diff --git a/services/targo-hub/lib/roster.js b/services/targo-hub/lib/roster.js
index 0c4d384..edf7c8f 100644
--- a/services/targo-hub/lib/roster.js
+++ b/services/targo-hub/lib/roster.js
@@ -677,10 +677,18 @@ async function handle (req, res, method, path, url) {
   if (path === '/roster/publish-week' && method === 'POST') {
     const b = await parseBody(req)
     const existing = await fetchAssignments(b.start, b.days || 7)
-    let deleted = 0
-    for (const a of existing) { const r = await retryWrite(() => erp.remove('Shift Assignment', a.name)); if (r.ok) deleted++ }
-    let created = 0; let errors = 0
-    for (const a of (b.assignments || [])) {
+    const desired = b.assignments || []
+    // DIFF par clé tech|date|shift : on ne touche QUE ce qui a changé (≫ rapide vs wipe+recreate complet).
+    const keyOf = (a) => a.tech + '|' + a.date + '|' + a.shift
+    const existByKey = {}; for (const a of existing) existByKey[keyOf(a)] = a
+    const desiredKeys = new Set(desired.map(keyOf))
+    let deleted = 0; let created = 0; let errors = 0; let unchanged = 0
+    for (const a of existing) { // supprimer ceux qui ne sont plus voulus
+      if (desiredKeys.has(keyOf(a))) continue
+      const r = await retryWrite(() => erp.remove('Shift Assignment', a.name)); if (r.ok) deleted++
+    }
+    for (const a of desired) { // créer seulement les nouveaux ; ignorer les inchangés
+      if (existByKey[keyOf(a)]) { unchanged++; continue }
       const r = await retryWrite(() => erp.create('Shift Assignment', {
         technician: a.tech, technician_name: a.tech_name || '', assignment_date: a.date,
         shift_template: a.shift, zone: a.zone || '', hours: Number(a.hours) || 0,
@@ -704,7 +712,7 @@ async function handle (req, res, method, path, url) {
         }
       } catch (e) { /* notif non bloquante */ }
     }
-    return json(res, 200, { ok: errors === 0, created, deleted, errors, notified })
+    return json(res, 200, { ok: errors === 0, created, deleted, errors, notified, unchanged })
   }
   // Modifier / supprimer un type de shift (Shift Template)
   const mTpl = path.match(/^\/roster\/template\/(.+)$/)