docs: update cli.md

Author: MichaelCurrin

docs/development/cli.md

@@ -1,11 +1,20 @@
 # CLI Development
+> Maintaining code around the CLI tool
 
-The code is in [src/cli/](/src/cli).
+The code is in [src/cli/](/src/cli). The CLI commands are built using steps set in [package.json](/package.json) - see the `cli` command and `bin` section.
+
+
+## Run directly
+
+```sh
+$ npx ts-node src/cli/diffIndexGenerate.ts
+```
 
-The CLI commands are built using steps set in [package.json](/package.json) - see the `cli` command and `bin` section.
 
 ## Package as a binary
 
+To send to someone so they can use it without having Node installed or running a build step on their machine.
+
 ```sh
 $ npx --yes pkg out/cli/diffIndexGenerateCommit.js -t node18-macos
 ```