<!-- ccr-slack-attribution --> _Requested by **Pam Chia** · [Slack thread](https://supabase.slack.com/archives/C076KTY11DF/p1788139328573799?thread_ts=1788139328.573799&cid=C076KTY11DF)_ ## I have read the [CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md) file. YES ## What kind of change does this PR introduce? Feature (telemetry). Adds one PostHog event. Linear issue: [GROWTH-1154](https://linear.app/supabase/issue/GROWTH-1154/telemetry-explorer-feature-preview-banner-has-no-exposure-event-so) ## What is the current behavior? The Explorer feature preview banner emits `explorer_banner_dismiss_button_clicked` and `explorer_banner_cta_button_clicked` (both from `apps/studio/components/ui/BannerStack/Banners/BannerExplorer.tsx`, shipped in #49606), and nothing else. With no impression event there is no denominator, so no click-through or dismiss rate can be reported. ## What is the new behavior? `explorer_banner_exposed` fires when the banner content is rendered, at most once per page load. The event is declared in `packages/common/telemetry-constants.ts` next to the two existing Explorer banner events and added to the `TelemetryEvent` union, following the existing `*_exposed` family. It carries no custom properties; `project` and `organization` groups are attached by `apps/studio/lib/telemetry/track.ts`. **Verification:** - `prettier --check` on both changed files: passing - `tsc --noEmit` in `packages/common`, which covers the new event interface and the `TelemetryEvent` union: passing - Studio-scoped lint, typecheck, and tests: green on CI - Browser-tested on the studio-staging preview (Playwright): the exposure event fires exactly once per page load (201 on the wire), does not re-fire on client-side navigation or banner hover within the same page load, fires again after a full reload, and does not fire after dismissal; the CTA and dismiss click events are unchanged and carry the `project`/`organization` groups **Out of scope:** - Pre-consent drops: every telemetry event waits for consent, so this event degrades the same way the rest of the `*_exposed` family does (transient, recovers on the next page load). A family-wide fix is a separate issue. - Mirroring the `explorer` flag state into event properties: redundant once exposure exists. - The CTA handler not dismissing the banner: raised separately, both click handlers untouched. - [GROWTH-1153](https://linear.app/supabase/issue/GROWTH-1153/telemetry-advisorcategory-omitted-for-health-lints-on-two-of-five) and its draft PR #49746: separate issue, no overlap. --- _Generated by [Claude Code](https://claude.ai/code/session_01Xwj2SotnaHByjbTfqF4Kdm); reworked per Pam's review._ --------- Co-authored-by: Claude <noreply@anthropic.com> Co-authored-by: Pamela Chia <pamelachiamayyee@gmail.com>
Supabase
Supabase is the Postgres development platform. We're building the features of Firebase using enterprise-grade open source tools.
- Hosted Postgres Database. Docs
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How it works
Supabase is a combination of open source tools. We’re building the features of Firebase using enterprise-grade, open source products. If the tools and communities exist, with an MIT, Apache 2, or equivalent open license, we will use and support that tool. If the tool doesn't exist, we build and open source it ourselves. Supabase is not a 1-to-1 mapping of Firebase. Our aim is to give developers a Firebase-like developer experience using open source tools.
Architecture
Supabase is a hosted platform. You can sign up and start using Supabase without installing anything. You can also self-host and develop locally.
- Postgres is an object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.
- Realtime is an Elixir server that allows you to listen to PostgreSQL inserts, updates, and deletes using websockets. Realtime polls Postgres' built-in replication functionality for database changes, converts changes to JSON, then broadcasts the JSON over websockets to authorized clients.
- PostgREST is a web server that turns your PostgreSQL database directly into a RESTful API.
- GoTrue is a JWT-based authentication API that simplifies user sign-ups, logins, and session management in your applications.
- Storage a RESTful API for managing files in S3, with Postgres handling permissions.
- pg_graphql a PostgreSQL extension that exposes a GraphQL API.
- postgres-meta is a RESTful API for managing your Postgres, allowing you to fetch tables, add roles, and run queries, etc.
- Envoy is a cloud-native, high-performance edge and service proxy.
Client libraries
Our approach for client libraries is modular. Each sub-library is a standalone implementation for a single external system. This is one of the ways we support existing tools.
| Language | Client | Feature-Clients (bundled in Supabase client) | ||||
|---|---|---|---|---|---|---|
| Supabase | PostgREST | GoTrue | Realtime | Storage | Functions | |
| ⚡️ Official ⚡️ | ||||||
| JavaScript (TypeScript) | supabase-js | postgrest-js | auth-js | realtime-js | storage-js | functions-js |
| Flutter | supabase-flutter | postgrest-dart | gotrue-dart | realtime-dart | storage-dart | functions-dart |
| Swift | supabase-swift | postgrest-swift | auth-swift | realtime-swift | storage-swift | functions-swift |
| Python | supabase-py | postgrest-py | gotrue-py | realtime-py | storage-py | functions-py |
| 💚 Community 💚 | ||||||
| C# | supabase-csharp | postgrest-csharp | gotrue-csharp | realtime-csharp | storage-csharp | functions-csharp |
| Go | - | postgrest-go | gotrue-go | - | storage-go | functions-go |
| Java | - | - | gotrue-java | - | storage-java | - |
| Kotlin | supabase-kt | postgrest-kt | auth-kt | realtime-kt | storage-kt | functions-kt |
| Ruby | supabase-rb | postgrest-rb | - | - | - | - |
| Rust | - | postgrest-rs | - | - | - | - |
| Godot Engine (GDScript) | supabase-gdscript | - | - | - | - | - |
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