init commit

AGENTS.md

@@ -0,0 +1,20 @@
+# AGENTS.md — secure_student_loan
+
+## Important: Agents cannot run/view this project
+**Testing**: User must open `index.html` in browser. For debugging, add `console.log()` statements and ask user for console output.
+
+## Commands
+- **Run tests**: `node calculations.test.js` (custom assert functions)
+- **Single test**: Comment out other tests in file, then run
+- **Lint**: None (maintain consistency manually)
+
+## Code Style
+- **No package manager**: CDN-only (Tailwind, Alpine.js v3, ApexCharts)
+- **HTML**: 4-space indent, semantic tags, ARIA labels, mobile-first
+- **CSS**: Tailwind utilities only; responsive: `md:` `lg:` `xl:`
+- **JS**: ES6, Alpine reactivity (`x-data`, `x-model.number`, `x-show`)
+- **Imports**: CDN scripts with `defer` before `</body>`
+- **Naming**: kebab-case for x-data; camelCase for JS functions
+- **Testing**: assert/assertClose functions; test edge cases
+- **Structure**: index.html (UI), calculations.js (logic), calculations.test.js
+- **Constants**: 7% investment return, 5% loan interest hardcoded