Individual skill

omh-relational-db

[omh] Database work on a relational store -- a slow query, an index to size, a migration on a big table, a lock taken during deploy, N+1 queries: plan it with the checks that prove it safe, and never call a migration ready without its lock behaviour and rollback. Use when the user says: relational-db, relational database, online migration, migration for a large table, lock-safe ddl, alter table, took a lock, table lock.

skills/omh-relational-db/SKILL.md

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Repository stars (not skill ratings): 5,309
Repository last updated: Nov 9, 2026
License: MIT

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# Relational Db

This is a Hermes-native `relational-db` workflow skill.

## Why This Exists

`relational-db` exists because the database work itself had no owner: `backend` owns `schema_migration_plan/v1` for a service change, and an index question, a lock taken during deploy, or an N+1 finding was answered by a data, deploy, or interview lane with no lock model at all.

## First Steps

- Ask for the engine, the version, and the table sizes before proposing any statement.
- For a migration, give every step its lock behaviour and its rollback before calling the plan ready.

## Do Not Use When