updated llms.txt, contribution guide and added community folder with README

environments/community/README.md

@@ -0,0 +1,18 @@
+# Community Environments
+
+This directory is home to community-contributed training environments for Atropos. Environments submitted by the community will be placed here after an initial code review.
+
+**Note:** Environments in this directory are pending full testing and integration. While they have passed a basic code check, they may not yet have been rigorously validated on our compute cluster.
+
+## Contributing Your Environment
+
+We encourage you to contribute your own RL environments! When developing a new environment, please follow these guidelines:
+
+1.  **Create your environment in this `environments/community/` subdirectory.** This helps us keep new submissions organized.
+2.  **Preferred Import Style:** We prefer that you treat your environment's directory as the package root for imports within your environment code. For example, if you need to import `SomeClass`, you can do so directly:
+    ```python
+    from some_file_in_my_env import SomeClass
+    ```
+    This helps maintain consistency and makes it easier to integrate your environment.
+
+Once your environment is ready, please follow the guidelines in our main [CONTRIBUTING.md](../../../CONTRIBUTING.md) to submit your contribution. We look forward to seeing what you build!