Lev Vygotsky formulated the ZPD in the 1920s–30s; his work reached the West in translation in 1978 (Mind in Society). The ZPD reframed pedagogy: effective teaching is not delivery of content, but dynamic calibration of support at the edge of current capability.
Jerome Bruner later named the support scaffolding — and, crucially, noted that scaffolding must fade as the learner internalises the skill. Permanent scaffolding produces permanent dependence.
Fluera’s AI is built for the ZPD. Socratic prompts are calibrated to the current canvas. Ghost Map reveals exactly as much as the gap requires. Spaced repetition widens intervals as performance improves. The scaffolding fades as you grow — because the alternative is the Zone of Non-Development, where every task still needs the AI and nothing consolidates.