chore(main): release 0.2.0

Author: a2a-bot

CHANGELOG.md

@@ -1,5 +1,21 @@
 # Changelog
 
+## [0.2.0](https://github.com/google-agentic-commerce/AP2/compare/v0.1.0...v0.2.0) (2025-12-15)
+
+
+### Features
+
+* Add Vertex AI authentication support alongside Google API key ([#48](https://github.com/google-agentic-commerce/AP2/issues/48)) ([f3b4ab9](https://github.com/google-agentic-commerce/AP2/commit/f3b4ab97b2c90c4e546b6e7ceeea42dff25c1dd8))
+* Add X402 payment method support to Python human-in-the-loop samples ([#121](https://github.com/google-agentic-commerce/AP2/issues/121)) ([7f953cf](https://github.com/google-agentic-commerce/AP2/commit/7f953cf7dc619331008a5f4086ef50aa0e0f3115))
+* **go:** introduce standalone sample ([#101](https://github.com/google-agentic-commerce/AP2/issues/101)) ([c3a3876](https://github.com/google-agentic-commerce/AP2/commit/c3a387607e8adf7d375a53b77d9cbbdc0e4640f5))
+* **receipt:** Implement PaymentReceipt ([#110](https://github.com/google-agentic-commerce/AP2/issues/110)) ([316e32e](https://github.com/google-agentic-commerce/AP2/commit/316e32e65d6b7e64a6a8ae724143422a1172dd53))
+
+
+### Bug Fixes
+
+* add cross-platform support for virtual environment activation ([#85](https://github.com/google-agentic-commerce/AP2/issues/85)) ([eef5ca5](https://github.com/google-agentic-commerce/AP2/commit/eef5ca51e81559474617301866aaa714b1072d8a))
+* **shopping:** Correct numbering in shopper agent instructions ([#26](https://github.com/google-agentic-commerce/AP2/issues/26)) ([ed4185f](https://github.com/google-agentic-commerce/AP2/commit/ed4185f03ed56dee4993e30067daf33cfa200303))
+
 ## 0.1.0 (2025-09-16)