devcontainer/containers/base/config/helix/languages.toml

# C#
[language-server.omnisharp]
command = "/home/user/.omnisharp/OmniSharp"
args = [ "--languageserver" ]

# Rust
[language-server.rust-analyzer.config.check]
command = "clippy"

[[language]]
name = "rust"
formatter = { command = "rustfmt" }