Copilot harness generally available in Copilot for JetBrains

Published August 25, 2026 · Category: AI Create

Overview

This update brings Copilot harness to generally availability. You also get more stable account, model, and MCP experiences.

What’s new

Copilot harness generally available

Copilot harness is now generally available, providing faster feature delivery and better code quality.

Built-in JetBrains MCP server support

The built-in JetBrains MCP server support is now in public preview. This makes it easier to expose IDE capabilities through MCP-driven agent workflows without relying only on external server setup.

Details

Better post-update release discovery

After you update the Copilot for JetBrains plugin, a What’s New tab will open so you can immediately see what changed. This helps you adopt new capabilities faster and reduces guesswork after each upgrade.

Expanded Copilot harness integrations

You can use Copilot harness /review integrations directly in JetBrains, reducing context switching when you want review guidance during development.

User experience enhancements

This release improves daily interaction quality across model controls, debug workflows, long outputs, and workspace customizations.

• Model management: Improved search behavior, clarified search actions, and enabled resizable columns in the language model table.
• Debug workflows: Improved event-time sorting, token-usage filtering, and layout behavior in debug-log exploration.
• Chat ergonomics: Improved long tool-output scrolling and added shortcuts for send options.
• Multi-root customization discovery: Improved customization handling by discovering customizations across all folders and honoring client-provided customization locations.

Quality improvements

This release improves reliability for account detection and sign-in flows, MCP schema and tool-state handling, BYOK and model-refresh behavior, and Copilot agent session continuity after resume. It also fixes editor and rendering defects, restores file and folder # references in Copilot, Claude, and Codex chat inputs, and resolves worktree session startup failures for projects opened from WSL.

Try it out and share your feedback

Try out the latest version of the GitHub Copilot plugin and share your feedback. Your input is invaluable in helping us refine and improve the product. We’d love to hear about your experience in the following channels:

• In-product feedback: Use the feedback options within your IDE.
• Feedback repository: Share your thoughts in the GitHub Copilot for JetBrains IDEs issues.

The post Copilot harness generally available in Copilot for JetBrains appeared first on The GitHub Blog.

Source

Originally published at github.blog.

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