Iii Effect System

A typed effect system for building composable, traceable functional pipelines in the style of Effect-TS. Each effect is a registered function with a single responsibility that chains to others via a trigger mechanism, with the entire pipeline traced through OpenTelemetry. HTTP triggers start the chain, errors stop propagation naturally, and you get end-to-end observability out of the box. This is worth looking at if you're building workflows that need proper error handling and tracing without wrestling with promise chains or hand-rolling instrumentation. The 17.5K stars suggest a solid community, though the terse documentation means you'll need to read the code to understand how effects compose in practice.

Install to Claude Code

npx -y skills add iii-hq/iii --skill iii-effect-system --agent claude-code