Autonomous Coding: JetBrains Mellum-4 Redefines the Agentic Workflow

As of June 29, 2026, JetBrains has officially integrated Mellum-4 across the IntelliJ ecosystem, enabling "Project-Aware Autonomy." The new Agent Client Protocol (ACP) allows AI agents to independently manage complex refactorings and dependency resolutions across distributed microservices. This update marks a shift from simple code completion to agentic orchestration, where the IDE proactively identifies architectural technical debt and proposes multi-file solutions.