The schematic writer scans for (wire at every character, including inside quoted strings, so if a symbol value or text item contains a wire expression, the next write empties that string and appends the embedded segment as a real wire, which can join nets. The tool reports success. The structural-loss guard compares node counts, and the wire count goes up, not down, so it passes. A single sch_add_component call is enough to trigger it.

Recurring agent failure issue in kicad-mcp-pro (oaslananka)