bvandeusenandClaude Opus 5.5
8c9bb000fa
0121 keeps the ARM_BORN date beside the constant it justifies. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
59 lines
2.1 KiB
Python
59 lines
2.1 KiB
Python
"""retire the report_preference arm's rows
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Revision ID: 0121
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Revises: 0120
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Create Date: 2026-10-09
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The fixed-question arm that searched for completion-report preferences when a
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task closed is gone: the reply shapes and the preferences mounted beside them
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now arrive on the moments. Its rows go with it (there is no legacy to
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preserve), because each one would otherwise mean something
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different once the arm is no longer registered:
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- `retrieval_logs` / `retrieval_judgments` — a source missing from the
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registry reads as `unregistered_source`, whose advice is "add it to the
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registry": the opposite of what happened.
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- `rule_usage_events` — a source missing from `RANKED_SOURCES` reads as
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ambient, so its surfacings would silently move into the other column of
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every rule's pull-through.
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- `retrieval_tuning_events` — the tuning history of a surface that no longer
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exists.
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- `settings` — the arm's floor and budget keys, which nothing reads.
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COST IS BOUNDED BY AN INDEX, NOT BY THE TABLE. A migration runs at boot
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against the live tables, which CI never has. `retrieval_logs`
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and `retrieval_judgments` are indexed on `source`. `rule_usage_events` is not,
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so its delete is also bounded by `created_at` (indexed): no row of the arm
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predates `ARM_BORN`, and the scan covers weeks rather than the table's whole history.
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Not reversible: the arm is not coming back, so neither are its rows.
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"""
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from alembic import op
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revision = "0121"
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down_revision = "0120"
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branch_labels = None
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depends_on = None
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SOURCE = "report_preference"
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# A safe floor under the arm's first row (it shipped after 2026-09-14).
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ARM_BORN = "2026-09-01"
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def upgrade() -> None:
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op.execute(f"DELETE FROM retrieval_logs WHERE source = '{SOURCE}'")
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op.execute(f"DELETE FROM retrieval_judgments WHERE source = '{SOURCE}'")
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op.execute(
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f"DELETE FROM rule_usage_events WHERE created_at >= '{ARM_BORN}' "
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f"AND source = '{SOURCE}'"
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)
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op.execute(f"DELETE FROM retrieval_tuning_events WHERE surface = '{SOURCE}'")
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op.execute(
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"DELETE FROM settings WHERE key IN "
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"('kb_reportpref_threshold', 'kb_reportpref_top_k')"
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)
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def downgrade() -> None:
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pass
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