GitHub

GitHub has launched ReviewBench, an open benchmark for evaluating AI code review agents. According to GitHub, it uses representative pull requests, multi-source ground truth, calibrated evaluation, and production-aligned metrics. Dataset size, model scores, and licensing details were not included in the announcement summary.

GitHub has published a beginner's guide to canvases in the Copilot app, a feature that lets users describe an interface in natural language and have the agent build a live, interactive surface. The feature targets users who want custom workflow tools without writing code.

GitHub's engineering blog makes the case that chat boxes aren't the right interface for every developer task, pointing to canvas-style UIs as a more tangible alternative within Copilot. The post is a design philosophy piece rather than a new model or feature launch.

GitHub has re-engineered the diff-viewing surface inside the GitHub Copilot app to support pull requests spanning up to a million lines of code with hundreds of inline comments. The change addresses performance bottlenecks that previously made large-scale code review sluggish or unusable.

GitHub has introduced local sandboxing in the GitHub Copilot app, a configurable feature that limits access to files, network resources, and credentials on a user's machine. The change targets risk reduction from unintended or unexpected command execution during agentic coding sessions.

GitHub has updated Copilot CLI's C++ code intelligence with whole codebase indexing, targeting performance in large repositories with millions of lines of code. The change addresses navigation and context challenges specific to deeply interconnected C++ source trees.

GitHub used its own Copilot agent to help migrate the Copilot runtime to Rust, producing roughly 800,000 lines of production code. The company says the scale of the rewrite would not have been feasible without agentic coding assistance.

GitHub has released Project HydraFusion as a research preview in GitHub Copilot, an orchestration system that routes coding tasks across multiple models. GitHub claims its selective workflows matched or exceeded an Opus 5 baseline in offline evaluations while cutting estimated workflow cost.

GitHub has published a beginner-focused guide explaining how to run multiple Copilot agents concurrently within the GitHub Copilot app. The post walks new users through the workflow of parallel agent execution rather than announcing a new model or feature.

GitHub published details on how it approaches cost efficiency in Copilot, arguing that optimizing for shorter individual outputs can backfire by increasing retries and wasted work elsewhere in a coding task. The company frames efficiency as a full-task metric rather than a per-response one.

GitHub has released a new integration bringing GitHub Copilot's agentic CLI and app capabilities into Slack via public preview. Users can now interact with @GitHub directly in Slack channels to trigger Copilot actions.

GitHub Copilot for JetBrains now supports enterprise managed settings, letting administrators enforce consistent policies for plugin governance, MCP server access, OpenTelemetry, and permission modes across their organization.

GitHub published a blog post arguing that canvas-style interfaces—rather than chat logs—are better suited for tracking and steering agentic coding workflows in Copilot. The post frames canvases as a way to keep long-running agent work visible and controllable without re-running expensive steps.

GitHub published a guide showing how four Agent Apps can handle scoping, security review, rollout, and shipping of features directly inside GitHub, without switching tools. The post frames Agent Apps as a way to consolidate software delivery workflow steps into the GitHub platform.

GitHub has released a Copilot SDK for Java, allowing enterprise developers to programmatically drive GitHub Copilot using idiomatic Java constructs like annotations and virtual threads. The release extends Copilot's SDK ecosystem beyond its existing language support.

GitHub Models, the unified LLM API and playground that let GitHub Actions workflows make free AI calls using existing GitHub credentials, has been fully retired. GitHub has not disclosed a reason, though rising inference costs from coding-agent usage are the likely driver.

GitHub has updated its Copilot usage metrics API to include activity data from agent apps such as Claude and Codex operating within GitHub workflows. The change gives organizations visibility into third-party agent usage alongside native Copilot metrics.

GitHub has published a guide covering slash commands available in the GitHub Copilot app, designed to extend Copilot beyond simple chat into planning, team collaboration, task automation, and workflow customization. The guide targets developers looking to get more structured, repeatable value out of Copilot's interface.

GitHub has retired the Copilot Billing Preview app, removing it from availability entirely. Copilot spend tracking and management now happens directly within GitHub's standard billing settings.

GitHub has added stacked sessions and pull requests to the GitHub Copilot app, allowing developers to break large coding tasks into a sequence of dependent Copilot sessions that each produce their own PR. GitHub demonstrated the feature by using it to modernize an old codebase.