Migration Guide: Upgrading to mem0 1.0.0

TL;DR

What changed? We simplified the API by removing confusing version parameters. Now everything returns a consistent format: {"results": [...]}.

What you need to do:

Upgrade: pip install mem0ai==1.0.0
Remove version and output_format parameters from your code
Update response handling to use result["results"] instead of treating responses as lists

Time needed: ~5-10 minutes for most projects

Quick Migration Guide

1. Install the Update

bash

pip install mem0ai==1.0.0

2. Update Your Code

If you're using the Memory API:

python

# Before
memory = Memory(config=MemoryConfig(version="v1.1"))
result = memory.add("I like pizza")

# After
memory = Memory()  # That's it - version is automatic now
result = memory.add("I like pizza")

If you're using the Client API:

python

# Before
client.add(messages, output_format="v1.1")
client.search(query, version="v2", output_format="v1.1")

# After
client.add(messages)  # Just remove those extra parameters
client.search(query)

3. Update How You Handle Responses

All responses now use the same format: a dictionary with "results" key.

python

# Before - you might have done this
result = memory.add("I like pizza")
for item in result:  # Treating it as a list
    print(item)

# After - do this instead
result = memory.add("I like pizza")
for item in result["results"]:  # Access the results key
    print(item)

# Graph relations (if you use them)
if "relations" in result:
    for relation in result["relations"]:
        print(relation)

Enhanced Message Handling

The platform client (MemoryClient) now supports the same flexible message formats as the OSS version:

python

from mem0 import MemoryClient

client = MemoryClient(api_key="your-key")

# All three formats now work:

# 1. Single string (automatically converted to user message)
client.add("I like pizza", user_id="alice")

# 2. Single message dictionary
client.add({"role": "user", "content": "I like pizza"}, user_id="alice")

# 3. List of messages (conversation)
client.add([
    {"role": "user", "content": "I like pizza"},
    {"role": "assistant", "content": "I'll remember that!"}
], user_id="alice")

Async Mode Configuration

The async_mode parameter now defaults to True but can be configured:

python

# Default behavior (async_mode=True)
client.add(messages, user_id="alice")

# Explicitly set async mode
client.add(messages, user_id="alice", async_mode=True)

# Disable async mode if needed
client.add(messages, user_id="alice", async_mode=False)

Note: async_mode=True provides better performance for most use cases. Only set it to False if you have specific synchronous processing requirements.

That's It!

For most users, that's all you need to know. The changes are:

✅ No more version or output_format parameters
✅ Consistent {"results": [...]} response format
✅ Cleaner, simpler API

Common Issues

Getting KeyError: 'results'?

Your code is still treating the response as a list. Update it:

python

# Change this:
for memory in response:

# To this:
for memory in response["results"]:

Getting TypeError: unexpected keyword argument?

You're still passing old parameters. Remove them:

python

# Change this:
client.add(messages, output_format="v1.1")

# To this:
client.add(messages)

Seeing deprecation warnings?

Remove any explicit version="v1.0" from your config:

python

# Change this:
memory = Memory(config=MemoryConfig(version="v1.0"))

# To this:
memory = Memory()

What's New in 1.0.0

Better vector stores: Fixed OpenSearch and improved reliability across all stores
Cleaner API: One way to do things, no more confusing options
Enhanced GCP support: Better Vertex AI configuration options
Flexible message input: Platform client now accepts strings, dicts, and lists (aligned with OSS)
Configurable async_mode: Now defaults to True but users can override if needed

Need Help?

Check GitHub Issues
Read the documentation
Open a new issue if you're stuck

Advanced: Configuration Changes

If you configured vector stores with version:

python

# Before
config = MemoryConfig(
    version="v1.1",
    vector_store=VectorStoreConfig(...)
)

# After
config = MemoryConfig(
    vector_store=VectorStoreConfig(...)
)

Testing Your Migration

Quick sanity check:

python

from mem0 import Memory

memory = Memory()

# Add should return a dict with "results"
result = memory.add("I like pizza", user_id="test")
assert "results" in result

# Search should return a dict with "results"
search = memory.search("food", user_id="test")
assert "results" in search

# Get all should return a dict with "results"
all_memories = memory.get_all(user_id="test")
assert "results" in all_memories

print("✅ Migration successful!")