refactor: reorganize skill numbering, remove obsolete skills, rename shared libs

- Rename: 00→80 claude-settings-optimizer, 88→79 dintel-skill-update,
  92→81 mac-optimizer, 93→82 tui-design-template
- Rename: dintel-shared → _dintel-shared (consistent with _ourdigital-shared)
- Remove: 61-gtm-manager, 62-gtm-guardian (obsolete), 99_archive
- Update all dintel-* skill refs (114 occurrences across 31 files)
- Sync README.md, CLAUDE.md, AGENTS.md with new structure

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

custom-skills/79-dintel-skill-update/code/CLAUDE.md

@@ -0,0 +1,66 @@
+# D.intelligence Skill Update Meta-Agent
+
+Cross-skill consistency management for the D.intelligence Agent Corps.
+
+## Quick Reference
+
+- **Agent**: #88 dintel-skill-update
+- **Autonomy**: Triggered (Andrew invokes explicitly)
+- **Purpose**: Propagate changes across all dintel- skills when shared references change
+
+## Shared References (Source of Truth)
+
+```
+_dintel-shared/
+├── src/dintel/
+│   ├── brand.py       # Service modules, client codes, colors, prohibited words
+│   ├── notion.py      # DB IDs, status options, field definitions
+│   ├── document.py    # DOCX utilities
+│   └── excel.py       # Excel utilities
+└── references/
+    ├── dintelligence_brand_guide.md
+    ├── notion-schema-reference.md
+    ├── pricing-reference.md
+    └── design-system-2025.md
+```
+
+## Skill-Level Shared Libraries
+
+Each skill also maintains local `shared/` with Source File copies:
+
+| Skill | `shared/` Contents |
+|-------|-------------------|
+| #72 Doc Secretary | `document-templates/` — 6 report/audit TXT templates |
+| #73 Quotation Mgr | `quotation-templates/` — 4 XLSX quotation templates |
+| #74 Service Architect | `service-modules/` — 4 CSVs (specs, keywords, audience, value props) |
+| #75 Marketing Mgr | `training-materials/` — GA4-GTM 실무가이드 |
+| #76 Back Office | `document-templates/` — 5 contract/invoice TXT templates |
+
+## Dependency Quick Map
+
+| Change | Update These Skills |
+|--------|-------------------|
+| Pricing | #73, #74, #76 |
+| Brand Guide | #70, #71, #72, #75 |
+| Service Modules | #70, #71, #73, #74, #75 |
+| Notion Schema | #72, #76, #77 |
+| Client Codes | #72, #73, #76, #77 |
+| Prohibited Words | #70, #71, #75 |
+
+## Workflow
+
+1. Andrew describes change
+2. Look up Dependency Map → list affected skills
+3. Present Impact Report → wait for approval
+4. Update `_dintel-shared/` first (source of truth)
+5. Propagate to each affected skill
+6. Run consistency verification
+7. Log to `shared/change-log.md`
+
+## Rules
+
+- Never execute without Andrew's approval
+- Update source of truth FIRST, then propagate
+- One change type at a time
+- Always log changes
+- Verify consistency after every update