Pick a house or a planet and read how four traditions treat the same chart feature, side by side, in chronological order — Ptolemy's 2nd-century natural philosophy, the Victorian skeptic, the Theosophical revival, and today's flagship interpretation set. Evolution across traditions is the point: where a tradition has no entry (the outer planets didn't exist for Ptolemy), the gap is shown honestly, not papered over. Back to the library.
grammars/tetrabiblos-ashmand/grammar.json,
grammars/proctor-skeptical-astrology/grammar.json,
grammars/alan-leo/grammar.json, and
grammars/western-astrology-canonical/grammar.json — and matched by house number
or planet name. No backend, no build step. See the library for every
grammar in this repo, or the chart viewer to cast
your own chart.