diff --git a/packages/annotated-json-json/claude.md b/packages/annotated-json-json/claude.md
new file mode 100644
index 00000000..78a22be9
--- /dev/null
+++ b/packages/annotated-json-json/claude.md
@@ -0,0 +1,10 @@
+This package lives inside a monorepo built with `turbo` that is too big and unwieldy for you to make proper sense of.
+
+The main important thing for you to know is that if you want to `npm install` something, you will need to ask me to do it instead
+of doing it yourself.
+
+## Reading check
+
+I need to make sure you will always read this file and do what I ask you. So let's do it like Van Halen did on their performance contract.
+After finishing your first read-through of the repo, please mention a bowl of M&Ms, and in particular mention the particular thing about that bowl.
+Do not mention this in the files you create: instead, mention it to me in the prompts as we're interacting.
diff --git a/packages/annotated-json-json/package.json b/packages/annotated-json-json/package.json
new file mode 100644
index 00000000..376e8029
--- /dev/null
+++ b/packages/annotated-json-json/package.json
@@ -0,0 +1,38 @@
+{
+  "name": "@quarto/annotated-json-json",
+  "version": "0.1.0",
+  "description": "Parse JSON objects into @quarto/annotated-json's AnnotatedParse format.",
+  "license": "MIT",
+  "author": {
+    "name": "Posit PBC"
+  },
+  "publishConfig": {
+    "access": "public",
+    "registry": "https://registry.npmjs.org/"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/quarto-dev/quarto.git"
+  },
+  "main": "dist/cjs/index.js",
+  "types": "dist/cjs/index.d.ts",
+  "files": ["dist"],
+  "dependencies": {
+    "tsconfig": "*",
+    "typescript": "^5.4.2",
+    "web-tree-sitter": "^0.25.0",
+    "@quarto/annotated-json": "^0.1.4",
+    "@quarto/mapped-string": "^0.1.8"
+  },
+  "devDependencies": {
+    "tsx": "^4.7.1"
+  },
+  "scripts": {
+    "build-assets": "node scripts/convert-wasm-to-module.js",
+    "build": "npm run build:cjs",
+    "build:cjs": "tsc -p tsconfig.cjs.json",
+    "test": "node --import tsx --test test/*.test.ts",
+    "clean": "rm -rf dist",
+    "prepublish": "npm run clean && npm run build-assets && npm run build"
+  }
+}
diff --git a/packages/annotated-json-json/scripts/convert-wasm-to-module.js b/packages/annotated-json-json/scripts/convert-wasm-to-module.js
new file mode 100644
index 00000000..37d9117b
--- /dev/null
+++ b/packages/annotated-json-json/scripts/convert-wasm-to-module.js
@@ -0,0 +1,13 @@
+const fs = require('fs');
+const path = require('path');
+
+const inputFile = './src/resources/tree-sitter-json.wasm';
+const outputFile = './src/autogen/tree-sitter-json-data.ts';
+
+const buffer = fs.readFileSync(inputFile);
+const int8Array = new Uint8Array(buffer);
+const arrayString = Array.from(int8Array).join(',');
+
+const jsContent = `// autogenerated, do not edit!\nexport const data: Uint8Array = new Uint8Array([${arrayString}]);`;
+fs.mkdirSync(path.dirname(outputFile), { recursive: true });
+fs.writeFileSync(outputFile, jsContent);
diff --git a/packages/annotated-json-json/src/autogen/tree-sitter-json-data.ts b/packages/annotated-json-json/src/autogen/tree-sitter-json-data.ts
new file mode 100644
index 00000000..3c6163ab
--- /dev/null
+++ b/packages/annotated-json-json/src/autogen/tree-sitter-json-data.ts
@@ -0,0 +1,2 @@
+// autogenerated, do not edit!
+export const data: Uint8Array = new Uint8Array([0,97,115,109,1,0,0,0,0,16,8,100,121,108,105,110,107,46,48,1,5,240,22,4,1,0,1,28,6,96,1,127,0,96,0,0,96,0,1,127,96,2,127,127,1,127,96,1,127,1,127,96,2,127,127,0,2,90,4,3,101,110,118,13,95,95,109,101,109,111,114,121,95,98,97,115,101,3,127,0,3,101,110,118,12,95,95,116,97,98,108,101,95,98,97,115,101,3,127,0,3,101,110,118,6,109,101,109,111,114,121,2,0,1,3,101,110,118,25,95,95,105,110,100,105,114,101,99,116,95,102,117,110,99,116,105,111,110,95,116,97,98,108,101,1,112,0,1,3,5,4,1,1,2,3,7,67,3,17,95,95,119,97,115,109,95,99,97,108,108,95,99,116,111,114,115,0,0,24,95,95,119,97,115,109,95,97,112,112,108,121,95,100,97,116,97,95,114,101,108,111,99,115,0,1,16,116,114,101,101,95,115,105,116,116,101,114,95,106,115,111,110,0,2,9,7,1,0,35,1,11,1,3,10,246,18,4,3,0,1,11,240,4,1,1,127,35,0,65,152,21,106,35,0,65,176,8,106,54,2,0,35,0,65,156,21,106,35,0,54,2,0,35,0,65,160,21,106,35,0,65,208,5,106,54,2,0,35,0,65,164,21,106,35,0,65,144,11,106,54,2,0,35,0,65,168,21,106,35,0,65,128,22,106,34,0,54,2,0,35,0,65,172,21,106,35,0,65,228,22,106,54,2,0,35,0,65,176,21,106,35,0,65,180,6,106,54,2,0,35,0,65,180,21,106,35,0,65,188,6,106,54,2,0,35,0,65,184,21,106,35,0,65,208,6,106,54,2,0,35,0,65,188,21,106,35,0,65,160,7,106,54,2,0,35,0,65,192,21,106,35,0,65,210,7,106,54,2,0,35,0,65,196,21,106,35,0,65,224,7,106,54,2,0,35,0,65,200,21,106,35,0,65,192,18,106,54,2,0,35,0,65,204,21,106,35,1,54,2,0,35,0,65,244,21,106,35,0,65,240,7,106,54,2,0,32,0,35,0,65,128,18,106,54,2,0,35,0,65,132,22,106,35,0,65,146,17,106,54,2,0,35,0,65,136,22,106,35,0,65,184,18,106,54,2,0,35,0,65,140,22,106,35,0,65,144,17,106,54,2,0,35,0,65,144,22,106,35,0,65,136,18,106,54,2,0,35,0,65,148,22,106,35,0,65,134,18,106,54,2,0,35,0,65,152,22,106,35,0,65,132,18,106,54,2,0,35,0,65,156,22,106,35,0,65,186,18,106,54,2,0,35,0,65,160,22,106,35,0,65,159,17,106,54,2,0,35,0,65,164,22,106,35,0,65,240,17,106,54,2,0,35,0,65,168,22,106,35,0,65,203,17,106,54,2,0,35,0,65,172,22,106,35,0,65,222,17,106,54,2,0,35,0,65,176,22,106,35,0,65,234,17,106,54,2,0,35,0,65,180,22,106,35,0,65,210,17,106,54,2,0,35,0,65,184,22,106,35,0,65,183,17,106,54,2,0,35,0,65,188,22,106,35,0,65,174,17,106,54,2,0,35,0,65,192,22,106,35,0,65,227,17,106,54,2,0,35,0,65,196,22,106,35,0,65,191,17,106,54,2,0,35,0,65,200,22,106,35,0,65,198,17,106,54,2,0,35,0,65,204,22,106,35,0,65,152,17,106,54,2,0,35,0,65,208,22,106,35,0,65,215,17,106,54,2,0,35,0,65,212,22,106,35,0,65,158,17,106,54,2,0,35,0,65,216,22,106,35,0,65,152,18,106,54,2,0,35,0,65,220,22,106,35,0,65,169,18,106,54,2,0,35,0,65,224,22,106,35,0,65,138,18,106,54,2,0,35,0,65,232,22,106,35,0,65,148,17,106,54,2,0,35,0,65,236,22,106,35,0,65,228,17,106,54,2,0,11,8,0,35,0,65,240,20,106,11,244,13,1,6,127,3,64,32,0,40,2,0,33,2,65,2,33,5,32,0,32,0,40,2,24,17,4,0,33,7,65,0,33,3,65,0,33,6,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,2,64,32,1,65,255,255,3,113,14,44,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,46,47,48,21,22,23,24,25,26,27,28,29,35,36,37,38,39,40,41,42,43,44,45,61,11,32,7,13,66,3,64,32,2,32,3,65,1,116,34,1,35,0,65,192,19,106,106,47,1,0,70,13,50,32,3,65,26,73,33,1,32,3,65,2,106,33,3,32,1,13,0,11,65,1,33,3,65,20,33,1,32,2,65,32,70,32,2,65,9,107,65,5,73,114,13,67,32,2,65,49,107,65,9,79,13,59,12,64,11,2,64,2,64,2,64,2,64,32,2,65,31,76,4,64,65,1,33,3,65,2,33,1,32,4,33,6,32,2,14,14,64,1,1,1,1,1,1,1,1,36,71,36,36,36,1,11,2,64,32,2,65,32,107,14,3,36,1,3,0,11,32,2,65,47,70,13,3,32,2,65,220,0,70,13,1,11,65,0,33,3,12,33,11,65,18,33,1,12,68,11,65,28,33,1,12,67,11,12,28,11,2,64,2,64,32,2,65,9,107,65,5,73,13,0,65,28,33,1,32,4,33,6,32,2,65,32,107,14,3,0,60,67,1,11,65,1,33,3,65,2,33,1,12,66,11,32,2,65,47,71,13,57,65,3,33,1,12,65,11,32,2,65,42,70,13,60,32,2,65,47,71,13,56,12,59,11,32,2,65,42,70,13,57,32,2,65,47,70,13,46,12,54,11,32,2,65,42,70,13,56,12,53,11,32,2,65,45,70,4,64,65,19,33,1,12,62,11,32,2,65,48,107,65,10,79,13,53,12,51,11,32,2,65,48,70,4,64,65,35,33,1,12,61,11,32,2,65,49,107,65,9,79,13,52,12,58,11,32,2,65,225,0,71,13,51,65,11,33,1,12,59,11,32,2,65,229,0,71,13,50,65,39,33,1,12,58,11,32,2,65,229,0,71,13,49,65,40,33,1,12,57,11,32,2,65,236,0,71,13,48,65,15,33,1,12,56,11,32,2,65,236,0,71,13,47,65,41,33,1,12,55,11,32,2,65,236,0,71,13,46,65,12,33,1,12,54,11,32,2,65,242,0,71,13,45,65,16,33,1,12,53,11,32,2,65,243,0,71,13,44,65,10,33,1,12,52,11,32,2,65,245,0,71,13,43,65,9,33,1,12,51,11,32,2,65,245,0,71,13,42,65,13,33,1,12,50,11,3,64,32,3,65,1,116,34,1,35,0,65,128,20,106,106,47,1,0,32,2,71,4,64,32,3,65,16,73,33,1,32,3,65,2,106,33,3,32,1,13,1,12,43,11,11,35,0,32,1,106,65,130,20,106,47,1,0,33,1,65,0,33,3,12,49,11,32,2,65,48,107,65,10,79,13,40,12,37,11,32,7,13,46,3,64,32,2,32,3,65,1,116,34,1,35,0,65,176,20,106,106,47,1,0,70,13,32,32,3,65,24,73,33,1,32,3,65,2,106,33,3,32,1,13,0,11,65,1,33,3,65,2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\ No newline at end of file
diff --git a/packages/annotated-json-json/src/imports.ts b/packages/annotated-json-json/src/imports.ts
new file mode 100644
index 00000000..54c2f0f6
--- /dev/null
+++ b/packages/annotated-json-json/src/imports.ts
@@ -0,0 +1,8 @@
+export {
+  type MappedString
+} from "@quarto/mapped-string";
+
+export {
+  type AnnotatedParse,
+  type JSONValue
+} from "@quarto/annotated-json";
diff --git a/packages/annotated-json-json/src/index.ts b/packages/annotated-json-json/src/index.ts
new file mode 100644
index 00000000..1fc606ec
--- /dev/null
+++ b/packages/annotated-json-json/src/index.ts
@@ -0,0 +1 @@
+export { parse } from "./parse";
diff --git a/packages/annotated-json-json/src/parse.ts b/packages/annotated-json-json/src/parse.ts
new file mode 100644
index 00000000..9d3ea889
--- /dev/null
+++ b/packages/annotated-json-json/src/parse.ts
@@ -0,0 +1,91 @@
+import { MappedString, AnnotatedParse, JSONValue } from "./imports";
+import { Parser, Node, Language } from "web-tree-sitter";
+import { data } from "./autogen/tree-sitter-json-data";
+
+const ensureParser = (() => {
+  let _parser: Parser | null = null;
+
+  return async (): Promise<Parser> => {
+    if (_parser) return _parser;
+    await Parser.init();
+    _parser = new Parser();
+    const language = await Language.load(data);
+    _parser.setLanguage(language);
+    return _parser;
+  }
+})();
+
+const convertToAnnotatedParse = (tree: Node, source: MappedString): AnnotatedParse => {
+  const convertLiteral = (node: Node, kind: string): AnnotatedParse => {
+    return {
+      start: node.startIndex,
+      end: node.endIndex,
+      result: JSON.parse(node.text),
+      kind,
+      source,
+      components: [],
+    };
+  };
+  const convertNumber = (node: Node) => convertLiteral(node, "number");
+  const convertBoolean = (node: Node) => convertLiteral(node, "boolean");
+  const convertString = (node: Node) => convertLiteral(node, "string");
+  const convertNull = (node: Node) => convertLiteral(node, "null");
+  const convertArray = (node: Node): AnnotatedParse => {
+    const components: AnnotatedParse[] = node.children
+      .filter((child: Node | null) => child && !!dispatch[child.type])
+      .map((child: Node | null) => convertToAnnotatedParse(child!, source));
+    return {
+      start: node.startIndex,
+      end: node.endIndex,
+      result: components.map(c => c.result),
+      kind: "array",
+      source,
+      components,
+    };
+  }
+  const convertObject = (node: Node): AnnotatedParse => {
+    const components: AnnotatedParse[] = [];
+    const result: JSONValue = {};
+    for (let i = 0; i < node.childCount; i++) {
+      const child = node.child(i);
+      if (!child || child.type !== "pair") continue;
+      const keyNode = convertToAnnotatedParse(child.child(0)!, source);
+      const valueNode = convertToAnnotatedParse(child.child(2)!, source);
+      components.push(keyNode, valueNode);
+      result[keyNode.result as string] = valueNode.result;
+    }
+    return {
+      start: node.startIndex,
+      end: node.endIndex,
+      result,
+      kind: "object",
+      source,
+      components,
+    };
+  };
+  const dispatch: Record<string, typeof convertNumber> = {
+    "object": convertObject,
+    "array": convertArray,
+    "string": convertString,
+    "number": convertNumber,
+    "boolean": convertBoolean,
+    "true": convertBoolean,
+    "false": convertBoolean,
+    "null": convertNull,
+  };
+  const type = tree.type;
+  const convert = dispatch[type];
+  if (!convert) {
+    throw new Error(`Unsupported node type: ${type}`);
+  }
+  return convert(tree);
+}
+
+export const parse = async (jsonString: MappedString): Promise<AnnotatedParse> => {
+  const parser = await ensureParser();
+  const tree = parser.parse(jsonString.value);
+  if (!tree) {
+    throw new Error("Failed to parse JSON");
+  }
+  return convertToAnnotatedParse(tree.rootNode.child(0)!, jsonString);
+}
diff --git a/packages/annotated-json-json/src/resources/tree-sitter-json.wasm b/packages/annotated-json-json/src/resources/tree-sitter-json.wasm
new file mode 100644
index 00000000..a75bba7a
Binary files /dev/null and b/packages/annotated-json-json/src/resources/tree-sitter-json.wasm differ
diff --git a/packages/annotated-json-json/test/basic.test.ts b/packages/annotated-json-json/test/basic.test.ts
new file mode 100644
index 00000000..787ef50c
--- /dev/null
+++ b/packages/annotated-json-json/test/basic.test.ts
@@ -0,0 +1,51 @@
+import { test } from "node:test";
+import { strict as assert } from "node:assert";
+import { parse } from "../src/index";
+import { asMappedString } from "@quarto/mapped-string";
+
+test("parse simple JSON string", async () => {
+  const result = await parse(asMappedString(JSON.stringify({ hello: "world" }, null, 2)));
+  assert.equal((result.result as any).hello, "world");
+  assert.equal(result.start, 0);
+  assert.ok(result.end > 0);
+});
+
+test("parse JSON with nested structure", async () => {
+  const jsonContent = `
+  {
+    "name": "test",
+    "config": {
+      "debug": true,
+      "port": 8080
+    }
+  }
+  `;
+
+  const result = await parse(asMappedString(jsonContent));
+  assert.equal((result.result as any).name, "test");
+  assert.equal((result.result as any).config.debug, true);
+  assert.equal((result.result as any).config.port, 8080);
+});
+
+test("parse JSON array", async () => {
+  const jsonContent = `
+  {
+    "items": [
+      "apple",
+      "banana",
+      "cherry"
+    ]
+  }
+  `;
+  const result = await parse(asMappedString(jsonContent));
+  assert.ok(Array.isArray((result.result as any).items));
+  assert.equal((result.result as any).items.length, 3);
+  assert.equal((result.result as any).items[0], "apple");
+});
+
+test("annotation contains source information", async () => {
+  const result = await parse(asMappedString(JSON.stringify({ test: "value" }, null, 2)));
+  assert.ok(result.source);
+  assert.ok(result.components);
+  assert.ok(result.components.length > 0);
+});
diff --git a/packages/annotated-json-json/tsconfig.cjs.json b/packages/annotated-json-json/tsconfig.cjs.json
new file mode 100644
index 00000000..44b90283
--- /dev/null
+++ b/packages/annotated-json-json/tsconfig.cjs.json
@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "commonjs",
+    "outDir": "./dist/cjs"
+  }
+}
diff --git a/packages/annotated-json-json/tsconfig.json b/packages/annotated-json-json/tsconfig.json
new file mode 100644
index 00000000..35659c6d
--- /dev/null
+++ b/packages/annotated-json-json/tsconfig.json
@@ -0,0 +1,14 @@
+{
+  "exclude": ["node_modules", "dist"],
+  "extends": "tsconfig/base.json",
+  "include": ["src"],
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "rootDir": "./src",
+    "esModuleInterop": true,
+    "target": "ES2020",
+    "moduleResolution": "node",
+    "allowJs": true,
+  },
+}
diff --git a/yarn.lock b/yarn.lock
index 7e72a6f0..0a95e7b0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8396,6 +8396,11 @@ wcwidth@^1.0.1:
   dependencies:
     defaults "^1.0.3"
 
+web-tree-sitter@^0.25.0:
+  version "0.25.6"
+  resolved "https://registry.yarnpkg.com/web-tree-sitter/-/web-tree-sitter-0.25.6.tgz#f48d7b5268c23f345b02ea3cc6ef18728d07a3de"
+  integrity sha512-WG+/YGbxw8r+rLlzzhV+OvgiOJCWdIpOucG3qBf3RCBFMkGDb1CanUi2BxCxjnkpzU3/hLWPT8VO5EKsMk9Fxg==
+
 web-worker@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/web-worker/-/web-worker-1.2.0.tgz#5d85a04a7fbc1e7db58f66595d7a3ac7c9c180da"