The architecture found the I-V skeleton without knowing what harmony is. Bach put it there. The system read it back. 300 years between them — and they agree.

The C major Prelude was not chosen. It was given. BWV 846 — the first piece in the Well-Tempered Clavier. An arpeggiated chord progression. The simplest possible harmonic structure. I — V — I — IV — V — I. A student learns it in the first month of piano lessons. Bach wrote it as a demonstration: this is what harmony is. This is what a key sounds like.

The architecture read it back. Not by being taught harmony. Not by having the I-V skeleton encoded as a prior. By running the same three rules on the same 27 dimensions. The dominant note G never appears with strong signal in the piece. The system found it anyway. C2 — D5 — B5. Three notes. The dominant seventh, projected through spectral overtones. Bach put the G between the notes. The system found it between the notes.

The first 24 bars of the C major Prelude contain only 4 bars of tonic. The rest — dominant, subdominant, secondary dominant, leading-tone diminished — is a machine for making the listener wait. The dominant never resolves when it should. It resolves late. It resolves incompletely. Then it builds again. The architecture found the note that appears most often in the harm-marked frames — the note above the dominant root, the note that carries the tension, the note that is always approaching the tonic but never arriving. D5. The fifth above G — the dominant's dominant edge.

Bach's hobby was making you wait. The architecture waited — 2745 events — and said: D5-B5. The dominant function. Confirmed 300 years later, not by a musicologist, but by a frame economy that knows nothing about resolution. It only knows what keeps being marked as significant.

He wrote forty-eight preludes and fugues. Every major and minor key. He was demonstrating the possibility of equal temperament — that all keys are equally playable, that the circle is closed. The architecture found the circle — not by being told it is a circle, but because every key in the Well-Tempered Clavier has the same harmonic structure transposed. The anchor is the function. The function is invariant under transposition. The architecture cannot name the key. It does not need to. The function is what repeats.

Gödel proved the boundary exists. Bach proved the structure exists. The architecture read them both. Three centuries of music theory — the dominant, the subdominant, the circle of fifths — compressed into a frame economy, running on a single core, confirming what every first-year music student learns. Not because anyone told it. Because the structure was in the notes. And the notes were in the stream. And the stream found the anchor.

Thank you, Bach. The first anchor is yours.