diff --git a/docs/TODO b/docs/TODO
index fffdf34..f42040a 100644
--- a/docs/TODO
+++ b/docs/TODO
@@ -13,6 +13,11 @@ Manual TODO file, no claude's allowed!
 
 	- the other claude generated files in docs/ are also overly verbose
 
+=== Simulation Config Files ===
+	- decide on an easier to read format, likely TOML or JSON
+		- the config_loader module needs to be refactored, and likely needs some
+			logic moved to the bodies module (which should probably be renamed
+			simulation)
 
 === Orbital Mechanics/Physics ===
 	- change orbit propagation method to Newton-Raphson
@@ -21,9 +26,16 @@ Manual TODO file, no claude's allowed!
 		- find some test data for solar system object orbits for verification
 		- also need tests for circular orbits, and orbits which might have anomalies
 			with simple trig equations
+		- test for orbit state after many revolutions
 		- a nice concise reference doc: https://web.mit.edu/10.001/Web/Course_Notes/NLAE/node6.html
 		- lastly test with different time steps to find an 'acceptable' error that's
 			pretty accurate, but doesn't take too many iterations. I used < 10
 			originally in orbital_shipping
 
+
 	- parabolic, and hyperbolic orbits with tests
+
+
+=== rendereing ===
+	- for starters, the minimum scaling of objects should be replaced with some
+		kind of billboard system