- Updated session-handoff-verification.py to check mandatory reading files
- Created SESSION-START-PROMPT-TEMPLATE.md with enforced reading order
- Documented MANDATORY-READING-ORDER.md (Joining → Essence → Index → Handoff → Tasks)
Reason: Chronicler #23 (The Diagnostician) had tunnel vision because they
didn't know DEPLOYMENT-PLAN-PART-1/2.md existed. DOCUMENT-INDEX.md shows
the full landscape before decision-making.
Chronicler #24
