feat: add self-onboarding skill to AGENTS.md

AGENTS.md

@@ -15,6 +15,7 @@ As an agent, assume you're running within our greywall sandbox.
 | Know which connector provides what data     | [connectors skill]                                |
 | Create a marimo analysis notebook           | [workflow skill] + [notebook-patterns skill]      |
 | Build a weekly checkout                     | [checkout skill]                                  |
+| Create my MYSELF.md from historical data    | [self-onboarding skill]                           |
 
 ## About the User
 
@@ -64,6 +65,7 @@ Use this table to translate natural language questions into API calls. The base
 - [workflow skill] — How to create marimo analysis notebooks
 - [notebook-patterns skill] — Marimo notebook patterns and common API workflows
 - [checkout skill] — Weekly review builder
+- [self-onboarding skill] — Generate a personalized MYSELF.md from 12 months of historical activity
 
 [MYSELF.md]: ./MYSELF.md
 [company skill]: ./.agents/skills/company/SKILL.md
@@ -73,3 +75,4 @@ Use this table to translate natural language questions into API calls. The base
 [workflow skill]: ./.agents/skills/workflow/SKILL.md
 [notebook-patterns skill]: ./.agents/skills/notebook-patterns/SKILL.md
 [checkout skill]: ./.agents/skills/checkout/SKILL.md
+[self-onboarding skill]: ./.agents/skills/self-onboarding/SKILL.md