on_query_completions.py

class TestListener(sublime_plugin.EventListener):
    def on_query_completions(self, view, prefix, locations):
        return ([
            sublime.CompletionItem(
                trigger="tmartin",

                annotation="OverrideAudit Author",
                completion="Terence Martin",

                completion_format=sublime.COMPLETION_FORMAT_TEXT,

                kind=(sublime.KIND_ID_AMBIGUOUS, "⬣", "Cool people to know")
            )
        ],
        sublime.INHIBIT_WORD_COMPLETIONS|sublime.INHIBIT_EXPLICIT_COMPLETIONS)