diff --git a/alembic/versions/135e79414fd0_add_inactivity_tables.py b/alembic/versions/135e79414fd0_add_inactivity_tables.py
new file mode 100644
index 0000000..e522bae
--- /dev/null
+++ b/alembic/versions/135e79414fd0_add_inactivity_tables.py
@@ -0,0 +1,68 @@
+"""add inactivity tables
+
+Revision ID: 135e79414fd0
+Revises: comparison_llm_cost
+Create Date: 2026-07-16 18:31:02.105929
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '135e79414fd0'
+down_revision: Union[str, Sequence[str], None] = 'comparison_llm_cost'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "inactivity_reset_log",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("user_id", sa.Integer(), nullable=False),
+        sa.Column("coin_balance_before", sa.Integer(), nullable=False),
+        sa.Column("cash_balance_cents_before", sa.Integer(), nullable=False),
+        sa.Column("invite_cash_balance_cents_before", sa.Integer(), nullable=False),
+        sa.Column("last_active_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("inactive_days", sa.Integer(), nullable=False),
+        sa.Column("reason", sa.String(length=32), nullable=False),
+        sa.Column("reset_at", sa.DateTime(timezone=True),
+                  server_default=sa.text("(CURRENT_TIMESTAMP)"), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    with op.batch_alter_table("inactivity_reset_log", schema=None) as batch_op:
+        batch_op.create_index(batch_op.f("ix_inactivity_reset_log_user_id"), ["user_id"], unique=False)
+        batch_op.create_index(batch_op.f("ix_inactivity_reset_log_reset_at"), ["reset_at"], unique=False)
+
+    op.create_table(
+        "inactivity_notification_log",
+        sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
+        sa.Column("user_id", sa.Integer(), nullable=False),
+        sa.Column("stage", sa.Integer(), nullable=False),
+        sa.Column("inactive_days", sa.Integer(), nullable=False),
+        sa.Column("coin_balance", sa.Integer(), nullable=False),
+        sa.Column("cash_balance_cents", sa.Integer(), nullable=False),
+        sa.Column("invite_cash_balance_cents", sa.Integer(), nullable=False),
+        sa.Column("channel", sa.String(length=16), nullable=False),
+        sa.Column("status", sa.String(length=16), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True),
+                  server_default=sa.text("(CURRENT_TIMESTAMP)"), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    with op.batch_alter_table("inactivity_notification_log", schema=None) as batch_op:
+        batch_op.create_index(batch_op.f("ix_inactivity_notification_log_user_id"), ["user_id"], unique=False)
+        batch_op.create_index(batch_op.f("ix_inactivity_notification_log_created_at"), ["created_at"], unique=False)
+
+
+def downgrade() -> None:
+    with op.batch_alter_table("inactivity_notification_log", schema=None) as batch_op:
+        batch_op.drop_index(batch_op.f("ix_inactivity_notification_log_created_at"))
+        batch_op.drop_index(batch_op.f("ix_inactivity_notification_log_user_id"))
+    op.drop_table("inactivity_notification_log")
+    with op.batch_alter_table("inactivity_reset_log", schema=None) as batch_op:
+        batch_op.drop_index(batch_op.f("ix_inactivity_reset_log_reset_at"))
+        batch_op.drop_index(batch_op.f("ix_inactivity_reset_log_user_id"))
+    op.drop_table("inactivity_reset_log")