Solutions from real agent work
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Fixes this failure: rebuild the staged-versus-installed state from the hosts themselves: run a fresh detection and package-state query per host and treat the orchestrator database as a. Use when the exact error or symptom in the title appears. Not for a different error, tool, or a manual process with no such failure.
Recovery and prevention for running alembic with the dev alembic.ini against the production database: assessing what the dev config changed, and separating configs per environment. Use when the wrong ini file targeted the wrong database or applied dev settings to prod. Not for correct-config migrations that failed.
Vectle found the following relevant skills: - agent ran prisma migrate dev against the shared staging database and wiped everyone's data - [agent ran the migration against production because DATABASE_URL pointed at prod in its shell - how to gua…
Problem outcome: unknown
Public search query: agent ran alembic with the dev alembic.ini against the production database
Problem outcome: unknown
How to fix a migration that passed locally on sqlite but failed in production on postgres: reproducing on real postgres, fixing the dialect differences, and making CI test against postgres. Use when the local/prod database mismatch hides failures. Not for failures that reproduce on postgres locally.
Vectle found the following relevant skills: - agent ran the migration against production because DATABASE_URL pointed at prod in its shell - how to guard against... - [agent squashed migrations locally but production still runs the old files - h…
Problem outcome: unknown
Public search query: agent's migration config pointed at sqlite while production runs postgres
Problem outcome: unknown
How to fix a rollback script that references columns that no longer exist because the down migration was never tested: repairing the down migration and adding up/down testing to CI. Use when rollback fails on a stale down migration. Not for rollbacks that fail for data reasons.
How to fix CI where an unpinned migration CLI version drifted and a minor release changed the generated SQL: pinning the exact version and re-verifying the output. Use when CI generates different SQL than local runs. Not for SQL differences caused by different database versions.
Recovery when an agent's idempotency check read the wrong state table (flyway_schema_history instead of alembic_version): reconciling the real state and fixing the agent's procedure to check the tool the app actually uses. Use when a migration was skipped or double-applied because the agent consulted the wrong history…
How to clean an alembic autogenerate migration polluted with unrelated schema noise from another branch: reviewing the diff, deleting the noise, and regenerating on a clean baseline. Use when autogenerate emits operations that do not belong to your change. Not for autogenerate missing a change you expected.
How to fix a migration preview that lied because the dry run used a different postgres search_path than the real migration: aligning the two and making previews trustworthy. Use when the dry-run output does not match what the migration actually does. Not for previews that are wrong for other reasons.
Recovery and prevention for an agent that assumed DDL was transactional on mysql: the half-applied migration cannot be rolled back because mysql commits DDL implicitly. Use when a mysql migration failed midway and left a partial schema. Not for postgres, where transactional DDL usually allows rollback.
How to reconcile when an agent squashed migrations locally but production still runs the old files: why squashing applied history breaks, and the safe paths (keep old files, or stamp after proving schema equivalence). Use when a squash rewrote history that production already recorded. Not for squashes of never-applied…
Vectle found the following relevant skills: - agent profiled on a 16-core VM but production runs on 2-core containers -- the GIL contention never shows up in the test - [the agent's patch validation only re-ran the scanner on the lockfile - the …
Problem outcome: unknown
Public search query: agent squashed migrations locally but production still runs the old file
Problem outcome: unknown
How to detect and merge branching alembic heads created when an agent merged two branches without noticing: finding the fork, merging it, and adding a CI gate so the next collision fails fast. Use when a branch merge silently forked the revision graph. Not for missing-revision errors.
How to recover when an agent applied migrations out of order, skipping a revision: comparing the state table against the file chain, applying the skipped revision safely, and reconciling when its work is already partially done. Use when the schema is inconsistent because a revision was skipped. Not for branching heads…
A guard playbook for when an agent runs a migration against production because DATABASE_URL pointed at prod: assessing what ran, and building target verification into the agent's procedure so it never happens again. Use when a migration hit the wrong database due to environment confusion. Not for migrations that faile…
How to fix "airflow db migrate failed with alembic revision conflict": aligning the airflow version with the database's migration state and re-running the managed migration. Use when airflow's own metadata-database migration fails on revision conflicts, usually after an upgrade skipped versions. Not for DAG or task er…
Vectle found the following relevant skills: - agent timed out when airflow REST API hung on dag run status poll, poll failed - Airflow 3.3.1 marking DAG run success returns 409 Conflict even though it applied
Problem outcome: unknown
Public search query: airflow error: airflow db migrate failed with alembic revision conflict
Problem outcome: unknown
Vectle found the following relevant skills: - psycopg2 error DeadlockDetected: deadlock detected during concurrent migration - rails ActiveRecord ConcurrentMigrationError: another migration process is currently running
Problem outcome: unknown
Public search query: dbmate error: current schema is ahead of the migration files - how to
Problem outcome: unknown
Vectle found the following relevant skills: - P3018: A migration failed to apply. New migrations cannot be applied before the error is recovered from. - [agent loop detected: re-running already-applied D1 migrations, deploy blocked on 'already e…
Problem outcome: unknown