Added per-user daily AI credit consumption data to the Copilot usage metrics API.
GitHub changelog digest
Jun 15 - Jun 21, 2026. Useful releases, risky migrations, and noisy updates from the GitHub channel.
AI credits consumed per user now in the Copilot usage metrics APIUpcoming deprecation of Opus 4.6 (fast)MAI-Code-1-Flash available on more Copilot surfacesCopilot code review: AGENTS.md support and UI improvementsDetecting Duplicate Issues – Public Preview and issue fields MCP support for GitHub Issues
GitHub updates in 2026-w25
Opus 4.6 (fast) is being deprecated across all GitHub Copilot experiences (Chat, inline edits, ask, agent mode, and code completions).
MAI‑Code‑1‑Flash model is now available across additional GitHub Copilot surfaces.
Added support for repository-level AGENTS.md files in Copilot code review
Introduce public preview of automatic duplicate issue detection to help maintainers triage efficiently
Pull request author search now includes PRs created by the Copilot cloud agent on behalf of a user.
Introduces a repository switcher in the global navigation for quick repository jumps
Introduces the ability to build new custom GitHub Actions runner images using existing custom images as a base.
Updated the checkout action to use safer default behavior for pull_request_target events, reducing token and secret exposure
Introduces workflow execution protections in public preview for GitHub Enterprise, organizations, and repositories.
Release notes now automatically list all pull requests merged since the previous release.
Fixed multiple high‑severity security bugs in TLS, crypto, HTTP/2, DNS, and permission handling (e.g., hostname normalization, WebCrypto output length guard, SNI case‑sensitivity)
Strengthened TLS and DNS security: hostname normalization for server identity, case‑sensitive SNI fix, rejecting hostnames with embedded NUL bytes, and binding reusable sessions to authenticated hosts.
TLS hardening: normalize hostnames for server identity, fix case‑sensitive SNI matching, and bind reusable sessions to authenticated hosts
Introduces two new GitHub CLI commands, `gh repo read-file` and `gh repo read-dir`, to view remote file contents and directory listings without cloning the repository.
Added new partner integrations, expanding secret scanning detection coverage.
Enterprise admins can now disable bypass permissions for Copilot via enterprise-managed settings
Auto mode for Copilot Chat is now generally available to all users on GitHub.com and the mobile app.
Adds a limit on how many open pull requests a user without write access can create in a repository
Introduces Agent Finder, a new capability that automatically selects appropriate agents, skills, and tools for GitHub Copilot.
Sign-ups for Copilot Student, Pro, Pro+, and Max plans will resume gradually over the next weeks.
GitHub Copilot app is now generally available on macOS, Windows, and Linux.
Introduces Open Beta for Snapshots, enabling screenshot diffing in CI pipelines to catch unintended visual changes
Added server‑side telemetry to Copilot usage metrics.
Internal JavaScript packages renamed from @sentry-internal/* to @sentry/*.