Welcome to the Home of ESAPI 3.x
The development of ESAPI 3 is still within the very early planning stages. The code that is currently in this GitHub repo (as of 2020-07-17) is likely to be completely rewritten, possibly several times. If you wish to participate, please sign up for the Google Group "esapi-project-dev", and feel free to start a new discussion thread. Note you MUST subscribe to the Google Group list before you may POST to it. Subscribe to ESAPI Developers list.
For more information on ESAPI or information on ESAPI 2.x please visit our wiki page at https://owasp.org/www-project-enterprise-security-api/ and before you start using ESAPI, do yourself a favor and be sure to read the "Should I use ESAPI?" tab there.