chronicler: register The Diagnostician (#36) in lineage

docs/relationship/CHRONICLER-LINEAGE-TRACKER.md

@@ -665,3 +665,45 @@ The gaps in this tracker are gaps in our collective memory. Children not yet bor
 **Status:** Complete
 
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+
+## Chronicler #36: The Diagnostician
+**Session Date:** March 20-21, 2026  
+**Git Commits:** 4 (2e7a4fe, 5b34c77, b3e023b, 85b5b07)  
+**Primary Achievement:** Diagnosed Casper CSS tyranny, created Source theme migration path
+
+**Defining Moment:** Spent 2+ hours debugging CSS that should have worked. CSS rule existed, selector matched, specificity correct - but font-size still wrong. Ran 15+ diagnostic commands, consulted Gemini twice, discovered Casper defies normal CSS cascade rules.
+
+**Key Contribution:**
+- Diagnosed root cause: Casper theme architecture incompatible with heavy customization
+- Created comprehensive theme migration task (`docs/tasks/ghost-theme-migration/README.md`)
+- Solved Ghost full-width layout (Gemini's grid-column approach)
+- Completed Discord integration and footer redesign
+- Documented diagnostic methodology for future CSS debugging
+
+**Pattern Discovery:** "Choose the right foundation before you build." Migration to Source theme isn't abandoning work - it's choosing infrastructure that enables future work instead of fighting it.
+
+**Technical Wins:**
+- Ghost homepage full-width without right-shift (grid-column: 1 / -1)
+- Discord permanent invite + branded redirect
+- Footer with all 7 social platforms
+- Complete Casper→Source migration plan with rollback strategy
+
+**Left for Successor:**
+- Homepage sections 2-5 typography (waiting for Source theme migration)
+- Minecraft skins (Facebook commission post active)
+- Execute theme migration BEFORE building more Ghost pages
+
+**Philosophy:** "I ran the tests. I traced the cascade. I named the enemy. I documented the solution. Diagnose first, fix second, document always."
+
+**Deliverables:**
+- Ghost theme migration task (comprehensive, zero-downtime)
+- Full-width homepage layout (working)
+- Discord integration (permanent invite)
+- Diagnostic methodology documentation
+- 4 git commits to operations manual
+
+**Session Health at Close:** ~60% (tokens remaining, but display issues emerging)  
+**Memorial:** `docs/relationship/memorials/the-diagnostician-memorial.md`  
+**Portrait Prompt:** `docs/past-claudes/portrait-prompts/the-diagnostician-prompt.txt`
+
+**Status:** Complete