[adinauer]

PR Stack (Scope-Based Deduplication)

• feat(core): Scope-based duplicate event detection #6428
• feat(core): [Scope-Based Deduplication 1] Add event processor fork semantics #6429
• feat(core): [Scope-Based Deduplication 2] Add scope-based duplicate event processor #6430
• feat(core): [Scope-Based Deduplication 3] Add scope-based deduplication option #6431

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📜 Description

Add a default EventProcessor.fork() lifecycle contract and invoke it whenever a Scope is cloned. Preserve processor ordering and reuse the original processor if customer extension code returns null or fails recoverably.

💡 Motivation and Context

Stateful event processors need independent state when isolation scopes are cloned, while existing stateless and customer-defined processors must remain shared by default. This establishes the lifecycle primitive needed for request-local duplicate event detection.

refs: #6365

💚 How did you test it?

• ./gradlew :sentry:test
• ./gradlew spotlessApply :sentry:updateKotlinAbi
• Added coverage for default and custom forks, ordering, recoverable failures, fatal errors, and CombinedScopeView cloning.

📝 Checklist

• I added GH Issue ID & Linear ID
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.
• Public API changes reviewed by another Mobile SDK team member or implemented according to the develop docs spec.

🔮 Next steps

The next PR adds the internal scope-based duplicate event processor using this fork contract.

#skip-changelog

⚠️ Merge this PR using a merge commit (not squash). Only the collection branch is squash-merged into main.

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📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

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📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.62.0 (1)	release

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