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c919a2d0ec
"Generate a diagram to illustrate the git operation" still produced hand-written XML. Root cause: the very first working instruction in the system prompt said "then use display_diagram tool to generate the XML" — unconditionally. The tool-routing rules that divide by layout shape only appear 70 lines later, so the earlier, more actionable instruction won. That line predates draw_graph and restructure_diagram, from when display_diagram was the only drawing tool. - The opening instruction now says to pick the tool by layout shape, and names the engine tools as the default with display_diagram as the exception. - The identity line no longer describes the job as "precise XML specifications". - draw_graph's examples (prompt and tool description) now include git/branching workflows and the "illustrate how X works" phrasing. - "Core capabilities" and "Layout constraints" are scoped to display_diagram — they read as instructions to hand-position everything. - The edit_diagram error-recovery note no longer funnels back to display_diagram for restructuring. - display_diagram's own tool description now states it is the exception and points to draw_graph / restructure_diagram.