---
name: library-development
slug: libdev
description: Lifecycle for libraries, SDKs, and CLI tools
stages: [inception, development, security, release]
category: engineering
default_model: sonnet
---

# Library Development

Lifecycle for libraries, SDKs, and CLI tools. Differs from application
development: no product or design phases — inception directly covers discovery
and API surface (semver policy, public contract, extension points), development
builds against that contract, and release publishes rather than deploys.
