AI became a generational change in November 2025, primarily because coding harnesses such as Claude Code turned from shell scripts into serious infrastructure.
Charity Majors identifies November 2025 as the point when her view of AI shifted from skepticism about its generational impact to seeing it as transformative. She credits the coding harness, especially Claude Code, more than the underlying model alone.
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Charity Majors: Charity’s turning point in seeing AI as a generational change was in November 2025. This was due to Opus 4.5, but Charity argues that the coding harness (Claude Code) made the bigger difference. Because thanks to Claude Code, harnesses went from being more of a shell script to serious infrastructure.