AI BriefingStudy on Early 2026 Adoption of Claude Code and GitHub Copilot CLI
Key point
A study of Microsoft engineers found that adopting CLI AI agents increased PR merges by about 24%.
Details
An analysis of early 2026 adoption cases at Microsoft found that agentic CLI tools like Anthropic's Claude Code and GitHub Copilot CLI have a real impact on engineers' productivity.
The key findings of the study are as follows:
- Productivity gains: After adopting the tools, engineers saw their Pull Request (PR) merge count increase by about 24%, and this effect persisted throughout the 4-month observation period.
- Diffusion pattern: Initial spread of the tools occurred mainly through peers' Social Networks.
- Retention: Continued use of the tools was more closely tied to individual coding activity volume than to users' demographic characteristics.
The study suggests that CLI coding agents are not merely a novelty effect, and that when organizations design adoption strategies, it is critical to make peers' use cases visible.
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