Changelog — Faster site, stronger guards
Install this video
Adds the full composition, its remocn dependencies, and the prompt to your Remotion project via the shadcn registry.
$ pnpm dlx shadcn@latest add kapishdima/remocn-demo/perf-guardsRender it locally
Renders the MP4 on your machine with the Remotion CLI.
$ pnpm dlx remotion render perf-guards out/perf-guards.mp4 --scale=2 --crf=15 --x264-preset=slower --jpeg-quality=95 --gl=angleThe prompt
Reconstructed draftA reconstruction of the prompt this video was generated from.
The code
The exact source the AI wrote — the same files the install command puts in your project.
import React from "react";
import {
AbsoluteFill,
Easing,
Series,
interpolate,
spring,
useCurrentFrame,
useVideoConfig,
} from "remotion";
import {
TransitionSeries,
linearTiming,
type TransitionPresentation,
type TransitionPresentationComponentProps,
} from "@remotion/transitions";
import { loadFont as loadSans } from "@remotion/google-fonts/Manrope";
import { loadFont as loadMono } from "@remotion/google-fonts/GeistMono";
import { RemocnUIProvider } from "@/lib/remocn-ui";
import { syncSnap } from "@/components/remocn/sync-snap";
import { ShaderSimplexNoise } from "@/components/remocn/shader-simplex-noise";
import { ShaderSmokeRing } from "@/components/remocn/shader-smoke-ring";
import { KineticCenterBuild } from "@/components/remocn/kinetic-center-build";
import { SoftBlurIn } from "@/components/remocn/soft-blur-in";
import { ShortSlideRight } from "@/components/remocn/short-slide-right";
import { ScaleDownFade } from "@/components/remocn/scale-down-fade";
import { LineByLineSlide } from "@/components/remocn/line-by-line-slide";
// Manrope + Geist Mono, matching the shipped remocn.dev brand.
const { fontFamily: SANS_FAMILY } = loadSans("normal", {
subsets: ["latin"],
weights: ["400", "500", "600", "700"],
});
const { fontFamily: MONO_FAMILY } = loadMono("normal", {
subsets: ["latin"],
weights: ["400", "500"],
});
const SANS =
"var(--font-geist-sans), -apple-system, BlinkMacSystemFont, sans-serif";
const MONO = `${MONO_FAMILY}, ui-monospace, SFMono-Regular, monospace`;
const OBSIDIAN = "#141318";
const PANEL = "#1b1a21";
const INK = "#f2f2f2";
const MUTED = "rgba(242,242,242,0.62)";
const FAINT = "rgba(242,242,242,0.4)";
const HAIRLINE = "rgba(242,242,242,0.12)";
const LIME = "#C3E88D";
const clampOpts = {
extrapolateLeft: "clamp" as const,
extrapolateRight: "clamp" as const,
};
const Scrim: React.FC<{ strength?: number }> = ({ strength = 1 }) => (
<AbsoluteFill
style={{
background: `radial-gradient(120% 120% at 50% 42%, rgba(20,19,24,${
0.3 * strength
}) 0%, rgba(20,19,24,${0.82 * strength}) 100%)`,
}}
/>
);
// A small lime check that draws itself on.
const CheckMark: React.FC<{ size?: number; draw: number }> = ({
size = 16,
draw,
}) => (
<svg width={size} height={size} viewBox="0 0 24 24" fill="none">
<path
d="M20 6 9 17l-5-5"
stroke={LIME}
strokeWidth={2.6}
strokeLinecap="round"
strokeLinejoin="round"
pathLength={1}
strokeDasharray={1}
strokeDashoffset={1 - draw}
/>
</svg>
);
// ---------------------------------------------------------------------------
// Scene timings (frames @ 30fps). Transitions overlap.
// ---------------------------------------------------------------------------
const S_HOOK = 74;
const S_TITLE = 66;
const S_MOUNT = 66;
const S_WEIGHT = 108;
const S_DRIFT = 132;
const S_CI = 126;
const S_HARDEN = 96;
const S_VALUE = 100;
const S_OUTRO = 150;
const T_X = 14; // crossfade
const T_SNAP = 18; // sync-snap (the new registry transition)
const T_BLUR = 16; // blur crossfade
// ===========================================================================
// 1 — Hook. The key word "trust" lands last as the line assembles.
// ===========================================================================
const HookScene: React.FC = () => (
<AbsoluteFill>
<KineticCenterBuild
text="Copy-paste UI runs on trust"
fontSize={58}
fontWeight={400}
color={INK}
/>
</AbsoluteFill>
);
// ===========================================================================
// 2 — The title (the update's own words).
// ===========================================================================
const TitleScene: React.FC = () => (
<AbsoluteFill>
<SoftBlurIn
text="Faster site, stronger guards"
fontSize={58}
fontWeight={400}
color={INK}
/>
</AbsoluteFill>
);
// ===========================================================================
// 3 — Loads lighter (the lazy-mount feature).
// ===========================================================================
const MountScene: React.FC = () => (
<AbsoluteFill>
<ShortSlideRight
text="Players mount only when you scroll to them"
fontSize={42}
fontWeight={400}
color={INK}
/>
</AbsoluteFill>
);
// ===========================================================================
// 4 — The weight drop. The hero video's size counts DOWN and settles lighter.
// ===========================================================================
const WeightScene: React.FC = () => {
const frame = useCurrentFrame();
const appear = interpolate(frame, [6, 20], [0, 1], clampOpts);
const value = interpolate(frame, [16, 74], [18.5, 4.7], {
...clampOpts,
easing: Easing.out(Easing.cubic),
});
// The number eases down in scale as it drops — the weight coming off.
const scale = interpolate(frame, [16, 74], [1.08, 1], {
...clampOpts,
easing: Easing.out(Easing.cubic),
});
const caption = interpolate(frame, [78, 94], [0, 1], clampOpts);
return (
<AbsoluteFill
style={{
alignItems: "center",
justifyContent: "center",
flexDirection: "column",
gap: 18,
opacity: appear,
}}
>
<span style={{ fontFamily: SANS, fontSize: 20, fontWeight: 400, color: FAINT }}>
hero video
</span>
<div
style={{
display: "flex",
alignItems: "baseline",
gap: 12,
transform: `scale(${scale})`,
}}
>
<span
style={{
fontFamily: MONO,
fontSize: 104,
fontWeight: 500,
color: INK,
fontVariantNumeric: "tabular-nums",
lineHeight: 1,
}}
>
{value.toFixed(1)}
</span>
<span style={{ fontFamily: SANS, fontSize: 40, fontWeight: 400, color: MUTED }}>
MB
</span>
</div>
<span
style={{
fontFamily: SANS,
fontSize: 22,
fontWeight: 400,
color: MUTED,
opacity: caption,
}}
>
was 18.5 — nearly four times lighter
</span>
</AbsoluteFill>
);
};
// ===========================================================================
// 5 — The drift guard. Source and build shown side by side; a guard checks
// they match, every push.
// ===========================================================================
const GuardPanel: React.FC<{
label: string;
path: string;
enter: number;
fromX: number;
}> = ({ label, path, enter, fromX }) => (
<div
style={{
width: 300,
padding: "20px 22px",
borderRadius: 14,
border: `1px solid ${HAIRLINE}`,
background: PANEL,
boxShadow: "0 16px 40px rgba(0,0,0,0.32)",
opacity: enter,
transform: `translateX(${(1 - enter) * fromX}px)`,
}}
>
<div style={{ fontFamily: SANS, fontSize: 15, fontWeight: 400, color: FAINT }}>
{label}
</div>
<div
style={{
marginTop: 12,
fontFamily: MONO,
fontSize: 21,
fontWeight: 400,
color: INK,
}}
>
{path}
</div>
</div>
);
const DriftGuardScene: React.FC = () => {
const frame = useCurrentFrame();
const { fps } = useVideoConfig();
const enterL = interpolate(frame, [6, 26], [0, 1], {
...clampOpts,
easing: Easing.out(Easing.cubic),
});
const enterR = interpolate(frame, [12, 32], [0, 1], {
...clampOpts,
easing: Easing.out(Easing.cubic),
});
const badge = spring({ frame: frame - 40, fps, config: { damping: 15, stiffness: 100, mass: 0.8 } });
const checkDraw = interpolate(frame, [46, 62], [0, 1], clampOpts);
const caption = interpolate(frame, [70, 86], [0, 1], clampOpts);
return (
<AbsoluteFill
style={{ alignItems: "center", justifyContent: "center", flexDirection: "column", gap: 26 }}
>
<div style={{ display: "flex", alignItems: "center", gap: 22 }}>
<GuardPanel label="source" path="registry/blur-out-up" enter={enterL} fromX={-40} />
{/* The guard's verdict — a lime check that pops in and draws. */}
<div
style={{
display: "flex",
flexDirection: "column",
alignItems: "center",
gap: 8,
opacity: Math.min(1, badge),
transform: `scale(${interpolate(Math.min(1, badge), [0, 1], [0.6, 1])})`,
}}
>
<div
style={{
width: 46,
height: 46,
borderRadius: 999,
border: `1px solid ${LIME}`,
background: "rgba(195,232,141,0.12)",
display: "flex",
alignItems: "center",
justifyContent: "center",
}}
>
<CheckMark size={22} draw={checkDraw} />
</div>
<span style={{ fontFamily: SANS, fontSize: 15, fontWeight: 500, color: LIME }}>
match
</span>
</div>
<GuardPanel label="built" path="blur-out-up.tsx" enter={enterR} fromX={40} />
</div>
<span
style={{ fontFamily: SANS, fontSize: 22, fontWeight: 400, color: MUTED, opacity: caption }}
>
checked on every push
</span>
</AbsoluteFill>
);
};
// ===========================================================================
// 6 — Every push, all four. The CI checklist assembles, a check settling on
// each row in turn.
// ===========================================================================
const CI_ROWS = ["Lint", "Typecheck", "Tests", "Drift guard"];
const ROW_STEP = 16;
const CIScene: React.FC = () => {
const frame = useCurrentFrame();
const caption = interpolate(frame, [CI_ROWS.length * ROW_STEP + 6, CI_ROWS.length * ROW_STEP + 22], [0, 1], clampOpts);
return (
<AbsoluteFill
style={{ alignItems: "center", justifyContent: "center", flexDirection: "column", gap: 24 }}
>
<div style={{ display: "flex", flexDirection: "column", gap: 12, width: 300 }}>
{CI_ROWS.map((row, i) => {
const at = 8 + i * ROW_STEP;
const enter = interpolate(frame, [at, at + 12], [0, 1], {
...clampOpts,
easing: Easing.out(Easing.cubic),
});
const checkDraw = interpolate(frame, [at + 6, at + 18], [0, 1], clampOpts);
return (
<div
key={row}
style={{
display: "flex",
alignItems: "center",
gap: 14,
padding: "12px 16px",
borderRadius: 12,
border: `1px solid ${HAIRLINE}`,
background: PANEL,
opacity: enter,
transform: `translateY(${(1 - enter) * 12}px)`,
}}
>
<div
style={{
width: 24,
height: 24,
borderRadius: 7,
border: `1px solid ${checkDraw > 0.05 ? LIME : HAIRLINE}`,
background: checkDraw > 0.05 ? "rgba(195,232,141,0.12)" : "transparent",
display: "flex",
alignItems: "center",
justifyContent: "center",
flexShrink: 0,
}}
>
<CheckMark size={14} draw={checkDraw} />
</div>
<span style={{ fontFamily: SANS, fontSize: 22, fontWeight: 400, color: INK }}>
{row}
</span>
</div>
);
})}
</div>
<span
style={{ fontFamily: SANS, fontSize: 21, fontWeight: 400, color: MUTED, opacity: caption }}
>
on every push
</span>
</AbsoluteFill>
);
};
// ===========================================================================
// 7 — The render API, locked down. Three hardening items land and clear.
// ===========================================================================
const HARDENING = ["Trusted IPs", "Capped queues", "Allowlisted avatars"];
const HardeningScene: React.FC = () => (
<AbsoluteFill>
<Series>
{HARDENING.map((item) => (
<Series.Sequence key={item} durationInFrames={30}>
<ScaleDownFade text={item} fontSize={52} fontWeight={400} color={INK} speed={1.15} />
</Series.Sequence>
))}Showing the first 400 of 734 lines. View the full file on GitHub.