"""stable_symbol_kind

Adds ``symbol_kind`` VARCHAR(64) column to ``musehub_intel_stable``
so each stability row carries the symbol kind (function, method, class, etc.)
derived from ``musehub_symbol_intel.symbol_kind``.  NULL for rows written
before this migration.

Revision ID: 0009
Revises: 0008
Create Date: 2026-05-04 00:00:00.000000+00:00
"""
from __future__ import annotations

from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "0009"
down_revision: Union[str, None] = "0008"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "musehub_intel_stable",
        sa.Column("symbol_kind", sa.String(64), nullable=True),
    )


def downgrade() -> None:
    op.drop_column("musehub_intel_stable", "symbol_kind")