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iii-core-primitives — Claude Code skill: what it does, how to install

Guides agents on iii engine primitives: functions, triggers, workers, and invocation modes across TypeScript, Python, and Rust.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add iii-hq/iii --skill iii-core-primitives -a claude-code
Open on GitHub

What iii-core-primitives does

This skill guides agents through building on the iii runtime. It explains how to register functions using identifiers like orders::validate, configure worker processes in Python or TypeScript, and select execution modes. Immediate calls run synchronously, while background tasks with retry policies rely on TriggerAction.Enqueue().

In engine version 0.25, built-in sources such as http or cron still require registerTrigger, because these providers have not moved to source functions yet. Because of that, each call logs an informational deprecation warning, though the binding works as expected. Local worker processes are declared using the iii.worker.yaml file.

What it helps with

  • register local and HTTP-backed functions in iii workers
  • configure async retries using queue-based invocation
  • bind HTTP routes and cron schedules to target handlers
  • query live engine workers and functions through discovery APIs

Example prompts for the agent

  • Register an orders::validate function with an HTTP POST trigger
  • Create a iii.worker.yaml manifest for a Python worker
  • Set up an asynchronous worker task using TriggerAction.Enqueue

How to install iii-core-primitives

1Skills CLI (Vercel)

npx skills add iii-hq/iii --skill iii-core-primitives -a claude-code

2Manually: put the files in place

~/.claude/skills/iii-core-primitives/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/iii-core-primitives/

From the same set4

The whole set →
iii-engine-config iii-hq Configures the iii engine via worker-compose.yaml or config.yaml. Sets up engine ports, observers, RBAC proxy, and configuration storage. Claude Code CX Codex Cursor +1 4,200installs iii-sdk-reference iii-hq Reference for iii SDK APIs across Node.js, Python, Rust, Go, and browser. Quick lookup of correct syntax for worker registration, functions, triggers, observers, and channels on each platform. Claude Code CX Codex Cursor +1 4,000installs iii-error-handling iii-hq Skill teaches agents to read iii engine and SDK error codes, tell network failures from access denials, know when it is safe to retry. Use it when calling remote functions from Node, Python, Rust, or browser code. Claude Code CX Codex Cursor +1 4,000installs

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Questions about iii-core-primitives

How to install iii-core-primitives in Claude Code?

Run npx skills add iii-hq/iii --skill iii-core-primitives -a claude-code in your terminal.

What does the iii-core-primitives skill do?

It teaches the agent how to wire functions, triggers, and workers in the iii runtime. It covers sync and queued execution, namespace resolution, and engine discovery calls.

Why does version 0.25 still require registerTrigger for cron and HTTP?

Built-in event providers have not fully migrated to observable source functions yet. Calling registerTrigger logs a single deprecation warning per process, but execution continues normally.

See also

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