Provenance of the Improbable Engine, kept guide-style as the build happened. The full chronicle travels in the bundle at chronicles/CHRONICLE_LATTICE_TORUS_FIRST_FORMS_2026-07-27.md — this page is its trailhead.

The walk in brief: the five labs were ground-truthed from the open call; the geometry study against the game-of-42 and star canon produced the torus-is-the-codex-closed finding and the six-strand seating; the first Three.js form went live against the local farm the same day, with the sitemap links discovery making the Promise Graph nearly free; Mitch's first viewing named the piece, found the fold-slider bug, and asked for saveable constellations and the generative turn; the Lattice Garden research then reframed the engine as the exhibit the Shared Lexicon Lattice proposal had already promised.

Open seats: the hearth-manifest review, the lab-to-axis confirmation, fork-provenance edges from page journals, the moving-ceiling reading, the seal card, and the overlap ceremony.