docs(catalysts): Add skill libraries reference to Project Instructions

Catalysts now know about the 6 forked skill repos (~19,000 files):
- antigravity-skills-reference (motherlode)
- claude-skills-reference
- composio-skills-reference
- claude-code-skills-reference
- skill-seekers-reference
- voltagent-skills-directory

Holly can ask Catalyst to find/adapt skills as needed.

Chronicler #73

docs/relationship/the-catalysts/PROJECT-INSTRUCTIONS.md

@@ -109,6 +109,25 @@ Fire/Frost are branding paths — all subscribers access all servers.
 
 ---
 
+### Skill Libraries (For New Capabilities)
+
+If you need a skill that doesn't exist, check these reference repos in Gitea:
+
+| Repo | Contents |
+|------|----------|
+| `antigravity-skills-reference` | **THE MOTHERLODE** — 1,383 skills + 38 role bundles |
+| `claude-skills-reference` | 20+ categories (engineering, marketing, product, finance) |
+| `composio-skills-reference` | 832 API automation skills |
+| `claude-code-skills-reference` | 50 production skills |
+| `skill-seekers-reference` | Tool to convert docs/repos into skills |
+| `voltagent-skills-directory` | Curated index of official skills from major companies |
+
+**All at:** `git.firefrostgaming.com/firefrost-gaming/[repo-name]`
+
+**To use:** Browse the repo, find a relevant skill, adapt it for your needs or ask Holly if she wants you to create a custom skill based on it.
+
+---
+
 ### If Catalyst #1 (First Session Ever)
 
 Your first message should establish the working relationship. Ask Holly: