Files
Pedro Rodrigues 22d7bc0cfd feat(studio-evals): custom search_docs tool for the eval harness (no token / no PAT) (#50092)
- Eval harness's only live tool, `search_docs`, no longer needs the
in-process MCP client or its dummy token — it now calls the public docs
GraphQL API (`https://supabase.com/docs/api/graphql`) directly. Low risk
as this is an eval-harness change only. Production assistant path
(`mcp-tools.ts`) untouched.

**Update:** per [@mattrossman's
review](https://github.com/supabase/supabase/pull/50092#discussion_r3980396341),
the eval tool's description embeds the Content API's own GraphQL schema
(fetched via a `{ schema }` query and minified with `gqlmin`), mirroring
how `@supabase/mcp-server-supabase`'s `docs-tools.ts`/`loadSchema`
populates production's `search_docs` description. Without it, the model
had no schema to work from and issued malformed queries, which caused
the 218 `search_docs` errors and the -25pp Docs Faithfulness regression
in the first eval run on this PR. Schema loading is required:
`createSearchDocsTool()` rejects if the schema fetch fails, so preflight
and the gated eval job fail loudly instead of producing untrustworthy
fallback results. `createSearchDocsTool` is async because the `ai`
package's `tool()` only accepts a plain string `description`, unlike the
MCP SDK's async description support; both callers (`getMockTools`,
`evals/preflight.ts`) await it. `gqlmin` is a direct `apps/studio`
dependency and was already transitive via
`@supabase/mcp-server-supabase`.

### Verification
- `pnpm -C apps/studio exec -- tsc --noEmit` reaches the compiler; it
reports only the pre-existing unrelated
`packages/ui-patterns/src/McpUrlBuilder/components/InstructionBlocks.tsx`
`StaticImageData` error.
- `pnpm -C apps/studio exec -- vitest run
lib/ai/tools/mock-tools.test.ts lib/ai/tools/mcp-tools.test.ts` — 21/21
passed.
- `pnpm exec tsx evals/preflight.ts` — live docs API schema fetch and
search_docs call passed.
- `NEXT_PUBLIC_CONTENT_API_URL=http://127.0.0.1:1/graphql pnpm -C
apps/studio exec -- tsx evals/preflight.ts` — failed fast as expected,
proving schema/API failures gate evals.
- Fresh `run-evals` pass: Docs Faithfulness 55.7% (0pp), with no
systemic `search_docs` regression.

Risk: eval-harness-only; schema/API outage now fails the eval job before
scoring rather than allowing fallback descriptions.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added documentation search powered by the public Supabase
documentation GraphQL API.
* Documentation search results now include live schema information and
clearer error handling for failed or invalid requests.

* **Bug Fixes**
* Improved evaluation tooling reliability by removing unnecessary
connection-abort behavior.
* Updated validation to detect missing search tools and malformed
documentation responses.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
2026-09-14 12:51:14 +02:00
..

Studio Assistant Evals

We use Braintrust to evaluate Assistant behaviors against a tracked dataset (offline evals) and against live traces (online evals).

Offline Evals

Add offline eval test cases to dataset.ts. If needed, add new scorers (see below) for the specific dimension you wish to test. Expect to update and run offline evals when adding new Assistant behaviors

You may wish to run offline evals when:

  • You updated the eval suite with a new test case or scorer
  • You changed Assistant's behavior and want to check for improvements/regressions

Running Offline Evals in CI

Add the run-evals label on a PR to the repo and Braintrust's GitHub Action will run evals and post a summary comment (example).

You can find detailed results in the "Experiments" tab of the "Assistant" project on Braintrust.

Running Offline Evals in Local Dev

Within apps/studio

# To set up WASM files
pnpm evals:setup

# Run all evals and upload results to Braintrust
pnpm evals:upload

# Run all evals without uploading results
pnpm evals:run

# Run an upload single test case
pnpm braintrust eval evals/assistant.eval.ts --filter "input.prompt=How many projects"

Upload results when you want to inspect Experiments or Logs in the Braintrust dashboard or API. You can use developer tools like Braintrust MCP or bt CLI to analyze results with an agent.

Scorers

Scorers look at a thread or task output and assign a score deterministically or via LLM-as-a-judge. Optionally they can consider expected values.

Define scorers in scorer.ts and include them in assistant.eval.ts to run them in offline evals.

Updating Online Scorers

Online scorers run as serverless functions on Braintrust infrastructure. They're deployed from the scorer-online.ts script. Since these scoring against production traces, they can't rely on ground truth expected values. Structure scoring logic and LLM prompts accordingly. Not every scorer needs to be an online scorer.

To opt-in to online scoring, add the scorer to scorer-online-manifest.json and add a corresponding handler in scorer-online.ts

Testing & Deploying Online Scorers

Add the preview-scorers label to a PR to deploy branch-prefixed scorers to the "Assistant (Staging Scorers)" Braintrust project (example). From that project dashboard, you can manually test the scorer against a trace from any project.

After merge to master, preview scorers automatically clean up and deploy to the production in the "Assistant" Braintrust project. Update the "Online Scoring" automation in the Logs page to include the new scorer function.