Update CONTRIBUTING.md

Author: sl0thentr0py

CONTRIBUTING.md

@@ -74,38 +74,62 @@ On macOS, we recommend using `brew` to install Python. For Windows, we recommend
 
 Before you can contribute, you will need to [fork the `sentry-python` repository](https://github.com/getsentry/sentry-python/fork). Then, clone the forked repository to your local development environment.
 
-### Create a Virtual Environment
+
+### Development Tooling
 
 We use [uv](https://docs.astral.sh/uv/) to manage the project's virtual environment and dev dependencies. Install uv following the [official instructions](https://docs.astral.sh/uv/getting-started/installation/), then run:
 
 ```bash
 cd sentry-python
-
 uv sync
 ```
 
-This creates a `uv` managed `.venv` (using the Python version pinned in `.python-version`) and installs the project's dev dependencies (tox, tox-uv, etc.) into it. It is recommended not to deal with this `.venv` manually but only through `uv`.
-
 Invoke commands via `uv run <cmd>` (e.g. `uv run tox -e py3.14-common`).
 
-### Install `sentry-python` in Editable Mode
+#### Linting / Formatting
 
-Install `sentry-python` in [editable mode](https://pip.pypa.io/en/latest/topics/local-project-installs/#editable-installs). This will make any changes you make to the SDK code locally immediately effective without you having to reinstall or copy anything.
+We use `ruff` to lint and format our code. Use the following commands:
 
-```bash
-pip install -e .
+```
+uv run ruff check --fix tests sentry_sdk
+uv run ruff format tests sentry_sdk
 ```
 
-**Hint:** Sometimes you need a sample project to run your new changes to `sentry-python`. In this case install the sample project in the same virtualenv and you should be good to go.
+#### Typing
+
+We use `mypy` for typing our codebase. Use the following command to typecheck the source:
 
-### Install Coding Style Pre-commit Hooks
+```
+uv run --group typing mypy sentry_sdk 
+```
+
+##### Install Coding Style Pre-commit Hooks
 
 `pre-commit` is included in the project's dev dependencies (installed by `uv sync`). Register the git hooks with:
 
 ```bash
 uv run pre-commit install
 ```
 
+Now, pre-commit will automatically lint your changes with `ruff`.
+
+
+### Install `sentry-python` in Editable Mode
+
+Install `sentry-python` in [editable mode](https://pip.pypa.io/en/latest/topics/local-project-installs/#editable-installs). This will make any changes you make to the SDK code locally immediately effective without you having to reinstall or copy anything.
+
+```bash
+pip install -e .
+```
+
+or
+
+```bash
+uv add --editable .
+```
+
+**Hint:** Sometimes you need a sample project to run your new changes to `sentry-python`. In this case install the sample project in the same virtualenv and you should be good to go.
+
 That's it. You should be ready to make changes, run tests, and make commits! If you experience any problems, please don't hesitate to ping us in our [Discord Community](https://discord.com/invite/Ww9hbqr).
 
 ## Running Tests