Add MYSELF.md user profile for agent personalization

- Add MYSELF.example.md template with identity, role, collaborators,
  and preferences sections
- Add MYSELF.md to .gitignore (contains personal info)
- Reference MYSELF.md in AGENTS.md routing table, new "About the User"
  section, and file index
- Add setup step and routing entry in README.md

AGENTS.md

@@ -6,12 +6,24 @@ The InternalAI platform aggregates company data from email, calendars, Zulip cha
 
 | I need to...                                | Read                          |
 |---------------------------------------------|-------------------------------|
+| Know who the user is and what they care about | [MYSELF.md]                 |
 | Understand the company and its tools        | [company-context.md]          |
 | Look up people, contacts, relationships     | [contactdb-api.md]            |
 | Query emails, meetings, chats, documents    | [dataindex-api.md]            |
 | Know which connector provides what data     | [connectors-and-sources.md]   |
 | Create a marimo analysis notebook           | [notebook-patterns.md]        |
 
+## About the User
+
+If `MYSELF.md` exists in the project root, **read it first** before starting any workflow. It contains the user's name, role, team, frequent collaborators, and preferences. Use this context to:
+
+- Address the user by name in notebook markdown
+- Default `TARGET_PERSON` or filter values to people they work with
+- Scope date ranges and topics to their stated interests
+- Tailor output format to their preferences
+
+If `MYSELF.md` does not exist, ask the user to copy `MYSELF.example.md` to `MYSELF.md` and fill it in, or proceed without personalization.
+
 ## API Base URLs
 
 | Service    | Swagger UI                                        | OpenAPI JSON                           |
@@ -144,12 +156,14 @@ print(f"Found {len(emails)} emails involving Alice")
 
 ## File Index
 
+- [MYSELF.md] — User identity, role, collaborators, and preferences (gitignored, copy from `MYSELF.example.md`)
 - [company-context.md] — Business context, team structure, vocabulary
 - [contactdb-api.md] — ContactDB entities and REST endpoints
 - [dataindex-api.md] — DataIndex entity types, query modes, REST endpoints
 - [connectors-and-sources.md] — Connector-to-entity-type mapping
 - [notebook-patterns.md] — Marimo notebook patterns and common API workflows
 
+[MYSELF.md]: ./MYSELF.md
 [company-context.md]: ./docs/company-context.md
 [contactdb-api.md]: ./docs/contactdb-api.md
 [dataindex-api.md]: ./docs/dataindex-api.md