Individual skill
build-backend
Build or modify backend APIs, services, jobs, persistence, and integrations while preserving contracts, authorization, data integrity, and failure behavior. Use for server-side features, database changes, background processing, backend defects, and service refactors; do not use for frontend-only or infrastructure-only work.
plugins/Phelan164/codex-howto/skills/build-backend/SKILL.md
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SKILL.mdcore · 1,643 bytesagents/openai.yamlasset · 211 bytesreferences/contracts-and-data.mddoc · 1,699 bytes
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# Build Backend
## Domain contract
- Trace changed behavior from input through validation, authorization, domain
logic, persistence, side effects, and response mapping.
- Preserve published contracts unless the request explicitly changes them.
- Enforce authorization at a trustworthy server-side boundary.
- Validate untrusted input before domain or persistence operations.
- Keep multi-write operations atomic where partial state would violate invariants.
- Design external calls for timeouts, retries, idempotency, and duplicate delivery where applicable.
- Do not query or mutate production data without explicit authorization.
- Do not fabricate migration, framework, or API behavior; verify version-sensitive details.
- Avoid broad service abstractions that are used once.