Seif

data/streaming infra @ shopify

[Seif @seifAndSoundTO]

Ended up publishing the Claude Code proxy. Vibe coded, but still a really fun tool to use to understand how this stuff works.

You can see things like system prompts, implicit system-instruction injections, and how it proactively calls the Read tool when files change mid convo.

[Seif @seifAndSoundTO]

@preshdkumar @the_wellnessco Huge!! Congrats ❤️

[Seif @seifAndSoundTO]

@scottastevenson Feels like you can’t escape it at times. But funny enough its made me turn to older books and articles a lot more often now.

[Seif @seifAndSoundTO]

@robjama @wesamo__ Great list, but Wanas and Al Zaeem need to be on there

[Seif @seifAndSoundTO]

Operational excellence is under appreciated in general

[Charlie Guo @charlierguo]

OpenAI’s infra team is massively under appreciated

[Seif @seifAndSoundTO]

@JonasScholz19 Have you tried Claude Code’s review plugin? Pretty solid. I’ve also recently been using Pi and writing my own Skills for code review and it’s been great.

[Seif @seifAndSoundTO]

@sebo1738 @Shopify @shop Lmao congrats dude. 2 lessons here - believe in yourself; spurs are shit :)

[Seif @seifAndSoundTO]

Hey @bcherny @trq212, why is this block repeated twice in Claude Code’s system prompt?

[Seif @seifAndSoundTO]

@fahdananta Legend, all the best dude 🙏

[Seif @seifAndSoundTO]

@JonasScholz19 Need a few more of them to fix that state drift

[Seif @seifAndSoundTO]

@JonasScholz19 lol 100% agree. What were you trying to do tho?

[Seif @seifAndSoundTO]

Umm I don’t get the gpt 5 hate… it does pretty well at helping you dig and reason through a problem.

[Seif @seifAndSoundTO]

lol I was wondering why the proxy was getting so much traffic when it first went public

[Ian Nuttall @iannuttall]

This Claude Code proxy tool lets you see the system prompts 👀

It reveals some useful behaviours too:

- Claude injects system reminders into user prompts
- It automatically triggers the Read tool when a file changes mid-conversation

(link below with more details)

[Seif @seifAndSoundTO]

Such a good read.

[Gergely Orosz @GergelyOrosz]

Asked a few companies how they hire FDEs (forward deployed engineers). Head this article from @alexandr_wang referenced a few times as what worked well:

[Seif @seifAndSoundTO]

So bad it had to be intentional

[Air Katakana @airkatakana]

worst graph crime ive ever seen, what the fuck is this

[Seif @seifAndSoundTO]

Also shoutout @freeatnet. Feels good not seeing a random issue pop up for this sorta thing

[Seif @seifAndSoundTO]

A first contribution to the proxy 🥹

[Seif @seifAndSoundTO]

So you can route Claude Code subagents requests to different model providers.

Routing works really well. At least until the next Anthropic update lol

[Seif @seifAndSoundTO]

Getting Claude code subagents to work with different models has been both annoying af and pretty fun.

Going to release it on the proxy next week.

[Seif @seifAndSoundTO]

@preshdkumar The best kind of channel. Love to see it man

[Seif @seifAndSoundTO]

@evansammccann @turbopuffer Sweet, will check it out for sure

[Seif @seifAndSoundTO]

Folks in Canada need to stop sleeping on @turbopuffer. The most exciting Canadian tech startup out there.