Don't Treat 'Module Internals Don't Matter' as Unconditional
Don't Treat "Module Internals Don't Matter" as Unconditional Subtitle: Urgency raises soft boundaries. A rules file pushes back behavior, not understanding. 2026-09-29 The essay Why the Best Software Advice Is the Hardest to Follow splits advice into two kinds: Practical advice: small functions, no magic numbers, clear names. Teachable. Checkable. Judgment advice: a wrong abstraction costs more…
Don't treat module internals as unconditional, wrote an essay titled "Why the Best Software Advice Is the Hardest to Follow". The essay distinguishes between practical advice and judgment advice. The core message is that the most valuable advice is the hardest to follow because it relies on judgment, not a rule. The essay argues that people should focus on the business, cut, boundary, and contract, rather than getting caught up in module internals.
It also warns against treating the inside of a module as something AI can handle blindly, as urgency and lack of proper boundaries can lead to problems. The essay concludes that high delegation of module internals to AI is not a zero-constraint situation, as readability, testability, and performance remain important.
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