PostHog / PostHog/posthog

Feature request: Sequential testing

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enhancement team/experiments
Dominant language
Python
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Description

Feature request

Template not yet filled out, just to start tracking demand. Context: https://posthog.slack.com/archives/C07PXH2GTGV/p1776754497414459

Is your feature request related to a problem?

Customers, especially those with a data-science-heavy experimentation practice or AI-driven rapid-iteration workflows, want to safely "peek" at experiment results and make decisions earlier when the signal is clear, without inflating false-positive rates.

Describe the solution you'd like

Describe alternatives you've considered

Additional context

Feature gap

Debug info
- [ ] PostHog Cloud, Debug information: [please copy/paste from https://us.posthog.com/settings/project-details#variables]
- [ ] PostHog Hobby self-hosted with `docker compose`, version/commit: [please provide]
- [ ] PostHog self-hosted with Kubernetes (deprecated, see [`Sunsetting Kubernetes support`](https://posthog.com/blog/sunsetting-helm-support-posthog)), version/commit: [please provide]

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the linked Slack discussion to understand the customer demand and existing experimentation behavior. The issue names no files, tests, or entry points and leaves the solution unspecified, so first establish the intended sequential-testing scope and acceptance criteria before locating implementation work.

Written by the indexing model from the issue text.

Assessment

Domain
analytics
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
25/100

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