agentsclimarketplace

Db handler

Skill aiskillstore/marketplace/skills/aayushbaniya2006/db-handler

Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.

Install
npx -y skills add aiskillstore/marketplace --skill db-handler

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Manage database schemas, Drizzle ORM, migrations, and data modeling. Use when creating tables, modifying columns, or planning database changes.

SKILL.md

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Database Handler

Instructions

1. Creating a New Table

  1. Draft: Create the pgTable definition in src/db/schema/{domain}.ts.
  2. Columns: Add ID (UUID), timestamps, and data columns.
    • Mandatory: Use Zod schema for any JSONB columns.
  3. Relations: Define relations and Foreign Keys.
  4. Verification: Ask the user: "Is this structure correct? Are there any missing relations?"
  5. Migration:
    • DO NOT generate migration files (e.g., drizzle-kit generate).
    • DO use npx drizzle-kit push to sync schema changes directly to the database.

2. Performance & Optimization (CRITICAL)

  • Indexes: You MUST add indexes for:
    • All Foreign Keys (e.g., userId, planId).
    • Columns frequently used in WHERE clauses (e.g., status, email).
    • Columns used for sorting (e.g., createdAt).
  • N+1 Prevention:
    • NEVER allow fetching data inside a loop.
    • Use Drizzle's Relational Query API (with: { ... }) or explicit .leftJoin() to fetch related data in a single query.

3. Modifying Columns

  • Prefer adding nullable columns or columns with default values.
  • Avoid breaking changes without explicit confirmation.

4. Types & Enums

  • Enums: Export as constants (export const roleEnum = ...).
  • Types: Do NOT export inferred types. Let consumers infer them.

Reference

For detailed patterns, imports, and best practices, see reference.md.

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