Night Market Skill — ported from claude-night-market/archetypes. For the full experience with agents, hooks, and commands, install the Claude Code plugin.

The Functional Core, Imperative Shell Paradigm

When To Use

• Separating pure business logic from side effects
• Improving testability through immutable domain models

When NOT To Use

• Performance-critical hot paths where immutability overhead matters
• Purely imperative codebases with no plans to adopt functional patterns