update README

README.md

@@ -8,6 +8,24 @@ This will launch Harmony's minimalist terminal ui which embeds a few demo scores
 
 Usage instructions will be displayed at the bottom of the TUI.
 
+`cargo run --bin example-cli -- --help`
+
+This is the harmony CLI, a minimal implementation
+
+The current help text:
+
+```
+Usage: example-cli [OPTIONS] --run <RUN>
+
+Options:
+  -r, --run <RUN>        Name of score to run
+  -i, --interactive      Run interactive or not
+  -a, --all              Run all or nth
+  -n, --number <NUMBER>  Run nth matching, zero indexed [default: 0]
+  -h, --help             Print help
+  -V, --version          Print version
+```
+
 ## Core architecture
 
 ![Harmony Core Architecture](docs/diagrams/Harmony_Core_Architecture.drawio.svg)