Scope Control by Ron Newcomb begins here.

"Allows us to ask why the Deciding the Scope For Something activity is running, so we can modify the scope only when we absolutely need to. Highly useful for giving NPCs commands over telephones or while in darkness, creating 'can hear' relations, or modifying how Inform parses the command line."

• Section 1 - Scope Control extension
• Section 2 - really only useful for testing scope control - not for release - unindexed