Server log format

Is there any documentation of the server’s log message format?

Like this:

INFO  org.languagetool.server.TextChecker Check done: 45 chars, en-GB, #245, null, 0 matches, 60ms, agent:java-http-client, sent, q:0, h:1, dH:1, m:textlevel_only

I don’t think there’s documentation (other than the source code). Most values are internal values only useful for debugging. 60ms is the time it took the check the text, en-GB is the language.

What do

m:textlevel_only
m:all_but_textlevel_only

refer to?

It’s the type of request sent by some add-ons (e.g. browser add-on). That parameter is not part of the official API (LanguageTool HTTP API).