diff --git a/skill/reference/audit.md b/skill/reference/audit.md
index 011071717..10e74574d 100644
--- a/skill/reference/audit.md
+++ b/skill/reference/audit.md
@@ -26,7 +26,8 @@ Run comprehensive checks across 5 dimensions. Score each dimension 0-4 using the
 **Check for**:
 - **Layout thrashing**: Reading/writing layout properties in loops
 - **Expensive animations**: Casual layout-property animation, unbounded blur/filter/shadow effects, or effects that visibly drop frames
-- **Missing optimization**: Images without lazy loading, unoptimized assets, missing will-change
+- **Missing optimization**: Images without lazy loading, unoptimized assets
+- **will-change overuse**: `will-change` applied broadly or left on at rest (it is a targeted hint for known expensive animations, not a baseline requirement)
 - **Bundle size**: Unnecessary imports, unused dependencies
 - **Render performance**: Unnecessary re-renders, missing memoization
 
diff --git a/skill/reference/harden.md b/skill/reference/harden.md
index 2d2fd01a2..0154336fd 100644
--- a/skill/reference/harden.md
+++ b/skill/reference/harden.md
@@ -78,7 +78,7 @@ Systematically improve resilience:
 
 **Responsive text sizing**:
 - Use `clamp()` for fluid typography
-- Set minimum readable sizes (14px on mobile)
+- Set minimum readable sizes (16px body on mobile, the same floor the typography guidance sets; 14px only for genuinely secondary text. iOS Safari force-zooms focused inputs under 16px, which breaks form layouts)
 - Test text scaling (zoom to 200%)
 - Ensure containers expand with text
 
diff --git a/skill/reference/optimize.md b/skill/reference/optimize.md
index e7f08b16a..9c7bb144a 100644
--- a/skill/reference/optimize.md
+++ b/skill/reference/optimize.md
@@ -5,7 +5,7 @@ Performance is a feature. Identify the actual bottleneck for THIS interface, fix
 Understand current performance and identify problems:
 
 1. **Measure current state**:
-   - **Core Web Vitals**: LCP, FID/INP, CLS scores
+   - **Core Web Vitals**: LCP, INP, CLS scores
    - **Load time**: Time to interactive, first contentful paint
    - **Bundle size**: JavaScript, CSS, image sizes
    - **Runtime performance**: Frame rate, memory usage, CPU usage
@@ -106,7 +106,7 @@ elements.forEach((el, i) => {
 - Minimize DOM depth (flatter is faster)
 - Reduce DOM size (fewer elements)
 - Use `content-visibility: auto` for long lists
-- Virtual scrolling for very long lists (react-window, react-virtualized)
+- Virtual scrolling for very long lists (react-window, TanStack Virtual)
 
 **Reduce Paint & Composite**:
 - Use `transform` and `opacity` for reliable movement, but allow blur, filters, masks, clip paths, shadows, and color shifts when they create meaningful polish
@@ -196,7 +196,7 @@ const observer = new IntersectionObserver((entries) => {
 - Use CDN
 - Server-side rendering
 
-### First Input Delay (FID < 100ms) / INP (< 200ms)
+### Interaction to Next Paint (INP < 200ms)
 - Break up long tasks
 - Defer non-critical JavaScript
 - Use web workers for heavy computation
@@ -226,7 +226,7 @@ const observer = new IntersectionObserver((entries) => {
 - Performance monitoring (Sentry, DataDog, New Relic)
 
 **Key metrics**:
-- LCP, FID/INP, CLS (Core Web Vitals)
+- LCP, INP, CLS (Core Web Vitals; INP replaced FID in March 2024)
 - Time to Interactive (TTI)
 - First Contentful Paint (FCP)
 - Total Blocking Time (TBT)
diff --git a/skill/reference/overdrive.md b/skill/reference/overdrive.md
index 25585652c..bc4ffd79f 100644
--- a/skill/reference/overdrive.md
+++ b/skill/reference/overdrive.md
@@ -57,7 +57,7 @@ Organized by what you're trying to achieve, not by technology name.
 
 ### Render beyond CSS
 - **WebGL** (all browsers): shader effects, post-processing, particle systems. Libraries: Three.js, OGL (lightweight), regl. Use for effects CSS can't express.
-- **WebGPU** (Chrome/Edge; Safari partial; Firefox: flag only): next-gen GPU compute. More powerful than WebGL but limited browser support. Always fall back to WebGL2.
+- **WebGPU** (Chrome/Edge; Safari 26+; Firefox on Windows/macOS; flag only on Firefox Linux/Android): next-gen GPU compute, more powerful than WebGL. Always fall back to WebGL2.
 - **Canvas 2D / OffscreenCanvas**: custom rendering, pixel manipulation, or moving heavy rendering off the main thread entirely via Web Workers + OffscreenCanvas.
 - **SVG filter chains**: displacement maps, turbulence, morphology for organic distortion effects. CSS-animatable.