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    Migration Auditor

    1

    Get a database migration risk report, safer deployment recommendations, and a production-readiness checklist.

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    Migration Auditor

    Migration Auditor

    Example session with this skill installed

    Review for production: PostgreSQL 16, orders has 8 million rows and steady writes. SQL: ALTER TABLE orders DROP COLUMN legacy_status; Backup and app compatibility details aren't available.

    • Read your context and instructions
    • Compiled the migration auditor

    Reviewed the supplied PostgreSQL 16 migration. It removes stored data and needs an exclusive table lock; recovery and application compatibility are unverified.

    Migration Risk Report

    Verdict: High Risk / Do Not Deploy as supplied.

    AreaFindingImpact
    Change inventoryDrops orders.legacy_status.Destructive schema change.
    LockingRequires ACCESS EXCLUSIVE.Blocks reads and writes while held; waiting for the lock may disrupt traffic.
    Data lossRemoves all values in the column.Adding the column back after commit will not restore them.
    CompatibilityApplication references and dependencies are unknown.Queries may fail; dependent objects may prevent the drop.
    IndexesIndexes involving the column are not supplied.Check what will be removed and whether queries still depend on it.
    RecoveryNo recovery evidence supplied.Post-commit data recovery is unproven.

    In PostgreSQL 16, dropping this column does not itself rewrite all 8 million rows. Lock acquisition remains a concern.

    Safer Plan and Verification

    • Confirm deployed application versions no longer read or write the column.
    • Inventory dependencies and verify a recoverable copy of required data.
    • Check long-running transactions before deployment. Afterward, verify the schema and run order read/write smoke tests.

    Next steps

    • Supply application references and the table's constraints and indexes.
    • Confirm backup restoration or another data recovery path.
    • Define acceptable lock waits and deployment stop criteria.

    Connects securely to your tools. The creator never sees your data.

    About this skill

    A database change can block customer requests, erase data, or break the application during deployment. Get an evidence-based review of your migration, with clear risks, safer alternatives, and checks to run before release.

    What it does

    • Finds downtime risks: Reviews schema changes, large updates, and index operations that could block reads or writes.
    • Flags data loss: Identifies destructive changes, unsafe conversions, and missing recovery plans.
    • Checks compatibility: Reviews constraints and whether application versions can work with the changed schema.
    • Reviews indexes: Flags creation hazards, duplication, and questions that need query or workload evidence.
    • Plans safer deployment: Provides staged alternatives, verification checks, and a production-readiness verdict.

    How it works

    1. Share your migration SQL or ORM migration code.
    2. Add the database version, schema, table sizes, traffic patterns, and deployment details you have.
    3. Receive a risk review that separates confirmed findings from concerns needing more evidence.
    4. Use the recommendations and checklist to revise and verify the migration.

    Works with

    PostgreSQL, MySQL, and SQLite migrations, including SQL and supplied ORM migration code. Database-specific advice depends on the version and context provided.

    Why use this skill

    Bring locking, recovery, and application compatibility into one review instead of checking them separately. Each serious finding explains the likely consequence, helping your team prioritize changes before deployment.

    Use cases

    • Review a column removal before a release.
    • Assess index creation on a busy table.
    • Plan a staged schema change across application versions.
    • Check recovery gaps in a destructive migration.

    Known limitations

    This reviews supplied material, not live production behavior. Missing version, workload, or schema details can leave findings unresolved.

    Reviews supplied scripts and context, not live production behavior. Version-specific advice needs the database version; missing schema or workload details can limit conclusions.

    How to use

    1. 1

      Connect your agent to the Agensi MCP

      Copy the prompt and paste it into Claude, ChatGPT, Cursor or any agent that supports MCP. It sets up the connection for you. Manual setup

    2. 2

      Sign in to Agensi

      Your agent shows a sign-in link. Sign in and click Allow.

    3. 3

      Ask for what you need

      Your agent loads this skill and uses it on your task. It always asks before any payment.

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    Listed1 month ago

    What's inside

    Frequently Asked Questions

    The auditor identifies operations that lock tables (like adding columns to large tables), flags potential data loss, checks for application compatibility issues, and provides staged rollout strategies to ensure zero-downtime deployments.

    It supports PostgreSQL, MySQL, and SQLite. You can provide raw SQL scripts or code from popular ORMs, though providing your specific database version and table sizes will result in more accurate locking analysis.

    No live connection is required; the skill analyzes the migration code and schema metadata you provide. This ensures your production data remains secure and isolated while still receiving an evidence-based risk assessment.

    You receive the core Migration Auditor logic, a structured reporting template, and a production-readiness checklist. This includes the ability to analyze schema changes, index operations, and data conversion safety.

    The auditor provides a 'Production-Readiness Verdict' that categorizes findings into confirmed risks and concerns requiring more evidence. If a high-risk operation is found, it suggests safer, staged alternatives (like the 'expand and contract' pattern).

    New in Data & Databases