Iii Sdk Reference

Covers package installation, worker initialization, function registration, and invocation patterns across Node.js, browser, Python, and Rust implementations of the iii SDK. Includes side-by-side API maps so you can see how `registerFunction` in TypeScript becomes `register_function` in Python and Rust, plus the important gotchas like keeping secrets server-side in browser workers and using `trigger_async` inside Python async handlers. The tables are genuinely helpful when you're switching languages mid-project or need to remember which helper package exports Logger. Pairs with separate skills for core primitives and error handling, so this stays focused on syntax and SDK-specific mechanics rather than architecture.

skills.sh installs: 4.7K
GitHub stars: 18.9K
last updated: Aug 21, 2026

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Install

$ npx -y skills add iii-hq/iii --skill iii-sdk-reference --agent claude-code

Installs into .claude/skills of the current project.

Files

SDK Reference

Use this skill for language-specific SDK details. Use iii-core-primitives for the common model and iii-error-handling for exception handling.

Install

# TypeScript / Node.js
npm install iii-sdk

# Browser apps
npm install iii-browser-sdk

# Python
pip install iii-sdk

# Rust
cargo add iii-sdk

# Go
go get github.com/iii-hq/iii/sdk/packages/go/iii

Choose the SDK

SDK	Package	Best for	Important caveat
Node.js	`iii-sdk`	Server-side TypeScript/JavaScript workers	Supports custom headers, Logger, OpenTelemetry, HTTP-invoked functions
Browser	`iii-browser-sdk`	Web apps and interactive UI callbacks	Connect through the `rbac-proxy` worker's public port, never the engine port; keep secrets server-side
Python	`iii-sdk`	Sync or async Python workers	Use `call_async` inside async handlers
Rust	`iii-sdk`	High-performance tokio workers	Handler error type should map into `iii_sdk::Error`
Go	`github.com/iii-hq/iii/sdk/packages/go/iii`	Go services	Handlers take `(ctx, json.RawMessage)`; pass the handler's `ctx` to `Call`