Christian Kjær (@codetalkio) header
Christian Kjær (@codetalkio) profile picture

Co-Founder/CTO at Yaay (https://xitter.cf/t.co/1h6XFyTBlI) building the taste layer for the physical world 🌞 •• ✍️ at https://xitter.cf/t.co/fOGJfINDR6 •• https://xitter.cf/t.co/T286gLOCPe

Copenhagen, Denmark
Joined January 2010
Photo by Christian Kjær (@codetalkio)Photo by Christian Kjær (@codetalkio)Photo by Christian Kjær (@codetalkio)Photo by Christian Kjær (@codetalkio)Photo by Christian Kjær (@codetalkio)Photo by Christian Kjær (@codetalkio)Photo by Christian Kjær (@codetalkio)Photo by Christian Kjær (@codetalkio)Photo by Christian Kjær (@codetalkio)Photo by Christian Kjær (@codetalkio)
i just don’t understand why people keep thinking Penix is a viable QB for the Falcons he’s too stationary making him predictable, too injury-prone making him take less chances, and just hasn’t proven it at all yet
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loosing to Tampa was just insane tbh, they made history in horrible QB stats both teams in that game wtf 😅
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monorepos are 100% without a doubt a benefit for agents type checking across your entire stack, the knowledge of how everything interacts, and atomic changes across the entire stack and infra
When I first told @MParakhin that we were planning to move to a monorepo he said wisely: Moving to a Monorepo is an idea that every engineer absolutely hates, and that once its there, no engineer would ever want to work at a company that doesn't use one. We will definitely do it.
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REST is for spaghetti code, GraphQL is for structure enforcing structure on agents is good therefore GraphQL is good
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got my boy Claude to go ham on the rust graphql library we were using (async-graphql) because the compile times were insane not only did it reduce compile times of cold builds by ~40% and rebuilds by ~80% but also reduced allocations by ~60% zero runtime regressions 👌
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crazy if falcons are the ones to stop the 49ers win streak this team is really all over the place lol
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i think i might have jinxed it 😅
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Airbnb was (and often still is) getting access to someone’s private home to stay in Leaving trash in someone’s home is weird But many hotels etc are now on the platform, so the service expectations have shifted, and now the experience varies extremely from place to place
Airbnb’s problems in a nutshell Too many hosts view it as a way to make easy money: charging hotel rates, plus cleaning fee, then mandate guests do all cleaning But all customers expect this to be a hospitality service I never consider Airbnbs exactly because of such hosts
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Airbnbs have usually been my best stays, still by far my preferred way to travel Hotels often give you very little value unless you pay a lot This differs across the world of course, but most airbnb hosts I’ve been at have been lovely and helpful people!
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what a weird uninformed opinion to state publicly?…
What’s happening in Paris and Milan is no surprise to anyone who has spent time around young people in Europe during the 2010s: Virtually all of them were working on their 4th masters degree in social welfare, were unmarried, attended communist dinners every night, and regularly participated in riots. Now the economy is suddenly transforming and they have nothing to show for it.
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if anything, I’m proud that French people actually had the balls to stand up to a government that is not delivering progress and changing the status quo rarely happens quietly
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the crazy thing is, despite the French doing much more intense protesting, the risk of getting killed/shot by the police is astronomically lower than the US
Nothing like a French cost of living riot to remind you that America has some of the quietest street politics in the Western world
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wishing someone put in as much effort into speeding up the Rust compiler as we are getting in typescript right now 😭 if buns aot delivers then I go back to full ts for everything (right now we mix rust and ts)
Cool ship! It's faster than my port (ts-rust aka tsc-rs) in most things. I heard that they wanted to ship earlier but delayed because my --fast mode beat them 🤣 That said, it looks like tsrs is the real winner
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if your infra is not defined in code you’re not gonna make it tbh
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Could not have come at a better time 👀
Replying to @deepseek_ai
🔍 Search & Fetch APIs are now open to everyone! Powered by our in-house search engine, serving hundreds of millions of requests daily worldwide. 💰 Each endpoint: $0.75 per 1,000 calls. 📖 Docs: api-docs.deepseek.com/guides… 📌 Search & Fetch calls via server-side tools in DeepSeek Harness, Claude Code, and Codex are currently free for DeepSeek API users. Billing starts Oct 31, 2026, at 16:00 UTC. 3/4
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I guess there’s a fundamental difference in what you use comments for static checks is ideal, but for me comments are there for the *why* static checks can’t cover this, it gives context for humans and agents alike, and is crucial for maintainability IMHO
Replying to @abimaelmartell
• comments go stale very quickly and confuse agents and people • they are often used by agents to explain workarounds that would've been better off actually fixing the code instead • they are not enforceable and waste your agents' tokens my point is that moving prose (comments, rules, agent.md, skills) into deterministic lint rules, better API design/types, is far more effective, enforceable, and token efficient. comments are simply a crutch that agents will happily misuse
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reviews are better “did it do achieve the goal” removing code later becomes easier “we no longer do or need this” the hardest to maintain codebases that i’ve been in are littered with “i’ve no idea what this is supposed to do, and now we don’t know if it’s safe to remove”
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Christian Kjær retweeted
YES! It's out it's out, I am SO excited for this! #AWSLambda Web Functions are a game changer! A true HTTP request handler and Each execution environment handles multiple requests simultaneously (up to 128 concurrent requests per environment). Multi-region deploy, and so much more! -> aws.amazon.com/blogs/aws/ann…
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