docs: Add "Running OpenHands with OpenHands" section for recursive development (#9146)

Co-authored-by: openhands <openhands@all-hands.dev>

.openhands/microagents/repo.md

@@ -5,6 +5,18 @@ This repository contains the code for OpenHands, an automated AI software engine
 To set up the entire repo, including frontend and backend, run `make build`.
 You don't need to do this unless the user asks you to, or if you're trying to run the entire application.
 
+## Running OpenHands with OpenHands:
+To run the full application for development or self-improvement:
+```bash
+export INSTALL_DOCKER=0
+export RUNTIME=local
+make build && make run
+```
+For external access (cloud environments), use:
+```bash
+make run FRONTEND_PORT=12000 FRONTEND_HOST=0.0.0.0 BACKEND_HOST=0.0.0.0
+```
+
 IMPORTANT: Before making any changes to the codebase, ALWAYS run `make install-pre-commit-hooks` to ensure pre-commit hooks are properly installed.
 
 Before pushing any changes, you MUST ensure that any lint errors or simple test errors have been fixed.

Development.md

@@ -103,6 +103,29 @@ components or interface enhancements.
   make start-frontend
   ```
 
+### 5. Running OpenHands with OpenHands
+
+You can use OpenHands to develop and improve OpenHands itself! This is a powerful way to leverage AI assistance for contributing to the project.
+
+#### Quick Start
+
+1. **Build and run OpenHands:**
+   ```bash
+   export INSTALL_DOCKER=0
+   export RUNTIME=local
+   make build && make run
+   ```
+
+2. **Access the interface:**
+   - Local development: http://localhost:3001
+   - Remote/cloud environments: Use the appropriate external URL
+
+3. **Configure for external access (if needed):**
+   ```bash
+   # For external access (e.g., cloud environments)
+   make run FRONTEND_PORT=12000 FRONTEND_HOST=0.0.0.0 BACKEND_HOST=0.0.0.0
+   ```
+
 ### 6. LLM Debugging
 
 If you encounter any issues with the Language Model (LM) or you're simply curious, export DEBUG=1 in the environment and restart the backend.