tink-crypto/tink ? reverse-engineered prompt

Build me a small but polished cryptography library inspired by Tink, with simple APIs that make the safe thing the easy thing. I want it to cover common needs like authenticated encryption, key generation, signing, and key rotation, with a clean developer friendly interface and good defaults so people do not have to be crypto experts to use it correctly.

Please include a few working examples for Java and Python, and if it is reasonable, add support for one or two other languages as stubs or basic ports. Make the docs beginner friendly, with clear getting started steps and short examples that show how to encrypt, decrypt, sign, and verify data. Focus on security, correctness, and tests, and make sure the code is organized so it is easy to extend later. If you need to check current best practices or APIs, look them up online first.