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#1	---
#2	title: Persistent Eliza Characters
#3	description: "Bring persistent personality to Eliza OS agents using Mem0."
#4	---
#5
#6
#7	You can create a personalized Eliza OS Character using Mem0. This guide will walk you through the necessary steps and provide the complete code to get you started.
#8
#9	## Overview
#10
#11	ElizaOS is a powerful AI agent framework for autonomy and personality. It is a collection of tools that help you create a personalized AI agent.
#12
#13	## Setup
#14
#15	You can start by cloning the eliza-os repository:
#16
#17	```bash
#18	git clone https://github.com/elizaOS/eliza.git
#19	```
#20
#21	Change the directory to the eliza-os repository:
#22
#23	```bash
#24	cd eliza
#25	```
#26
#27	Install the dependencies:
#28
#29	```bash
#30	pnpm install
#31	```
#32
#33	Build the project:
#34
#35	```bash
#36	pnpm build
#37	```
#38
#39	## Setup ENVs
#40
#41	Create a `.env` file in the root of the project and add the following (you can use the `.env.example` file as a reference):
#42
#43	```bash
#44	# Mem0 Configuration
#45	MEM0_API_KEY= # Mem0 API Key (get from https://app.mem0.ai/dashboard/api-keys)
#46	MEM0_USER_ID= # Default: eliza-os-user
#47	MEM0_PROVIDER= # Default: openai
#48	MEM0_PROVIDER_API_KEY= # API Key for the provider (OpenAI, Anthropic, etc.)
#49	SMALL_MEM0_MODEL= # Default: gpt-4.1-nano
#50	MEDIUM_MEM0_MODEL= # Default: gpt-4o
#51	LARGE_MEM0_MODEL= # Default: gpt-4o
#52	```
#53
#54	## Make the default character use Mem0
#55
#56	By default, there is a character called `eliza` that uses the Ollama model. You can make this character use Mem0 by changing the config in the `agent/src/defaultCharacter.ts` file.
#57
#58	```ts
#59	modelProvider: ModelProviderName.MEM0,
#60	```
#61
#62	This will make the character use Mem0 to generate responses.
#63
#64	## Run the project
#65
#66	```bash
#67	pnpm start
#68	```
#69
#70	## Conclusion
#71
#72	You have now created a personalized Eliza OS Character using Mem0. You can now start interacting with the character by running the project and talking to the character.
#73
#74	This is a simple example of how to use Mem0 to create a personalized AI agent. You can use this as a starting point to create your own AI agent.
#75
#76	---
#77
#78	<CardGroup cols={2}>
#79	<Card title="Partition Memories by Entity" icon="layers" href="/cookbooks/essentials/entity-partitioning-playbook">
#80	Keep character personas isolated by tagging user, agent, and session identifiers.
#81	</Card>
#82	<Card title="AI Tutor with Mem0" icon="graduation-cap" href="/cookbooks/companions/ai-tutor">
#83	Build another type of personalized companion with memory capabilities.
#84	</Card>
#85	</CardGroup>
#86

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