NASA Power-of-10 — Web Edition (W1–W10)

Ten rules for safety-critical web development. Derived from audit of paper/ and docs/ sites.

Rule	Summary
W1	No JS-gated visibility. CSS content readable without JS. JS enhances via class toggle.
W2	No static imports for optional deps. Use dynamic `import()` in `try/catch`.
W3	Print must override every dark-theme color. WCAG AA (4.5:1) against white.
W4	Negative margins must match parent padding at exact breakpoint.
W5	Every `overflow: auto` must declare scrollbar policy (`scrollbar-width` + `::-webkit-scrollbar`).
W6	Every template variable escaped via `escape_html()` at interpolation site.
W7	Every `@media` breakpoint boundary-tested (±1px). Flex: `flex-wrap`. Grid: `auto-fill/minmax()`.
W8	No dead selectors, no orphaned JS. Zero-debt applies to web code.
W9	Content readable without JS. `<noscript>` for JS-required widgets.
W10	Every `z-index` scoped inside explicit stacking context (`isolation: isolate`).

Compliance Record (2026-03-14)

All 10 rules: PASS. See AGENT.md history for per-rule evidence.