Database Schema Guardian

    1

    Prevents catastrophic data loss by enforcing reversible migrations and blocking destructive SQL commands.

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    Works with the AI tools you already use

    Claude CodeClaude CodeCursorCursorCodex CLICodex CLIGitHub CopilotGitHub CopilotGemini CLIGemini CLI+20 more

    Database Schema Guardian

    Example session with this skill installed

    Add a bio column to the users table and a tags column to the posts table. Use Prisma.

    • Read your context and instructions
    • Compiled the database schema guardian

    I have generated the reversible Prisma migration for the requested schema changes. I checked the dependencies and confirmed that adding these optional columns will not impact existing foreign key constraints in the users or posts tables.

    Prisma Migration: add_user_bio_and_post_tags

    // UP: Add optional bio to User and tags to Post
// File: prisma/migrations/20231027_add_bio_and_tags/migration.sql

ALTER TABLE "users" ADD COLUMN "bio" TEXT;
ALTER TABLE "posts" ADD COLUMN "tags" TEXT[] DEFAULT ARRAY[]::TEXT[];

// DOWN: Rollback changes
// File: prisma/migrations/20231027_add_bio_and_tags/rollback.sql

ALTER TABLE "users" DROP COLUMN "bio";
ALTER TABLE "posts" DROP COLUMN "tags";

    [Schema Safety Check]

    • No destructive commands used
    • Reversible migration (UP/DOWN) provided
    • Foreign key dependencies verified
    • Dry-run query provided (N/A - no data movement)

    Next steps

    1. Run npx prisma migrate dev --name add_user_bio_and_post_tags to apply the changes to your local environment.
    2. Update your User and Post TypeScript interfaces to reflect the new optional fields.
    3. Verify that the UI forms for user profiles include the new bio text area.

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

    What you get

    Generate reversible UP/DOWN migration scripts for schema changes.Prevent accidental DROP or TRUNCATE commands during development.Identify foreign key conflicts before executing migrations.Verify data transformation logic with mandatory dry-run SELECT queries.

    About this skill

    The problem

    AI agents often suggest destructive SQL commands or direct schema modifications that lead to data loss and broken foreign key relationships. Developers cannot trust automated tools to handle migrations without risking the integrity of production-like environments.

    What it does

    • Enforces a strict ban on DROP and TRUNCATE commands without explicit user override.
    • Generates mandatory reversible migration scripts containing both UP and DOWN functions.
    • Analyzes schema dependencies to identify potential foreign key breaks before they happen.
    • Requires dry-run SELECT queries for all complex data transformations to verify accuracy.

    Frameworks & tools

    Supports SQL (PostgreSQL, MySQL, SQLite) and popular ORMs including Prisma, Drizzle, TypeORM, and Django Migrations.

    Why this beats prompting it yourself

    Generic prompts often miss the rollback step or ignore the downstream impact on foreign keys. This skill builds a safety rail into the agent's logic, ensuring every change is reversible and verified by default.

    Use cases

    • Adding new columns to high-traffic production tables safely.
    • Renaming legacy database fields using multi-step migration patterns.
    • Refactoring database relationships without orphaned records.
    • Scaffolding initial schema files for new feature branches.

    Known limitations

    Requires the user to manually type "I confirm destructive action" to bypass safety locks for intentional deletions.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
    1. 1

      Download the ZIP

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    2. 2

      Unzip into your skills folder

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    3. 3

      Ask your agent to use it

      Restart the agent if it was already running. It picks the skill up automatically - no config needed.

    Skills folder by agent

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    Recently published to Agensi

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    Trust & safety

    Security scanned

    Verified clean 20 days ago

    • Passed all security checks, Safe to install

    Listed20 days ago

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