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Standard Library (skill-core) ​

While OpenMandate ships with domain-specific packs like uk-law, all agents require a set of generic utilities to function properly.

The @openmandate/skill-core package acts as the "Standard Library" for OpenMandate. It provides safe, generic tools that any mandate can require and whitelist.

Available Tools ​

1. Date & Time (get-current-date-time) ​

LLMs do not inherently know what the current date or time is. If an agent needs to calculate a statutory deadline or answer temporal queries, it must fetch the current system time.

ID: get-current-date-timeInput: Optional timezone string (e.g. Europe/London). Output: ISO, UTC, local string, and unix millisecond timestamps.

2. Sandbox Math (evaluate-math) ​

LLMs are statistically prone to hallucinating arithmetic. For financial or legal calculations, this tool provides a safe JS execution sandbox locked strictly to mathematical expressions.

ID: evaluate-mathInput: A strict mathematical expression (e.g., 1000 * 5.5). Output: The evaluated number.

3. Web Fetcher (fetch-webpage) ​

A lightweight utility to grab the text content of any public URL, automatically stripping HTML tags, scripts, and styles. Useful for reading external references or news articles.

ID: fetch-webpageInput: A full HTTPS URL. Output: Truncated plain text content of the page.

How to use ​

Require the core skill pack in your mandate and whitelist the tools you want to expose to the agent:

yaml
metadata:
  skill_packs:
    - "uk-law"
    - "core"

capabilities:
  tools:
    - "get-current-date-time"
    - "evaluate-math"

In your application code, be sure to register it alongside your other skill packs:

typescript
import { SkillPackRegistry } from "@openmandate/core/skills/registry.js";
import { coreSkillPack } from "@openmandate/skill-core";

const registry = new SkillPackRegistry();
registry.register(coreSkillPack);
await registry.setupAll();