feat: add galileo to integrations page (#4130)

* feat: add galileo to integrations page

* fix: linting issues

* fix: clarification on hanlder

* fix: uv install, load_dotenv redundancy, spelling error

* add: translations fix uv install and typo

* fix: broken links

---------

Co-authored-by: Anais <anais@Anaiss-MacBook-Pro.local>
Co-authored-by: Lorenze Jay <63378463+lorenzejay@users.noreply.github.com>
Co-authored-by: Anais <anais@Mac.lan>

docs/en/observability/galileo.mdx

@@ -0,0 +1,115 @@
+---
+title: Galileo
+description: Galileo integration for CrewAI tracing and evaluation
+icon: telescope
+mode: "wide"
+---
+
+## Overview
+
+This guide demonstrates how to integrate **Galileo** with **CrewAI**
+for comprehensive tracing and Evaluation Engineering.
+By the end of this guide, you will be able to trace your CrewAI agents,
+monitor their performance, and evaluate their behaviour with
+Galileo's powerful observability platform.
+
+> **What is Galileo?** [Galileo](https://galileo.ai) is AI evaluation and observability
+platform that delivers end-to-end tracing, evaluation,
+and monitoring for AI applications. It enables teams to capture ground truth,
+create robust guardrails, and run systematic experiments with
+built-in experiment tracking and performance analytics—ensuring reliability,
+transparency, and continuous improvement across the AI lifecycle.
+
+## Getting started
+
+This tutorial follows the [CrewAI quickstart](/en/quickstart) and shows how to add
+Galileo's [CrewAIEventListener](https://v2docs.galileo.ai/sdk-api/python/reference/handlers/crewai/handler),
+an event handler.
+For more information, see Galileo’s
+[Add Galileo to a CrewAI Application](https://v2docs.galileo.ai/how-to-guides/third-party-integrations/add-galileo-to-crewai/add-galileo-to-crewai)
+how-to guide.
+
+> **Note** This tutorial assumes you have completed the [CrewAI quickstart](/en/quickstart).
+If you want a completed comprehensive example, see the Galileo
+[CrewAI sdk-example repo](https://github.com/rungalileo/sdk-examples/tree/main/python/agent/crew-ai).
+
+### Step 1: Install dependencies
+
+Install the required dependencies for your app.
+Create a virtual environment using your preferred method,
+then install dependencies inside that environment using your
+preferred tool:
+
+```bash
+uv add galileo 
+```
+
+### Step 2: Add to the .env file from the [CrewAI quickstart](/en/quickstart)
+
+```bash
+# Your Galileo API key
+GALILEO_API_KEY="your-galileo-api-key"
+
+# Your Galileo project name
+GALILEO_PROJECT="your-galileo-project-name"
+
+# The name of the Log stream you want to use for logging
+GALILEO_LOG_STREAM="your-galileo-log-stream "
+```
+
+### Step 3: Add the Galileo event listener
+
+To enable logging with Galileo, you need to create an instance of the `CrewAIEventListener`.
+Import the Galileo CrewAI handler package by
+adding the following code at the top of your main.py file:
+
+```python
+from galileo.handlers.crewai.handler import CrewAIEventListener
+```
+
+At the start of your run function, create the event listener:
+
+```python
+def run():
+    # Create the event listener
+    CrewAIEventListener()
+    # The rest of your existing code goes here
+```
+
+When you create the listener instance, it is automatically
+registered with CrewAI.
+
+### Step 4: Run your crew
+
+Run your crew with the CrewAI CLI:
+
+```bash
+crewai run
+```
+
+### Step 5: View the traces in Galileo
+
+Once your crew has finished, the traces will be flushed and appear in Galileo.
+
+![Galileo trace view](/images/galileo-trace-veiw.png)
+  
+## Understanding the Galileo Integration
+
+Galileo integrates with CrewAI by registering an event listener
+that captures Crew execution events (e.g., agent actions, tool calls, model responses)
+and forwards them to Galileo for observability and evaluation.
+
+### Understanding the event listener
+
+Creating a `CrewAIEventListener()` instance is all that’s
+required to enable Galileo for a CrewAI run. When instantiated, the listener:
+
+- Automatically registers itself with CrewAI
+- Reads Galileo configuration from environment variables
+- Logs all run data to the Galileo project and log stream specified by
+  `GALILEO_PROJECT` and `GALILEO_LOG_STREAM`
+
+No additional configuration or code changes are required.
+All data from this run is logged to the Galileo project and
+log stream specified by your environment configuration
+(for example, GALILEO_PROJECT and GALILEO_LOG_STREAM).