Coi Language for VS Code

February 21, 2026 · View on GitHub

Language support for Coi: syntax highlighting, completions, hovers, signature help, and formatting.

What you get

Full syntax highlighting for .coi (including view, style, init, mount, tick)
Automatic .d.coi definition discovery via coi --defs-path (or set coi.definitionsPath manually)
Completions for platform APIs, keywords, core types, and common methods
Hover + signature help for function calls and framework APIs
Built-in document formatter for consistent spacing and indentation

Setting	Default	Description
`coi.definitionsPath`	`""`	Path to `.d.coi` definitions. Empty = auto-detect via `coi --defs-path`.
`coi.format.enable`	`true`	Enable COI document formatting.