UiPath Coded Functions

Atomic, deterministic units of business logic — no LLM reasoning, no agent loop — written in Python or TypeScript/JavaScript and shipped as first-class UiPath artifacts. One uip function CLI drives both languages. A Coded Function takes typed input, executes deterministic code, and returns typed output; use one when generic activities don't cover the required logic (custom-auth API calls, domain rules, ERP queries via Integration Service, data transforms).

When to Use This Skill

• Scaffold, author, or modify a coded function in either language (uip function new <NAME> -l py|ts|js)
• Declare typed contracts — Pydantic Input/Output (Python) or defineSchema<T>() / JSON Schema literals (JS/TS)
• Test locally: uip function run (both languages), uip function serve + curl (JS/TS HTTP endpoints)
• Error handling: returned error fields (Python), FunctionError/status codes and job fault semantics (JS/TS)
• Call UiPath platform APIs from inside a function (Python SDK; @uipath/uipath-typescript with ctx tokens)
• Wire a Coded App frontend to a JS/TS function backend (tokens, CORS, timeout budget, local dev loop)
• Pack, publish, invoke in production; register in a solution; derive bindings.json resource bindings from SDK calls
• Debug deployed failures: cold-start hangs, errorCode 4801/4804/1623, missing tokens, entrypoint errors