CC Fig MCP

Instructions

Implementation Reference

• src/talk_to_figma_mcp/tools/text-tools.ts:304-339 (handler)

  The complete MCP tool registration including Zod input schema, description, and async handler function that executes the set_line_height logic by sending a WebSocket command to the Figma plugin and formatting the response.

  server.tool(
    "set_line_height",
    "Set the line height of a text node in Figma",
    {
      nodeId: z.string().describe("The ID of the text node to modify"),
      lineHeight: z.number().describe("Line height value"),
      unit: z.enum(["PIXELS", "PERCENT", "AUTO"]).optional().describe("Unit type (PIXELS, PERCENT, or AUTO)"),
    },
    async ({ nodeId, lineHeight, unit }) => {
      try {
        const result = await sendCommandToFigma("set_line_height", {
          nodeId,
          lineHeight,
          unit: unit || "PIXELS"
        });
        const typedResult = result as { name: string, lineHeight: { value: number, unit: string } };
        return {
          content: [
            {
              type: "text",
              text: `Updated line height of node "${typedResult.name}" to ${typedResult.lineHeight.value} ${typedResult.lineHeight.unit}`
            }
          ]
        };
      } catch (error) {
        return {
          content: [
            {
              type: "text",
              text: `Error setting line height: ${error instanceof Error ? error.message : String(error)}`
            }
          ]
        };
      }
    }
  );

• src/talk_to_figma_mcp/types/index.ts:75-76 (schema)

  Type definition for FigmaCommand union including 'set_line_height' used for type safety in command sending.

  | "set_line_height"
  | "set_paragraph_spacing"

• src/talk_to_figma_mcp/tools/index.ts:16-16 (registration)

  Calls registerTextTools which includes the set_line_height tool registration.

  registerTextTools(server);