IDEAS, DECISIONS & LESSONS
Notes on AI, architecture and building useful products.
904 articles
01 Oct 2026 · 4 min read
english-lesson
Daily English practice for tech professionals. Morning session covering how to frame a proposal, walk people through trade-offs, and land on a decision with pronunciation guide, exercises, and real-world examples.
Read more30 Sep 2026 · 5 min read
architecture
Embed 5 Pro and Fast share one vector space: index once with Pro, query with either model, lose 1.6-2.7% retrieval quality and gain 2.4x query throughput. Here's the actual math for when that trade is worth making.
Read more30 Sep 2026 · 4 min read
ai-agents
1,107 attack attempts, 49 findings, 3 new detection rules. But the number that should change how you test security is the one Cloudflare almost buried: category diversity beat attempt count, every time.
Read more30 Sep 2026 · 5 min read
architecture
Worker Previews spin up an isolated Durable Object namespace and Container per branch with one wrangler command. The service-binding gap is the part worth reading before you wire this into CI.
Read more30 Sep 2026 · 4 min read
architecture
Daily English practice for tech professionals. Morning session covering database sharding and partitioning with pronunciation guide, exercises, and real-world examples.
Read more30 Sep 2026 · 5 min read
ai-agents
At DevDay on September 29, OpenAI turned Codex Cloud environments from one-shot containers into persistent, shareable objects. It's the golden-AMI-versus-cold-start argument, just wearing an agent costume.
Read more29 Sep 2026 · 5 min read
agents
Sonnet 5.5 ships at the same $/token price as Sonnet 5 but does the same work in fewer steps. If your cost dashboard only tracks tokens, you'll never see the win — or the next regression.
Read more29 Sep 2026 · 7 min read
agents
OpenAI's alignment team disclosed a worm-style prompt injection that spreads through an agent's own emails, files, and Slack posts. Most teams only validate input. That's not enough anymore.
Read more29 Sep 2026 · 5 min read
architecture
Uber's error-ownership pattern fixes a bug hiding in almost every service mesh: retries fire at every hop, even when the hop didn't cause the failure. The retry-amplification math explains why, and it's a five-line middleware fix.
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