diff --git a/deploy/dalidou/cron-backup.sh b/deploy/dalidou/cron-backup.sh
new file mode 100644
index 0000000..fd81bf3
--- /dev/null
+++ b/deploy/dalidou/cron-backup.sh
@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+#
+# deploy/dalidou/cron-backup.sh
+# ------------------------------
+# Daily backup + retention cleanup via the AtoCore API.
+#
+# Intended to run from cron on Dalidou:
+#
+#   # Daily at 03:00 UTC
+#   0 3 * * * /srv/storage/atocore/app/deploy/dalidou/cron-backup.sh >> /var/log/atocore-backup.log 2>&1
+#
+# What it does:
+#   1. Creates a runtime backup (db + registry, no chroma by default)
+#   2. Runs retention cleanup with --confirm to delete old snapshots
+#   3. Logs results to stdout (captured by cron into the log file)
+#
+# Fail-open: exits 0 even on API errors so cron doesn't send noise
+# emails. Check /var/log/atocore-backup.log for diagnostics.
+#
+# Environment variables:
+#   ATOCORE_URL           default http://127.0.0.1:8100
+#   ATOCORE_BACKUP_CHROMA default false (set to "true" for cold chroma copy)
+
+set -euo pipefail
+
+ATOCORE_URL="${ATOCORE_URL:-http://127.0.0.1:8100}"
+INCLUDE_CHROMA="${ATOCORE_BACKUP_CHROMA:-false}"
+TIMESTAMP="$(date -u +%Y-%m-%dT%H:%M:%SZ)"
+
+log() { printf '[%s] %s\n' "$TIMESTAMP" "$*"; }
+
+log "=== AtoCore daily backup starting ==="
+
+# Step 1: Create backup
+log "Step 1: creating backup (chroma=$INCLUDE_CHROMA)"
+BACKUP_RESULT=$(curl -sf -X POST \
+    -H "Content-Type: application/json" \
+    -d "{\"include_chroma\": $INCLUDE_CHROMA}" \
+    "$ATOCORE_URL/admin/backup" 2>&1) || {
+    log "ERROR: backup creation failed: $BACKUP_RESULT"
+    exit 0
+}
+log "Backup created: $BACKUP_RESULT"
+
+# Step 2: Retention cleanup (confirm=true to actually delete)
+log "Step 2: running retention cleanup"
+CLEANUP_RESULT=$(curl -sf -X POST \
+    -H "Content-Type: application/json" \
+    -d '{"confirm": true}' \
+    "$ATOCORE_URL/admin/backup/cleanup" 2>&1) || {
+    log "ERROR: cleanup failed: $CLEANUP_RESULT"
+    exit 0
+}
+log "Cleanup result: $CLEANUP_RESULT"
+
+log "=== AtoCore daily backup complete ==="
diff --git a/src/atocore/api/routes.py b/src/atocore/api/routes.py
index 4dfe288..5ad8f80 100644
--- a/src/atocore/api/routes.py
+++ b/src/atocore/api/routes.py
@@ -49,6 +49,7 @@ from atocore.memory.service import (
 )
 from atocore.observability.logger import get_logger
 from atocore.ops.backup import (
+    cleanup_old_backups,
     create_runtime_backup,
     list_runtime_backups,
     validate_backup,
@@ -511,6 +512,7 @@ class InteractionRecordRequest(BaseModel):
     chunks_used: list[str] = []
     context_pack: dict | None = None
     reinforce: bool = True
+    extract: bool = False
 
 
 @router.post("/interactions")
@@ -536,6 +538,7 @@ def api_record_interaction(req: InteractionRecordRequest) -> dict:
             chunks_used=req.chunks_used,
             context_pack=req.context_pack,
             reinforce=req.reinforce,
+            extract=req.extract,
         )
     except ValueError as e:
         raise HTTPException(status_code=400, detail=str(e))
@@ -731,6 +734,25 @@ def api_list_backups() -> dict:
     }
 
 
+class BackupCleanupRequest(BaseModel):
+    confirm: bool = False
+
+
+@router.post("/admin/backup/cleanup")
+def api_cleanup_backups(req: BackupCleanupRequest | None = None) -> dict:
+    """Apply retention policy to old backup snapshots.
+
+    Dry-run by default. Pass ``confirm: true`` to actually delete.
+    Retention: last 7 daily, last 4 weekly (Sundays), last 6 monthly (1st).
+    """
+    payload = req or BackupCleanupRequest()
+    try:
+        return cleanup_old_backups(confirm=payload.confirm)
+    except Exception as e:
+        log.error("admin_cleanup_failed", error=str(e))
+        raise HTTPException(status_code=500, detail=f"Cleanup failed: {e}")
+
+
 @router.get("/admin/backup/{stamp}/validate")
 def api_validate_backup(stamp: str) -> dict:
     """Validate that a previously created backup is structurally usable."""
diff --git a/src/atocore/interactions/service.py b/src/atocore/interactions/service.py
index fd45ad4..00374e8 100644
--- a/src/atocore/interactions/service.py
+++ b/src/atocore/interactions/service.py
@@ -63,6 +63,7 @@ def record_interaction(
     chunks_used: list[str] | None = None,
     context_pack: dict | None = None,
     reinforce: bool = True,
+    extract: bool = False,
 ) -> Interaction:
     """Persist a single interaction to the audit trail.
 
@@ -163,6 +164,30 @@ def record_interaction(
                 error=str(exc),
             )
 
+    if extract and (response or response_summary):
+        try:
+            from atocore.memory.extractor import extract_candidates_from_interaction
+            from atocore.memory.service import create_memory
+
+            candidates = extract_candidates_from_interaction(interaction)
+            for candidate in candidates:
+                try:
+                    create_memory(
+                        memory_type=candidate.memory_type,
+                        content=candidate.content,
+                        project=candidate.project,
+                        confidence=candidate.confidence,
+                        status="candidate",
+                    )
+                except ValueError:
+                    pass  # duplicate or validation error — skip silently
+        except Exception as exc:  # pragma: no cover - extraction must never block capture
+            log.error(
+                "extraction_failed_on_capture",
+                interaction_id=interaction_id,
+                error=str(exc),
+            )
+
     return interaction