ai-development-tools

Replit has released Agent 4, a major update that fundamentally restructures how product teams design, collaborate, and build. The release replaces Design Mode with an infinite Design Canvas, moves from fork-and-merge to shared real-time collaboration, and enables concurrent planning and execution.

GitHub Copilot has reached 60 million code reviews, marking significant adoption of AI-assisted code review workflows. The milestone reflects growing reliance on AI to manage review backlogs as development velocity increases across organizations.

GitHub has expanded its Copilot coding agent with five major features: a model picker for agent selection, self-review functionality, built-in security scanning, custom agent creation, and CLI handoff integration.