Merge pull request #4 from msleigh/claude/prioritize-todo-list-IokDP

Author: msleigh

docs/TODO.md

@@ -0,0 +1,16 @@
+# TODO
+
+## High-value improvements
+
+- [ ] Add unit tests for core Python modules (imc_source.py, imc_track.py, etc.)
+- [ ] Add type hints to the Python modules
+- [x] Remove or integrate main.py
+- [ ] Make hardcoded values configurable (RNG seed, -j 4 parallelism, comparison tolerances)
+- [ ] Add Python implementation documentation (comparable to ford.md for Fortran)
+
+## From ford.md "Notes for extension"
+
+- [ ] Implement the reserved `-d, --debug` flag
+- [ ] Refactor global modules to derived types, coordinating across all subroutines
+- [ ] Extend `imc_track` beyond 1D slab geometry assumption
+- [ ] Make plot times configurable in `imc_opcon` instead of hardcoded three snapshots