Agentic coding lowered the cost of change and raised the cost of holding invariants
_AustinCalvert_ · x · 2026-10-01
rjs offers a pithy take on agentic coding's real impact: as AI slashes the cost of changing code, the scarce engineering resource shifts to holding invariants — architectural constraints, contracts, and core assumptions. Engineering focus moves from "how expensive is it to write code" to "what must never break."
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