The cost of saying yes has changed
GitHub argues that AI has lowered the cost of writing code but not the cost of reviewing or owning it, shifting engineering decisions from upfront scope debates to faster, evidence-based evaluations of small changes.
The useful question is what changes for users, developers or buyers, and whether the announcement stays industry context or becomes something people can actually use.
Traditionally, the most expensive part of a software change was writing the code, but AI tools now generate small patches quickly. The real bottleneck has shifted to the time spent debating whether a change is worth making, often without concrete evidence. Engineers previously relied on upfront scope discipline to avoid costly mistakes, but this approach is less effective when the first attempt is cheap. The new challenge is distinguishing between changes that are truly small and those that carry hidden risks, such as touching critical systems or contracts.
AI can produce a candidate patch in minutes, turning abstract debates into concrete artifacts that can be reviewed. This allows teams to replace vague questions like 'is this in scope?' with evidence-based assessments, such as examining a four-line diff with a passing test. However, the generated code is only a starting point; the real cost lies in validating, owning, and maintaining the change. A patch that is technically correct but nobody wants to support is not a cheap solution, and some changes still warrant a hard no regardless of how easily they are written.
To adapt, teams are advised to ask for constrained attempts before committing to a change. This means producing the smallest possible patch, keeping it behind feature flags, avoiding public contract changes, and thoroughly testing the result. If an agent cannot produce a clean patch under these constraints, the request is likely more complex than it appears. If it can, the team gains clarity on the actual cost before making a decision. This approach replaces speculative scope arguments with direct evidence, enabling faster and more informed choices.
The shift means engineers must now focus on pricing uncertainty quickly rather than reflexively saying yes or no. The best engineers will be those who can identify when a request is a product decision disguised as an implementation task, when review will be harder than writing, and when a change is small enough to try immediately. This new dynamic reduces time spent guessing and increases time spent evaluating concrete outcomes, fundamentally changing how software changes are assessed and approved.