Mind Map Generator

Generate interactive mind maps as React (.jsx) artifacts.

When You Receive a Request

1. Analyze the input content — extract the central topic and 4–7 main branches
2. Build the mindmapData object following the Data Structure section below
3. Generate a React artifact that includes ALL of the Mandatory Code below
4. Optionally read references/mindmap-best-practices.md for keyword compression examples

Content Analysis Strategy

• Central topic: One noun phrase, 2–5 words max.
• Main branches: 4–7 categories. 5–6 is the sweet spot.
• Sub-branches: 2–5 items per branch. Keywords only, not full sentences.
• Depth limit: 3 levels max (central → branch → sub-branch).

For long content: identify the main argument → group into thematic clusters → extract key evidence → discard redundancy. For broad topics: educational overview, foundational concepts first.

Branch balance: Thin branches (1 item) → merge or expand. Fat branches (6+) → split.

Content Intelligence

Contradiction detection: Sources disagree → mark both with ⚡ prefix, add conflict field. Gap analysis: Thin evidence → add ❓ prefix, set type: "inquiry". Frequency weighting: Multi-source → weight field (1–5). Cross-branch links: Meaningful relationships → crossLinks array. Max 3–4.

Data Structure

const mindmapData = {
  central: "Topic Name",
  branches: [
    {
      label: "🎯 Branch Name",  // emoji + 2-5 words
      group: 0,                  // semantic grouping
      children: [
        { label: "Sub-item", detail: "Hover tooltip text" },
        { label: "❓ Gap node", type: "inquiry" },
      ],
    },
  ],
};

Fields: label (2-5 words), group (int, adjacent placement), detail (hover text), weight (1-5), type: "inquiry", conflict (node ID), sourceId, sources[], crossLinks[].

═══ MANDATORY CODE — Include ALL of This in Every Artifact ═══

The sections below contain exact code that MUST appear in every generated mind map. Copy these functions and UI elements verbatim. Do not paraphrase, simplify, or omit them.

Pill Sizing

function getPill(label, depth) {
  var fs = depth === 0 ? 17 : depth === 1 ? 14 : 12;
  var pad = depth === 0 ? 34 : depth === 1 ? 22 : 18;
  return {
    w: Math.max(label.length * fs * 0.62 + pad * 2, 90),
    h: depth === 0 ? 50 : depth === 1 ? 38 : 32,
  };
}

Edge-Anchored Connectors

Lines MUST start and end at the pill EDGE, not the center. Use these two functions:

function edgePoint(cx, cy, hw, hh, tx, ty) {
  var dx = tx - cx, dy = ty - cy;
  var dist = Math.sqrt(dx * dx + dy * dy);
  if (dist < 0.01) return { x: cx + hw, y: cy };
  var nx = dx / dist, ny = dy / dist;
  var t = 1.0 / Math.sqrt((nx * nx) / (hw * hw) + (ny * ny) / (hh * hh));
  return { x: cx + nx * t, y: cy + ny * t };
}

function buildCurve(ax, ay, aLabel, aDepth, bx, by, bLabel, bDepth) {
  var pa = getPill(aLabel, aDepth), pb = getPill(bLabel, bDepth);
  var s = edgePoint(ax, ay, pa.w / 2, pa.h / 2, bx, by);
  var e = edgePoint(bx, by, pb.w / 2, pb.h / 2, ax, ay);
  var qx = (s.x + e.x) / 2 + (s.y - e.y) * 0.18;
  var qy = (s.y + e.y) / 2 + (e.x - s.x) * 0.18;
  return "M " + s.x + " " + s.y + " Q " + qx + " " + qy + " " + e.x + " " + e.y;
}

When rendering edges, call buildCurve with the actual node positions and labels:

{edges.map(function(edge, i) {
  var fromN = nodesMap.get(edge.from);
  var toN = nodesMap.get(edge.to);
  if (!fromN || !toN) return null;
  var d = buildCurve(fromN.x, fromN.y, fromN.label, fromN.depth,
                     toN.x, toN.y, toN.label, toN.depth);
  return <path key={"e-" + i} d={d} fill="none" stroke={color}
    strokeWidth={edge.depth === 1 ? 2.5 : 1.6}
    strokeOpacity={edge.depth === 1 ? 0.45 : 0.25} strokeLinecap="round" />;
})}

NEVER write M ${a.x} ${a.y} Q ... ${b.x} ${b.y} — that draws center-to-center.

Node Rendering — Fully Opaque Pills

Pill <rect> elements MUST be 100% opaque so edges do not bleed through. CRITICAL: Do NOT use opacity, fillOpacity, rgba(), or 8-digit hex codes to lighten colors. If you need a lighter color, calculate a solid hex mixed with white. Force fillOpacity={1}.

Copy this pattern exactly:

{nodes.map(function(node) {
  var pill = getPill(node.label, node.depth);
  var w = pill.w, h = pill.h;
  // Use SOLID colors only. No rgba, no opacity.
  return (
    <g key={node.id} transform={"translate(" + node.x + "," + node.y + ")"}>
      {/* Pill — Forced 100% opacity */}
      <rect x={-w/2} y={-h/2} width={w} height={h}
        rx={node.depth === 0 ? 13 : 19} fill={bgColor} fillOpacity={1} />
      <text textAnchor="middle" dy="0.35em" fontSize={fontSize}
        fontWeight={fontWeight} fill={textColor}
        style={{ fontFamily: "system-ui, sans-serif", pointerEvents: "none" }}>
        {node.label}
      </text>
    </g>
  );
})}

💾 Save Button & Component Structure

Every mind map MUST include a Save button. To ensure this is not skipped, you MUST use this exact structural skeleton for your main component:

export default function MindMap() {
  var [saveMsg, setSaveMsg] = useState(null);
  var [palName, setPalName] = useState("Bauhaus");

  // 1. Paste handleSave function here exactly as written:
  async function handleSave() {
    var slug = mindmapData.central.toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/(^-|-$)/g, "");
    var key = "maps:" + slug;
    var existing = null;
    try { existing = await window.storage.get(key); } catch(e) {}
    var now = new Date().toISOString();
    var record = {
      data: mindmapData, palette: palName, layout: "radial",
      createdAt: existing ? JSON.parse(existing.value).createdAt : now,
      updatedAt: now, tags: [],
    };
    try {
      await window.storage.set(key, JSON.stringify(record));
      setSaveMsg(existing ? "Updated ✓" : "Saved ✓");
    } catch(e) { setSaveMsg("Error"); }
    setTimeout(function() { setSaveMsg(null); }, 2000);
  }

  return (
    <div style={{ position: "relative", width: "100%", height: "100vh" }}>
      {/* 2. Toolbar MUST contain the Save Button */}
      <div style={{ position: "absolute", top: 16, left: 16, display: "flex", gap: 8, zIndex: 10 }}>
        {/* Palette Picker goes here */}
        
        {/* MANDATORY SAVE BUTTON */}
        <button onClick={handleSave} style={{
          height: 32, padding: "0 16px", border: "1px solid #ddd", borderRadius: 7,
          background: saveMsg ? "#e8f5ee" : "#fff", cursor: "pointer",
          fontSize: 13, fontWeight: 700, fontFamily: "system-ui, sans-serif",
          color: saveMsg ? "#2D6A4F" : "#555",
        }}>
          {saveMsg || "💾 Save"}
        </button>
      </div>

      {/* 3. SVG Canvas goes here */}
    </div>
  );
}

Palette System

Include all four palettes and a runtime switcher:

var PALETTES = {
  Bauhaus: ["#D64045","#1D3557","#E9B44C","#2D6A4F","#7B2D8E","#E07A5F","#457B9D"],
  "Ocean Sunset": ["#E76F51","#2A9D8F","#E9C46A","#264653","#F4A261","#287271","#BC4749"],
  "Nordic Forest": ["#5B8C5A","#4A6FA5","#C17C74","#7B6D8D","#D4A574","#4D8B8B","#8B6F47"],
  "Pastel Garden": ["#7EB8DA","#B5C99A","#E8A87C","#9B8EC1","#F2CC8F","#81B29A","#E07A5F"],
};

Add a 🎨 button that shows a dropdown to switch palettes at runtime.

Layout Algorithm

Radial layout with semantic gravity. Branches sorted by group, distributed around a circle with gaps between groups:

function buildLayout(data) {
  var nodes = [], edges = [], cx = 600, cy = 450;
  nodes.push({ id: "root", label: data.central, x: cx, y: cy, depth: 0,
    childIds: [], collapsed: false, bi: -1, detail: null });
  var branches = data.branches || [];
  var sorted = branches.map(function(b, i) { return Object.assign({}, b, { oi: i }); });
  sorted.sort(function(a, b) { return (a.group || 0) - (b.group || 0); });
  var groups = [], lastG = null;
  sorted.forEach(function(b, i) { if (b.group !== lastG) { groups.push(i); lastG = b.group; } });
  var gapExtra = 0.14, totalGap = Math.max(0, groups.length - 1) * gapExtra;
  var baseStep = (2 * Math.PI - totalGap) / sorted.length;
  var angle = -Math.PI / 2;
  sorted.forEach(function(branch, i) {
    if (i > 0 && groups.indexOf(i) !== -1) angle += gapExtra;
    var bAngle = angle + (i * 0.05 - 0.08);
    var bx = cx + Math.cos(bAngle) * 260, by = cy + Math.sin(bAngle) * 260;
    var bId = "b-" + branch.oi;
    nodes.push({ id: bId, label: branch.label, x: bx, y: by, depth: 1,
      childIds: [], collapsed: false, bi: branch.oi, detail: branch.detail || null });
    nodes[0].childIds.push(bId);
    edges.push({ from: "root", to: bId, bi: branch.oi, depth: 1 });
    var kids = branch.children || [];
    kids.forEach(function(child, j) {
      var cc = kids.length, spread = Math.PI * (cc > 4 ? 0.65 : 0.5);
      var sa = bAngle - spread / 2;
      var ca = cc === 1 ? bAngle : sa + (j / (cc - 1)) * spread;
      var sx = bx + Math.cos(ca) * 150, sy = by + Math.sin(ca) * 150;
      var cId = "s-" + branch.oi + "-" + j;
      nodes.push({ id: cId, label: child.label, x: sx, y: sy, depth: 2,
        childIds: [], collapsed: false, bi: branch.oi, detail: child.detail || null });
      nodes.find(function(n) { return n.id === bId; }).childIds.push(cId);
      edges.push({ from: bId, to: cId, bi: branch.oi, depth: 2 });
    });
    angle += baseStep;
  });
  return { nodes: nodes, edges: edges };
}

Required Interaction Features

• Pan: mousedown drag on canvas background
• Zoom: mouse wheel, plus +/− buttons in toolbar
• Collapse/expand: click branch nodes to toggle children
• Hover tooltip: fixed position (top-left), shows detail text if present
• Fullscreen: ⛶ button, fills viewport, Escape to exit

═══ END MANDATORY CODE ═══

Conversational Editing

After first generation, users refine through conversation. Only change mindmapData. Do NOT re-read references. Do NOT regenerate engine code.

Edit response: State change (1 sentence) → regenerate → stop.

Edge Cases

• Very short input: Brainstorm-style map exploring facets.
• Very long input: Compress to 4–7 branches. Mention what was cut.
• Ambiguous: Generate first, ask second.
• Non-English: Same language as input.

What NOT To Do

• Do NOT generate connectors using center coordinates — use edgePoint() + buildCurve()
• Do NOT omit the 💾 Save button — use the component skeleton above with handleSave
• Do NOT use opacity, rgba(), or alpha channels to lighten pill colors — use solid hex only, force fillOpacity={1}
• Do NOT respond with a plain text summary — always produce a React artifact
• Do NOT use Mermaid.js or Excalidraw
• Do NOT skip the palette switcher

Output Pattern

First generation:

1. Brief explanation of extracted structure (1–2 sentences)
2. React artifact with mindmapData + all mandatory code above
3. Offer to adjust

Edits:

1. State the change (1 sentence)
2. Regenerate with updated data only
3. Stop.