Update OSDK reference

docs/src/osdk/reference/commands/README.md

@@ -1 +1,14 @@
 # Commands
+
+OSDK provides similar commands as Cargo, and these commands have simalar meanings as corresponding Cargo commands.
+
+Currently, OSDK supports the following commands: 
+
+- **new**: Create a new kernel package or library package
+- **build**: Compile the project and its dependencies
+- **run**: Run the kernel with a VMM 
+- **test**: Execute kernel mode unit test by starting a VMM
+- **check**: Analyze the current package and report errors
+- **clippy**: Check the current package and catch common mistakes
+
+The **new**, **build**, **run** and **test** commands can accept additional options, while the **check** and **clippy** commands cannot.