Hot take: AI skills getting obsolete after months

The post argues that several AI-related skills are becoming obsolete within months: context management is handled by automatic compaction in modern harnesses, prompt engineering is deprecated because models can recreate complex software from a one-liner, and sub-agent harnesses like Codex and Claude Code spawn sub-agents automatically without an extensive ecosystem. It also questions whether loops/goals are still necessary and whether Agents.md is a waste of tokens, citing https://arxiv.org/pdf/2602.11988. Two edits note a LinkedIn discussion at https://www.linkedin.com/feed/update/urn:li:activity:7517578946054447104/ and a comment by Andrej Karpathy that his prompts are getting shorter because over-specifying constrains the model.