README.md

@@ -2,5 +2,21 @@
 
 [![Please don't upload to GitHub](https://nogithub.codeberg.page/badge.svg)](https://nogithub.codeberg.page)
 
-(The only purpose of this is learning Rust!)
+## To-do
 
+- [x] Read commands from `stdin`
+- [ ] Exit with last child termination code
+- [ ] Handle background jobs
+- [ ] Handle pipes
+- [ ] Handle double quotes
+- [ ] Handle variables
+- [ ] Interaction with environment variables
+- [ ] Handle aliases
+- [ ] Builtins
+    - [ ] `cd`
+    - [ ] `exit`
+- [ ] Special variables
+    - [ ] `_`
+    - [ ] `PS1`
+    - [ ] Positional variables
+- [ ] Handle signals