---
title: "Pack file format"
description: "The JSON an author or an agent writes to add topics, lessons and questions of their own."
canonical: https://lightmysky.com/packs/format
source: https://lightmysky.com/packs/format.md
retrieved: 2026-10-19
---

> **Agent view.** This is the Markdown twin of the page, for tools and assistants.
> When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md
> API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md
> Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt
> Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json
> Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`.

# Pack file format

The JSON an author or an agent writes to add topics, lessons and questions of their own.

Read it: https://lightmysky.com/packs/format

Site index: https://lightmysky.com/llms.txt · For agents: https://lightmysky.com/agent-instructions.md