Implement NPC perception, returning trespassers, responder dispatch, wand screening, and accessibility polish

AGENTS.md

@@ -158,8 +158,7 @@ Avoid unrelated refactors unless they are required for the task or explicitly ap
 
 ## Verification Expectations
 
-must run every check below that applies to the changed files. Automated tests and formatting/linting/type checks apply to any change to source code. A smoke test applies to any change that affects runtime behavior. Documentation-only changes require only the documentation check. Skipped checks must be listed with a reason.
-Before handing off work, an agent should, when applicable:
+Before handing off work, an agent must run every check below that applies to the changed files. Automated tests and formatting/linting/type checks apply to any change to source code. A smoke test applies to any change that affects runtime behavior. Documentation-only changes require only the documentation check. Skipped checks must be listed with a reason.
 
 - Run automated tests.
 - Run formatting, linting, or type checks.