diff --git a/wwwroot/css/chat.css b/wwwroot/css/chat.css
index 3550303..6d11469 100644
--- a/wwwroot/css/chat.css
+++ b/wwwroot/css/chat.css
@@ -98,6 +98,40 @@
   margin-inline: auto;
 }
 
+/* Workspace Refs */
+
+.ref-preview {
+  padding: var(--s2) var(--s4);
+  background: var(--f1-bg);
+  border-top: var(--border-width) solid var(--f1-border);
+  flex-wrap: wrap;
+  gap: var(--s2);
+}
+
+.ref-preview:not([hidden]) {
+  display: flex;
+}
+
+.ref-preview-item {
+  display: flex;
+  align-items: center;
+  gap: var(--s2);
+  padding: var(--s1) var(--s2);
+  background: var(--f2-bg);
+  border: var(--border-width) solid var(--f2-border);
+}
+
+.ref-icon {
+  flex-shrink: 0;
+}
+
+.ref-label {
+  font-size: 0.9em;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 /* File Upload */
 
 .file-btn {
diff --git a/wwwroot/index.html b/wwwroot/index.html
index 0c9ad85..d9302b9 100644
--- a/wwwroot/index.html
+++ b/wwwroot/index.html
@@ -123,6 +123,7 @@
     </header>
     <div class="meta-bar" id="meta"></div>
     <div id="chat"></div>
+    <div id="refPreview" class="ref-preview" hidden></div>
     <div id="filePreview" class="file-preview" hidden></div>
     <div class="input-area">
       <input type="file" id="fileInput" accept="image/jpeg,image/png,image/gif,image/webp,application/pdf" multiple hidden>
diff --git a/wwwroot/js/chat.js b/wwwroot/js/chat.js
index ba9bb17..92f3046 100644
--- a/wwwroot/js/chat.js
+++ b/wwwroot/js/chat.js
@@ -3,6 +3,7 @@
 const messages = [];
 let isStreaming = false;
 let pendingFiles = []; // [{ name, type, base64 }]
+let pendingRefs = [];  // [{ path, from, to }] - Workspace-Dateireferenzen
 
 async function clearChat() {
   const archive = await apiArchive(getCurrentSessionId());
@@ -23,12 +24,23 @@ async function sendMessage() {
   const input = $('#input');
   const btn = $('#send');
   const text = input.value.trim();
-  if (!text && pendingFiles.length === 0) return;
+  if (!text && pendingFiles.length === 0 && pendingRefs.length === 0) return;
 
   // Content bauen: string oder array mit file-blocks
   let content;
   let bubbleText = text;
 
+  // Refs in den Text einbauen
+  let msgText = text;
+  if (pendingRefs.length > 0) {
+    const refTags = pendingRefs.map(r => {
+      if (r.from && r.to) return `[Datei: ${r.path}:${r.from}-${r.to}]`;
+      return `[Datei: ${r.path}]`;
+    });
+    msgText = refTags.join('\n') + (text ? '\n' + text : '');
+    clearPendingRefs();
+  }
+
   if (pendingFiles.length > 0) {
     content = [];
     const labels = [];
@@ -41,11 +53,12 @@ async function sendMessage() {
       });
       labels.push((blockType === 'image' ? '📷 ' : '📄 ') + f.name);
     }
-    if (text) content.push({ type: 'text', text });
-    bubbleText = labels.join('\n') + (text ? '\n' + text : '');
+    if (msgText) content.push({ type: 'text', text: msgText });
+    bubbleText = labels.join('\n') + (msgText ? '\n' + msgText : '');
     clearPendingFiles();
   } else {
-    content = text;
+    content = msgText;
+    bubbleText = msgText;
   }
 
   messages.push({ role: 'user', content });
@@ -197,6 +210,50 @@ function removePendingFile(index) {
   renderFilePreview();
 }
 
+// ── Workspace Refs ──
+
+function addPendingRef(ref) {
+  // ref = "path" oder "path:from-to"
+  const match = ref.match(/^(.+?):(\d+)-(\d+)$/);
+  if (match) {
+    pendingRefs.push({ path: match[1], from: parseInt(match[2]), to: parseInt(match[3]) });
+  } else {
+    pendingRefs.push({ path: ref, from: null, to: null });
+  }
+  renderRefPreview();
+}
+
+function removePendingRef(index) {
+  pendingRefs.splice(index, 1);
+  renderRefPreview();
+}
+
+function clearPendingRefs() {
+  pendingRefs.length = 0;
+  renderRefPreview();
+}
+
+function renderRefPreview() {
+  const container = $('#refPreview');
+  if (!container) return;
+
+  if (pendingRefs.length === 0) {
+    container.innerHTML = '';
+    container.hidden = true;
+    return;
+  }
+
+  container.innerHTML = pendingRefs.map((r, i) => {
+    const label = r.from && r.to ? `${r.path}:${r.from}-${r.to}` : r.path;
+    return `<div class="ref-preview-item">
+      <span class="ref-icon">📂</span>
+      <span class="ref-label">${esc(label)}</span>
+      <button class="file-remove" onclick="removePendingRef(${i})">✕</button>
+    </div>`;
+  }).join('');
+  container.hidden = false;
+}
+
 function clearPendingFiles() {
   pendingFiles.length = 0;
   const preview = $('#filePreview');
diff --git a/wwwroot/js/pages/chat-page.js b/wwwroot/js/pages/chat-page.js
index 4442228..ab75eef 100644
--- a/wwwroot/js/pages/chat-page.js
+++ b/wwwroot/js/pages/chat-page.js
@@ -50,12 +50,8 @@ registerPage('chat', {
         openFileExplorer({
           sessionId,
           onSelect(ref) {
-            const input = document.getElementById('input');
-            if (!input) return;
-            const tag = `[Datei: ${ref}]`;
-            const pos = input.selectionStart || input.value.length;
-            input.value = input.value.substring(0, pos) + tag + input.value.substring(pos);
-            input.focus();
+            addPendingRef(ref);
+            document.getElementById('input')?.focus();
           }
         });
       });
@@ -117,5 +113,6 @@ registerPage('chat', {
     loadedArchiveCount = 0;
     isStreaming = false;
     clearPendingFiles();
+    clearPendingRefs();
   }
 });