During the same window that Microsoft ran its Build 2026 developer conference, Anthropic shipped new features for Claude Code, including a "/fork" command and a refreshed command-line interface aimed at simplifying AI application development and management.
The "/fork" command lets a developer branch an existing Claude Code session into a parallel variant — useful for testing alternative approaches to the same problem without losing the original session state. It's a pattern familiar from version control and increasingly common in AI agent orchestration. Combined with nested sub-agents introduced in an earlier update, the feature gives Claude Code a session-management model that more closely resembles how developers already work with git branches, an intentional design choice that lowers the learning curve for teams comfortable with version control workflows.
The /fork addition follows a broader Claude Code update that brought nested sub-agents (allowing a primary session to spawn coordinated sub-agents for parallel task execution), smarter model and region handling, and a new plugin search interface. Together, the updates point to Anthropic's effort to make Claude Code not just a code-generation tool but an orchestration environment for managing complex, multi-step agent workflows.
The timing is notable. Claude Code has become the fastest-growing product in Anthropic's history and a major driver of the company's enterprise adoption lead, with one estimate attributing 4% of all public GitHub commits to the tool. Rolling out developer-experience improvements during a competitor's flagship conference — Microsoft used Build to unveil seven new AI models, including the reasoning-focused MAI Thinking One — reads as a deliberate counter-move in an increasingly crowded AI coding market that also includes OpenAI's Codex, GitHub Copilot, and xAI's Grok Build. For engineering teams, the practical takeaway is a session model that scales from single tasks to branched, parallel experimentation.
Source: [Geeky Gadgets](https://www.geeky-gadgets.com/gpt-5-6-leaks-microsoft-build-2026/)