OpenPencil OpenPencil provides a CLI and MCP server for design files and the running OpenPencil editor. Use two modes: - App mode — connect to the running OpenPencil editor by omitting the file argument. - Headless mode — work with files directly by passing a file path. Use , per-command help, and the connected MCP server’s tool schemas to check the installed version’s capabilities. See the CLI reference and MCP guide for current documentation. Variable formulas Inside , use for numeric formulas or for Boolean formulas, which use , , and number comparisons. Collections and variables must alre…