fix(core): preserve shared metadata in json-simple

.changeset/flat-bushes-learn.md

@@ -0,0 +1,5 @@
+---
+'@doc-kit/core': patch
+---
+
+Keep json-simple output generation from mutating shared metadata entries.

packages/core/src/generators/json-simple/__tests__/generate.test.mjs

@@ -0,0 +1,45 @@
+import assert from 'node:assert/strict';
+import { describe, it } from 'node:test';
+
+import { setConfig } from '#utils/configuration/index.mjs';
+
+import { generate } from '../generate.mjs';
+
+const config = await setConfig({ target: ['json-simple'] });
+config['json-simple'].output = undefined;
+
+describe('json-simple generate', () => {
+  it('does not mutate input while removing headings and stability nodes', async () => {
+    const heading = {
+      type: 'heading',
+      depth: 1,
+      children: [{ type: 'text', value: 'fs' }],
+    };
+    const stability = {
+      type: 'blockquote',
+      children: [
+        {
+          type: 'paragraph',
+          children: [{ type: 'text', value: 'Stability: 2 - Stable' }],
+        },
+      ],
+    };
+    const paragraph = {
+      type: 'paragraph',
+      children: [{ type: 'text', value: 'The fs module.' }],
+    };
+    const input = [
+      {
+        heading,
+        content: { type: 'root', children: [heading, stability, paragraph] },
+      },
+    ];
+    const snapshot = structuredClone(input);
+
+    const output = await generate(input);
+
+    assert.deepEqual(input, snapshot);
+    assert.deepEqual(output[0].content.children, [paragraph]);
+    assert.notEqual(output[0].content, input[0].content);
+  });
+});

packages/core/src/generators/json-simple/generate.mjs

@@ -16,13 +16,21 @@ import { UNIST } from '#utils/queries/index.mjs';
 export async function generate(input) {
   const config = getConfig('json-simple');
 
-  input.forEach(node =>
-    remove(node.content, [UNIST.isStabilityNode, UNIST.isHeading])
-  );
+  const output = input.map(entry => {
+    const copy = { ...entry, content: structuredClone(entry.content) };
+
+    remove(copy.content, [UNIST.isStabilityNode, UNIST.isHeading]);
+
+    return copy;
+  });
 
   if (config.output) {
-    await writeJSON(join(config.output, 'api-docs.json'), input, config.minify);
+    await writeJSON(
+      join(config.output, 'api-docs.json'),
+      output,
+      config.minify
+    );
   }
 
-  return input;
+  return output;
 }