PostHog / PostHog/posthog-flutter
Session replay: apply remote (server-side) masking config
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- Dominant language
- Dart
- Stars
- 97
- Forks
- 85
- Avg merge
- 1d 8h
- Merged PRs (30d)
- 31
Description
Part of the replay parity tracker PostHog/posthog#30889.
Problem
Flutter replay masking is computed entirely from local Dart config. PostHogSessionReplayConfig.toMap() forwards only sampleRate to native (posthog_config.dart:597), and masking is applied Dart-side from local config in the screenshot pipeline, so a server-delivered masking payload has no path into Flutter's masking. Only sampleRate is remote-aware today.
Scope
- Plumb remote-config
maskinginto the Dart screenshot masking pipeline.
Reference: posthog-js applies server-side masking in packages/browser/src/extensions/replay/external/lazy-loaded-session-recorder.ts (this._remoteConfig?.masking).
Parity across SDKs
- Android: PostHog/posthog-android#639
- iOS: PostHog/posthog-ios#725
- React Native: PostHog/posthog-js#4184
- Flutter: PostHog/posthog-flutter#492 (this issue)
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with posthog_config.dart:597 to trace how session replay configuration reaches native, then follow the Dart screenshot masking pipeline. Compare the intended remote masking behavior with packages/browser/src/extensions/replay/external/lazy-loaded-session-recorder.ts and verify that a server-delivered masking payload affects Flutter screenshots while sampleRate continues to work.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- dart, flutter
- Domain
- mobile
- Issue type
- Feature
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 68/100