"""conversations.curator_summary — feeds curator output back to the chat model

Revision ID: 0049
Revises: 0048
Create Date: 2026-05-22

Phase 3 of the conversation+curator architecture (Fable #172). The
curator's final summary line (≤ 240 chars) is persisted here so the
NEXT chat turn can include it in the system prompt. This is the
feedback loop that closes the architecture — without it, the chat
model has no awareness of what the curator extracted, and conversations
risk circling back to topics already captured.

NULL means "no curator pass has produced a summary yet." The chat
pipeline reads this column when building the journal system prompt;
missing column = no injection, no failure.
"""
from alembic import op
import sqlalchemy as sa


revision = "0049"
down_revision = "0048"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.add_column(
        "conversations",
        sa.Column("curator_summary", sa.Text, nullable=True),
    )


def downgrade() -> None:
    op.drop_column("conversations", "curator_summary")