diff --git a/packages/memory-service/src/episodic/index.js b/packages/memory-service/src/episodic/index.js
index 69b68ba..ae38be7 100644
--- a/packages/memory-service/src/episodic/index.js
+++ b/packages/memory-service/src/episodic/index.js
@@ -65,13 +65,20 @@ function deleteSession(id) {
 
 function updateSession(id, { name, projectId } = {}) {
   const db = getDB();
-  db.prepare(`
-    UPDATE sessions
-    SET name = ?,
-        project_id = COALESCE(?, project_id),
-        updated_at = unixepoch()
-    WHERE id = ?
-  `).run(name ?? null, projectId ?? null, id);
+  
+  // Build update dynamically based on what was provided
+  const updates = [];
+  const values = [];
+
+  if (name !== undefined) { updates.push('name = ?'); values.push(name ?? null); }
+  if (projectId !== undefined) { updates.push('project_id = ?'); values.push(projectId ?? null); }
+  
+  if (updates.length === 0) return getSession(id);
+  
+  updates.push('updated_at = unixepoch()');
+  values.push(id);
+
+  db.prepare(`UPDATE sessions SET ${updates.join(', ')} WHERE id = ?`).run(...values);
   return getSession(id);
 }
 
diff --git a/packages/orchestration-service/src/routes/sessions.js b/packages/orchestration-service/src/routes/sessions.js
index 5e3bc97..8a2aaa8 100644
--- a/packages/orchestration-service/src/routes/sessions.js
+++ b/packages/orchestration-service/src/routes/sessions.js
@@ -31,15 +31,22 @@ router.get('/', async (req, res) => {
 });
 
 router.patch('/:sessionId', async (req, res) => {
-    const { name, projectId } = req.body;
-    if (!name?.trim()) return res.status(400).json({ error: 'name is required' });
+  const { name, projectId } = req.body;
+  
+  // Allow patch with just projectId, or just name, or both
+  if (!name?.trim() && projectId === undefined) {
+    return res.status(400).json({ error: 'name or projectId is required' });
+  }
 
-    try {
-        const session = await memory.updateSession(req.params.sessionId, { name, projectId });
-        res.json(session);
-    } catch (err) {
-        res.status(500).json({ error: err.message });
-    }
+  try {
+    const session = await memory.updateSession(req.params.sessionId, { 
+      name: name?.trim() || undefined, 
+      projectId 
+    });
+    res.json(session);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
 });
 
 router.delete('/:sessionId', async (req, res) => {