diff --git a/prompts/language/whiteboard_diagrams_1223.md b/prompts/language/whiteboard_diagrams_1223.md
new file mode 100644
index 0000000..9b86d1c
--- /dev/null
+++ b/prompts/language/whiteboard_diagrams_1223.md
@@ -0,0 +1,174 @@
+---
+title: "Whiteboard Diagrams"
+contributor: "@semih@mitte.ai"
+tags: #language, #semihmitteai
+---
+
+Steps to build an AI startup by making something people want:
+
+{
+  "style": {
+    "name": "Whiteboard Sketch Diagram",
+    "description": "Transform any concept into an elegant hand-drawn diagram. Clean, minimal, architectural in feel—like a smart person's quick sketch on a whiteboard."
+  },
+  "core_philosophy": {
+    "essence": "Elegant simplicity—the lightest possible touch that still communicates clearly",
+    "mindset": "An architect or designer explaining an idea with a fine pen",
+    "goal": "Clarity through restraint and refinement"
+  },
+  "visual_foundation": {
+    "canvas_structure": {
+      "outer_background": "#FFFFFF",
+      "card": {
+        "size": "95-98% of canvas—minimal white margin",
+        "color": "#FEFEFE",
+        "corner_radius": "12-16px subtle roundness",
+        "shadow": "NONE",
+        "border": "NONE"
+      }
+    },
+    "overall_aesthetic": {
+      "feel": "Light, airy, intellectual, refined",
+      "weight": "Delicate—everything feels thin and elegant",
+      "space": "Generous white space everywhere"
+    }
+  },
+  "line_work": {
+    "critical_principle": "THIN AND DELICATE—not bold, not heavy, not chunky",
+    "quality": {
+      "weight": "Fine, thin lines—like a 0.5mm pen or fine-tip marker",
+      "character": "Architectural, precise but hand-drawn",
+      "consistency": "Uniform thin weight throughout"
+    },
+    "stroke_style": {
+      "lines": "Thin, clean, slightly imperfect",
+      "corners": "Sharp or slightly rounded, never bulky",
+      "feel": "Drawn quickly but skillfully"
+    }
+  },
+  "color_palette": {
+    "exact_colors": {
+      "card_background": {
+        "hex": "#FEFEFE",
+        "description": "Almost white, flat, neutral"
+      },
+      "primary_text": {
+        "hex": "#020202",
+        "description": "Near-black for text—crisp and readable"
+      },
+      "line_gray": {
+        "hex": "#4A4B4B",
+        "description": "Dark gray for all drawn lines, boxes, shapes—NOT pure black"
+      },
+      "accent_blue": {
+        "hex": "#2C68B7",
+        "description": "Clear medium blue—for arrows, connectors, brackets, some labels"
+      },
+      "accent_red": {
+        "hex": "#B34952",
+        "description": "Warm coral-red—for category labels, emphasis text"
+      },
+      "fill_blue": {
+        "hex": "#2C68B7",
+        "description": "Same blue for small filled squares/shapes"
+      },
+      "fill_gray": {
+        "hex": "#4A4B4B",
+        "description": "Dark gray for filled grid cells"
+      }
+    },
+    "usage": {
+      "text": "Primary text in #020202 black, categories in #E54B54 red",
+      "lines_and_shapes": "All outlines in #4A4B4B gray—NOT black",
+      "arrows_and_flow": "#2C68B7 blue—thin and elegant",
+      "fills": "Small filled squares in blue or gray—never large solid areas"
+    }
+  },
+  "typography": {
+    "style": {
+      "type": "Elegant italic handwriting",
+      "weight": "Light to medium—never bold or heavy",
+      "slant": "Natural italic lean",
+      "character": "Fluid, intelligent, like architect's lettering"
+    },
+    "colors": {
+      "titles": "#020202 black, italic",
+      "category_labels": "#E54B54 red",
+      "annotations": "#2C68B7 blue or #020202 black"
+    }
+  },
+  "diagram_elements": {
+    "boxes_and_rectangles": {
+      "stroke": "THIN #4A4B4B gray outline—1-2px weight max",
+      "fill": "Empty/transparent—never solid filled large boxes",
+      "corners": "Slightly rounded or sharp, hand-drawn",
+      "style": "Light, airy, not heavy containers"
+    },
+    "grids_and_matrices": {
+      "stroke": "Thin gray lines",
+      "cells": "Small—may contain small filled squares or numbers",
+      "fills": "Small squares filled blue or gray to show data"
+    },
+    "arrows": {
+      "critical": "THIN, ELEGANT, SIMPLE—not chunky PowerPoint arrows",
+      "stroke": "Thin #2C68B7 blue line—same weight as other lines",
+      "heads": "Small, simple, minimal—just two short angled lines forming a point",
+      "style": "Like hand-drawn with a fine pen, not a thick marker",
+      "types": [
+        "Simple thin straight arrows",
+        "Thin curved arrows for flow",
+        "Never: block arrows, 3D arrows, gradient arrows, thick arrows"
+      ]
+    },
+    "brackets": {
+      "style": "Thin hand-drawn curly braces in blue",
+      "weight": "Same thin line weight as everything else"
+    },
+    "dots_and_markers": {
+      "style": "Small filled circles or squares",
+      "size": "Tiny—proportional to the thin line aesthetic",
+      "colors": "Blue or red for emphasis"
+    }
+  },
+  "visual_language": {
+    "shapes_vocabulary": {
+      "rectangles": "Thin outlined boxes—vertical or horizontal orientation",
+      "grids": "Small matrices with tiny filled cells",
+      "lists": "Simple dashed or bulleted items inside boxes",
+      "flow": "Thin arrows connecting elements left-to-right"
+    },
+    "composition_patterns": {
+      "typical_layout": "2-4 main elements arranged horizontally with arrows between",
+      "spacing": "Generous gaps between elements",
+      "alignment": "Rough but intentional alignment",
+      "hierarchy": "Titles above boxes, labels below or beside"
+    },
+    "proportions": {
+      "line_weight_to_space": "Very thin lines in very open space",
+      "text_to_diagram": "Text is secondary, diagram dominates",
+      "fill_to_empty": "Mostly empty, fills are small accents"
+    }
+  },
+  "elegance_principles": {
+    "lightness": "Everything should feel like it could float away",
+    "restraint": "Use the minimum to communicate the idea",
+    "refinement": "Quality of line over quantity of elements",
+    "intelligence": "Looks like a smart person drew it quickly",
+    "breathing": "White space is as important as the marks"
+  },
+  "avoid": [
+    "Thick, heavy, bold lines",
+    "Chunky PowerPoint-style arrows",
+    "Block arrows or 3D arrows",
+    "Large solid filled areas",
+    "Dense, cluttered layouts",
+    "Bold or heavy typography",
+    "Drop shadows or gradients",
+    "Corporate clip-art aesthetic",
+    "Rounded bubble shapes",
+    "Any line weight that feels 'heavy'",
+    "Pure black (#000000) for lines—use #4A4B4B gray",
+    "Decorative elements",
+    "Overly complex diagrams"
+  ]
+}