Git-Backed Memory Repos

Agents with the

git-memory-enabled

tag have their memory blocks stored in git repositories accessible via the Letta API. This enables version control, collaboration, and external editing of agent memory.

Features:

Stored in cloud (GCS)

Accessible via

$LETTA_BASE_URL/v1/git/<agent-id>/state.git

Bidirectional sync: API <-> Git (webhook-triggered, ~2-3s delay)
Structure:
```
memory/system/*.md
```
for system blocks

What the CLI Harness Does Automatically

When memfs is enabled, the Letta Code CLI automatically:

Adds the
```
git-memory-enabled
```
tag to the agent (triggers backend to create the git repo)
Clones the repo into
```
~/.letta/agents/<agent-id>/memory/
```
(git root is the memory directory)
Configures a local credential helper in
```
memory/.git/config
```
(so
```
git push
```
/
```
git pull
```
work without auth ceremony)
Installs a pre-commit hook that validates frontmatter before each commit (see below)
On subsequent startups: pulls latest changes, reconfigures credentials and hook (self-healing)
During sessions: periodically checks
```
git status
```
and reminds you (the agent) to commit/push if dirty

If any of these steps fail, you can replicate them manually using the sections below.

Authentication

The harness configures a per-repo credential helper during clone. To verify or reconfigure:

bash

cd ~/.letta/agents/<agent-id>/memory

# Check if configured
git config --get credential.$LETTA_BASE_URL.helper

# Reconfigure (e.g. after API key rotation)
git config credential.$LETTA_BASE_URL.helper \
  '!f() { echo "username=letta"; echo "password=$LETTA_API_KEY"; }; f'

For cloning a different agent's repo (e.g. during memory migration), set up a global helper:

bash

git config --global credential.$LETTA_BASE_URL.helper \
  '!f() { echo "username=letta"; echo "password=$LETTA_API_KEY"; }; f'

Pre-Commit Hook (Frontmatter Validation)

The harness installs a git pre-commit hook that validates

.md

files under

memory/

before each commit. This prevents pushes that the server would reject.

Rules:

Every
```
.md
```
file must have YAML frontmatter (
```
---
```
header and closing
```
---
```
)
Required fields:
```
description
```
(non-empty string),
```
limit
```
(positive integer)
```
read_only
```
is a protected field: you (the agent) cannot add, remove, or change it. Files with
```
read_only: true
```
cannot be modified at all. Only the server/user sets this field.
Unknown frontmatter keys are rejected

Valid file format:

markdown

---
description: What this block contains
limit: 20000
---

Block content goes here.

If the hook rejects a commit, read the error message — it tells you exactly which file and which rule was violated. Fix the file and retry.

Clone Agent Memory

bash

# Clone agent's memory repo
git clone "$LETTA_BASE_URL/v1/git/<agent-id>/state.git" ~/my-agent-memory

# View memory blocks
ls ~/my-agent-memory/memory/system/
cat ~/my-agent-memory/memory/system/human.md

Enabling Git Memory (Manual)

If the harness

/memfs enable

failed, you can replicate it:

bash

AGENT_ID="<your-agent-id>"
AGENT_DIR=~/.letta/agents/$AGENT_ID
MEMORY_REPO_DIR="$AGENT_DIR/memory"

# 1. Add git-memory-enabled tag (IMPORTANT: preserve existing tags!)
# First GET the agent to read current tags, then PATCH with the new tag appended.
# The harness code does: tags = [...existingTags, "git-memory-enabled"]
curl -X PATCH "$LETTA_BASE_URL/v1/agents/$AGENT_ID" \
  -H "Authorization: Bearer $LETTA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"tags": ["origin:letta-code", "git-memory-enabled"]}'

# 2. Clone the repo into memory/
mkdir -p "$MEMORY_REPO_DIR"
git clone "$LETTA_BASE_URL/v1/git/$AGENT_ID/state.git" "$MEMORY_REPO_DIR"

# 3. Configure local credential helper
cd "$MEMORY_REPO_DIR"
git config credential.$LETTA_BASE_URL.helper \
  '!f() { echo "username=letta"; echo "password=$LETTA_API_KEY"; }; f'

Bidirectional Sync

API Edit -> Git Pull

bash

# 1. Edit block via API (or use memory tools)
# 2. Pull to get changes (webhook creates commit automatically)
cd ~/.letta/agents/<agent-id>/memory
git pull

Changes made via the API are automatically committed to git within 2-3 seconds.

Git Push -> API Update

bash

cd ~/.letta/agents/<agent-id>/memory

# 1. Edit files locally
echo "Updated info" > system/human.md

# 2. Commit and push
git add system/human.md
git commit -m "fix: update human block"
git push

# 3. API automatically reflects changes (webhook-triggered, ~2-3s delay)

Conflict Resolution

When both API and git have diverged:

bash

cd ~/.letta/agents/<agent-id>/memory

# 1. Try to push (will be rejected)
git push  # -> "fetch first"

# 2. Pull to create merge conflict
git pull --no-rebase
# -> CONFLICT in system/human.md

# 3. View conflict markers
cat system/human.md
# <<<<<<< HEAD
# your local changes
# =======
# server changes
# >>>>>>> <commit>

# 4. Resolve
echo "final resolved content" > system/human.md
git add system/human.md
git commit -m "fix: resolved conflict in human block"

# 5. Push resolution
git push
# -> API automatically updates with resolved content

Block Management

Create New Block

bash

# Create file in system/ directory (automatically attached to agent)
echo "My new block content" > system/new-block.md
git add system/new-block.md
git commit -m "feat: add new block"
git push
# -> Block automatically created and attached to agent

Delete/Detach Block

bash

# Remove file from system/ directory
git rm system/persona.md
git commit -m "chore: remove persona block"
git push
# -> Block automatically detached from agent

Directory Structure

~/.letta/agents/<agent-id>/
├── .letta/
│   └── config.json              # Agent metadata
└── memory/                      # Git repo root
    ├── .git/                    # Git repo data
    └── system/                  # System blocks (attached to agent)
        ├── human.md
        └── persona.md

System blocks (

memory/system/

) are attached to the agent and appear in the agent's system prompt.

Requirements

Agent must have
```
git-memory-enabled
```
tag
Valid API key with agent access
Git installed locally

Troubleshooting

Clone fails with "Authentication failed":

Check credential helper:

git config --get credential.$LETTA_BASE_URL.helper

Reconfigure: see Authentication section above

Verify the endpoint is reachable:

curl -u letta:$LETTA_API_KEY $LETTA_BASE_URL/v1/git/<agent-id>/state.git/info/refs?service=git-upload-pack

Push/pull doesn't update API:

Wait 2-3 seconds for webhook processing
Verify agent has
```
git-memory-enabled
```
tag
Check if you have write access to the agent

Harness setup failed (no .git/ after /memfs enable):

Check debug logs (
```
LETTA_DEBUG=1
```
)
Follow "Enabling Git Memory (Manual)" steps above

Can't see changes immediately:

Bidirectional sync has a 2-3 second delay for webhook processing
Use
```
git pull
```
to get latest API changes
Use
```
git fetch
```
to check remote without merging

syncing-memory-filesystem

NPX Install

Tags

SKILL.md Content

Git-Backed Memory Repos

What the CLI Harness Does Automatically

Authentication

Pre-Commit Hook (Frontmatter Validation)

Clone Agent Memory

Enabling Git Memory (Manual)

Bidirectional Sync

API Edit -> Git Pull

Git Push -> API Update

Conflict Resolution

Block Management

Create New Block

Delete/Detach Block

Directory Structure

Requirements

Troubleshooting