SYX file extension (.sy)

SYX source files use the .sy extension and are UTF-8 encoded. A multi-file project is declared with a syx.toml manifest at the project root.

Minimal layout

my-app/
  syx.toml
  src/
    main.sy

Example syx.toml fields (see the Quick Guide for the full schema):

name = "my-app"
version = "0.1.0"
main = "src/main.sy"

Modules are pulled in with import. The toolchain binary is syx (syx-cli).

Association checklist

Item	Value
Source extension	.sy
Manifest	syx.toml
Run	syx run file.sy
Language server	syx lsp

Related

• Install SYX
• What is SYX?
• Quick Guide — CLI, projects, Native / Wasm