Functional Programming

Claude Code: /plugin marketplace add wshobson/agents → /plugin install functional-programming@claude-code-workflows

The marketplace entry mentions Elixir, but the plugin ships a Haskell agent as well, and the pair is the point: two different answers to the same reliability question. Elixir handles failure at runtime through supervision trees, GenServer boundaries and a let-it-crash stance that changes what defensive code you end up writing, with Dialyzer specs and ExUnit doctests next to Phoenix and Ecto. Haskell handles it before runtime, pushing invariants into GADTs, newtypes and phantom types so the illegal state does not compile, using STM and async for concurrency. Neither agent bundles skills or commands; the contribution is entirely at the prompt level.