- Add branching tech alternatives across all six fields (computers,
construction, forcefields, planetology, propulsion, weapons). Each
branched tier has 2+ techs sharing the same rung; researching any one
clears the rung while leaving siblings researchable as side-picks.
- Correct racial skill to affect tech COST only (Poor 125%, Average 100%,
Good 80%, Excellent 60%), not availability. Availability is now a flat
50% roll per tech (75% for Cerebrai/psilon analogue), with a safety
net that no branched rung can end up with zero available options.
- Add techRungsByField data structure and rungCleared/canResearch/setResearchTarget
logic so the research screen lets players pick among open rung alternatives
without losing banked beakers.
- Update sprite sheet layout (+1 row, frames 66-77 for new tech icons).
- Add comprehensive verification tests for cost buckets, rung gating,
setResearchTarget behaviour, and statistical availability rates.
Brian Fertig
97dbe18dd2