
Simon Last
2.1K posts


Sharing a few of my favorite prompt snippets for coding:
For iterating on a spec:
Please step back and think again. How can we make this SIMPLER and DUMBER while still achieving our goals?
For planning:
Please research the codebase to make sure you fully understand how stuff currently works, and make a detailed plan to achieve the above.
Your plan must be fully fleshed out and include only concrete actions such as editing files and running commands (ie. your plan cannot include actions like “read this file”).
Your plan must also include how you will verify it is correct yourself, end-to-end.
Don’t make any code changes yet. Research now as much as you need and then chat back with your full plan when ready.
For debugging:
Please think carefully and truth seek. Don't just blindly re-run things and hope they will work. Read the code, and liberally add temporary logging statements anywhere in the codebase to verify logic works as you expect (just remember to not commit them). Dig deep and take the time to really figure out the root causes of problems.
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Our cofounder @SimonLast hasn't written a line of code since last summer.
With custom agents running while he sleeps, entire products get built without him touching the keyboard.
Custom agents run his inbox. Route bugs. File tasks. Search across Slack, Drive, and Notion—and find him answers, not links.
He sat down with @Saranormous on @NoPriorsPod to share what it looks like when the entire company runs on agents.
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MCP sucks honestly
It eats too much context window and you have to toggle it on and off and the auth sucks
I got sick of Claude in Chrome via MCP and vibe coded a CLI wrapper for Playwright tonight in 30 minutes only for my team to tell me Vercel already did it lmao
But it worked 100x better and was like 100LOC as a CLI
Morgan@morganlinton
The cofounder and CTO of Perplexity, @denisyarats just said internally at Perplexity they’re moving away from MCPs and instead using APIs and CLIs 👀
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@simonlast 1) i dont want magic link auth ever when we have saml configured
2) it still forgets the nextUri/redirectUri value in some cases
i use notion once a month so couldnt tell you how to repro (2) or how regular it is
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Simon Last retweetledi

Our cofounder @simonlast built the first Custom Agent at Notion. It had one job: route product feedback.
Then he gave it a blank page and let it figure out the rest.
Now the whole company relies on it 👀
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With Notion Workers, you can build a custom integration that connects your custom agent to pretty much anything, usually in under 10 minutes!
Jonathan Clem@_clem
Alongside Custom Agents, we're also quietly releasing an "extreme pre-alpha" of something called Notion Workers. I joined Notion dreaming we would one day make it a developer platform, and this is just the start! github.com/makenotion/wor…
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Custom agents are here – I'm so proud of the team for this launch!
My personal favorite: I set up an email triage custom agent a few months ago and it completely solved email for me. I get a daily recap of what I need to see, and anything I don't is automatically archived.
Notion@NotionHQ
Introducing Custom Agents. The AI team that never sleeps 🌙 They’re autonomous, built for teams, and easy for anyone to build. Give them a job, set a trigger or schedule, and they'll get it done 'round the clock.
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@brian_lovin That’s purely my emotions, I haven’t tested scientifically 😆
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@simonlast Since you think about this a lot more than anyone: does capitalizing words for emphasis actually work? Or placebo?
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Simon Last retweetledi


@dylan522p Try buying something… I bought an advent calendar and now 100% of my ads are advent calendars 😅
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When the reccomendation systems starts serving me low quality mobile game ads in between my slop doom scrolling, I get sad
My ad auction is worth more than this please advertisers
It's a validation that the recsys doesn't view me as worthy for expensive hyper targeted ads 😭
San Francisco, CA 🇺🇸 English
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