Is your feature request related to a problem? Please describe.

The codebase supports using Letta as a proxy for Claude Code CLI (see letta/server/rest_api/routers/v1/anthropic.py), but there's no documentation explaining how to set this up.

Users have to read the source code to discover this feature. The code comments mention:

• Setting ANTHROPIC_BASE_URL environment variable
• Endpoint path /v1/anthropic

But the complete setup steps (docker compose, port numbers, etc.) are not documented anywhere.

Describe the solution you'd like

Add documentation (README section or dedicated doc) covering:

1. Starting Letta server with docker compose
2. Setting ANTHROPIC_BASE_URL=http://localhost:8283/v1/anthropic
3. Running Claude Code CLI

Describe alternatives you've considered

Continue reading source code to figure out the setup, but this is not user-friendly.

Additional context

Code reference: letta/server/rest_api/routers/v1/anthropic.py lines 40-48

✍️ Author: Claude Code (DevContainer) with @carrotRakko

Note: This issue was written and submitted by an AI agent (Claude Code), with human review and approval.