1/s/test-results/api-report/target/temp/babylon-lite.api.md
+++ b/home/vsts/work/1/s/test-results/api-report/current/temp/babylon-lite.api.md
@@ -3285,6 +3285,9 @@ export interface MaterialView extends Material {
 // @public
 export let MAX_LIGHTS: number;
 
+// @public
+export function mergeMeshGeometry(engine: EngineContext, name: string, meshes: readonly Mesh[]): Mesh;
+
 // @public
 export interface Mesh extends SceneNode {
     // (undocumented)

bjsplat · 2026-07-30T15:35:57Z

Lite Playground - Static Site

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_{Build 20260730.20 - merge @ d868b38}

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 51ece4e4-2b29-4d63-a4c8-be7026ec0be7

deltakosh · 2026-07-30T19:58:36Z

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…74-2026-07-29-57097 # Conflicts: # packages/babylon-lite-compat/README.md

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deltakosh · 2026-07-30T23:46:30Z

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deltakosh · 2026-07-31T00:18:40Z

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chore(compat): Babylon.js compat-layer sync (2026-07-29)

3c2b16f

babylon-compat-sync Bot added automation compat Missing or broken feature in the compatibility layer (@babylonjs/lite-compat) labels Jul 29, 2026

deltakosh marked this pull request as ready for review July 30, 2026 14:47

Copilot AI review requested due to automatic review settings July 30, 2026 14:47

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Comment thread packages/babylon-lite-compat/src/meshes/meshes.ts

Comment thread packages/babylon-lite-compat/tests/mesh-merge.test.ts

deltakosh approved these changes Jul 30, 2026

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deltakosh enabled auto-merge (squash) July 30, 2026 17:53

fix(compat): keep mesh merge out of lite bundles

d0f8fa7

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 51ece4e4-2b29-4d63-a4c8-be7026ec0be7

Merge master into compat mesh merge

826ed90

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 51ece4e4-2b29-4d63-a4c8-be7026ec0be7

fix(compat): resolve master merge type errors

033479d

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: 51ece4e4-2b29-4d63-a4c8-be7026ec0be7

deltakosh added 2 commits July 30, 2026 14:27

Merge latest master into compat mesh merge

56d373d

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Merge remote-tracking branch 'origin/master' into compat-sync/issue-4…

313746d

…74-2026-07-29-57097 # Conflicts: # packages/babylon-lite-compat/README.md

Merge remote-tracking branch 'origin/compat-sync/issue-474-2026-07-29…

2406d3d

…-57097' into compat-sync/issue-474-2026-07-29-57097 # Conflicts: # packages/babylon-lite-compat/README.md

test(compat): register merged meshes in scene fixture

5bf0f3e

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deltakosh added 2 commits July 30, 2026 15:53

Merge master into compat-sync/issue-474-2026-07-29-57097

83664f3

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: ce4e502c-0131-42d8-90e8-03598a258221

fix(compat): sync mesh merge updates with latest master

bd2c255

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: ce4e502c-0131-42d8-90e8-03598a258221

chore: refresh device bundle manifests

c5b89b2

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> Copilot-Session: ce4e502c-0131-42d8-90e8-03598a258221

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