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Update contributing.md with corrected local setup steps (#3123)

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neversettle
2026-01-01 01:54:14 +05:30
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CONTRIBUTING.md
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@@ -21,6 +21,40 @@ git clone https://github.com/your-username/letta.git
### 🧩 Install dependencies & configure environment
This project requires **PostgreSQL** to be installed and running on your system. Assuming you have a running PostgreSQL instance, first you need to create the user, database and ensure the pgvector
extension is ready. Here are sample steps for a case where user and database name is letta and assumes no password is set:
#### 1. Enter the PostgreSQL Shell
Open your terminal (or Command Prompt on Windows) and run:
```bash
# On Mac/Linux:
sudo -u postgres psql
# On Windows:
psql -U postgres
```
#### 2. Run Setup Commands
Once inside the PostgreSQL prompt (you will see `postgres=#`), run the following SQL block:
```sql
-- 1. Create a dedicated role with login and superuser permissions
CREATE ROLE letta WITH LOGIN SUPERUSER PASSWORD 'letta';
-- 2. Create the database and assign 'letta' as the owner
CREATE DATABASE letta OWNER letta;
-- 3. Switch connection to the new 'letta' database
\c letta
-- 4. Enable the pgvector extension for vector embeddings
CREATE EXTENSION IF NOT EXISTS vector;
Setup the environment variable to tell letta code to contact PostgreSQL database:
```shell
export LETTA_PG_URI="postgresql://${POSTGRES_USER:-letta}:${POSTGRES_PASSWORD:-letta}@localhost:5432/${POSTGRES_DB:-letta}"
```
#### Install uv and dependencies
First, install uv using [the official instructions here](https://docs.astral.sh/uv/getting-started/installation/).
@@ -31,24 +65,7 @@ cd letta
eval $(uv env activate)
uv sync --all-extras
```
#### Setup PostgreSQL environment (optional)
If you are planning to develop letta connected to PostgreSQL database, you need to take the following actions.
If you are not planning to use PostgreSQL database, you can skip to the step which talks about [running letta](#running-letta-with-uv).
Assuming you have a running PostgreSQL instance, first you need to create the user, database and ensure the pgvector
extension is ready. Here are sample steps for a case where user and database name is letta and assumes no password is set:
```shell
createuser letta
createdb letta --owner=letta
psql -d letta -c 'CREATE EXTENSION IF NOT EXISTS vector'
```
Setup the environment variable to tell letta code to contact PostgreSQL database:
```shell
export LETTA_PG_URI="postgresql://${POSTGRES_USER:-letta}:${POSTGRES_PASSWORD:-letta}@localhost:5432/${POSTGRES_DB:-letta}"
```
```
After this you need to prep the database with initial content. You can use alembic upgrade to populate the initial
contents from template test data.
```shell
@@ -59,7 +76,7 @@ uv run alembic upgrade head
Now when you want to use `letta`, you can use `uv run` to run any letta command:
```shell
uv run letta run
uv run letta server
```
#### Installing pre-commit