Allow agent personality to be nullable, in which case the default prompt will be used.

src/khoj/database/migrations/0083_alter_agent_output_modes_alter_agent_personality_and_more.py

@@ -0,0 +1,71 @@
+# Generated by Django 5.0.10 on 2025-01-24 16:23
+
+import django.contrib.postgres.fields
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("database", "0082_merge_20250121_1842"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="agent",
+            name="output_modes",
+            field=django.contrib.postgres.fields.ArrayField(
+                base_field=models.CharField(
+                    choices=[("image", "Image"), ("automation", "Automation"), ("diagram", "Diagram")], max_length=200
+                ),
+                blank=True,
+                default=list,
+                null=True,
+                size=None,
+            ),
+        ),
+        migrations.AlterField(
+            model_name="agent",
+            name="personality",
+            field=models.TextField(blank=True, default=None, null=True),
+        ),
+        migrations.AlterField(
+            model_name="agent",
+            name="style_color",
+            field=models.CharField(
+                choices=[
+                    ("blue", "Blue"),
+                    ("green", "Green"),
+                    ("red", "Red"),
+                    ("yellow", "Yellow"),
+                    ("orange", "Orange"),
+                    ("purple", "Purple"),
+                    ("pink", "Pink"),
+                    ("teal", "Teal"),
+                    ("cyan", "Cyan"),
+                    ("lime", "Lime"),
+                    ("indigo", "Indigo"),
+                    ("fuchsia", "Fuchsia"),
+                    ("rose", "Rose"),
+                    ("sky", "Sky"),
+                    ("amber", "Amber"),
+                    ("emerald", "Emerald"),
+                ],
+                default="orange",
+                max_length=200,
+            ),
+        ),
+        migrations.AlterField(
+            model_name="processlock",
+            name="name",
+            field=models.CharField(
+                choices=[
+                    ("index_content", "Index Content"),
+                    ("scheduled_job", "Scheduled Job"),
+                    ("schedule_leader", "Schedule Leader"),
+                    ("apply_migrations", "Apply Migrations"),
+                ],
+                max_length=200,
+                unique=True,
+            ),
+        ),
+    ]

src/khoj/database/models/__init__.py

@@ -293,7 +293,7 @@ class Agent(DbBaseModel):
         KhojUser, on_delete=models.CASCADE, default=None, null=True, blank=True
     )  # Creator will only be null when the agents are managed by admin
     name = models.CharField(max_length=200)
-    personality = models.TextField()
+    personality = models.TextField(default=None, null=True, blank=True)
     input_tools = ArrayField(
         models.CharField(max_length=200, choices=InputToolOptions.choices), default=list, null=True, blank=True
     )