What it does

copilot-cmp is a thin adapter that turns copilot.lua into a source for nvim-cmp. Instead of Copilot’s ghost-text suggestions hovering off to the side, its completions appear as snippets inside your standard cmp dropdown, complete with a custom icon and highlight group.

The interesting bit

The plugin’s real work is smoothing out the rough edges of forcing two opinionated systems together. It ships a fix_pairs option that stops Copilot from generating completions that would clobber your existing brackets, and a prioritize comparator so Copilot entries don’t get buried under LSP noise—or drown out exact matches.

Key highlights

• Requires disabling copilot.lua’s native suggestion and panel modules to avoid interference
• Provides CmpItemKindCopilot highlight group and lspkind integration for a green GitHub icon
• Includes a recommended <Tab> mapping that falls back to indentation on empty lines, since Copilot uniquely suggests completions from surrounding context even on blank lines
• fix_pairs option handles bracket/quote collision edge cases automatically
• Heavily discourages tweaking defaults; the author seems tired of configuration support tickets

Caveats

• Pure glue code: does nothing without both copilot.lua and nvim-cmp already installed and configured
• The README’s “highly recommended” tab configuration is essentially mandatory if you use Tab for completion selection, otherwise you’ll indent-fight with Copilot’s blank-line suggestions

Verdict

Worth it if you’re already running nvim-cmp and want Copilot in the same menu as your LSP and snippet sources. Skip if you’re happy with Copilot’s native ghost text or use a different completion framework.