core/relay/server.js

@@ -4,9 +4,17 @@
 import express from "express";
 import dotenv from "dotenv";
 import cors from "cors";
+import fs from "fs/promises";
+import path from "path";
+import { fileURLToPath } from "url";
 
 dotenv.config();
 
+// ES module __dirname workaround
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const SESSIONS_DIR = path.join(__dirname, "sessions");
+
 const app = express();
 app.use(cors());
 app.use(express.json());
@@ -173,20 +181,182 @@ app.post("/chat", async (req, res) => {
 // -----------------------------------------------------
 // SESSION ENDPOINTS (for UI)
 // -----------------------------------------------------
-// In-memory session storage (could be replaced with a database)
-const sessions = new Map();
+// Helper functions for session persistence
+async function ensureSessionsDir() {
+  try {
+    await fs.mkdir(SESSIONS_DIR, { recursive: true });
+  } catch (err) {
+    console.error("Failed to create sessions directory:", err);
+  }
+}
 
-app.get("/sessions/:id", (req, res) => {
+async function loadSession(sessionId) {
+  try {
+    const sessionPath = path.join(SESSIONS_DIR, `${sessionId}.json`);
+    const data = await fs.readFile(sessionPath, "utf-8");
+    return JSON.parse(data);
+  } catch (err) {
+    // File doesn't exist or is invalid - return empty array
+    return [];
+  }
+}
+
+async function saveSession(sessionId, history, metadata = {}) {
+  try {
+    await ensureSessionsDir();
+    const sessionPath = path.join(SESSIONS_DIR, `${sessionId}.json`);
+    const metadataPath = path.join(SESSIONS_DIR, `${sessionId}.meta.json`);
+
+    // Save history
+    await fs.writeFile(sessionPath, JSON.stringify(history, null, 2), "utf-8");
+
+    // Save metadata (name, etc.)
+    await fs.writeFile(metadataPath, JSON.stringify(metadata, null, 2), "utf-8");
+
+    return true;
+  } catch (err) {
+    console.error(`Failed to save session ${sessionId}:`, err);
+    return false;
+  }
+}
+
+async function loadSessionMetadata(sessionId) {
+  try {
+    const metadataPath = path.join(SESSIONS_DIR, `${sessionId}.meta.json`);
+    const data = await fs.readFile(metadataPath, "utf-8");
+    return JSON.parse(data);
+  } catch (err) {
+    // No metadata file, return default
+    return { name: sessionId };
+  }
+}
+
+async function saveSessionMetadata(sessionId, metadata) {
+  try {
+    await ensureSessionsDir();
+    const metadataPath = path.join(SESSIONS_DIR, `${sessionId}.meta.json`);
+    await fs.writeFile(metadataPath, JSON.stringify(metadata, null, 2), "utf-8");
+    return true;
+  } catch (err) {
+    console.error(`Failed to save metadata for ${sessionId}:`, err);
+    return false;
+  }
+}
+
+async function listSessions() {
+  try {
+    await ensureSessionsDir();
+    const files = await fs.readdir(SESSIONS_DIR);
+    const sessions = [];
+
+    for (const file of files) {
+      if (file.endsWith(".json") && !file.endsWith(".meta.json")) {
+        const sessionId = file.replace(".json", "");
+        const sessionPath = path.join(SESSIONS_DIR, file);
+        const stats = await fs.stat(sessionPath);
+
+        // Try to read the session to get message count
+        let messageCount = 0;
+        try {
+          const data = await fs.readFile(sessionPath, "utf-8");
+          const history = JSON.parse(data);
+          messageCount = history.length;
+        } catch (e) {
+          // Invalid JSON, skip
+        }
+
+        // Load metadata (name)
+        const metadata = await loadSessionMetadata(sessionId);
+
+        sessions.push({
+          id: sessionId,
+          name: metadata.name || sessionId,
+          lastModified: stats.mtime,
+          messageCount
+        });
+      }
+    }
+
+    // Sort by last modified (newest first)
+    sessions.sort((a, b) => b.lastModified - a.lastModified);
+    return sessions;
+  } catch (err) {
+    console.error("Failed to list sessions:", err);
+    return [];
+  }
+}
+
+async function deleteSession(sessionId) {
+  try {
+    const sessionPath = path.join(SESSIONS_DIR, `${sessionId}.json`);
+    const metadataPath = path.join(SESSIONS_DIR, `${sessionId}.meta.json`);
+
+    // Delete session file
+    await fs.unlink(sessionPath);
+
+    // Delete metadata file (if exists)
+    try {
+      await fs.unlink(metadataPath);
+    } catch (e) {
+      // Metadata file doesn't exist, that's ok
+    }
+
+    return true;
+  } catch (err) {
+    console.error(`Failed to delete session ${sessionId}:`, err);
+    return false;
+  }
+}
+
+// GET /sessions - List all sessions
+app.get("/sessions", async (req, res) => {
+  const sessions = await listSessions();
+  res.json(sessions);
+});
+
+// GET /sessions/:id - Get specific session history
+app.get("/sessions/:id", async (req, res) => {
   const sessionId = req.params.id;
-  const history = sessions.get(sessionId) || [];
+  const history = await loadSession(sessionId);
   res.json(history);
 });
 
-app.post("/sessions/:id", (req, res) => {
+// POST /sessions/:id - Save session history
+app.post("/sessions/:id", async (req, res) => {
   const sessionId = req.params.id;
   const history = req.body;
-  sessions.set(sessionId, history);
-  res.json({ ok: true, saved: history.length });
+  const success = await saveSession(sessionId, history);
+
+  if (success) {
+    res.json({ ok: true, saved: history.length });
+  } else {
+    res.status(500).json({ error: "Failed to save session" });
+  }
+});
+
+// PATCH /sessions/:id/metadata - Update session metadata (name, etc.)
+app.patch("/sessions/:id/metadata", async (req, res) => {
+  const sessionId = req.params.id;
+  const metadata = req.body;
+  const success = await saveSessionMetadata(sessionId, metadata);
+
+  if (success) {
+    res.json({ ok: true, metadata });
+  } else {
+    res.status(500).json({ error: "Failed to update metadata" });
+  }
+});
+
+// DELETE /sessions/:id - Delete a session
+app.delete("/sessions/:id", async (req, res) => {
+  const sessionId = req.params.id;
+  const success = await deleteSession(sessionId);
+
+  if (success) {
+    res.json({ ok: true, deleted: sessionId });
+  } else {
+    res.status(500).json({ error: "Failed to delete session" });
+  }
 });
 
 // -----------------------------------------------------

core/relay/sessions/sess-6rxu7eia.meta.json

@@ -0,0 +1,3 @@
+{
+  "name": "My Coding Session"
+}

core/relay/sessions/sess-dnm44wyb.json

@@ -0,0 +1,18 @@
+[
+  {
+    "role": "user",
+    "content": "Hello! this is a new test session. Do you know who i am?"
+  },
+  {
+    "role": "assistant",
+    "content": "Hi! In this session, I don't have information about your previous interactions. You can tell me who you are or any other details you'd like to share. How can I assist you today?"
+  },
+  {
+    "role": "user",
+    "content": "sure im brian! i am designing you... you are a robot!"
+  },
+  {
+    "role": "assistant",
+    "content": "Hello Brian! Nice to meet you. As an AI, I don't have physical design capabilities, but I'm here to help with any information or tasks you need. How can I assist you in your design process?"
+  }
+]

core/relay/sessions/sess-dnm44wyb.meta.json

@@ -0,0 +1 @@
+{}

core/relay/sessions/sess-l08ndm60.meta.json

@@ -0,0 +1 @@
+{"name":"Session 2"}

core/ui/index.html

@@ -81,6 +81,14 @@
             </label>
           </div>
         </div>
+
+        <div class="settings-section" style="margin-top: 24px;">
+          <h4>Session Management</h4>
+          <p class="settings-desc">Manage your saved chat sessions:</p>
+          <div id="sessionList" class="session-list">
+            <p style="color: var(--text-fade); font-size: 0.85rem;">Loading sessions...</p>
+          </div>
+        </div>
       </div>
       <div class="modal-footer">
         <button id="saveSettingsBtn" class="primary-btn">Save</button>
@@ -99,21 +107,28 @@
 
     let history = [];
 	let currentSession = localStorage.getItem("currentSession") || null;
-	let sessions = JSON.parse(localStorage.getItem("sessions") || "[]");
+	let sessions = []; // Now loaded from server
 
-	function saveSessions() {
-	  localStorage.setItem("sessions", JSON.stringify(sessions));
-	  localStorage.setItem("currentSession", currentSession);
+	async function loadSessionsFromServer() {
+	  try {
+		const resp = await fetch(`${RELAY_BASE}/sessions`);
+		const serverSessions = await resp.json();
+		sessions = serverSessions;
+		return sessions;
+	  } catch (e) {
+		console.error("Failed to load sessions from server:", e);
+		return [];
+	  }
 	}
 
-	function renderSessions() {
+	async function renderSessions() {
 	  const select = document.getElementById("sessions");
 	  select.innerHTML = "";
 
 	  sessions.forEach(s => {
 		const opt = document.createElement("option");
 		opt.value = s.id;
-		opt.textContent = s.name;
+		opt.textContent = s.name || s.id;
 		if (s.id === currentSession) opt.selected = true;
 		select.appendChild(opt);
 	  });
@@ -121,7 +136,21 @@
 
 	function getSessionName(id) {
 	  const s = sessions.find(s => s.id === id);
-	  return s ? s.name : id;
+	  return s ? (s.name || s.id) : id;
+	}
+
+	async function saveSessionMetadata(sessionId, name) {
+	  try {
+		await fetch(`${RELAY_BASE}/sessions/${sessionId}/metadata`, {
+		  method: "PATCH",
+		  headers: { "Content-Type": "application/json" },
+		  body: JSON.stringify({ name })
+		});
+		return true;
+	  } catch (e) {
+		console.error("Failed to save session metadata:", e);
+		return false;
+	  }
 	}
 
     async function loadSession(id) {
@@ -258,55 +287,75 @@
         localStorage.setItem("theme", isDark ? "dark" : "light");
       });
 
-      // Sessions
-	// Populate dropdown initially
-	renderSessions();
-	  // Ensure we have at least one session
-	  if (!currentSession) {
-		const id = generateSessionId();
-		const name = "default";
-		sessions.push({ id, name });
-		currentSession = id;
-		saveSessions();
-		renderSessions();
-	  }
+      // Sessions - Load from server
+	  (async () => {
+		await loadSessionsFromServer();
+		await renderSessions();
 
-  // Load current session history (if it exists on Relay)
-  loadSession(currentSession);
+		// Ensure we have at least one session
+		if (sessions.length === 0) {
+		  const id = generateSessionId();
+		  const name = "default";
+		  currentSession = id;
+		  history = [];
+		  await saveSession(); // Create empty session on server
+		  await saveSessionMetadata(id, name);
+		  await loadSessionsFromServer();
+		  await renderSessions();
+		  localStorage.setItem("currentSession", currentSession);
+		} else {
+		  // If no current session or current session doesn't exist, use first one
+		  if (!currentSession || !sessions.find(s => s.id === currentSession)) {
+			currentSession = sessions[0].id;
+			localStorage.setItem("currentSession", currentSession);
+		  }
+		}
 
+		// Load current session history
+		if (currentSession) {
+		  await loadSession(currentSession);
+		}
+	  })();
 
 	// Switch session
 	document.getElementById("sessions").addEventListener("change", async e => {
 	  currentSession = e.target.value;
 	  history = [];
-	  saveSessions();
+	  localStorage.setItem("currentSession", currentSession);
 	  addMessage("system", `Switched to session: ${getSessionName(currentSession)}`);
-	  await loadSession(currentSession); // ✅ load the chat history from Relay
+	  await loadSession(currentSession);
 	});
 
-
 	// Create new session
-	document.getElementById("newSessionBtn").addEventListener("click", () => {
+	document.getElementById("newSessionBtn").addEventListener("click", async () => {
 	  const name = prompt("Enter new session name:");
 	  if (!name) return;
 	  const id = generateSessionId();
-	  sessions.push({ id, name });
 	  currentSession = id;
 	  history = [];
-	  saveSessions();
-	  renderSessions();
+	  localStorage.setItem("currentSession", currentSession);
+
+	  // Create session on server
+	  await saveSession();
+	  await saveSessionMetadata(id, name);
+	  await loadSessionsFromServer();
+	  await renderSessions();
+
 	  addMessage("system", `Created session: ${name}`);
 	});
 
 	// Rename session
-	document.getElementById("renameSessionBtn").addEventListener("click", () => {
+	document.getElementById("renameSessionBtn").addEventListener("click", async () => {
 	  const session = sessions.find(s => s.id === currentSession);
 	  if (!session) return;
-	  const newName = prompt("Rename session:", session.name);
+	  const newName = prompt("Rename session:", session.name || currentSession);
 	  if (!newName) return;
-	  session.name = newName;
-	  saveSessions();
-	  renderSessions();
+
+	  // Update metadata on server
+	  await saveSessionMetadata(currentSession, newName);
+	  await loadSessionsFromServer();
+	  await renderSessions();
+
 	  addMessage("system", `Session renamed to: ${newName}`);
 	});
 
@@ -335,9 +384,90 @@
         document.querySelector(`input[name="backend"][value="${savedBackend}"]`).checked = true;
       }
 
-      // Show modal
+      // Session management functions
+      async function loadSessionList() {
+        try {
+          // Reload from server to get latest
+          await loadSessionsFromServer();
+
+          const sessionListEl = document.getElementById("sessionList");
+          if (sessions.length === 0) {
+            sessionListEl.innerHTML = '<p style="color: var(--text-fade); font-size: 0.85rem;">No saved sessions found</p>';
+            return;
+          }
+
+          sessionListEl.innerHTML = "";
+          sessions.forEach(sess => {
+            const sessionItem = document.createElement("div");
+            sessionItem.className = "session-item";
+
+            const sessionInfo = document.createElement("div");
+            sessionInfo.className = "session-info";
+
+            const sessionName = sess.name || sess.id;
+            const lastModified = new Date(sess.lastModified).toLocaleString();
+
+            sessionInfo.innerHTML = `
+              <strong>${sessionName}</strong>
+              <small>${sess.messageCount} messages • ${lastModified}</small>
+            `;
+
+            const deleteBtn = document.createElement("button");
+            deleteBtn.className = "session-delete-btn";
+            deleteBtn.textContent = "🗑️";
+            deleteBtn.title = "Delete session";
+            deleteBtn.onclick = async () => {
+              if (!confirm(`Delete session "${sessionName}"?`)) return;
+
+              try {
+                await fetch(`${RELAY_BASE}/sessions/${sess.id}`, { method: "DELETE" });
+
+                // Reload sessions from server
+                await loadSessionsFromServer();
+
+                // If we deleted the current session, switch to another or create new
+                if (currentSession === sess.id) {
+                  if (sessions.length > 0) {
+                    currentSession = sessions[0].id;
+                    localStorage.setItem("currentSession", currentSession);
+                    history = [];
+                    await loadSession(currentSession);
+                  } else {
+                    const id = generateSessionId();
+                    const name = "default";
+                    currentSession = id;
+                    localStorage.setItem("currentSession", currentSession);
+                    history = [];
+                    await saveSession();
+                    await saveSessionMetadata(id, name);
+                    await loadSessionsFromServer();
+                  }
+                }
+
+                // Refresh both the dropdown and the settings list
+                await renderSessions();
+                await loadSessionList();
+
+                addMessage("system", `Deleted session: ${sessionName}`);
+              } catch (e) {
+                alert("Failed to delete session: " + e.message);
+              }
+            };
+
+            sessionItem.appendChild(sessionInfo);
+            sessionItem.appendChild(deleteBtn);
+            sessionListEl.appendChild(sessionItem);
+          });
+        } catch (e) {
+          const sessionListEl = document.getElementById("sessionList");
+          sessionListEl.innerHTML = '<p style="color: #ff3333; font-size: 0.85rem;">Failed to load sessions</p>';
+        }
+      }
+
+      // Show modal and load session list
       settingsBtn.addEventListener("click", () => {
         settingsModal.classList.add("show");
+        loadSessionList(); // Refresh session list when opening settings
       });
 
       // Hide modal functions

core/ui/style.css

@@ -362,3 +362,63 @@ select:hover {
   background: #ff7a33;
   box-shadow: var(--accent-glow);
 }
+
+/* Session List */
+.session-list {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  max-height: 300px;
+  overflow-y: auto;
+}
+
+.session-item {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 12px;
+  border: 1px solid rgba(255,102,0,0.3);
+  border-radius: 6px;
+  background: rgba(255,102,0,0.05);
+  transition: all 0.2s;
+}
+
+.session-item:hover {
+  border-color: var(--accent);
+  background: rgba(255,102,0,0.1);
+}
+
+.session-info {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  flex: 1;
+}
+
+.session-info strong {
+  color: var(--text-main);
+  font-size: 0.95rem;
+}
+
+.session-info small {
+  color: var(--text-fade);
+  font-size: 0.75rem;
+}
+
+.session-delete-btn {
+  background: transparent;
+  border: 1px solid rgba(255,102,0,0.5);
+  color: var(--accent);
+  padding: 6px 10px;
+  border-radius: 4px;
+  cursor: pointer;
+  font-size: 1rem;
+  transition: all 0.2s;
+}
+
+.session-delete-btn:hover {
+  background: rgba(255,0,0,0.2);
+  border-color: #ff3333;
+  color: #ff3333;
+  box-shadow: 0 0 8px rgba(255,0,0,0.3);
+}