move notes about config_assumptions to manual TODO

docs/TODO

@@ -20,7 +20,12 @@ Manual TODO file, no claude's allowed!
     - the config_loader module needs to be refactored, and likely needs some
         logic moved to the bodies module (which should probably be renamed
         simulation)
+    - config file validation
+        - check for unrealistic orbital parameters
+        - update remaining configs/* to new format
+        - we need to keep an example with a binary system
+        - relative coordinates for child bodies
 
-=== rendereing ===
+=== rendering ===
     - for starters, the minimum scaling of objects should be replaced with some
         kind of billboard system

docs/config_assumptions.md

@@ -1,43 +0,0 @@
-# Configuration Issues & Known Bugs
-
-## Active TODOs:
-- ⚠️ **TODO**: Update configs/solar_system.txt to new 12-field format
-- ⚠️ **TODO**: Update configs/example_binary_star.txt to new 12-field format
-- ⚠️ **TODO**: Fix Moon and Jupiter's moons positions in solar_system.txt
-
-## Fixed Issues:
-- ✅ Eccentric orbit support added
-- ✅ Binary star barycenter calculation
-- ✅ Refactored main.cpp into focused functions
-- ✅ Initial state capture in headless mode
-
-## Known Issues:
-
-### Solar System Configuration Issues:
-
-**Moon position is incorrect (configs/solar_system.txt)**
-- Earth at: `(1.496e11, 0, 0)` m
-- Moon at: `(1.500e11, 0, 0)` m
-- Distance: ~4M km, should be ~384,400 km (~3.844e8 m)
-- Should be at: `(1.496e11 + 3.844e8, 0, 0)` approximately
-
-**Jupiter's moons positions (configs/solar_system.txt)**
-- Io, Europa, Ganymede, Callisto all positioned incorrectly
-- Currently use absolute coordinates, should be relative to Jupiter
-- Example: Io at `(8.207e11, 0, 0)` - 422M km from Jupiter (should be ~422,000 km)
-
-### Implementation Notes:
-
-**Coordinate system**: All positions are absolute (heliocentric), not relative to parent
-**Velocity calculation**: Uses vis-viva equation: `v = sqrt(G*M*(2/r - 1/a))`
-**Orbit plane**: All orbits calculated in XY plane (Z-axis perpendicular)
-
-## Future Improvements:
-
-### Validation:
-- Add config file validation to warn about incorrectly positioned child bodies
-- Check for unrealistic orbital parameters
-
-### Features:
-- Consider relative coordinate option for child bodies
-- Add 3D orbit support (currently all orbits in XY plane)