Add AGENTS.md with Cursor Cloud development instructions

[kiyarose]

Summary

Adds AGENTS.md with development environment instructions for Cursor Cloud agents working on the cross-platform Tauri app.

What's included

• Project overview (macOS native vs cross-platform Tauri)
• Commands for building, running, linting, and formatting the cross-platform app
• Key caveats for Ubuntu 24.04 (webkit2gtk-4.0 unavailability workaround, Rust toolchain version requirements)
• Notes on testing limitations (no automated tests for cross-platform app)

Demo

pinstick_dev_demo.mp4

PinStick app running in dev mode with note text and pinned state

_{To show artifacts inline, enable in settings.}

[deepsource-io]

DeepSource Code Review

We reviewed changes in 777cd26...6de26b6 on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

See full review on DeepSource ↗

PR Report Card

Overall Grade

Security Reliability Complexity Hygiene

Code Review Summary

Analyzer	Status	Updated (UTC)	Details
Rust		May 19, 2026 9:27p.m.	Review ↗

---

Important

AI Review is run only on demand for your team. We're only showing results of static analysis review right now. To trigger AI Review, comment @deepsourcebot review on this thread.