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0 pointssimonw4mo ago0 comments

You can prototype this without writing any code at all.

Fire up "claude --dangerously-skip-permissions" in a fresh directory (ideally in a Docker container if you want to limit the chance of it breaking anything else) and prompt this:

> Use Playwright to fetch ten reviews from http://www.example.com/ then run sentiment analysis on them and write the results out as JSON files. Install any missing dependencies.

Watch what it does. Be careful not to let it spider the site in a way that would justifiably upset the site owners.

0 comments

sumedh4mo ago

Dont you need to setup Playwright MCP first?

simonwOP4mo ago

No. I don't use Playwright MCP at all - if the coding agent can run Python code it can use the Playwright Python library directly, if Node.js it can use the Playwright Node library.

8cvor6j844qw_d64mo ago

Oh wow Simon Willison, I've read some of your submissions on HN and its very informative.

Thank you very much for the info. I think I'll have a fun weekend trying out agent-stuff with this [1].

[1]: https://vercel.com/guides/how-to-build-ai-agents-with-vercel...

sumedh4mo ago

Interesting, thanks for the info.

I wanted to run claude headlessly (-p) and playwright headlessly to get some content. I was using Playwright MCP and for some reason claude in headless mode could not open playwright MCP in headless mode.

I never realized i can just use playwright directly without the playwright MCP before your comment. Thanks once again.

j / k navigate · click thread line to collapse

0 pointssimonw4mo ago0 comments

You can prototype this without writing any code at all.

Fire up "claude --dangerously-skip-permissions" in a fresh directory (ideally in a Docker container if you want to limit the chance of it breaking anything else) and prompt this:

> Use Playwright to fetch ten reviews from http://www.example.com/ then run sentiment analysis on them and write the results out as JSON files. Install any missing dependencies.

Watch what it does. Be careful not to let it spider the site in a way that would justifiably upset the site owners.

0 comments

sumedh4mo ago

Dont you need to setup Playwright MCP first?

simonwOP4mo ago

No. I don't use Playwright MCP at all - if the coding agent can run Python code it can use the Playwright Python library directly, if Node.js it can use the Playwright Node library.

8cvor6j844qw_d64mo ago

Oh wow Simon Willison, I've read some of your submissions on HN and its very informative.

Thank you very much for the info. I think I'll have a fun weekend trying out agent-stuff with this [1].

[1]: https://vercel.com/guides/how-to-build-ai-agents-with-vercel...

sumedh4mo ago

Interesting, thanks for the info.

I never realized i can just use playwright directly without the playwright MCP before your comment. Thanks once again.

j / k navigate · click thread line to collapse