[Sam Beveridge (00salmon)]

Description of the change

Fixes issue with empty canvas + incorrectly loaded layouts

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation or Development tools (readme, specs, tests, code formatting)

Links

• Jira issue number: (PUT IT HERE)
• Process.st launch checklist: (PUT IT HERE)

Checklists

Development

• Prettier was run (if applicable)
• The behaviour changes in the pull request are covered by specs
• All tests related to the changed code pass in development

Paperwork

• This pull request has a descriptive title and information useful to a reviewer
• This pull request has a Jira number
• This pull request has a Process.st launch checklist

Code review

• Changes have been reviewed by at least one other engineer
• Security impacts of this change have been considered

[changeset-bot]

🦋 Changeset detected

Latest commit: 58ce6e3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@raisins/react	Minor

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[Copilot]

Copilot review overview

🟡 Changes recommended

Later molecule lookups receive fresh atoms while registrations remain bound to stale atoms from the first lookup.

Review effort: Balanced
Findings: 1 · 1

Open (2)

• registerOnce does not reuse values across molecule evaluations · New
• Add regression test for shared atom identity in registerOnce · New

What changed in this PR

Adds per-canvas registration deduplication for canvas plugins.

Changes:

• Introduces registerOnce using owner identity.
• Migrates built-in plugins and story renderers.
• Adds registration-count tests and a Changeset.

File	Description
.changeset/​canvas-register-once.md	Documents the new API.
packages/​react/​src/​index.stories.tsx	Deduplicates style renderer registration.
packages/​react/​src/​canvas/​CanvasController-Template.stories.tsx	Deduplicates root renderer registration.
packages/​react/​src/​canvas/​CanvasScopeMolecule.tsx	Implements registerOnce.
packages/​react/​src/​canvas/​CanvasScopeMolecule.test.tsx	Tests registration counts.
packages/​react/​src/​canvas/​plugins/​CanvasHoveredMolecule.ts	Groups hover registrations.
packages/​react/​src/​canvas/​plugins/​CanvasPickAndPlopMolecule.tsx	Groups pick-and-plop registrations.
packages/​react/​src/​canvas/​plugins/​CanvasSelectionMolecule.tsx	Groups selection registrations.

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