# Mission briefs

> Describe the outcome, context, constraints, and expected deliverable that define a Grain Mission.

- Canonical page: [/product/briefs](https://grain.sh/product/briefs)
- Agent-readable page: [/agents/product--briefs.md](https://grain.sh/agents/product--briefs.md)
- Section: Product

## What this page covers

- Outcome-first requests
- Context and attachments
- Constraints
- Acceptance criteria
- Planning

## About Grain

Grain is a multi-agent work platform. A person describes an outcome as a Mission, Grain coordinates the models, tools, files, repositories, and connected computers needed to do the work, and the result returns for review.

Start with [the complete agent-readable index](https://grain.sh/agents/index.md) or read [the full site corpus](https://grain.sh/llms-full.txt).