NousResearch/hermes-agent

guidance

Constrain LLM output with grammars; guarantee valid JSON.

18 installs 240K starsUpdated Sep 3, 2026License: MIT

Install

npx skills add NousResearch/hermes-agent@guidance

Runs in your terminal. Adds the skill globally for Claude Code, Cursor, Codex and others; add -g -y to skip prompts.

What it does

Guidance: Constrained LLM Generation When to Use This Skill Use Guidance when you need to: - Control LLM output syntax with regex or grammars - Guarantee valid JSON/XML/code generation - Reduce latency vs traditional prompting approaches - Enforce structured formats (dates, emails, IDs, etc.) - Build multi-step workflows with Pythonic control flow - Prevent invalid outputs through grammatical constraints GitHub Stars: 18,000+ From: Microsoft Research Installation Quick Start Basic Example: Structured Generation Chat format with a local model Constraint support requires local logit access.…

Excerpt from the skill's own SKILL.md. Read the full file on GitHub before installing: skills run with your agent's permissions.

View source on GitHub

Before you install

Skills are plain text instructions the agent follows, sometimes with scripts. Check the source, prefer repositories with many installs and stars, and read any script it ships.

Categories

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