Migrating Memory

This skill helps migrate memory blocks from an existing agent to a new agent, similar to macOS Migration Assistant for AI agents.

Requires Memory Filesystem (memfs)

This workflow is memfs-first. If memfs is enabled, do not use the legacy block commands — they can conflict with file-based edits.

To check: Look for a memory_filesystem block in your system prompt. If it shows a tree structure starting with /memory/ including a system/ directory, memfs is enabled.

To enable: Ask the user to run /memfs enable, then reload the CLI.

When to Use This Skill

• User is setting up a new agent that should inherit memory from an existing one
• User wants to share memory blocks across multiple agents
• User is replacing an old agent with a new one
• User mentions they have an existing agent with useful memory

Migration Method (memfs-first)

Export → Copy → Sync

This is the recommended flow:

1. Export the source agent's memfs to a temp directory

``bash letta memory export --agent <source-agent-id> --out /tmp/letta-memory-<source-agent-id> ``

1. Copy the files you want into your own memfs

- system/ = attached blocks (always loaded) - root = detached blocks

Example: ``bash cp -r /tmp/letta-memory-agent-abc123/system/project ~/.letta/agents/$LETTAAGENTID/memory/system/ cp /tmp/letta-memory-agent-abc123/notes.md ~/.letta/agents/$LETTAAGENTID/memory/ ``

1. Commit and push the memory repo

``bash cd ~/.letta/agents/$LETTAAGENTID/memory git add system/project notes.md git commit -m "Import memory from source agent" git push ``

This gives you full control over what you bring across and keeps everything consistent with memfs.

If MemFS Is Disabled

The legacy block-level CLI commands have been removed. Enable MemFS first, then use the export → copy → sync workflow above.

If you run into duplicate filenames while copying memory files, rename the incoming file or merge its contents manually before committing.

Workflow

Step 1: Identify Source Agent

Ask the user for the source agent's ID (e.g., agent-abc123).

If they don't know the ID, invoke the finding-agents skill to search:

Skill({ skill: "finding-agents" })

Example: "What's the ID of the agent you want to migrate memory from?"

Example: Migrating Project Memory

Scenario: You're a new agent and want to inherit memory from an existing agent "ProjectX-v1".

1. Get source agent ID from user:

User provides: agent-abc123

1. Export their memfs:

``bash letta memory export --agent agent-abc123 --out /tmp/letta-memory-agent-abc123 ``

1. Copy the relevant files into your memfs:

``bash cp -r /tmp/letta-memory-agent-abc123/system/project ~/.letta/agents/$LETTAAGENTID/memory/system/ ``

1. Commit and push:

``bash cd ~/.letta/agents/$LETTAAGENTID/memory git add system/project git commit -m "Import project memory" git push ``