GitHub Copilot CLI — September 2026 Releases
7 releases in September 2026.
What's new in GitHub Copilot CLI, September 2026
GitHub Copilot CLI makes Vim mode general, adds /config and worktree templates
GitHub Copilot CLI's September 2026 releases made Vim mode available to everyone, added a /config screen, and extended sandbox and MCP controls. Seven releases shipped, from v1.0.83 to v1.0.90.
Vim mode turns on with /vim or editorMode set to vim, and transcriptView set to "concise" groups tool activity into expandable summaries. v1.0.87 added a worktreePathTemplate setting for where /worktree, /move, /new and --worktree create worktrees, plus Up in an empty input to recall pending prompts. Sandbox work included /sandbox network host allow/deny rules, sandbox proxies on Windows and sandbox.allowDevToolAccess. MCP gained CIMD support for OAuth sign-in and a --mcp-github-auth flag. Model support grew to include claude-fable-5.1, GPT-6 Astra, claude-opus-5.5 and GPT-6.1 Sol. Remaining changes were fixes for session resume, MCP tool recovery and clipboard handling on Wayland.
- Vim mode is available to everyone via /vim or editorMode set to vim (v1.0.85)
- /config opens a sidebar configuration screen; transcriptView "concise" groups tool activity (v1.0.85)
- worktreePathTemplate sets where /worktree, /move, /new and --worktree create worktrees (v1.0.87)
- Up in an empty chat input takes back pending steering prompts for editing (v1.0.87)
- Custom agents can list several models tried in order; claude-opus-5.5 and GPT-6.1 Sol added (v1.0.83, v1.0.89, v1.0.90)
- -mcp-github-auth scopes GitHub account auth to approved MCP server origins (v1.0.90)
Upgrading from v1.0.82? See every change through v1.0.90.
- v1.0.90 (September 30, 2026) — 2026-09-30 - Add support for GPT-6.1 Sol in model selection - Add --mcp-github-auth to scope GitHub account auth to approved MCP server origins - Add
- v1.0.89 (September 28, 2026) — GitHub Copilot CLI v1.0.89 now lets you interact more naturally with inputs and commands, while adding support for Claude Code rule files and new mode
- v1.0.88 (September 22, 2026) — GitHub Copilot CLI v1.0.88 brings better terminal notifications for Ghostty and WezTerm users, plus improved text selection in dialogs for smoother in
- v1.0.87 (September 21, 2026) — GitHub Copilot CLI v1.0.87 makes it easier to edit and manage your prompts with new keyboard shortcuts that let you recall and modify pending messages
- v1.0.86 (September 17, 2026) — GitHub Copilot CLI v1.0.86 makes your custom instructions actually stick around when you reload your session, and gives you clearer visibility into wh
- v1.0.85 (September 16, 2026) — GitHub Copilot CLI v1.0.85 brings Vim mode to everyone and adds powerful new configuration tools like /settings and /config for deeper customization.
- v1.0.83 (September 4, 2026) — GitHub Copilot CLI v1.0.83 now shows your active sessions in the Windows taskbar with live status updates and adds support for custom agents that can