You might as well just write instructions in English in any old format, as long as it's comprehensible. Exactly as you'd do for human readers! Nothing has really changed about what constitutes good documentation. (Edit to add: my parochialism is showing there, it doesn't have to be English)
Is any of this standardization really needed? Who does it benefit, except the people who enjoy writing specs and establishing standards like this? If it really is a productivity win, it ought to be possible to run a comparison study and prove it. Even then, it might not be worthwhile in the longer run.
The "bitter lesson" only applies if the model makes the agent redundant. We aren't there yet. Agentic loops are just software engineering on top of CS constructs; they help current models produce better results.
Could models eventually internalize the logic used in Claude Code / Codex / OpenCode / Aider? Maybe. But for now, keeping that complexity in the agent is more energy-efficient. Even if complex agents eventually get replaced by simple loops, these standards save tokens and time today. That’s worth something.