The teacher who wrote nothing
Socrates wrote nothing, and Plato wrote almost everything through him: in dialogue after dialogue Socrates is the principal speaker, the questioner who drives the inquiry. The platform reads the relation between the two as the deepest puzzle in ancient philosophy — the "Socratic problem" of where the historical Socrates ends and Plato's own philosophy begins. Because our principal witness to Socrates is Plato, and because Plato made Socrates the mouthpiece of his own developing thought, the two are bound together so closely that disentangling them may be impossible.
The Socratic dialogues
The platform reads the early, "Socratic" dialogues as preserving the Socrates closest to the historical man — and the legacy he left Plato. Here Socrates professes his own ignorance, questions others to expose theirs, and pursues definitions of the virtues that the dialogues characteristically fail to reach (the aporetic ending). The platform reads the ethical core of this legacy as the conviction that virtue is knowledge, that no one does wrong willingly, that the care of the soul is the highest task, and that it is better to suffer injustice than to do it. The Apology and Crito preserve the figure most directly: the man who would die rather than abandon the examined life.
Where the pupil takes over
The platform reads the development of Plato's thought as the gradual emergence of the pupil from behind the teacher. In the middle dialogues — the Republic, the Phaedo, the Symposium — Socrates becomes the spokesman for doctrines the historical Socrates probably never held: the theory of Forms, the immortality of the soul, the elaborate metaphysics and politics that are Plato's own. In the late dialogues Socrates fades, sometimes vanishing entirely. The platform reads this arc as the answer, so far as one is possible, to the Socratic problem: the early dialogues give us Socrates, the later ones give us Plato, and the middle ones give us the moment of transition.
Why the platform reads it
The platform reads the legacy of Socrates in Plato as the foundation of the whole Western philosophical tradition — the transmission of the Socratic example (the method, the ethics, the martyrdom) into the written philosophy that carried it to every later age. Without Plato, Socrates would be a half-legendary figure known only at second hand; through Plato, he became the patron saint of philosophy. The relation of the two is read directly in Socrates vs Plato.