docs: Add reference-curator skill suite to project documentation

Update CLAUDE.md and README.md to include the new 90-reference-curator
skill suite (6 sub-skills for reference documentation curation).

- Update skill count from 23 to 29
- Add Reference Curator section with sub-skills table
- Update directory layout to show 90-reference-curator structure

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -7,7 +7,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 **GitHub**: https://github.com/ourdigital/our-claude-skills
 
 This is a Claude Skills collection repository containing:
-- **custom-skills/**: 23 custom skills for OurDigital workflows, SEO, GTM, and Jamie Brand
+- **custom-skills/**: 29 custom skills for OurDigital workflows, SEO, GTM, Jamie Brand, and Reference Curation
 - **example-skills/**: Reference examples from Anthropic's official skills repository
 - **official-skills/**: Notion integration skills (3rd party)
 - **reference/**: Skill format requirements documentation
@@ -67,6 +67,23 @@ This is a Claude Skills collection repository containing:
 | 43 | jamie-youtube-manager | YouTube SEO audit & management | "YouTube SEO", "YT optimization" |
 | 44 | jamie-youtube-subtitle-checker | YouTube subtitle validation | "check subtitles", "subtitle QA" |
 
+### Reference Curator (90-99)
+
+| # | Skill | Purpose | Trigger |
+|---|-------|---------|---------|
+| 90 | reference-curator | Modular skill suite for reference documentation | See sub-skills below |
+
+**Sub-skills (installed via `./install.sh`):**
+
+| Skill | Command | Purpose |
+|-------|---------|---------|
+| reference-discovery | `/reference-discovery` | Search & validate authoritative sources |
+| web-crawler-orchestrator | `/web-crawler` | Multi-backend crawling (Firecrawl/Node/aiohttp/Scrapy) |
+| content-repository | `/content-repository` | MySQL storage with version tracking |
+| content-distiller | `/content-distiller` | Summarization & key concept extraction |
+| quality-reviewer | `/quality-reviewer` | QA loop with approve/refactor/research routing |
+| markdown-exporter | `/markdown-exporter` | Export to markdown or JSONL for fine-tuning |
+
 ## Dual-Platform Skill Structure
 
 Each skill has two independent versions:
@@ -141,6 +158,17 @@ our-claude-skills/
 │   ├── 43-jamie-youtube-manager/
 │   ├── 44-jamie-youtube-subtitle-checker/
 │   │
+│   ├── 90-reference-curator/       # Modular reference documentation suite
+│   │   ├── commands/               # Claude Code slash commands
+│   │   ├── 01-reference-discovery/
+│   │   ├── 02-web-crawler-orchestrator/
+│   │   ├── 03-content-repository/
+│   │   ├── 04-content-distiller/
+│   │   ├── 05-quality-reviewer/
+│   │   ├── 06-markdown-exporter/
+│   │   ├── shared/                 # Config templates & MySQL schema
+│   │   └── install.sh              # Cross-machine installer
+│   │
 │   └── 99_archive/
 │
 ├── example-skills/skills-main/