Add Cursor Cloud dev environment setup (AGENTS.md)

[erop39]

Summary

Set up and verified the development environment for StroyKa, a single-file, client-side construction/roofing materials calculator (stroycalc.html, vanilla JS + Preact via CDN).

There are no dependencies to install, no build step, and no lint/test tooling. The app just needs to be served over HTTP with internet access for its CDN dependencies.

• Added AGENTS.md documenting how to run the app and the absence of build/lint/test tooling.
• Update script is a no-op verification (python3 --version) since there is nothing to install.

How to run

python3 -m http.server 8934 then open http://localhost:8934/stroycalc.html (port matches .claude/launch.json).

Verification (hello world task)

Loaded the app in Chrome, edited Wall 1 dimensions (6m × 2.7m → area 16.2 m²), and confirmed the Summary/Report tab computed material quantities (plaster kg, bags, primer, drainage items).

stroyka_calculator_demo.mp4

Initial load
Summary table with computed quantities

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