chore(replay-vision): add quality tab docs

[arnohillen]

Note

Superseded by PostHog/posthog.com#18803. The Replay Vision docs section lives in the posthog.com repo (contents/docs/replay-vision/), so the page moved there to sit with its siblings and get a sidebar entry.

Problem

Replay vision's Quality tab (rate scanner results, feedback themes, ratings-over-time, AI configuration recommendations with test-before-apply) has no user-facing documentation yet. With the feature rolling out, users need a page explaining the rating loop and what each panel does.

Changes

Adds a first docs page at docs/published/docs/session-replay/replay-vision/quality.md, which publishes to posthog.com/docs/session-replay/replay-vision/quality on merge.

The page covers:

• Rating results (thumbs up/down, written feedback, the unrated queue, confidence-first rating, version column)
• Feedback themes and how they steer recommendations
• The ratings-over-time chart and per-version accuracy chips
• Configuration recommendations covering the prompt and the other behavior fields (tag vocabulary, scale, summary length, flags), with diff, rationale, regenerate/staleness, and history
• Test-before-apply (fixed/still wrong/kept/regressed, quota cost, scorer/summarizer preview mode)
• Apply/dismiss semantics and the overall improvement loop

Screenshots were taken from a local dev environment with Hedgebox demo data only (no customer data) and are hosted on PostHog/pr-assets. Happy to re-host on Cloudinary if that's preferred for posthog.com docs.

TODO before merge

• Retake the screenshots with more realistic data: the current Hedgebox demo shots have synthetic session IDs (demo-fresh-*) and uniform confidence values. Use a scanner with real-looking sessions.

Preview of the page's hero image:

How did you test this code?

Docs-only change, no code paths affected. I verified the copy against the implementation (products/replay_vision/frontend/replay_scanners/components/ScannerQualityTab.tsx, scannerQualityLogic.ts, and backend/prompt_suggestions.py) so each described behavior matches what ships: default unrated filter, daily recommendation refresh, per-version accuracy attribution, evaluation outcome labels, and quota charging for test re-runs.

Automatic notifications

• Publish to changelog?
• Alert Sales and Marketing teams?

Docs update

This PR is itself the docs update.

🤖 Agent context

Autonomy: Human-driven (agent-assisted)

I (well, Claude Code) wrote the page after reading the Quality tab frontend and the prompt-suggestion backend, then captured the screenshots with a Playwright script against a local dev stack seeded with Hedgebox demo data (dev banners hidden, light theme, retina scale), uploaded via hogli pr:upload-image. Decisions: placed the page under docs/published/docs/ (the monorepo path that publishes to posthog.com, following the existing surveys precedent) rather than the posthog.com repo, and used pr-assets image URLs as a first version pending Cloudinary hosting. No repo skills were applicable (docs-only, no migrations/DRF/tests).

[github-actions]

🤖 CI report

ℹ️ Docs preview — preview build triggered

Docs from this PR will be published at posthog.com.

Project	Preview	Updated (UTC)
posthog.com	Open preview	Jul 22, 2026, 2:07 PM

The preview should be ready in about 10 minutes. Open the preview at /handbook/engineering/.