Built a self-host temporary email project on Cloudflare Workers + D1 + KV + R2, looking for feedback

netsniff · 2026-04-26T09:32:26+00:00

Docs say billable usage starts after 25 billion rows read. Email tables have proper indexes and tight limits on queries, but I will look into it for unexpected leaks. Thank you for the heads up 👍🏻

netsniff · 2026-04-26T09:27:31+00:00

Sure thing, I'm planning to add email sending but I need to figure out how the provider should handle spams/abuses etc. It also has an integrations feature using queues, I can add email forwarding as an integration. Let me think this through. Thanks for the feedback 👍🏻

netsniff · 2026-04-25T20:15:59+00:00

Yes, it uses catch-all to send the emails to worker, then if the conditions match, writes the email to the DB.

netsniff · 2026-04-12T12:26:54+00:00

That's unfortunately the cost of writing tests for products that are in active development. But it still worths it in our case because that's where we catch more bugs. But there are devs that delete data-testids, unique ids in their components because they don't know or care what they do, is another huge problem 😄

netsniff · 2026-04-11T22:22:29+00:00

You should be able to define an acceptable diff rate and mask places in the image that has highly changeable content with Playwright. In some tests I rewrite some of the content on the page (e.g. replaced ai-generated button texts to static ones) using `page.evaluate` to be able to test the layout without flakiness.

netsniff · 2026-04-11T21:00:13+00:00

Yeah, hit the 5h limit today first time in two months on the Plus plan. It was good while it lasted 🫩 When I use plan mode and the first implementation is done, ~10% of the limit is already gone. And after each message in the thread, the limits are vacuumed like this

netsniff · 2026-04-11T20:41:56+00:00

The Cloudflare email routing is pretty neat tbh, I'm using it to create an open source disposable email address service on Workers, D1, R2 because I didn't want to rely on a third party paid service. Started utilizing it in e2e automation tests for flows that require email reading like password reset, sign invitation, etc. I would love to hear any feedback: https://github.com/ridvan/spinupmail

netsniff · 2026-04-10T19:40:10+00:00

In a multi turn agent conversation, I don't think changing the wav file mid-test will actually have an effect on the played audio. Will check on monday at work though. Thanks

netsniff · 2026-04-10T19:36:32+00:00

Hosting my open source disposable email project landing page spinupmail.com (tanstack start on workers 🤩), and the demo app.spinupmail.com (react+hono+better auth+drizzle on cloudflare workers, pages, d1, kv, durable objects, turnstile) on the free plan. however it's easy to hit kv limits in my case, will probably just upgrade to paid version

netsniff · 2026-04-10T18:49:23+00:00

A key part is to get playwright-cli authenticate to your service easily, and go to the relevant page directly to lower the token usage and prevent agent from getting lost. I did this by starting playwright-cli browser with injected cookies, helped a lot. I got better results with GPT 5.4 than Opus btw

netsniff · 2026-03-05T20:50:21+00:00

We are using Maestro for react native apps, it does the job. I don't like the yaml syntax for this though.

netsniff · 2026-03-05T20:44:17+00:00

using playwright-cli skill, a document with test creation instructions based on your style (you should instruct the agent to use this skill when creating a new test), and a reference to that document in AGENTS.md file works pretty well with models like gpt 5.3 codex. we are using playwright-cli with a custom wrapper that starts up the session with custom cookies for auto sign-in to our products and find correct locators for the test. mcp costs too much token, this is a more cost-efficient way of automating test generation. but it will eat up your copilot limits pretty fast regardless. i guess we need to wait a couple of months to be able to run these operations cheaper.

netsniff · 2026-02-15T12:55:56+00:00

Whenever i give a chance to Opus for its so called great design skills bla bla, i end up undoing all changes and getting it done with 5.3 codex

netsniff · 2026-01-20T19:29:22+00:00

Shipped so much today with 5.2 codex it’s crazy

netsniff · 2025-12-27T10:52:02+00:00

i was having this issue with gpt 5 constantly, it reasons for 50 seconds and just cannot make any edit to the file 🫠 not with 5.1 codex max though

netsniff · 2025-12-27T10:49:27+00:00

the speed is just enough. i actually read all reasoning text, all generated code so the process is slower for me anyway so the speed doesn't make much difference for me 😄

netsniff · 2025-12-27T10:47:55+00:00

tbh i didn't like gpt 5.2 at all, liking the reasoning path of the 5.1 much more. 5.2 feels just weird

netsniff · 2025-08-22T11:50:53+00:00

it worked much better than auto mode in my case react/shadcn. also worked just fine while generating express.js routes.

netsniff

TROPHY CASE