chore: Add isDefault to examples

packages/mermaid/src/diagram-api/detectType.ts

@@ -68,6 +68,14 @@ export const addDiagramDefinition = ({ id, ...definition }: DetectorRecord) => {
   if (diagramDefinitions[id]) {
     log.warn(`Detector with key ${id} already exists. Overwriting.`);
   }
+  if (
+    definition.examples &&
+    definition.examples.filter(({ isDefault }) => isDefault).length !== 1
+  ) {
+    throw new Error(
+      `Diagram with key ${id} must have exactly one default example. Set isDefault to true for one example.`
+    );
+  }
   diagramDefinitions[id] = definition;
   log.debug(`Detector with key ${id} added${definition.loader ? ' with loader' : ''}`);
 };

packages/mermaid/src/diagrams/architecture/architectureDetector.ts

@@ -23,6 +23,7 @@ const architecture: ExternalDiagramDefinition = {
   description: 'Visualize system architecture and components',
   examples: [
     {
+      isDefault: true,
       code: `architecture-beta
     group api(cloud)[API]
 

packages/mermaid/src/diagrams/block/blockDetector.ts

@@ -19,6 +19,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Create block-based visualizations with beta styling',
   examples: [
     {
+      isDefault: true,
       code: `block-beta
 columns 1
   db(("DB"))

packages/mermaid/src/diagrams/c4/c4Detector.ts

@@ -24,6 +24,7 @@ const plugin: ExternalDiagramDefinition = {
     'Visualize software architecture using the C4 model (Context, Container, Component, Code)',
   examples: [
     {
+      isDefault: true,
       code: `C4Context
     title System Context diagram for Internet Banking System
     Enterprise_Boundary(b0, "BankBoundary0") {

packages/mermaid/src/diagrams/class/classDetector-V2.ts

@@ -28,6 +28,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize class structures and relationships in object-oriented programming',
   examples: [
     {
+      isDefault: true,
       code: `classDiagram
     Animal <|-- Duck
     Animal <|-- Fish

packages/mermaid/src/diagrams/er/erDetector.ts

@@ -23,6 +23,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize database schemas and relationships between entities',
   examples: [
     {
+      isDefault: true,
       code: `erDiagram
     CUSTOMER ||--o{ ORDER : places
     ORDER ||--|{ ORDER_ITEM : contains

packages/mermaid/src/diagrams/flowchart/flowDetector-v2.ts

@@ -35,6 +35,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize flowcharts and directed graphs',
   examples: [
     {
+      isDefault: true,
       code: `flowchart TD
     A[Christmas] -->|Get money| B(Go shopping)
     B --> C{Let me think}

packages/mermaid/src/diagrams/gantt/ganttDetector.ts

@@ -23,6 +23,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize project schedules and timelines',
   examples: [
     {
+      isDefault: true,
       code: `gantt
     title A Gantt Diagram
     dateFormat  YYYY-MM-DD

packages/mermaid/src/diagrams/git/gitGraphDetector.ts

@@ -20,6 +20,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize Git repository history and branch relationships',
   examples: [
     {
+      isDefault: true,
       code: `gitGraph
     commit
     branch develop

packages/mermaid/src/diagrams/kanban/detector.ts

@@ -22,6 +22,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize work items in a Kanban board',
   examples: [
     {
+      isDefault: true,
       code: `---
 config:
   kanban:

packages/mermaid/src/diagrams/mindmap/detector.ts

@@ -22,6 +22,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize ideas and concepts in a tree-like structure',
   examples: [
     {
+      isDefault: true,
       code: `mindmap
   root((mindmap))
     Origins

packages/mermaid/src/diagrams/packet/detector.ts

@@ -23,6 +23,7 @@ export const packet: ExternalDiagramDefinition = {
   description: 'Visualize packet data and network traffic',
   examples: [
     {
+      isDefault: true,
       code: `---
 title: "TCP Packet"
 ---

packages/mermaid/src/diagrams/pie/pieDetector.ts

@@ -23,6 +23,7 @@ export const pie: ExternalDiagramDefinition = {
   description: 'Visualize data as proportional segments of a circle',
   examples: [
     {
+      isDefault: true,
       code: `pie title Pets adopted by volunteers
     "Dogs" : 386
     "Cats" : 85

packages/mermaid/src/diagrams/quadrant-chart/quadrantDetector.ts

@@ -23,6 +23,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize items in a 2x2 matrix based on two variables',
   examples: [
     {
+      isDefault: true,
       code: `quadrantChart
     title Reach and engagement of campaigns
     x-axis Low Reach --> High Reach

packages/mermaid/src/diagrams/radar/detector.ts

@@ -23,6 +23,7 @@ export const radar: ExternalDiagramDefinition = {
   description: 'Visualize data in a radial format',
   examples: [
     {
+      isDefault: true,
       code: `---
 title: "Grades"
 ---

packages/mermaid/src/diagrams/requirement/requirementDetector.ts

@@ -23,6 +23,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize system requirements and their relationships',
   examples: [
     {
+      isDefault: true,
       code: `requirementDiagram
 
     requirement test_req {

packages/mermaid/src/diagrams/sankey/sankeyDetector.ts

@@ -19,6 +19,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize flow quantities between different stages or processes',
   examples: [
     {
+      isDefault: true,
       code: `---
 config:
   sankey:

packages/mermaid/src/diagrams/sequence/sequenceDetector.ts

@@ -23,6 +23,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize interactions between objects over time',
   examples: [
     {
+      isDefault: true,
       code: `sequenceDiagram
     Alice->>+John: Hello John, how are you?
     Alice->>+John: John, can you hear me?

packages/mermaid/src/diagrams/state/stateDetector-V2.ts

@@ -29,6 +29,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize state transitions and behaviors of a system',
   examples: [
     {
+      isDefault: true,
       code: `stateDiagram-v2
     [*] --> Still
     Still --> [*]

packages/mermaid/src/diagrams/timeline/detector.ts

@@ -23,6 +23,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize events and milestones in chronological order',
   examples: [
     {
+      isDefault: true,
       code: `timeline
     title History of Social Media Platform
     2002 : LinkedIn

packages/mermaid/src/diagrams/user-journey/journeyDetector.ts

@@ -23,6 +23,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Visualize user interactions and experiences with a system',
   examples: [
     {
+      isDefault: true,
       code: `journey
     title My working day
     section Go to work

packages/mermaid/src/diagrams/xychart/xychartDetector.ts

@@ -23,6 +23,7 @@ const plugin: ExternalDiagramDefinition = {
   description: 'Create scatter plots and line charts with customizable axes',
   examples: [
     {
+      isDefault: true,
       code: `xychart-beta
     title "Sales Revenue"
     x-axis [jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec]