Add semanticGradient, downward hist, nodeStyle

.clinerules

@@ -84,7 +84,7 @@ Helpers: `resolveReferenceGeography("world-110m"|"world-50m")`, `mergeData(featu
 
 Push API: `ref.current.push({ time, value })`. All pushed data **must** include a time field.
 
-**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
+**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`, `direction`), **TemporalHistogram** (static-data sibling of RealtimeHistogram — same props minus `windowSize`/`windowMode`; takes a bounded `data` array), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
 
 Encoding: `decay`, `pulse`, `transition`, `staleness` — compose freely.
 

.cursorrules

@@ -84,7 +84,7 @@ Helpers: `resolveReferenceGeography("world-110m"|"world-50m")`, `mergeData(featu
 
 Push API: `ref.current.push({ time, value })`. All pushed data **must** include a time field.
 
-**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
+**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`, `direction`), **TemporalHistogram** (static-data sibling of RealtimeHistogram — same props minus `windowSize`/`windowMode`; takes a bounded `data` array), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
 
 Encoding: `decay`, `pulse`, `transition`, `staleness` — compose freely.
 

.github/copilot-instructions.md

@@ -84,7 +84,7 @@ Helpers: `resolveReferenceGeography("world-110m"|"world-50m")`, `mergeData(featu
 
 Push API: `ref.current.push({ time, value })`. All pushed data **must** include a time field.
 
-**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
+**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`, `direction`), **TemporalHistogram** (static-data sibling of RealtimeHistogram — same props minus `windowSize`/`windowMode`; takes a bounded `data` array), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
 
 Encoding: `decay`, `pulse`, `transition`, `staleness` — compose freely.
 

.github/workflows/node.js.yml

@@ -200,7 +200,7 @@ jobs:
         # first time and skipped on subsequent runs — which left
         # single-test misses (a flaky run, a renamed test) permanently
         # failing CI because no second bootstrap pass would fire.
-        run: npx playwright test --update-snapshots=missing
+        run: npx playwright test --update-snapshots=changed
 
       - name: Upload snapshot baselines
         if: always()

.windsurfrules

@@ -84,7 +84,7 @@ Helpers: `resolveReferenceGeography("world-110m"|"world-50m")`, `mergeData(featu
 
 Push API: `ref.current.push({ time, value })`. All pushed data **must** include a time field.
 
-**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
+**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`, `direction`), **TemporalHistogram** (static-data sibling of RealtimeHistogram — same props minus `windowSize`/`windowMode`; takes a bounded `data` array), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
 
 Encoding: `decay`, `pulse`, `transition`, `staleness` — compose freely.
 

CLAUDE.md

@@ -84,7 +84,7 @@ Helpers: `resolveReferenceGeography("world-110m"|"world-50m")`, `mergeData(featu
 
 Push API: `ref.current.push({ time, value })`. All pushed data **must** include a time field.
 
-**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
+**RealtimeLineChart**, **RealtimeHistogram** (+ `brush`, `onBrush`, `linkedBrush`, `direction`), **TemporalHistogram** (static-data sibling of RealtimeHistogram — same props minus `windowSize`/`windowMode`; takes a bounded `data` array), **RealtimeSwarmChart**, **RealtimeWaterfallChart**, **RealtimeHeatmap**, **Streaming Sankey** (StreamNetworkFrame + `showParticles`)
 
 Encoding: `decay`, `pulse`, `transition`, `staleness` — compose freely.
 

ai/capabilities.json

@@ -595,6 +595,19 @@
       "specialFeatures": [
         "live-stream"
       ]
+    },
+    "TemporalHistogram": {
+      "category": "realtime",
+      "supportsLegend": true,
+      "supportsSelection": true,
+      "supportsLinkedHover": true,
+      "supportsPush": false,
+      "supportsSSR": false,
+      "colorModel": "categorical",
+      "layoutMode": "plugin",
+      "specialFeatures": [
+        "brush"
+      ]
     }
   }
 }

ai/componentMetadata.cjs

@@ -21,7 +21,7 @@ const COMPONENTS_BY_CATEGORY = {
     "ChoroplethMap", "ProportionalSymbolMap", "FlowMap", "DistanceCartogram",
   ],
   realtime: [
-    "RealtimeLineChart", "RealtimeHistogram", "RealtimeSwarmChart",
+    "RealtimeLineChart", "RealtimeHistogram", "TemporalHistogram", "RealtimeSwarmChart",
     "RealtimeWaterfallChart", "RealtimeHeatmap",
   ],
 }
@@ -52,11 +52,18 @@ function importPathForCategory(category) {
 function metadataForComponent(entryOrName) {
   const name = typeof entryOrName === "string" ? entryOrName : entryOrName.name
   const category = categoryForComponent(name)
+  // Realtime push-streaming charts are browser-only by design.
+  // TemporalHistogram is the static-data sibling living in the
+  // "realtime" category for documentation grouping — it accepts a
+  // bounded data array and is renderable through the SSR path like
+  // any other static HOC. Matches the name-prefix exclusion the
+  // check-surface-parity script applies.
+  const isPushOnly = category === "realtime" && name.startsWith("Realtime")
   return {
     name,
     category,
     importPath: importPathForCategory(category),
-    renderable: category !== "realtime",
+    renderable: !isPushOnly,
     description: typeof entryOrName === "string" ? undefined : entryOrName.description,
   }
 }

ai/componentRegistry.ts

@@ -10,7 +10,8 @@ import {
   BarChart, StackedBarChart, GroupedBarChart, SwarmPlot, BoxPlot, DotPlot,
   Histogram, ViolinPlot, RidgelinePlot,
   PieChart, DonutChart, GaugeChart, FunnelChart, LikertChart, SwimlaneChart,
-  ForceDirectedGraph, ChordDiagram, SankeyDiagram, ProcessSankey, TreeDiagram, Treemap, CirclePack, OrbitDiagram
+  ForceDirectedGraph, ChordDiagram, SankeyDiagram, ProcessSankey, TreeDiagram, Treemap, CirclePack, OrbitDiagram,
+  TemporalHistogram
 } from "semiotic/ai"
 
 import {
@@ -36,6 +37,7 @@ export const COMPONENT_REGISTRY: Record<string, RegistryEntry> = {
   QuadrantChart: { component: QuadrantChart, category: "xy" },
   MultiAxisLineChart: { component: MultiAxisLineChart, category: "xy" },
   CandlestickChart: { component: CandlestickChart, category: "xy" },
+  TemporalHistogram: { component: TemporalHistogram, category: "xy" },
 
   BarChart: { component: BarChart, category: "ordinal" },
   StackedBarChart: { component: StackedBarChart, category: "ordinal" },

ai/examples.md

@@ -292,6 +292,33 @@ const data = [
 
 Key props: `orderAccessor` sequences points along the path, Viridis gradient from start→end
 
+### TemporalHistogram
+
+```jsx
+import { TemporalHistogram } from "semiotic/ai"
+
+// One row per event; the chart bins events into `binSize` time buckets.
+const events = [
+  { time: 1700000000000, value: 1, category: "errors" },
+  { time: 1700000005000, value: 1, category: "warnings" },
+  { time: 1700000007000, value: 1, category: "errors" },
+  { time: 1700000020000, value: 1, category: "info" },
+  { time: 1700000022000, value: 1, category: "info" },
+  { time: 1700000040000, value: 1, category: "errors" },
+  { time: 1700000045000, value: 1, category: "warnings" }
+]
+
+<TemporalHistogram
+  data={events}
+  binSize={15000}
+  categoryAccessor="category"
+  colors={{ errors: "#dc3545", warnings: "#fd7e14", info: "#007bff" }}
+  enableHover
+/>
+```
+
+Static-data sibling of `RealtimeHistogram` — accepts a bounded `data` array instead of a push-mode ref. Same props minus `windowSize` / `windowMode`. Use for backfilled or historical temporal histograms where the time range is fixed; reach for `RealtimeHistogram` when events arrive over time and you want a sliding window.
+
 ---
 
 ## Flat Array — Ordinal Charts