diff --git a/packages/adapters/adaptive-cards/examples/teams-webhook.ts b/packages/adapters/adaptive-cards/examples/teams-webhook.ts
new file mode 100644
index 0000000..0e764c7
--- /dev/null
+++ b/packages/adapters/adaptive-cards/examples/teams-webhook.ts
@@ -0,0 +1,57 @@
+import { UITree } from "@json-render/core";
+import { renderAdaptiveCard, AdaptiveCardRegistry, createActionSubmit } from "../src";
+
+const tree: UITree = {
+  root: "root",
+  elements: {
+    root: {
+      key: "root",
+      type: "Card",
+      props: { title: "Daily Report" },
+      children: ["metric1", "button1"]
+    },
+    metric1: {
+      key: "metric1",
+      type: "Metric",
+      props: { label: "Revenue", value: "$10,000" }
+    },
+    button1: {
+      key: "button1",
+      type: "Button",
+      props: { label: "Approve", action: { name: "approve", params: { id: "123" } } }
+    }
+  }
+};
+
+const registry: AdaptiveCardRegistry = {
+  Card: (element, children) => ({
+    type: "Container",
+    items: [
+      {
+        type: "TextBlock",
+        text: element.props.title,
+        size: "Large",
+        weight: "Bolder"
+      },
+      ...children
+    ]
+  }),
+  Metric: (element) => ({
+    type: "FactSet",
+    facts: [
+      { title: element.props.label, value: element.props.value }
+    ]
+  }),
+  Button: (element) => ({
+    type: "ActionSet",
+    actions: [
+      createActionSubmit(element.props.label, element.props.action)
+    ]
+  })
+};
+
+const card = renderAdaptiveCard(tree, registry);
+
+// Output the card JSON
+// This JSON can be sent to a Teams Incoming Webhook or used in Bot Framework
+console.log(JSON.stringify(card, null, 2));
diff --git a/packages/adapters/adaptive-cards/package.json b/packages/adapters/adaptive-cards/package.json
new file mode 100644
index 0000000..f6cb690
--- /dev/null
+++ b/packages/adapters/adaptive-cards/package.json
@@ -0,0 +1,54 @@
+{
+  "name": "@json-render/adaptive-cards",
+  "version": "0.1.0",
+  "license": "Apache-2.0",
+  "description": "Adaptive Cards adapter for @json-render/core.",
+  "keywords": [
+    "json",
+    "ui",
+    "adaptive-cards",
+    "microsoft",
+    "teams",
+    "outlook",
+    "ai",
+    "generative-ui"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/vercel-labs/json-render.git",
+    "directory": "packages/adapters/adaptive-cards"
+  },
+  "homepage": "https://github.com/vercel-labs/json-render#readme",
+  "bugs": {
+    "url": "https://github.com/vercel-labs/json-render/issues"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "main": "./dist/index.js",
+  "module": "./dist/index.mjs",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.mjs",
+      "require": "./dist/index.js"
+    }
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "tsup",
+    "dev": "tsup --watch",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@json-render/core": "workspace:*"
+  },
+  "devDependencies": {
+    "@repo/typescript-config": "workspace:*",
+    "tsup": "^8.0.2",
+    "typescript": "^5.4.5"
+  }
+}
diff --git a/packages/adapters/adaptive-cards/src/index.test.ts b/packages/adapters/adaptive-cards/src/index.test.ts
new file mode 100644
index 0000000..1a8a13c
--- /dev/null
+++ b/packages/adapters/adaptive-cards/src/index.test.ts
@@ -0,0 +1,126 @@
+import { describe, it, expect } from "vitest";
+import { UITree } from "@json-render/core";
+import { renderAdaptiveCard, AdaptiveCardRegistry, createActionSubmit } from "./index";
+
+describe("renderAdaptiveCard", () => {
+  it("should render a simple tree to Adaptive Card", () => {
+    const tree: UITree = {
+      root: "root",
+      elements: {
+        root: {
+          key: "root",
+          type: "Card",
+          props: { title: "Test Card" },
+          children: ["child1"]
+        },
+        child1: {
+          key: "child1",
+          type: "Text",
+          props: { content: "Hello World" }
+        }
+      }
+    };
+
+    const registry: AdaptiveCardRegistry = {
+      Card: (element, children) => ({
+        type: "Container",
+        items: [
+          { type: "TextBlock", text: element.props.title, weight: "Bolder" },
+          ...children
+        ]
+      }),
+      Text: (element) => ({
+        type: "TextBlock",
+        text: element.props.content
+      })
+    };
+
+    const result = renderAdaptiveCard(tree, registry);
+
+    expect(result).toEqual({
+      type: "AdaptiveCard",
+      version: "1.5",
+      body: [
+        {
+          type: "Container",
+          items: [
+            { type: "TextBlock", text: "Test Card", weight: "Bolder" },
+            { type: "TextBlock", text: "Hello World" }
+          ]
+        }
+      ]
+    });
+  });
+
+  it("should handle actions", () => {
+    const tree: UITree = {
+      root: "btn",
+      elements: {
+        btn: {
+          key: "btn",
+          type: "Button",
+          props: { label: "Click Me", action: { name: "click" } }
+        }
+      }
+    };
+
+    const registry: AdaptiveCardRegistry = {
+      Button: (element) => createActionSubmit(element.props.label, element.props.action)
+    };
+
+    const result = renderAdaptiveCard(tree, registry);
+
+    // Note: renderAdaptiveCard wraps root elements in body.
+    // If root element is Action.Submit, it might not be valid inside body directly without ActionSet,
+    // but the adapter blindly puts it there.
+    // Adaptive Cards schema requires Actions to be in 'actions' or 'ActionSet'.
+    // But let's verify the adapter output matches what we expect.
+
+    expect(result).toEqual({
+      type: "AdaptiveCard",
+      version: "1.5",
+      body: [
+        {
+          type: "Action.Submit",
+          title: "Click Me",
+          data: { name: "click" }
+        }
+      ]
+    });
+  });
+
+  it("should handle fragments (array of elements from component)", () => {
+    const tree: UITree = {
+      root: "root",
+      elements: {
+        root: { key: "root", type: "Container", children: ["fields"] },
+        fields: { key: "fields", type: "Fields", props: {} }
+      }
+    };
+
+    const registry: AdaptiveCardRegistry = {
+      Container: (element, children) => ({
+        type: "Container",
+        items: children
+      }),
+      Fields: () => [
+        { type: "Input.Text", id: "f1" },
+        { type: "Input.Text", id: "f2" }
+      ]
+    };
+
+    const result = renderAdaptiveCard(tree, registry);
+
+    expect(result).toMatchObject({
+      body: [
+        {
+          type: "Container",
+          items: [
+            { type: "Input.Text", id: "f1" },
+            { type: "Input.Text", id: "f2" }
+          ]
+        }
+      ]
+    });
+  });
+});
diff --git a/packages/adapters/adaptive-cards/src/index.ts b/packages/adapters/adaptive-cards/src/index.ts
new file mode 100644
index 0000000..1df7056
--- /dev/null
+++ b/packages/adapters/adaptive-cards/src/index.ts
@@ -0,0 +1,94 @@
+import { UIElement, UITree } from "@json-render/core";
+
+export type AdaptiveCardElement = Record<string, unknown>;
+
+export type AdaptiveCardNode = AdaptiveCardElement | AdaptiveCardElement[];
+
+export type AdaptiveCardComponent<P = any> = (
+  element: UIElement<string, P>,
+  children: AdaptiveCardElement[]
+) => AdaptiveCardNode;
+
+export type AdaptiveCardRegistry = Record<string, AdaptiveCardComponent>;
+
+export interface AdaptiveCardOptions {
+  version?: string;
+  fallbackText?: string;
+}
+
+function renderElement(
+  key: string,
+  tree: UITree,
+  registry: AdaptiveCardRegistry
+): AdaptiveCardElement[] {
+  const element = tree.elements[key];
+  if (!element) {
+    return [];
+  }
+
+  const component = registry[element.type];
+  if (!component) {
+    // If component is not found, return a warning TextBlock or just skip?
+    // Returning a warning is safer for debugging.
+    return [{
+      type: "TextBlock",
+      text: `[Unknown component: ${element.type}]`,
+      color: "Attention",
+      wrap: true
+    }];
+  }
+
+  // Recursively render children
+  const children: AdaptiveCardElement[] = [];
+  if (element.children) {
+    for (const childKey of element.children) {
+      children.push(...renderElement(childKey, tree, registry));
+    }
+  }
+
+  const result = component(element, children);
+  return Array.isArray(result) ? result : [result];
+}
+
+export function renderAdaptiveCard(
+  tree: UITree,
+  registry: AdaptiveCardRegistry,
+  options: AdaptiveCardOptions = {}
+): AdaptiveCardElement {
+  const rootElements = renderElement(tree.root, tree, registry);
+
+  const result: AdaptiveCardElement = {
+    type: "AdaptiveCard",
+    version: options.version || "1.5",
+    body: rootElements,
+  };
+
+  if (options.fallbackText !== undefined) {
+    result.fallbackText = options.fallbackText;
+  }
+
+  return result;
+}
+
+/**
+ * Helper to create an Action.Submit
+ */
+export function createActionSubmit(title: string, data: unknown): AdaptiveCardElement {
+  return {
+    type: "Action.Submit",
+    title,
+    data,
+  };
+}
+
+/**
+ * Helper to create an Action.Execute (for Adaptive Cards 1.4+)
+ */
+export function createActionExecute(title: string, verb: string, data: unknown): AdaptiveCardElement {
+  return {
+    type: "Action.Execute",
+    title,
+    verb,
+    data,
+  };
+}
diff --git a/packages/adapters/adaptive-cards/tsconfig.json b/packages/adapters/adaptive-cards/tsconfig.json
new file mode 100644
index 0000000..eb8e6c3
--- /dev/null
+++ b/packages/adapters/adaptive-cards/tsconfig.json
@@ -0,0 +1,8 @@
+{
+  "extends": "@repo/typescript-config/base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src"
+  },
+  "include": ["src/**/*"]
+}
diff --git a/packages/adapters/adaptive-cards/tsup.config.ts b/packages/adapters/adaptive-cards/tsup.config.ts
new file mode 100644
index 0000000..781ca50
--- /dev/null
+++ b/packages/adapters/adaptive-cards/tsup.config.ts
@@ -0,0 +1,9 @@
+import { defineConfig } from "tsup";
+
+export default defineConfig({
+  entry: ["src/index.ts"],
+  format: ["cjs", "esm"],
+  dts: true,
+  sourcemap: true,
+  clean: true,
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d5209e1..e148dce 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -188,6 +188,22 @@ importers:
         specifier: ^5.7.2
         version: 5.9.2
 
+  packages/adapters/adaptive-cards:
+    dependencies:
+      '@json-render/core':
+        specifier: workspace:*
+        version: link:../../core
+    devDependencies:
+      '@repo/typescript-config':
+        specifier: workspace:*
+        version: link:../../typescript-config
+      tsup:
+        specifier: ^8.0.2
+        version: 8.5.1(jiti@2.6.1)(postcss@8.5.6)(typescript@5.9.2)(yaml@2.8.2)
+      typescript:
+        specifier: ^5.4.5
+        version: 5.9.2
+
   packages/codegen:
     dependencies:
       '@json-render/core':
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 2994b8c..442047c 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -2,3 +2,4 @@ packages:
   - "apps/*"
   - "examples/*"
   - "packages/*"
+  - "packages/adapters/*"