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Noir VSCode Extension

Install the Noir Language Support extension to get syntax highlighting, syntax error detection, and go-to definitions for your Aztec contracts.

The extension drives its language server with nargo. The Aztec installer installs its own version of nargo and adds that directory to your PATH, so in most cases you do not need to configure anything else. Verify the binary is on your PATH:

which nargo
# expected: $HOME/.aztec/<path to nargo binary>

If you have not installed the Aztec toolchain yet, follow Getting Started on Local Network first.

Configure the extension​

Leave the extension's Noir: Nargo Path setting empty so it auto-discovers nargo from your PATH. To confirm, hover over Nargo in the VSCode status bar in the bottom right corner — it should show the path under the result from which nargo.

If auto-discovery fails, set Noir: Nargo Path to the absolute path printed by which nargo, then reload the window.

Troubleshooting​

  • LSP reports startFailed after setting a custom path: clear Noir: Nargo Path, reload the window, and let auto-discovery take over.
  • which nargo points outside $HOME/.aztec/current/bin: another nargo earlier on your PATH is shadowing the Aztec-provided one. Either remove it or set Noir: Nargo Path explicitly to the Aztec-provided nargo.