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@data-elements/studio

v0.3.1

Published

Local-first Nitro server for the Tessera database analysis workspace on Node.js and Bun.

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Git

Maintainers

erkelosterkelost

Keywords

Readme

Tessera Studio

Tessera Studio is the local web workspace for exploring and analyzing a PostgreSQL, MySQL, SQLite, or Turso database. It is normally started through the tessera command shipped by the data-elements package:

npx data-elements@latest studio postgresql://readonly:[email protected]:5432/warehouse

What Studio does

  • Chat with a database assistant using regular Markdown responses.
  • Inspect the available catalog and run governed, read-only analysis.
  • Show compact execution progress and query evidence alongside the response.
  • Accept image attachments in a chat message, including pasted images.
  • Keep local chat sessions in the Studio SQLite store.

Studio deliberately does not generate or render structured result cards. A completed analysis is presented as Markdown plus its execution progress and evidence, which keeps the conversation layout stable for long answers and database results.

The Studio server and its local session store run on Node.js 24 or later and Bun 1.3 or later. A project can keep the connection string and model-provider settings in a server-only tessera.config.ts file and then run npx data-elements@latest studio from that project directory.

SQLite accepts an existing local database through file: or sqlite:. Turso accepts libsql: or turso: and reads its separate server-only credential from database.authToken or TURSO_AUTH_TOKEN. SQLite and Turso connections are always read-only in Studio.

npx data-elements@latest studio file:/absolute/path/to/warehouse.db
TURSO_AUTH_TOKEN=... npx data-elements@latest studio libsql://warehouse-org.turso.io

Local development

From this directory:

bun install
bun run dev

Nitro serves both the API and Vite client at http://127.0.0.1:4317. Run bun test src for the Studio test suite or bun run build to create the CLI, library, and deployable Nitro server.

The Nitro production output is written to dist/nitro. Start it with Node.js 24 or Bun:

node dist/nitro/server/index.mjs

The standalone tessera studio CLI remains available and uses the same H3 application and Studio runtime as the Nitro deployment.

The package exports the server factory and the ./main command entry for integrations that embed Tessera Studio.