Lets self-hosted Studio toggle flags in `enabled-features.json` at
container start time via `ENABLED_FEATURES_*` env vars, without
rebuilding the prebuilt image. Addresses
[FE-3036](https://linear.app/supabase/issue/FE-3036/allow-enabled-featuresjson-flags-to-be-overridden-via-env-vars)
and is a prerequisite for
[COM-205](https://linear.app/supabase/issue/COM-205/add-feature-flag-to-disable-all-logs-in-studio).
**Added:**
- `packages/common/enabled-features/overrides.ts` — pure parser that
maps `ENABLED_FEATURES_*` env vars to a disabled-features list
(forward-only key mapping, boolean validation, typo warnings) + 10
vitest tests
- `apps/studio/pages/api/enabled-features-overrides.ts` — Next.js API
route reading `process.env` at request time; no-op (`{
disabled_features: [] }`) when `IS_PLATFORM`
- `apps/studio/data/misc/enabled-features-override-query.ts` — React
Query hook with `staleTime: Infinity`, `enabled: !IS_PLATFORM`
- `packages/common/enabled-features/README.md` — docs the env var
convention, resolution order, `IS_PLATFORM` gating, and the
`Support.constants.ts` build-time caveat
**Changed:**
- `apps/studio/hooks/misc/useIsFeatureEnabled.ts` — merges the
override's `disabled_features` with `profile.disabled_features`
### Env var shape
One var per flag, prefixed `ENABLED_FEATURES_`. Feature key → env name:
uppercase with every non-alphanumeric char replaced by `_`.
```bash
ENABLED_FEATURES_LOGS_ALL=false
ENABLED_FEATURES_BRANDING_LARGE_LOGO=true
```
Values are `true`/`false` case-insensitively. Other values and prefixed
vars that don't match a known feature are logged and ignored.
### Resolution order (runtime, Studio only)
1. `ENABLED_FEATURES_*` (self-hosted, via API route → React Query →
hook)
2. `profile.disabled_features` (hosted, from `/platform/profile`)
3. `enabled-features.json` static value
4. Default (enabled)
`ENABLED_FEATURES_OVERRIDE_DISABLE_ALL` still short-circuits everything.
### Known limitation
`apps/studio/components/interfaces/Support/Support.constants.ts:4` calls
`isFeatureEnabled('billing:all')` at module load to build
`CATEGORY_OPTIONS`, which is spread into Zod form schemas. That call
site stays resolved from the JSON — documented in the package README.
`billing:all` isn't on the radar for self-hosted runtime toggling.
## To test
- `cd packages/common && pnpm exec vitest run enabled-features` — 10 new
tests pass
- `pnpm --filter studio run typecheck` clean
- Spin Studio locally with `NEXT_PUBLIC_IS_PLATFORM=false` and
`ENABLED_FEATURES_LOGS_TEMPLATES=false`;
`/project/[ref]/logs/explorer/templates` should reflect the flag after
the override fetch resolves
- Confirm the API route returns `{ disabled_features: [] }` when
`NEXT_PUBLIC_IS_PLATFORM=true`
- Set a typo like `ENABLED_FEATURES_LOGS_TMEPLATES=false` and check the
warning in container logs; flag stays enabled
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Runtime feature-flag overrides for self-hosted deployments (env var
driven), new API endpoint and client-side hook to fetch overrides, and
client logic now merges profile and runtime overrides.
* **Documentation**
* Added comprehensive README describing the feature-flag system and
override configuration.
* **Tests**
* Added unit tests for override parsing and E2E tests covering runtime
override behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Alaister Young <10985857+alaister@users.noreply.github.com>
