Change Summary

Each metric as a sentence ("Up 7.4% to $48,210", "Steady at 1,284") with a small tinted arrow and an optional trend line. Rates can report the change in points, new metrics say so, and a row can become a button to drill in.

Data & feedback ProLifetime access307 lines · one file

The decision inside it

Good is decided per metric

Churn going up is red and revenue going up is green, so the colour answers "is this good news?". Rows sort by the size of the change, so a 30% drop in sign-ups is never hidden under metrics that moved a rounding error.

When to use it

Use Change Summary for what moved since last time, as sentences: each metric decides whether up is good (goodWhen), rows sort by the size of the change, and small moves read as steady. For KPI tiles with charts use the chart components.

Installation

How you get it

Paste this into Claude Code, Cursor, Codex or any coding agent. It installs the file and uses it as it is, instead of writing a new one.

Use Layro's Change Summary for this.
Install it: npx shadcn@latest add @layro/change-summary
(the @layro registry is set up in components.json, with LAYRO_KEY in .env.local)
Import it from @/components/ui/change-summary.
Do not rewrite or restyle it. Pass my data through its props
and keep its built-in states.

For the full brief with every prop and the mistakes assistants usually make, use Copy prompt above. Pro components install through the @layro registry with your CLI token: see the Namespaced tab.

Usage

components/weekly-changes.tsx

import { ChangeSummary, type ChangeMetric } from "@/components/ui/change-summary";

const usd = (v: number) => v.toLocaleString("en-US", { style: "currency", currency: "USD", maximumFractionDigits: 0 });

const metrics: ChangeMetric[] = [
  { id: "mrr", label: "MRR", value: 48210, previous: 44900, format: usd },
  { id: "churn", label: "Churn", value: 2.6, previous: 2.1, goodWhen: "down", delta: "absolute", format: (v) => `${v}%`, formatDelta: (d) => `${d.toFixed(1)} pts` },
  { id: "signups", label: "Sign-ups", value: 1284, previous: 1281 },
];

export function WeeklyChanges() {
  return <ChangeSummary since="Last week" metrics={metrics} />;
}

API reference

“Copy prompt” above puts a full brief on your clipboard — install command, dependencies, props, and the mistakes an assistant usually makes with this component.

Props

Read from the component’s own TypeScript interface when the site is built, so this table cannot drift from the file you install.

Prop	Type	Notes
`metrics`required	`ChangeMetric[]`	—
`since`	`string`	The comparison point: "Last week", "Last visit".
`sinceDetail`	`string`	A longer note under the title: "Tuesday 14 Oct, 3 days ago".
`title`	`React.ReactNode`	—
`sort`	`"change" \| "given"`	"change" (default) sorts the biggest movement first; "given" keeps your order.
`flatBelow`	`number`	A relative change below this counts as steady. Default 0.005 (0.5%).
`onSelect`	`(id: string) => void`	Makes each row a button.

Dependencies

npm packages

clsxframer-motionlucide-reacttailwind-merge

Layro foundations, installed alongside it

layro-theme

States

All of them are drawn by the component. None is left for you to design.

Mixed
Good news
Bad news
Steady
New metric
Nothing moved

Accessibility

Keyboard reachable throughout, in visual order
Focus trapped in overlays, Escape closes them
Focus returns to whatever opened it
Live regions announce what changed, not that something did
Honours prefers-reduced-motion

Responsive behavior

Sizes to its container, not the viewport
Usable from 320px up
Pointer-based interaction, so trackpad and touch both work
No hover-only affordances

Used in a screenAll screens

ScreenPro

Analytics

A revenue dashboard: four key figures, revenue over time, channels, top products and what moved.

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Inside