diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
new file mode 100644
index 00000000..698d23ae
--- /dev/null
+++ b/.github/copilot-instructions.md
@@ -0,0 +1,89 @@
+# Fantasy Map Generator
+
+Azgaar's Fantasy Map Generator is a client-side JavaScript web application for creating fantasy maps. It generates detailed fantasy worlds with countries, cities, rivers, biomes, and cultural elements.
+
+Always reference these instructions first and fallback to search or bash commands only when you encounter unexpected information that does not match the info here.
+
+## Working Effectively
+
+- **CRITICAL**: This is a static web application - NO build process needed. No npm install, no compilation, no bundling.
+- Run the application using HTTP server (required - cannot run with file:// protocol):
+  - `python3 -m http.server 8000` - takes 2-3 seconds to start
+- Access at: `http://localhost:8000`
+
+## Validation
+
+- Always manually validate any changes by:
+  1. Starting the HTTP server (NEVER CANCEL - wait for full startup)
+  2. Navigate to the application in browser
+  3. Click the "►" button to open the menu and generate a new map
+  4. **CRITICAL VALIDATION**: Verify the map generates with countries, cities, roads, and geographic features
+  5. Test UI interaction: click "Layers" button, verify layer controls work
+  6. Test regeneration: click "New Map!" button, verify new map generates correctly
+- **Known Issues**: Google Analytics and font loading errors are normal (blocked external resources)
+
+## Repository Structure
+
+### Core Files
+
+- `index.html` - Main application entry point
+- `main.js` - Core application logic
+- `versioning.js` - Version management and update handling
+
+### Key Directories
+
+- `modules/` - core functionality modules:
+  - `modules/ui/` - UI components (editors, tools, style management)
+  - `modules/dynamic/` - runtime modules (export, installation)
+  - `modules/renderers/` - drawing and rendering logic
+- `utils/` - utility libraries (math, arrays, strings, etc.)
+- `styles/` - visual style presets (JSON files)
+- `libs/` - Third-party libraries (D3.js, TinyMCE, etc.)
+- `images/` - backgrounds, UI elements
+- `charges/` - heraldic symbols and coat of arms elements
+- `config/` - Heightmap templates and configurations
+- `heightmaps/` - Terrain generation data
+
+## Common Tasks
+
+### Making Code Changes
+
+1. Edit JavaScript files directly (no compilation needed)
+2. Refresh browser to see changes immediately
+3. **ALWAYS test map generation** after making changes
+4. Update version in `versioning.js` for all changes
+5. Update file hashes in `index.html` for changed files (format: `file.js?v=1.108.1`)
+
+### Debugging Map Generation
+
+- Open browser developer tools console
+- Look for timing logs, e.g. "TOTAL: ~0.76s"
+- Map generation logs show each step (heightmap, rivers, states, etc.)
+- Error messages will indicate specific generation failures
+
+### Testing Different Map Types
+
+- Use "New Map!" button for quick regeneration
+- Access "Layers" menu to change map visualization
+- Available presets: Political, Cultural, Religions, Biomes, Heightmap, Physical, Military
+
+## Troubleshooting
+
+### Application Won't Load
+
+- Ensure using HTTP server (not file://)
+- Check console for JavaScript errors
+- Verify all files are present in repository
+
+### Map Generation Fails
+
+- Check browser console for error messages
+- Look for specific module failures in generation logs
+- Try refreshing page and generating new map
+
+### Performance Issues
+
+- Map generation should complete in ~1 second for standard configurations
+- If slower, check browser console for errors
+
+Remember: This is a sophisticated client-side application that generates complete fantasy worlds with political systems, geography, cultures, and detailed cartographic elements. Always validate that your changes preserve the core map generation functionality.
diff --git a/index.html b/index.html
index 24ac3e80..80241d98 100644
--- a/index.html
+++ b/index.html
@@ -5009,11 +5009,16 @@
             </label>
             <label for="aiGeneratorKey"
               >Key:
-              <input id="aiGeneratorKey" placeholder="Enter API key" class="icon-key" />
+              <input
+                id="aiGeneratorKey"
+                placeholder="Enter API key"
+                class="icon-key"
+                data-tip="Enter API key. Note: the Generator doesn't store the key or any generated data"
+              />
               <button
                 id="aiGeneratorKeyHelp"
                 class="icon-help-circled"
-                data-tip="Open provider's website to get the API key there. Note: the Map Genenerator doesn't store the key or any generated data"
+                data-tip="Click to see the usage instructions"
               />
             </label>
           </div>
@@ -8329,7 +8334,7 @@
     <script src="utils/polyfills.js?v=1.99.00"></script>
     <script src="utils/probabilityUtils.js?v=1.99.05"></script>
     <script src="utils/stringUtils.js?v=1.106.0"></script>
-    <script src="utils/languageUtils.js?v=1.99.00"></script>
+    <script src="utils/languageUtils.js?v=1.108.11"></script>
     <script src="utils/unitUtils.js?v=1.99.00"></script>
     <script src="utils/pathUtils.js?v=1.106.0"></script>
     <script defer src="utils/debugUtils.js?v=1.106.0"></script>
@@ -8389,9 +8394,9 @@
     <script defer src="modules/ui/relief-editor.js?v=1.99.00"></script>
     <script defer src="modules/ui/burg-group-editor.js?v=1.106.0"></script>
     <script defer src="modules/ui/burg-editor.js?v=1.106.6"></script>
-    <script defer src="modules/ui/units-editor.js?v=1.104.0"></script>
+    <script defer src="modules/ui/units-editor.js?v=1.108.12"></script>
     <script defer src="modules/ui/notes-editor.js?v=1.107.3"></script>
-    <script defer src="modules/ui/ai-generator.js?v=1.105.22"></script>
+    <script defer src="modules/ui/ai-generator.js?v=1.108.8"></script>
     <script defer src="modules/ui/diplomacy-editor.js?v=1.99.00"></script>
     <script defer src="modules/ui/zones-editor.js?v=1.105.20"></script>
     <script defer src="modules/ui/burgs-overview.js?v=1.105.15"></script>
@@ -8399,7 +8404,7 @@
     <script defer src="modules/ui/rivers-overview.js?v=1.99.00"></script>
     <script defer src="modules/ui/military-overview.js?v=1.108.5"></script>
     <script defer src="modules/ui/regiments-overview.js?v=1.108.5"></script>
-    <script defer src="modules/ui/markers-overview.js?v=1.108.5"></script>
+    <script defer src="modules/ui/markers-overview.js?v=1.108.10"></script>
     <script defer src="modules/ui/regiment-editor.js?v=1.108.5"></script>
     <script defer src="modules/ui/battle-screen.js?v=1.108.5"></script>
     <script defer src="modules/ui/emblems-editor.js?v=1.99.00"></script>
@@ -8414,7 +8419,7 @@
     <script defer src="modules/io/save.js?v=1.107.4"></script>
     <script defer src="modules/io/load.js?v=1.108.0"></script>
     <script defer src="modules/io/cloud.js?v=1.106.0"></script>
-    <script defer src="modules/io/export.js?v=1.100.00"></script>
+    <script defer src="modules/io/export.js?v=1.108.11"></script>
 
     <script defer src="modules/renderers/draw-features.js?v=1.108.2"></script>
     <script defer src="modules/renderers/draw-borders.js?v=1.104.0"></script>
diff --git a/modules/io/export.js b/modules/io/export.js
index 075ac801..fcc94cb6 100644
--- a/modules/io/export.js
+++ b/modules/io/export.js
@@ -330,6 +330,40 @@ async function getMapURL(
     if (pattern) cloneDefs.appendChild(pattern.cloneNode(true));
   }
 
+  {
+    // replace external marker icons
+    const externalMarkerImages = cloneEl.querySelectorAll('#markers image[href]:not([href=""])');
+    const imageHrefs = Array.from(externalMarkerImages).map(img => img.getAttribute("href"));
+
+    for (const url of imageHrefs) {
+      await new Promise(resolve => {
+        getBase64(url, base64 => {
+          externalMarkerImages.forEach(img => {
+            if (img.getAttribute("href") === url) img.setAttribute("href", base64);
+          });
+          resolve();
+        });
+      });
+    }
+  }
+
+  {
+    // replace external regiment icons
+    const externalRegimentImages = cloneEl.querySelectorAll('#armies image[href]:not([href=""])');
+    const imageHrefs = Array.from(externalRegimentImages).map(img => img.getAttribute("href"));
+
+    for (const url of imageHrefs) {
+      await new Promise(resolve => {
+        getBase64(url, base64 => {
+          externalRegimentImages.forEach(img => {
+            if (img.getAttribute("href") === url) img.setAttribute("href", base64);
+          });
+          resolve();
+        });
+      });
+    }
+  }
+
   if (!cloneEl.getElementById("fogging-cont")) cloneEl.getElementById("fog")?.remove(); // remove unused fog
   if (!cloneEl.getElementById("regions")) cloneEl.getElementById("statePaths")?.remove(); // removed unused statePaths
   if (!cloneEl.getElementById("labels")) cloneEl.getElementById("textPaths")?.remove(); // removed unused textPaths
@@ -495,11 +529,10 @@ function saveGeoJsonCells() {
 function saveGeoJsonRoutes() {
   const features = pack.routes.map(({i, points, group, name = null}) => {
     const coordinates = points.map(([x, y]) => getCoordinates(x, y, 4));
-    const id = `route${i}`;
     return {
       type: "Feature",
       geometry: {type: "LineString", coordinates},
-      properties: {id, group, name}
+      properties: {id: i, group, name}
     };
   });
   const json = {type: "FeatureCollection", features};
@@ -514,11 +547,10 @@ function saveGeoJsonRivers() {
       if (!cells || cells.length < 2) return;
       const meanderedPoints = Rivers.addMeandering(cells, points);
       const coordinates = meanderedPoints.map(([x, y]) => getCoordinates(x, y, 4));
-      const id = `river${i}`;
       return {
         type: "Feature",
         geometry: {type: "LineString", coordinates},
-        properties: {id, source, mouth, parent, basin, widthFactor, sourceWidth, discharge, name, type}
+        properties: {id: i, source, mouth, parent, basin, widthFactor, sourceWidth, discharge, name, type}
       };
     }
   );
@@ -532,9 +564,8 @@ function saveGeoJsonMarkers() {
   const features = pack.markers.map(marker => {
     const {i, type, icon, x, y, size, fill, stroke} = marker;
     const coordinates = getCoordinates(x, y, 4);
-    const id = `marker${i}`;
     const note = notes.find(note => note.id === id);
-    const properties = {id, type, icon, x, y, ...note, size, fill, stroke};
+    const properties = {id: i, type, icon, x, y, ...note, size, fill, stroke};
     return {type: "Feature", geometry: {type: "Point", coordinates}, properties};
   });
 
diff --git a/modules/ui/ai-generator.js b/modules/ui/ai-generator.js
index 734f1246..8ef13cf6 100644
--- a/modules/ui/ai-generator.js
+++ b/modules/ui/ai-generator.js
@@ -8,6 +8,10 @@ const PROVIDERS = {
   anthropic: {
     keyLink: "https://console.anthropic.com/account/keys",
     generate: generateWithAnthropic
+  },
+  ollama: {
+    keyLink: "https://github.com/Azgaar/Fantasy-Map-Generator/wiki/Ollama-text-generation",
+    generate: generateWithOllama
   }
 };
 
@@ -18,11 +22,16 @@ const MODELS = {
   "chatgpt-4o-latest": "openai",
   "gpt-4o": "openai",
   "gpt-4-turbo": "openai",
-  "o1-preview": "openai",
-  "o1-mini": "openai",
+  o3: "openai",
+  "o3-mini": "openai",
+  "o3-pro": "openai",
+  "o4-mini": "openai",
+  "claude-opus-4-20250514": "anthropic",
+  "claude-sonnet-4-20250514": "anthropic",
   "claude-3-5-haiku-latest": "anthropic",
   "claude-3-5-sonnet-latest": "anthropic",
-  "claude-3-opus-latest": "anthropic"
+  "claude-3-opus-latest": "anthropic",
+  "ollama (local models)": "ollama"
 };
 
 const SYSTEM_MESSAGE = "I'm working on my fantasy map.";
@@ -76,10 +85,36 @@ async function generateWithAnthropic({key, model, prompt, temperature, onContent
   await handleStream(response, getContent);
 }
 
+async function generateWithOllama({key, model, prompt, temperature, onContent}) {
+  const ollamaModelName = key; // for Ollama, 'key' is the actual model name entered by the user
+
+  const response = await fetch("http://localhost:11434/api/generate", {
+    method: "POST",
+    headers: {"Content-Type": "application/json"},
+    body: JSON.stringify({
+      model: ollamaModelName,
+      prompt,
+      system: SYSTEM_MESSAGE,
+      options: {temperature},
+      stream: true
+    })
+  });
+
+  const getContent = json => {
+    if (json.response) onContent(json.response);
+  };
+
+  await handleStream(response, getContent);
+}
+
 async function handleStream(response, getContent) {
   if (!response.ok) {
-    const json = await response.json();
-    throw new Error(json?.error?.message || "Failed to generate");
+    let errorMessage = `Failed to generate (${response.status} ${response.statusText})`;
+    try {
+      const json = await response.json();
+      errorMessage = json.error?.message || json.error || errorMessage;
+    } catch {}
+    throw new Error(errorMessage);
   }
 
   const reader = response.body.getReader();
@@ -95,13 +130,14 @@ async function handleStream(response, getContent) {
 
     for (let i = 0; i < lines.length - 1; i++) {
       const line = lines[i].trim();
-      if (line.startsWith("data: ") && line !== "data: [DONE]") {
-        try {
-          const json = JSON.parse(line.slice(6));
-          getContent(json);
-        } catch (jsonError) {
-          ERROR && console.error(`Failed to parse JSON:`, jsonError, `Line: ${line}`);
-        }
+      if (!line) continue;
+      if (line === "data: [DONE]") break;
+
+      try {
+        const parsed = line.startsWith("data: ") ? JSON.parse(line.slice(6)) : JSON.parse(line);
+        getContent(parsed);
+      } catch (error) {
+        ERROR && console.error("Failed to parse line:", line, error);
       }
     }
 
diff --git a/modules/ui/markers-overview.js b/modules/ui/markers-overview.js
index bcb2efb0..02999eb0 100644
--- a/modules/ui/markers-overview.js
+++ b/modules/ui/markers-overview.js
@@ -214,15 +214,15 @@ function overviewMarkers() {
 
     const body = pack.markers.map(marker => {
       const {i, type, icon, x, y} = marker;
-      const id = `marker${i}`;
-      const note = notes.find(note => note.id === id);
+
+      const note = notes.find(note => note.id === "marker" + i);
       const name = note ? quote(note.name) : "Unknown";
       const legend = note ? quote(note.legend) : "";
 
       const lat = getLatitude(y, 2);
       const lon = getLongitude(x, 2);
 
-      return [id, type, icon, name, legend, x, y, lat, lon].join(",");
+      return [i, type, icon, name, legend, x, y, lat, lon].join(",");
     });
 
     const data = headers + body.join("\n");
diff --git a/modules/ui/units-editor.js b/modules/ui/units-editor.js
index a30e9a7d..aa63e64a 100644
--- a/modules/ui/units-editor.js
+++ b/modules/ui/units-editor.js
@@ -121,11 +121,16 @@ function editUnits() {
 
   function addRuler() {
     if (!layerIsOn("toggleRulers")) toggleRulers();
+
+    const width = Math.min(graphWidth, svgWidth);
+    const height = Math.min(graphHeight, svgHeight);
     const pt = byId("map").createSVGPoint();
-    (pt.x = graphWidth / 2), (pt.y = graphHeight / 4);
+    pt.x = width / 2;
+    pt.y = height / 4;
     const p = pt.matrixTransform(viewbox.node().getScreenCTM().inverse());
-    const dx = graphWidth / 4 / scale;
-    const dy = (rulers.data.length * 40) % (graphHeight / 2);
+
+    const dx = width / 4 / scale;
+    const dy = (rulers.data.length * 40) % (height / 2);
     const from = [(p.x - dx) | 0, (p.y + dy) | 0];
     const to = [(p.x + dx) | 0, (p.y + dy) | 0];
     rulers.create(Ruler, [from, to]).draw();
diff --git a/run_python_server.sh b/run_python_server.sh
new file mode 100644
index 00000000..7ac82957
--- /dev/null
+++ b/run_python_server.sh
@@ -0,0 +1,13 @@
+#!/usr/bin/env sh
+if command -v python3 >/dev/null 2>&1; then
+	PYTHON=python3
+elif command -v python >/dev/null 2>&1; then
+	PYTHON=python
+else 
+	echo "Neither 'python' nor 'python3' was found. Please install Python 3 package." >&2
+	exit 1
+fi
+
+chromium http://localhost:8000
+
+$PYTHON -m http.server 8000
diff --git a/utils/languageUtils.js b/utils/languageUtils.js
index 87f5d67d..9caa1b6f 100644
--- a/utils/languageUtils.js
+++ b/utils/languageUtils.js
@@ -135,7 +135,7 @@ const adjectivizationRules = [
   {
     name: "an",
     probability: 0.5,
-    condition: new RegExp("^[a-zA-Z]{0-7}$"),
+    condition: new RegExp("^[a-zA-Z]{0,7}$"),
     action: noun => trimVowels(noun) + "an"
   }
 ];