Individual skill

omh-backend

[omh] Designing an API, server, or data-layer change: prepare server, API, and data-layer contracts — auth boundary, error paths, response shape, and schema/migration discipline — before implementation. Use when the user says: backend, back-end, back end, backend skill, server side, server-side, api design, api contract.

skills/omh-backend/SKILL.md

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Last checked: Nov 9, 2026

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Repository stars (not skill ratings): 5,357
Repository last updated: Nov 10, 2026
License: MIT

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SKILL.mdcore · 12,880 bytes
SKILL.mdcore · 12,880 bytes
references/consumer-impact.mddoc · 3,879 bytes
references/contract-tests.mddoc · 4,553 bytes
references/inbound-and-async.mddoc · 5,790 bytes
references/schema-migration.mddoc · 3,299 bytes
references/service-contract.mddoc · 14,537 bytes

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# Backend

This is a Hermes-native `backend` workflow skill.

## Why This Exists

`backend` gives OMH a first-class server-side workflow so Hermes can prepare auth boundaries, error paths, response shapes, and migration order without becoming the hidden runtime that executes them.

## Do Not Use When

- The work is the database itself -- a slow query and the index that fixes it, DDL that locks a live table, N+1 queries, or when to partition or shard; use `omh-relational-db`, which owns the lock behaviour and rollback of each statement.
- The request is about web UI, layout, or a design system; use `omh-frontend`.
- The request is a security posture or threat review rather than a service design; use `omh-security-safety-review`.
- The request is to run or judge the verification of an already-built service; use `omh-verification-gate`.