Kill-Switch: Refuse DM processing when dm_reply.enabled=false in config.
Root cause: checked nonexistent 'disable_ai_messaging' flag instead of
actual plugin config.
Context Guard: Skip threads with no extractable message text.
Root cause: LLM was fed 'No previous context' → produced garbage like
'the to the'.
Send Verification: Structurally verify Send button resource-id/desc.
Root cause: VLM returned reactions_pill_container, edit fields, etc.
and engine blindly clicked them, logging 'Successfully sent'.
Iteration Cap: MAX_REPLIES_PER_INBOX_VISIT=3 prevents spam.
Root cause: no loop guard → 8 DMs sent in 2 minutes in production.
Refactored: removed dead 'if True' guard, de-indented block,
moved dm_memory.log_sent_dm into success branch only.
All 6 E2E tests pass. No regressions (54/55 passed, 1 pre-existing).
Marc Mintel
c051c3a4c3