The format - prompts.ag

.ag files (or .ag.md during the transition) contain prompts written for AI agents. The format is simple:

Pseudo-XML tags for semantic structure (not strict XML)
Markdown content inside and between tags
No attributes on tags
Flexible whitespace—inline or block tags, as author intends

Example

quarterly-report.ag

You're a financial analyst at AcmeCorp. Generate a Q2 report.

<context>
AcmeCorp is a B2B SaaS company. Our investors value transparency.
</context>

<instructions>
1. Include sections: Revenue Growth, Profit Margins, Cash Flow
2. Highlight strengths and areas for improvement
</instructions>

Use this data:
<data>{{SPREADSHEET_DATA}}</data>

Design principles

The format preserves author intent. Tooling validates and lints but does not reformat. What you write is what the agent receives.

Markdown in XML tags

Why we don't benchmark

⌘I