docs: mark open and generate parity complete

README.md

@@ -40,6 +40,8 @@ Implemented commands:
 - `commit -m MESSAGE [CASTLE]`
 - `destroy [CASTLE]`
 - `cd [CASTLE]`
+- `open [CASTLE]`
+- `generate PATH`
 - `rc [CASTLE]`
 - `version`
 
@@ -53,10 +55,8 @@ Implemented commands:
 
 Not yet implemented:
 
-- `open`
 - `exec`
 - `exec_all`
-- `generate`
 
 ## Outstanding Feature Checklist
 
@@ -67,10 +67,10 @@ Command parity:
 - [x] `commit`
 - [x] `destroy`
 - [x] `cd`
-- [ ] `open`
+- [x] `open`
 - [ ] `exec`
 - [ ] `exec_all`
-- [ ] `generate`
+- [x] `generate`
 
 Historical flag/behavior parity: