Fragments (pieces of I read) - 02.2026

(Inspired by Martin Fowler ) Some pieces from Harness engineering: leveraging Codex in an agent-first world I thought were interesting: About AGENTS.md We tried the “one big AGENTS.md” approach. It failed in predictable ways: Context is a scarce resource. A giant instruction file crowds out the task, the code, and the relevant docs—so the agent either misses key constraints or starts optimizing…