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On the evening of Saturday, 14 March 2026, I shipped a fix for intermittent database connection failures and then wrote the release note. Two days later, on Monday morning, looking at the same errors
Everyone reaches for a bigger model when the small one disappoints. I did too — I read my 8B's failures as a verdict: too small for this. But big-versus-small is the wrong axis. The real question is w
In Node, when I need to stop two requests from hitting a resource at the same time, I reach for a library: import pLimit from 'p-limit'; const limit = pLimit(1); // one at a time await limi
You are given an array nums. Move every 0 to the end, keep the order of everything else, and do it in place. [0, 1, 0, 3, 12] → [1, 3, 12, 0, 0]. The lazy fix is to delete each zero and append it. Wa
In Nest I give every request an id with a counter. One line, and I never think about it again: let seq = 0; function requestId() { return `req-${++seq}`; // safe. always. } It's safe in Node becaus
You are given an array height, where each element is a vertical line. Pick two of them. Together with the x-axis, they form a container. Return the most water it can hold. Your first instinct is to t
Goddamn local models can't follow a single instruction. I had a sub-agent for product discovery. The persona told it, in Korean: "you're 기획자 (planner). Greet the user. Confirm the topic. Ask Step 1's
By the end of the last post the FastAPI app resumed correctly — the planner picked up my reply instead of restarting. But I don't develop against FastAPI. I develop against uv run langgraph dev, so I
The planner asked a clarifying question. I typed "character stat-based combat simulation." The planner responded. It hadn't seen what I wrote — same opening again, as if turn 1 had just happened. I as
