# SLO Fleet Health block

> SLO health KPI strip with lollipop minis for budget left, hourly burn peaks and budget events

4 KPI tiles for an SLO fleet: objectives meeting target, median budget left, hourly burn peaks and budget events, each with a lollipop or bead mini. Hover turns the footer into a column readout. ReUI Frame, Badge, IconTile, Recharts. Error budgets.

- Type: Pro block
- Category: [Sparkline](https://reui.io/blocks/chart/sparkline.md)
- Page: https://reui.io/blocks/chart/sparkline/chart-41
- MCP: `get_block("chart-41")`
- Built with: Badge, Frame, Icon Tile
- Installs with a ReUI Pro or Ultimate license; setup: https://reui.io/docs/license-setup

## Best for

An SLO fleet strip of 4 tiles with lollipop and bead minis whose footer band turns into a column readout on hover or arrow keys

## Agent notes

- Replace `SLOS` with real SLI counts: `generateSeries` invents each record's `days`, `hourly` and `minutes` from a hash of its `id`
- `ALERT_RULES` in slo-math.ts holds the 14.4, 6 and 1 burn factors behind the page line and the Paging and Ticket badges
- Tiles link nowhere and run no actions; pointing a column only swaps the `SubjectBand` footer for that column's readout

## When not to use

- Each objective on its own row with a budget pin, a 28 day trend and a create form: use [SLO Budgets](https://reui.io/blocks/chart/sparkline/chart-44.md) (`get_block("chart-44")`)
- One objective in depth: its daily burn down, forecast tail and a drag that sums spend: use [Error Budget Burn](https://reui.io/blocks/chart/bar-chart/chart-42.md) (`get_block("chart-42")`)

## Install

```bash
npx shadcn@latest add @reui/chart-41
```

## About Sparkline blocks

### When to use

- Rows of metric tiles, each pairing its value with a sparkline, a meter or a delta
- Health strips for cron jobs, SLOs or data syncs that open with KPI tiles and mini trends
- Metric lists where every row ends in a small trend and a change badge

### When not to use

- Plain KPI numbers that need only a delta badge, an actions menu or a progress bar: use the [Stats blocks](https://reui.io/blocks/application/stats.md)
- One metric that deserves a full width plot with axes and a tooltip: use the [Area Chart blocks](https://reui.io/blocks/chart/area-chart.md)
- A whole overview page that sets a header, summary tiles and a work list around its plots: use the [Dashboard blocks](https://reui.io/blocks/application/dashboard.md)

### Agent notes

- `Chart` takes no props and fetches nothing: every tile value and series comes from constants in the block's own folder

Every ReUI item has a twin like this one; the index is https://reui.io/llms.txt. Agents with the ReUI MCP (https://reui.io/docs/mcp) get the same guidance from the getters named above.