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Show HN: ChartDB Agent – Cursor for DB schema design

https://app.chartdb.io/ai
33•guyb3•1h ago
Last year we launched ChartDB OSS (https://news.ycombinator.com/item?id=44972238) - an open-source tool that generates ER diagrams from your database (via query/sql/dbml) without needing direct DB access.

Now we’re launching the ChartDB Agent.

It helps you design databases from scratch or make schema changes with natural language.

You can:

- Generate schemas by simply describing them in plain English

- Brainstorm new tables, columns, and relationships with AI

- Iterate visually in a diagram (ERD)

- Deterministically export SQL script

Try it out here - https://chartdb.io/ai - no signup required.

Or sign up and use it on your own database

Would love to get your feedback :)

Comments

quentindanjou•40m ago
This is really cool! Would love to use that for quite a bit of prototyping on some personal projects!

Only thing I kinda dislike is the low readability of the connection because of that border around the table of the same color as the connection lines (I think things would look cleaner without it)

apwell23•38m ago
what makes this an "agent"
uxhacker•37m ago
And when will it do class designs? Maybe this would solve many an AI coding issue.
OsrsNeedsf2P•35m ago
What can this do that Claude Code cannot? Is it just the ERD?
pella•33m ago
"an open-source tool" --> https://github.com/chartdb/chartdb

prompts:

https://github.com/chartdb/chartdb/blob/c3c646bf7cbb1328f4b2...

daxfohl•31m ago
Wow, how can you afford offering free AI on the homepage for an OSS project? I can barely afford AI APIs even for my own personal use. Seems like it would drive costs through the roof.
trjordan•27m ago
My conversation

"Design a schema like Calendly" --> Did it

"OK let's scale this to 100m users" --> Tells me how it would. No schema change.

"Did you update the schema?" --> Updates the schema, tells me what it did.

We've been running into this EXACT failure mode with current models, and it's so irritating. Our agent plans migrations, so it's code-adjacent, but the output is a structured plan (basically: tasks, which are prompt + regex. What to do; where to do it.)

The agent really wants to talk to you about it. Claude wants to write code about it. None of the models want to communicate with the user primarily through tool use, even when (as I'm sure ChartDB is) HEAVILY prompted to do so.

I think there's still a lot of value there, but it's a bummer that we as users are going to have to remind all LLMs for a little bit to do keep using their tools beyond the 1st prompt.

IChooseY0u•11m ago
isnt this what the agents are for, you assign them jobs to make changes then evaluate those changes. there is a necessary orchestration piece and maybe even a triage role to sort through things to do and errors to fix
sergiotapia•15m ago
to save tokens you should have a pre-baked replay play when you click those buttons i just want to see the end result and the process sped up since i dont know what the service does. good luck!
thomask1995•11m ago
This is super cool!

Have you thought about making a tool to help preview/dry run migrations?

I feel that's something I would want a ton of confidence in if an LLM is making migration scripts.

Especially if it's doing scary stuff like breaking up a table.

Has anyone built prod ready app with LiveView Native?

https://twitter.com/bcardarella/status/1973369656829166004
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