diff --git a/app/api/projects/[projectId]/agent/sessions/[sessionId]/approve/route.ts b/app/api/projects/[projectId]/agent/sessions/[sessionId]/approve/route.ts
index 9efb6a9..a26f258 100644
--- a/app/api/projects/[projectId]/agent/sessions/[sessionId]/approve/route.ts
+++ b/app/api/projects/[projectId]/agent/sessions/[sessionId]/approve/route.ts
@@ -44,7 +44,7 @@ export async function POST(
     const rows = await query<{ data: Record<string, unknown> }>(
       `SELECT p.data FROM fs_projects p
        JOIN fs_users u ON u.id = p.user_id
-       WHERE p.id = $1 AND u.data->>'email' = $2 LIMIT 1`,
+       WHERE p.id = $1::uuid AND u.data->>'email' = $2 LIMIT 1`,
       [projectId, session.user.email]
     );
     if (rows.length === 0) {
@@ -59,7 +59,7 @@ export async function POST(
 
     // Find the session to get the appName (so we can find the right Coolify UUID)
     const sessionRows = await query<{ app_name: string; status: string }>(
-      `SELECT app_name, status FROM agent_sessions WHERE id = $1 AND project_id = $2 LIMIT 1`,
+      `SELECT app_name, status FROM agent_sessions WHERE id = $1::uuid AND project_id = $2::uuid LIMIT 1`,
       [sessionId, projectId]
     );
     if (sessionRows.length === 0) {
@@ -109,7 +109,7 @@ export async function POST(
       `UPDATE agent_sessions
        SET status = 'approved', completed_at = COALESCE(completed_at, now()), updated_at = now(),
            output = output || $1::jsonb
-       WHERE id = $2`,
+       WHERE id = $2::uuid`,
       [
         JSON.stringify([{
           ts: new Date().toISOString(),
diff --git a/app/api/projects/[projectId]/agent/sessions/[sessionId]/route.ts b/app/api/projects/[projectId]/agent/sessions/[sessionId]/route.ts
index 36d4672..6cccecc 100644
--- a/app/api/projects/[projectId]/agent/sessions/[sessionId]/route.ts
+++ b/app/api/projects/[projectId]/agent/sessions/[sessionId]/route.ts
@@ -42,7 +42,7 @@ export async function GET(
        FROM agent_sessions s
        JOIN fs_projects p ON p.id = s.project_id
        JOIN fs_users u ON u.id = p.user_id
-       WHERE s.id = $1 AND s.project_id = $2 AND u.data->>'email' = $3
+       WHERE s.id = $1::uuid AND s.project_id = $2::uuid AND u.data->>'email' = $3
        LIMIT 1`,
       [sessionId, projectId, session.user.email]
     );
@@ -110,7 +110,7 @@ export async function PATCH(
 
     values.push(sessionId);
     await query(
-      `UPDATE agent_sessions SET ${updates.join(", ")} WHERE id = $${idx}`,
+      `UPDATE agent_sessions SET ${updates.join(", ")} WHERE id = $${idx}::uuid`,
       values
     );
 
diff --git a/app/api/projects/[projectId]/agent/sessions/[sessionId]/stop/route.ts b/app/api/projects/[projectId]/agent/sessions/[sessionId]/stop/route.ts
index f753347..ef3e485 100644
--- a/app/api/projects/[projectId]/agent/sessions/[sessionId]/stop/route.ts
+++ b/app/api/projects/[projectId]/agent/sessions/[sessionId]/stop/route.ts
@@ -21,7 +21,7 @@ export async function POST(
       `SELECT s.status FROM agent_sessions s
        JOIN fs_projects p ON p.id = s.project_id
        JOIN fs_users u ON u.id = p.user_id
-       WHERE s.id = $1 AND s.project_id = $2 AND u.data->>'email' = $3 LIMIT 1`,
+       WHERE s.id = $1::uuid AND s.project_id = $2::uuid AND u.data->>'email' = $3 LIMIT 1`,
       [sessionId, projectId, session.user.email]
     );
 
@@ -45,7 +45,7 @@ export async function POST(
       `UPDATE agent_sessions
        SET status = 'stopped', completed_at = now(), updated_at = now(),
            output = output || '[{"ts": "now", "type": "info", "text": "Stopped by user."}]'::jsonb
-       WHERE id = $1`,
+       WHERE id = $1::uuid`,
       [sessionId]
     );
 
diff --git a/app/api/projects/[projectId]/agent/sessions/route.ts b/app/api/projects/[projectId]/agent/sessions/route.ts
index 44cce77..87a31fa 100644
--- a/app/api/projects/[projectId]/agent/sessions/route.ts
+++ b/app/api/projects/[projectId]/agent/sessions/route.ts
@@ -69,7 +69,7 @@ export async function POST(
     const owns = await query<{ id: string; data: Record<string, unknown> }>(
       `SELECT p.id, p.data FROM fs_projects p
        JOIN fs_users u ON u.id = p.user_id
-       WHERE p.id = $1 AND u.data->>'email' = $2 LIMIT 1`,
+       WHERE p.id = $1::uuid AND u.data->>'email' = $2 LIMIT 1`,
       [projectId, session.user.email]
     );
     if (owns.length === 0) {
@@ -81,7 +81,7 @@ export async function POST(
     // Create the session row
     const rows = await query<{ id: string }>(
       `INSERT INTO agent_sessions (project_id, app_name, app_path, task, status, started_at)
-       VALUES ($1, $2, $3, $4, 'running', now())
+       VALUES ($1::uuid, $2, $3, $4, 'running', now())
        RETURNING id`,
       [projectId, appName, appPath, task.trim()]
     );
@@ -114,7 +114,7 @@ export async function POST(
                'type', 'error',
                'text', 'Agent runner service is not connected yet. Phase 2 implementation pending.'
              ))
-         WHERE id = $1`,
+         WHERE id = $1::uuid`,
         [sessionId]
       ).catch(() => {});
     });
@@ -159,7 +159,7 @@ export async function GET(
        FROM agent_sessions s
        JOIN fs_projects p ON p.id = s.project_id
        JOIN fs_users u ON u.id = p.user_id
-       WHERE s.project_id = $1 AND u.data->>'email' = $2
+       WHERE s.project_id = $1::uuid AND u.data->>'email' = $2
        ORDER BY s.created_at DESC
        LIMIT 50`,
       [projectId, session.user.email]