Best AI Agent Skills for Database Engineering (2026)

Database work is one of the highest-leverage areas for SKILL.md skills. A bad migration can take down production. A poorly optimized query can slow an entire application. Skills that encode database best practices prevent these problems before they happen.

Schema design skills

The most valuable database skills handle schema design decisions: proper normalization levels, index selection, foreign key conventions, naming standards, and column type choices. Without a skill, agents tend to generate schemas that work but aren't optimized — missing indexes on frequently-queried columns, using VARCHAR(255) for everything, or creating unnecessary junction tables.

A good schema design skill produces schemas with appropriate indexes from the start, uses the right column types (TIMESTAMPTZ not TIMESTAMP, UUID not auto-increment for distributed systems), and follows naming conventions consistently across your project.

Migration skills

Migration skills are about safety. They ensure your agent generates migrations that are reversible, handle data transformations without downtime, add indexes concurrently (CREATE INDEX CONCURRENTLY in PostgreSQL), and include proper up/down methods. They prevent common mistakes like dropping columns without backing up data or adding NOT NULL constraints without default values.

For teams running frequent migrations, a migration skill pays for itself immediately. One prevented incident is worth more than the skill costs.

Query optimization skills

Query optimization skills teach your agent to write efficient SQL. They handle proper JOIN ordering, subquery vs CTE decisions, window function usage, and avoiding common anti-patterns like SELECT * in production code, N+1 queries through ORMs, and missing WHERE clauses on UPDATE/DELETE statements.

These skills are particularly useful when your agent generates database access code — they ensure the ORM calls translate to efficient queries, use eager loading where appropriate, and avoid the performance traps that are easy to miss in application code.

ORM-specific skills

Prisma skills handle schema definition, relation modeling, migration workflows, and type-safe query building. They ensure proper use of Prisma's unique features like relation fields, composite types, and middleware.

SQLAlchemy skills cover model definition patterns, session management, async support, and the relationship between the ORM layer and raw SQL for performance-critical queries.

Drizzle skills focus on the type-safe SQL builder patterns, schema definition, and migration generation that Drizzle's approach requires.

Database-specific skills

PostgreSQL skills cover PG-specific features: JSONB operations, full-text search with tsvector, row-level security policies, materialized views, and advisory locks.

SQLite skills handle the constraints and best practices specific to embedded databases: WAL mode, proper PRAGMA settings, and connection pooling in application contexts.

Where to find database skills

Browse database and data engineering skills on Agensi — the data engineering category includes skills for schema design, migrations, query optimization, and specific ORMs. All work across Claude Code, Codex CLI, Cursor, and other SKILL.md-compatible agents.