"""Add agent_kind column to conversation_metadata table

Revision ID: 009
Revises: 008
Create Date: 2026-04-27 00:00:00.000000
"""

from typing import Sequence

import sqlalchemy as sa
from alembic import op

revision: str = '009'
down_revision: str | None = '008'
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.add_column(
        'conversation_metadata', sa.Column('agent_kind', sa.String, nullable=True)
    )


def downgrade() -> None:
    op.drop_column('conversation_metadata', 'agent_kind')