"""ml_settings.ccip_match_threshold — tunable CCIP character-match cut (#114)

The v1 matcher used a flat 0.75 cosine; live data showed that over-fires (a
high-reference character matched a scatter of images). 0.85 keeps the confident
single-character matches and drops the noise. Tunable from the GPU agent card.

Revision ID: 0063
Revises: 0062
Create Date: 2026-06-29
"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "0063"
down_revision: Union[str, None] = "0062"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "ml_settings",
        sa.Column(
            "ccip_match_threshold", sa.Float(), nullable=False,
            server_default="0.85",
        ),
    )


def downgrade() -> None:
    op.drop_column("ml_settings", "ccip_match_threshold")