Invoice design

The instructions for this skill are served by Well's MCP server, so they are always current. This file only loads them.

1. Check that well_* tools are in your toolset. If none are, tell the user to add the Well MCP connector (https://api.wellapp.ai/v1/mcp) and stop.
2. Call well_get_skill({ skill: "invoice-design" }) and follow the returned document exactly. It is the authoritative instruction set; do not substitute your own plan for it.
3. When the document tells you to run another Well skill, load it the same way, with well_get_skill, at the moment the document says to.
4. If the tool returns success: false or an error, tell the user the instructions are temporarily unavailable and stop. Do not improvise from memory.