+You can also run the programs through an interpreter (`main.py interpret`):
+
+ ~/fur$ python main.py examples/01_hello.fur
+ Hello, world$
+
+The final way to invoke the main program is `main.py ir`. This outputs an intermediate "assembly" for the bytecode representation of the program:
+
+ ~/fur$ python main.py ir examples/01_hello.fur
+ __main__:
+ push_string "Hello, world"
+ push sym(print)
+ call 1
+ drop
+ end nil
+
+## Integration tests
+
+Integration tests are divided into three categories:
+
+* Compiler output tests: test that compiled Fur programs give expected output. Run with `python integration_tests.py CompilerOutputTests`.
+* Interpreter output tests: test that interpreted Fur programs give expected output. Run with `python integration_tests.py InterpreterOutputTests`.
+* Memory lead tests: test that compiled Fur programs don't leak memory (requires Valgrind). Run with `python integration_tests.py MemoryLeakTests`.
+
+Calling `python integration_tests.py` with no arguments runs all the integration tests.
+
+## Disclaimers
+
+Fur is GPL 3 and will only ever target GPL compilers. Fur supports closures, integer math, boolean