Support matrix verified on 2026-08-20 against GitHub's per-IDE documentation. The full comparison, including instruction-file support and key bindings, is on the IDE support dataset.
Two surfaces are deliberately absent. GitHub.com and Copilot CLI are not editors and are not in this matrix; the CLI cluster covers the command line on its own terms. Neovim supports code completion only. There is no chat, no agent mode and no MCP, and GitHub ships no default key mappings — you bind them yourself.