@WallisDev @samlambert @euboid @getsentry Add to your prompt the same things you look for when determining if you would spend time on a fix. Takes a few attempts to get it right.
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Mike Coutermarsh
19.3K posts
Mike Coutermarsh
@mscccc
Building really fucking fast MySQL and Postgres databases @PlanetScale
Pennsylvania, USA Katılım Aralık 2009
1K Takip Edilen10.9K Takipçiler
@samlambert @euboid @getsentry How do you filter out the noise in the sentry error reports
Stuff like people on bad ISPs unable to reach a random edge
Do you just have your agent ignore the errors you silence
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Has anybody figured out how to do this?
- @getsentry issue reported
- codex agent spun up with access to sentry + axiom logs & traces
- Draft PR auto-created w/ root cause analysis + fix
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Mike Coutermarsh retweetledi
We've been building an internal Claude Code plugin system at Intercom with 13 plugins, 100+ skills, and hooks that turn Claude into a full-stack engineering platform. Lots done, more to do. Here's a thread of some highlights.
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@nateberkopec GitHub does it. They got it landed in to rails blog.saeloun.com/2020/02/19/rai…
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@mscccc you've talked before about "send all gets to reader, send all POST to primary" on a per request basis IIRC? Where was that done? And how did you handle post -> redirect -> get not having stale info for the final GET?
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Just sent this to our designer. He's been typing for 1 minute.
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@edwinarbus @cursor_ai I have noticed cursor with opus seems to give me better results than using claude code directly!
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Matt Maher tested frontier models in Cursor v. other harnesses. Cursor boosted model performance by 11% on average:
Gemini: 52% → 57%
GPT-5.4: 82% → 88%
Opus: 77% → 93%
His benchmark measures how well models implement a 100-feature PRD. @cursor_ai consistently outperformed.
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@nateberkopec Read this as Rails 3.1 at first and was thinking. Hell ya that was a good version
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It's pretty rare these days to be on a version this old, but if you're still running Ruby 3.1 in production: it's worth upgrading to 3.2+ purely to get YJIT.
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You need to be groin maxing.
No one cares about your bench after 30. What’s your Copenhagen max
ris ꩜@sealmath
PSA TO WALKERS! my dad used to walk like 15-20k everyday and his outer thigh muscles are much stronger than his inner thigh muscles which puts a lot of strain on his knees. his doctor told him to not walk as much/climb stairs and his knees hurt 24/7. do inner thigh workouts guys
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@TheThing89 @rbranson I’m too young to know what any of that means but old man Ricky b should understand
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@rbranson @mscccc I think these graphs often calculate "response time" as a full round-trip
Also this is 2013 when we had Intel Pentium and AMD FX
Also also, that was the dawn of SSDs becoming becoming consumer mainstream
67ms back then for full roundtrip, including multiple database trips is fine
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Rails and MySQL
Sam Lambert@samlambert
GitHub's performance in 2013. The web used to be so fast.
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@DRBragg N1s & indexes mostly so far. Having it monitor for sentry errors is working well too, it's auto opening fixes for them. Blessed
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@mscccc Awesome, but what _kinds_ of things is it finding? Missing indexes, unoptimized queries, something else?
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Hook the PlanetScale MCP up with Cursor Automations and you have a self improving database.
We've been running this for the past week. Schema recommendation -> Launch Cursor cloud agent -> Use MCP data + dev environment to open a pull request with schema changes.
Cursor@cursor_ai
Discover and apply schema recommendations, improve query performance, and work with your data in natural language with the PlanetScale plugin.
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@rbranson I can fit like 67 sql queries into that bad boy if I put my DB in the same region as my app
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@samlambert Prompt examples for a Rails app gist.github.com/mscoutermarsh/…
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Mike Coutermarsh retweetledi
PlanetScale Insights can kick off Cursor Automations and have agents fix your schema and queries.
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@DRBragg gist.github.com/mscoutermarsh/…
It’s insane, try it. I have it monitoring prod data from sentry and our database, then fixing things.
These are all perf related ones, you can have it just triage and fix errors as well
Opus 4.6 seems best for rails
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@MaazChowdhry @cursor_ai That’s only if it runs on your machine. I use the cloud agents a lot and previously they couldn’t sign commits
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@mscccc @cursor_ai If they are using your git cli then it was always possible no? Or are they signing as cursor?
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@edwinarbus @cursor_ai My hero
I had a horrifying bash script doing this for me before. Now I can delete it
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@mscccc @cursor_ai that be anatole who i don’t think is on this site!! will share with him
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@logscore Don’t think so, he loves this stuff.
I would not give ai unsupervised write access to my prod database.
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Mike Coutermarsh retweetledi
you guys will literally never know what it was like to stack creatine with androstenedione and animal paks, and rip chest flys after school then sit on a curb waiting for a ride while ripping a blade of grass apart
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