Session: January 20, 2026 (~2 hours) Branch: mission-planning Goals Achieved: 1. Diagnosed spacecraft initialization bug from mission_planning.md FIXME 2. Created comprehensive test suite with 4 test cases 3. Implemented config validation for parent-child distances 4. Fixed spacecraft position in earth_mars_simple.toml (LEO altitude) 5. Updated test 3 to use radius-based validation 6. Updated documentation to reflect resolution status Results: - Tests 1-3 now pass (Earth→Spacecraft, Mass Hierarchy, Config Validation) - Test 4 fails as expected (Mutual SOI edge case - separate issue) - FIXME bug from mission_planning.md now resolved Files Created: - docs/test_plan_invalid_parent_assignment.md (+185 lines) - tests/test_invalid_parent_assignment.cpp (+177 lines) - tests/configs/mutual_soi_close.toml (+34 lines) - docs/session_summaries/2026-01-20-invalid-parent-assignment-bug-resolution.md (+252 lines) Files Modified: - src/config_loader.cpp (+20 lines) - Config validation - tests/configs/earth_mars_simple.toml (position corrected) - docs/mission_planning.md (+7/-14 lines) - FIXME marked RESOLVED Commits: - 0239cc1 - Add test suite for invalid parent assignment bugs - 899fa3b - Add config validation for parent-child distances - 4d10be1 - Update documentation with resolution status - <current commit> - Add session summary
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