Add AGENTS.md and CLAUDE.md

[austin-denoble]

Problem

Missing agentic context in this repo.

Solution

Add AGENTS.md and CLAUDE.md, fill in basic repo information in AGENTS.md, redirect to AGENTS.md in CLAUDE.md.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Infrastructure change (CI configs, etc)
• Non-code change (docs, etc)
• None of the above: (explain here)

Test Plan

N/A

---

Note

Low Risk
Documentation-only changes plus a new gitignored scratch/ directory; no runtime behavior or shipped artifacts are affected.

Overview
Adds AGENTS.md, a concise guide for AI agents/assistants with repo entry points, command architecture, credential conventions, and build/test workflows, and adds CLAUDE.md to redirect to it.

Updates .gitignore to ignore an agent-specific scratch/ workspace directory.

^{Reviewed by Cursor Bugbot for commit fc0acd0. Bugbot is set up for automated code reviews on this repo. Configure here.}