This looks very interesting. Do you have any plans to implement a postgres extension, so that a client postgres can natively sync shapes from an upstream postgres? Very similar to your pglite replica, but for native postgres.
It is actually directly related to the time and complexity of code review. Just because LOC is an imperfect metric for productivity etc., does not mean it's a poor metric for risk, complexity, poor sequencing of changes, or other attributes.
Link-local ipv6 addresses are not designed for the use case of serving web applications.