diff --git a/drizzle/0013_habit_calendar_revision.sql b/drizzle/0013_habit_calendar_revision.sql
new file mode 100644
index 0000000..9139f88
--- /dev/null
+++ b/drizzle/0013_habit_calendar_revision.sql
@@ -0,0 +1 @@
+ALTER TABLE habits ADD COLUMN calendar_revision integer NOT NULL DEFAULT 0;
diff --git a/drizzle/meta/0013_snapshot.json b/drizzle/meta/0013_snapshot.json
new file mode 100644
index 0000000..b90571e
--- /dev/null
+++ b/drizzle/meta/0013_snapshot.json
@@ -0,0 +1,1225 @@
+{
+  "version": "6",
+  "dialect": "sqlite",
+  "id": "4c5b56f0-04cd-405a-afdd-8e4ca3793332",
+  "prevId": "39a7a2c2-c411-4e0a-ba41-9e4abdc8fbcf",
+  "tables": {
+    "combined_charts": {
+      "name": "combined_charts",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "habit_ids": {
+          "name": "habit_ids",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "settings": {
+          "name": "settings",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "combined_charts_user_idx": {
+          "name": "combined_charts_user_idx",
+          "columns": [
+            "user_id"
+          ],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "combined_charts_user_id_users_id_fk": {
+          "name": "combined_charts_user_id_users_id_fk",
+          "tableFrom": "combined_charts",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "discord_controls": {
+      "name": "discord_controls",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "action": {
+          "name": "action",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "payload": {
+          "name": "payload",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "used": {
+          "name": "used",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        }
+      },
+      "indexes": {
+        "discord_controls_expiry_idx": {
+          "name": "discord_controls_expiry_idx",
+          "columns": [
+            "expires_at"
+          ],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "discord_controls_user_id_users_id_fk": {
+          "name": "discord_controls_user_id_users_id_fk",
+          "tableFrom": "discord_controls",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "discord_deliveries": {
+      "name": "discord_deliveries",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "image_hash": {
+          "name": "image_hash",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "status": {
+          "name": "status",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "message_url": {
+          "name": "message_url",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "discord_deliveries_user_id_users_id_fk": {
+          "name": "discord_deliveries_user_id_users_id_fk",
+          "tableFrom": "discord_deliveries",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "discord_receipts": {
+      "name": "discord_receipts",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "response": {
+          "name": "response",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "discord_receipts_expiry_idx": {
+          "name": "discord_receipts_expiry_idx",
+          "columns": [
+            "expires_at"
+          ],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "discord_receipts_user_id_users_id_fk": {
+          "name": "discord_receipts_user_id_users_id_fk",
+          "tableFrom": "discord_receipts",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "habit_calendar_settings": {
+      "name": "habit_calendar_settings",
+      "columns": {
+        "habit_id": {
+          "name": "habit_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "settings": {
+          "name": "settings",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "habit_calendar_settings_habit_id_habits_id_fk": {
+          "name": "habit_calendar_settings_habit_id_habits_id_fk",
+          "tableFrom": "habit_calendar_settings",
+          "tableTo": "habits",
+          "columnsFrom": [
+            "habit_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "habit_days": {
+      "name": "habit_days",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "integer",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "habit_id": {
+          "name": "habit_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "revision_id": {
+          "name": "revision_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "date": {
+          "name": "date",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "timezone": {
+          "name": "timezone",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "ends_at": {
+          "name": "ends_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "count_set": {
+          "name": "count_set",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "count": {
+          "name": "count",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        },
+        "done": {
+          "name": "done",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        }
+      },
+      "indexes": {
+        "habit_days_lookup_idx": {
+          "name": "habit_days_lookup_idx",
+          "columns": [
+            "habit_id",
+            "date",
+            "revision_id"
+          ],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "habit_days_habit_id_habits_id_fk": {
+          "name": "habit_days_habit_id_habits_id_fk",
+          "tableFrom": "habit_days",
+          "tableTo": "habits",
+          "columnsFrom": [
+            "habit_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        },
+        "habit_days_revision_id_habit_revisions_id_fk": {
+          "name": "habit_days_revision_id_habit_revisions_id_fk",
+          "tableFrom": "habit_days",
+          "tableTo": "habit_revisions",
+          "columnsFrom": [
+            "revision_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "habit_revisions": {
+      "name": "habit_revisions",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "integer",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "habit_id": {
+          "name": "habit_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "effective_date": {
+          "name": "effective_date",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "config": {
+          "name": "config",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "habit_revisions_date_idx": {
+          "name": "habit_revisions_date_idx",
+          "columns": [
+            "habit_id",
+            "effective_date",
+            "id"
+          ],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "habit_revisions_habit_id_habits_id_fk": {
+          "name": "habit_revisions_habit_id_habits_id_fk",
+          "tableFrom": "habit_revisions",
+          "tableTo": "habits",
+          "columnsFrom": [
+            "habit_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "habits": {
+      "name": "habits",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_date": {
+          "name": "created_date",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "materialized_through": {
+          "name": "materialized_through",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "calendar_revision": {
+          "name": "calendar_revision",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
+        }
+      },
+      "indexes": {
+        "habits_user_idx": {
+          "name": "habits_user_idx",
+          "columns": [
+            "user_id"
+          ],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "habits_user_id_users_id_fk": {
+          "name": "habits_user_id_users_id_fk",
+          "tableFrom": "habits",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "live_discord_cards": {
+      "name": "live_discord_cards",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "channel_id": {
+          "name": "channel_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "message_id": {
+          "name": "message_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "message_url": {
+          "name": "message_url",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "nonce": {
+          "name": "nonce",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "theme": {
+          "name": "theme",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "status": {
+          "name": "status",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "image_hash": {
+          "name": "image_hash",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "dirty": {
+          "name": "dirty",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": true
+        },
+        "error": {
+          "name": "error",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "retry_at": {
+          "name": "retry_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "live_discord_cards_user_id_users_id_fk": {
+          "name": "live_discord_cards_user_id_users_id_fk",
+          "tableFrom": "live_discord_cards",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "progress_events": {
+      "name": "progress_events",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "integer",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": true
+        },
+        "day_id": {
+          "name": "day_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "occurrence_id": {
+          "name": "occurrence_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "before": {
+          "name": "before",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "after": {
+          "name": "after",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "progress_events_day_idx": {
+          "name": "progress_events_day_idx",
+          "columns": [
+            "day_id"
+          ],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "progress_events_day_id_habit_days_id_fk": {
+          "name": "progress_events_day_id_habit_days_id_fk",
+          "tableFrom": "progress_events",
+          "tableTo": "habit_days",
+          "columnsFrom": [
+            "day_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "reminder_deliveries": {
+      "name": "reminder_deliveries",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "slot": {
+          "name": "slot",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'*'"
+        },
+        "date": {
+          "name": "date",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "status": {
+          "name": "status",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "retry_at": {
+          "name": "retry_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "reminder_deliveries_user_date_slot_idx": {
+          "name": "reminder_deliveries_user_date_slot_idx",
+          "columns": [
+            "user_id",
+            "date",
+            "slot"
+          ],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {
+        "reminder_deliveries_user_id_users_id_fk": {
+          "name": "reminder_deliveries_user_id_users_id_fk",
+          "tableFrom": "reminder_deliveries",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "reminder_settings": {
+      "name": "reminder_settings",
+      "columns": {
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "enabled": {
+          "name": "enabled",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "time": {
+          "name": "time",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'20:00'"
+        },
+        "reminders": {
+          "name": "reminders",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "quiet_start": {
+          "name": "quiet_start",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'22:00'"
+        },
+        "quiet_end": {
+          "name": "quiet_end",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'08:00'"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "reminder_settings_user_id_users_id_fk": {
+          "name": "reminder_settings_user_id_users_id_fk",
+          "tableFrom": "reminder_settings",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "reminder_worker_state": {
+      "name": "reminder_worker_state",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "blocked_until": {
+          "name": "blocked_until",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "sessions": {
+      "name": "sessions",
+      "columns": {
+        "token_hash": {
+          "name": "token_hash",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "sessions_user_id_idx": {
+          "name": "sessions_user_id_idx",
+          "columns": [
+            "user_id"
+          ],
+          "isUnique": false
+        },
+        "sessions_expires_at_idx": {
+          "name": "sessions_expires_at_idx",
+          "columns": [
+            "expires_at"
+          ],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "sessions_user_id_users_id_fk": {
+          "name": "sessions_user_id_users_id_fk",
+          "tableFrom": "sessions",
+          "tableTo": "users",
+          "columnsFrom": [
+            "user_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "sharing_limits": {
+      "name": "sharing_limits",
+      "columns": {
+        "key": {
+          "name": "key",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "started_at": {
+          "name": "started_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "count": {
+          "name": "count",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "task_occurrences": {
+      "name": "task_occurrences",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "day_id": {
+          "name": "day_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "task_id": {
+          "name": "task_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "done": {
+          "name": "done",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": false
+        },
+        "expired_at": {
+          "name": "expired_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "closed_at": {
+          "name": "closed_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "task_occurrences_day_idx": {
+          "name": "task_occurrences_day_idx",
+          "columns": [
+            "day_id"
+          ],
+          "isUnique": false
+        }
+      },
+      "foreignKeys": {
+        "task_occurrences_day_id_habit_days_id_fk": {
+          "name": "task_occurrences_day_id_habit_days_id_fk",
+          "tableFrom": "task_occurrences",
+          "tableTo": "habit_days",
+          "columnsFrom": [
+            "day_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
+          "onDelete": "no action",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    },
+    "users": {
+      "name": "users",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "discord_id": {
+          "name": "discord_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "username": {
+          "name": "username",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "global_name": {
+          "name": "global_name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "avatar_hash": {
+          "name": "avatar_hash",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false,
+          "autoincrement": false
+        },
+        "timezone": {
+          "name": "timezone",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false,
+          "default": "'UTC'"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true,
+          "autoincrement": false
+        }
+      },
+      "indexes": {
+        "users_discord_id_unique": {
+          "name": "users_discord_id_unique",
+          "columns": [
+            "discord_id"
+          ],
+          "isUnique": true
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
+    }
+  },
+  "views": {},
+  "enums": {},
+  "_meta": {
+    "schemas": {},
+    "tables": {},
+    "columns": {}
+  },
+  "internal": {
+    "indexes": {}
+  }
+}
diff --git a/drizzle/meta/_journal.json b/drizzle/meta/_journal.json
index 4dde595..97d62ed 100644
--- a/drizzle/meta/_journal.json
+++ b/drizzle/meta/_journal.json
@@ -92,6 +92,13 @@
       "when": 1788847978168,
       "tag": "0012_discord_commands",
       "breakpoints": true
+    },
+    {
+      "idx": 13,
+      "version": "6",
+      "when": 1788860000000,
+      "tag": "0013_habit_calendar_revision",
+      "breakpoints": true
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/src/db/schema.ts b/src/db/schema.ts
index 7e2cd37..04ba11c 100644
--- a/src/db/schema.ts
+++ b/src/db/schema.ts
@@ -33,6 +33,7 @@ export const discordDeliveries = sqliteTable("discord_deliveries", {
 // Revisions are append-only, including multiple edits on the same local date.
 export const habits = sqliteTable('habits', {
   id: text('id').primaryKey(), userId: text('user_id').notNull().references(() => users.id),
+  calendarRevision: integer('calendar_revision').notNull().default(0),
   createdDate: text('created_date').notNull(), materializedThrough: text('materialized_through'), createdAt: integer('created_at').notNull(),
 }, t => [index('habits_user_idx').on(t.userId)]);
 export const habitRevisions = sqliteTable('habit_revisions', {
diff --git a/src/habits/performance.test.ts b/src/habits/performance.test.ts
index e8979dd..c727950 100644
--- a/src/habits/performance.test.ts
+++ b/src/habits/performance.test.ts
@@ -21,3 +21,26 @@ test('single-day reads load only the selected latest snapshot and its tasks', as
     expect(logs.find(query => query.includes('task_occurrences'))).toContain('"habit_days"."date" >=');
   } finally { f.close(); }
 });
+
+test('calendar summaries omit editor payloads and mutation versions cover historical changes', async () => {
+  const f = fixture();
+  try {
+    const habit = await f.json('/habits', 'POST', { name: 'Tasks', method: 'tasks', tasks: [{name:'Read'}] }, 201);
+    const first = (await f.json('/today')).habits[0];
+    expect((await f.json('/today')).habits[0].calendarRevision).toBe(first.calendarRevision);
+    f.setTime('2026-09-05T12:00:00Z');
+    await f.json(`/habits/${habit.id}/days/2026-09-04/tasks/${first.tasks[0].taskId}`, 'PUT', {done:true});
+    const changed = (await f.json('/today')).habits[0].calendarRevision;
+    expect(changed).toBeGreaterThan(first.calendarRevision);
+    await f.json(`/habits/${habit.id}/calendar-settings`, 'PUT', {mainColor:'#123456'});
+    expect((await f.json('/today')).habits[0].calendarRevision).toBeGreaterThan(changed);
+    const url = `/habits/${habit.id}/calendar?from=2026-09-04&to=2026-09-05`;
+    const full = await f.json(url);
+    const compact = await f.json(url+'&compact=true');
+    const detail = full.days[0].habits[0];
+    const {tasks, requirements, ...summary} = detail;
+    expect(compact.days[0].habits[0]).toEqual(summary);
+    expect(compact.data).toEqual(full.data);
+    expect((await f.json(`/habits/${habit.id}/days/2026-09-04`)).tasks[0].done).toBe(true);
+  } finally { f.close(); }
+});
diff --git a/src/habits/routes.ts b/src/habits/routes.ts
index 61280a8..b8966d6 100644
--- a/src/habits/routes.ts
+++ b/src/habits/routes.ts
@@ -20,7 +20,7 @@ function date(c: Context<Env>) {
   return result.data;
 }
 function range(c: Context<Env>) {
-  const result = z.object({ from: dateSchema, to: dateSchema }).strict().safeParse(c.req.query());
+  const result = z.object({ from: dateSchema, to: dateSchema, compact: z.enum(['true', 'false']).optional() }).strict().safeParse(c.req.query());
   if (!result.success || result.data.from > result.data.to || dayNumber(result.data.to) - dayNumber(result.data.from) > 1829) throw new ApiError(422, 'Supply from and to dates in order, spanning at most 1830 days');
   return result.data;
 }
@@ -80,7 +80,7 @@ export function createHabitRoutes(db: AppDatabase, auth: ReturnType<typeof creat
   app.get('/habits/:id/calendar-settings', c => c.json(service(c).settings(id(c))));
   app.put('/habits/:id/calendar-settings', c => c.json(service(c).saveSettings(id(c), body(c, calendarSettingsSchema))));
   app.get('/habits/:id/calendar', c => {
-    const { from, to } = range(c); return c.json(service(c).calendar([id(c)], from, to, service(c).settings(id(c)), false));
+    const { from, to, compact } = range(c); return c.json(service(c).calendar([id(c)], from, to, service(c).settings(id(c)), false, compact === 'true'));
   });
   app.get('/today', c => {
     const s = service(c); const habits = s.list().map(h => s.day(h.id, s.today));
@@ -100,7 +100,7 @@ export function createHabitRoutes(db: AppDatabase, auth: ReturnType<typeof creat
   });
   app.delete('/charts/:id', c => { service(c).deleteChart(id(c)); return c.body(null, 204); });
   app.get('/charts/:id/calendar', c => {
-    const chart = service(c).chart(id(c)); const { from, to } = range(c); return c.json(service(c).calendar(chart.habitIds, from, to, chart.settings, true));
+    const chart = service(c).chart(id(c)); const { from, to, compact } = range(c); return c.json(service(c).calendar(chart.habitIds, from, to, chart.settings, true, compact === 'true'));
   });
   app.get('/charts/:id/days/:date', c => {
     const chart = service(c).chart(id(c)); const day = date(c); return c.json(service(c).calendar(chart.habitIds, day, day, chart.settings, true).days[0]);
diff --git a/src/habits/service.ts b/src/habits/service.ts
index 3b2911b..7b291bd 100644
--- a/src/habits/service.ts
+++ b/src/habits/service.ts
@@ -55,6 +55,10 @@ export class HabitService {
     this.recordsCache.delete(id); this.occurrencesCache.delete(id); this.countCache.delete(id);
     this.loadRevisions(id, from, to);
   }
+  private changed(id: string) {
+    this.db.update(habits).set({ calendarRevision: sql`${habits.calendarRevision} + 1` }).where(eq(habits.id, id)).run();
+    this.ownedCache.delete(id);
+  }
   current(id: string) {
     const habit = this.owned(id); const revision = this.revision(id)!;
     const config = revision.config;
@@ -62,7 +66,7 @@ export class HabitService {
       ? [{ code: 'no_tasks', taskId: null, message: 'Add a task to make this habit due.' }]
       : config.tasks.filter(task => !schedulesOverlap(config.schedule, task.schedule))
         .map(task => ({ code: 'task_never_due', taskId: task.id, message: `Task \"${task.name}\" never coincides with the habit schedule.` }));
-    return { id: habit.id, ...config, warnings, createdDate: habit.createdDate, createdAt: habit.createdAt, revisionId: revision.id, effectiveDate: revision.effectiveDate };
+    return { id: habit.id, calendarRevision: habit.calendarRevision, ...config, warnings, createdDate: habit.createdDate, createdAt: habit.createdAt, revisionId: revision.id, effectiveDate: revision.effectiveDate };
   }
   list(includeArchived = false) {
     return this.db.select().from(habits).where(eq(habits.userId, this.user.id)).orderBy(asc(habits.createdAt), asc(habits.id)).all()
@@ -130,6 +134,7 @@ export class HabitService {
     this.db.transaction(() => {
       this.db.insert(habitRevisions).values({ habitId: id, effectiveDate: this.today, config, createdAt: this.now }).run();
       this.materialize(this.owned(id));
+      this.changed(id);
     });
     return this.current(id);
   }
@@ -270,7 +275,7 @@ export class HabitService {
     const value = !due ? 0 : config!.method === 'count' ? counted?.value ?? 0 : config!.method === 'manual' ? Number(record?.done ?? false) : tasks.filter(t => t.done).length;
     const target = !config ? null : config.method === 'count' ? config.target : config.method === 'manual' ? 1 : tasks.length;
     const ratio = due ? Math.min(1, value / target!) : null;
-    return { date, habitId: id, name: config?.name ?? null, method: config?.method ?? null, revisionId: revision?.id ?? null,
+    return { date, habitId: id, calendarRevision: this.owned(id).calendarRevision, name: config?.name ?? null, method: config?.method ?? null, revisionId: revision?.id ?? null,
       timezone: record?.timezone ?? this.user.timezone, endsAt: record?.endsAt ?? null, due, future,
       status: future ? 'future' : !due ? 'not_due' : ratio === 1 ? 'complete' : value > 0 ? 'partial' : 'empty',
       value, target, carriedFrom: counted?.carriedFrom ?? null, loggedCount: record?.countSet ? record.count : null, unit: config?.method === 'count' ? config.unit : config?.method === 'tasks' ? 'tasks' : 'completion',
@@ -291,6 +296,7 @@ export class HabitService {
     this.db.transaction(() => {
       this.db.insert(progressEvents).values({ dayId: record.id, before: { count: detail.value, done: record.done, loggedCount: record.countSet ? record.count : null, carriedFrom: detail.carriedFrom }, after: input, createdAt: this.now }).run();
       this.db.update(habitDays).set('count' in input ? { ...input, countSet: true } : input).where(eq(habitDays.id, record.id)).run();
+      this.changed(id);
     });
     this.invalidate(id);
     return this.day(id, date);
@@ -302,6 +308,7 @@ export class HabitService {
     this.db.transaction(() => {
       this.db.insert(progressEvents).values({ dayId: record.id, occurrenceId: occurrence.id, before: { done: occurrence.done }, after: { done }, createdAt: this.now }).run();
       this.db.update(taskOccurrences).set({ done, updatedAt: this.now }).where(eq(taskOccurrences.id, occurrence.id)).run();
+      this.changed(id);
     });
     this.invalidate(id);
     return this.day(id, date);
@@ -325,6 +332,7 @@ export class HabitService {
   saveSettings(id: string, settings: CalendarSettings) {
     this.owned(id);
     this.db.insert(habitCalendarSettings).values({ habitId: id, settings }).onConflictDoUpdate({ target: habitCalendarSettings.habitId, set: { settings } }).run();
+    this.changed(id);
     return settings;
   }
   chart(id: string) {
@@ -341,7 +349,7 @@ export class HabitService {
     return this.chart(id);
   }
   deleteChart(id: string) { this.chart(id); this.db.delete(combinedCharts).where(eq(combinedCharts.id, id)).run(); }
-  calendar(ids: string[], from: string, to: string, settings: CalendarSettings, combined: boolean) {
+  calendar(ids: string[], from: string, to: string, settings: CalendarSettings, combined: boolean, compact = false) {
     ids.forEach(id => { this.owned(id); this.range(id, from, to); });
     const days = [];
     for (let date = from; date <= to; date = addDays(date, 1)) {
@@ -353,7 +361,10 @@ export class HabitService {
       const progress = shade(ratio, steps, settings, !combined && (settings.shadeCount === 'auto' || manual));
       const future = date > this.today;
       days.push({ date, due: due.length, completed, ratio, future, status: future ? 'future' : ratio === null ? 'not_due' : ratio === 1 ? 'complete' : ratio > 0 ? 'partial' : 'empty',
-        shadeCount: steps, ...progress, color: future ? settings.futureColor : progress.color, habits: details });
+        shadeCount: steps, ...progress, color: future ? settings.futureColor : progress.color, habits: details.map(detail => {
+          const { tasks, requirements, ...summary } = detail;
+          return { ...summary, tasks: compact ? undefined : tasks, requirements: compact ? undefined : requirements };
+        }) });
     }
     return { kind: combined ? 'combined' as const : 'individual' as const, from, to, today: this.today, timezone: this.user.timezone, settings, days,
       // Explicit colors and details are supplied for the client's Nivo colorScale/tooltip adapters.