inline has a parameter archive which enables displaying metadata about matching pages (title, date) rather than their full contents. This does not influence the content of any generated feeds: they always include the full content.

There should be a way to elide the content of inlined pages in generated feeds, either by doing so when archive=yes is set (potentially changing the behaviour of existing deployments, but less configuration cruft) or adding yet further configuration options to inline.

use-case: I want to generate a (semi-private) feed of every blog post I have ever written, both on my live site and on my test one, so I can compare the publication dates. (some blog posts have dates fixed by meta directives; other rely on the file ctime, which is not preserved in the parent git repositories.) — Jon, 2020-04-27