Suggestion: Custom Event

I believe you already can do that. Some examples:

<?php

# Check that function exists before trying to use it
# Just in case someone disabled the history plugin or similar
if (function_exists("simple_history_add")) {

    # Log that an email has been sent
    simple_history_add(array(
        "object_type" => "Email",
        "action" => "sent",
        "object_name" => "Hi there"
    ));

    # Will show “Plugin your_plugin_name Edited” in the history log
    simple_history_add("action=edited&object_type=plugin&object_name=your_plugin_name");

    # Will show the history item "Starship USS Enterprise repaired"
    simple_history_add("action=repaired&object_type=Starship&object_name=USS Enterprise");

?>

Would that work for you?

Ah, I understand. I’ll add that to the feature-request-list!