Each source describes a document as a converter first read it, mistakes included, in a shorthand that tools/build.py expands. The build mints IDs, applies the listed corrections, lays out synthetic geometry, signs the listed receipts and writes the package. The shorthand is tooling, not a format.

Shorthand	Becomes
`{"p": [...]}`	A paragraph of the listed sentences.
`{"s": [...]}`	A sentence; a string part is a text run.
`{"sup": t}`, `{"sub": t}`, `{"em": t}`	A styled text run.
`{"m": src}`, `{"t": src}`	A TeX or Typst math run.
`{"cite": [...], "text": t}`, `{"xref": target, "text": t}`, `{"fn": name, "text": t}`	Citation, cross-reference and footnote-mark runs.
`{"eq": {...}}`	A display equation inside the sentence.
`{"row": [...]}`, `{"c": [...]}`	A table row, and a cell with `role`, `rowspan`, `colspan` and `col`.
`"name": "@x"`	A local name, replaced by the minted ID; `ext:<doc>:@x` names a node of another source.
`"page": n`	The page the node and its descendants are laid out on.

corrections lists the operations in order, naming nodes by local name; crop names the node whose crop is the evidence. anchors_at_rev0 lists the anchors whose resolution vectors/resolve.jsonl records, and receipts the receipts, spot-checks and revocations to sign.