## Summary
- `getReadReplicas` now accepts an optional `headers?: HeadersInit`
param, forwarded to the underlying `get()` call — mirrors
`getContentById`/`getNotebook`.
- Pure plumbing: no behavior change for existing (browser/cookie-auth)
callers.
Part 1/6 of the stack for FE-4225 (expose valid database identifiers to
the notebook AI agent). This PR lets a server-side AI tool call
`getReadReplicas` with the request's bearer token in a later PR in the
stack.
## Test plan
- [x] `getReadReplicas` unit test verifying the header is forwarded on
the outgoing request
- [x] `pnpm --filter studio exec tsc --noEmit` passes
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Improved read-replica data requests by forwarding authorization
headers correctly.
* Maintained existing request cancellation and error-handling behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
INDATA-193
BACKEND: <https://github.com/supabase/platform/pull/30575>
<img width="1199" height="1005" alt="Screenshot 2026-04-03 at 11 54 29"
src="https://github.com/user-attachments/assets/38e9d676-449f-45c0-9e07-f273312a812f"
/>
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Refactor**
* Consolidated read replica limit configuration to provide more
consistent behavior across different compute tiers.
* **Tests**
* Added comprehensive test coverage for read replica eligibility checks
and replica limit calculations based on compute tier.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Charis