— verified upstream

Written 2026-09-09 from the upstream side, in response to SITEMAP.md’s note that the symmetry entry was “taken from CLAUDE.md and not verified in this pass.” The repos have now been checked and the deployed copies diffed.

SITEMAP.md’s row for /symmetry/ is wrong in two ways — see “Corrections” below. Everything here was verified by reading the files, not from memory.

Source of truth

/Users/brian/Dropbox/CreatingSymmetry/CreatingSymmetry/PureScript/purescript-digital-art/

That directory lives inside the hilbert-and-turner repo (git@github.com:chapmanbe/hilbert-and-turner.git, private; renamed from CreatingSymmetry in August 2026). The path retains the old name because CreatingSymmetry/ there means the Farris book, one of several projects in that repo — not the repo itself.

What is actually deployed

Five files at symmetry/, plus the docs/ (1.2M) and gallery/ (19M) image trees. Sizes as of 2026-09-09:

Deployed	Bytes	Source	State
`app.js`	47,885	`dist/app.js`	byte-identical
`style.css`	4,731	`style.css`	byte-identical
`about.html`	18,901	`about.html`	byte-identical
`gallery.html`	8,943	`gallery.html`	byte-identical
`index.html`	4,412	`index.html`	one line differs, deliberately

The index.html difference is the documented deploy step: the source says <script src="dist/app.js">, the deployed copy says <script src="app.js">, because the bundle sits beside the HTML here rather than in a dist/ subdirectory.

symmetry/assets/ was empty and referenced by nothing — another leftover of the p5.js version — and was deleted on 2026-09-09. Nothing from that version remains under symmetry/.

symmetry/README.md is tracked here and is not deployed output; it documents the app for anyone browsing the repo. It described the p5.js version until it was rewritten on 2026-09-09.

Corrections to SITEMAP.md

1. The stack is PureScript, not p5.js. app.js is an esbuild bundle of PureScript output — it opens (() => { // output/Data.Int/foreign.js. There is no p5.js and no math.js on the live page. The only external files index.html loads are style.css and app.js, alongside a short inline script that shows the custom-scheme field.

2. The upstream repo is chapmanbe/hilbert-and-turner, not chapmanbe/CreatingSymmetry. That name no longer exists — the repo was renamed in August 2026.

The “copy from there, don’t edit here” guidance is correct and worth keeping.

`js/` and `css/` are gone (deleted 2026-09-09)

symmetry/js/ (68K) and symmetry/css/ (8K) held the earlier p5.js version:

js/sketch.js  js/complex-functions.js  js/math-parser.js
js/symm-utils.js  js/ui-controls.js    css/style.css

Nothing referenced them — no page loads anything from either directory — so they were actively misleading: reading the directory rather than the HTML suggested a p5.js site, which is how SITEMAP.md’s row went wrong in the first place. The p5.js version is retired, and they have been deleted.

They were never committed, so there is no history to recover them from. That was the deciding fact rather than an argument for keeping them: an earlier draft of this note claimed the p5.js version was “already preserved in symmetry-p5-backup/”, which was false — that directory had been deleted by this project as serving no purpose. The deploy step in the upstream repo’s CLAUDE.md that recreated it has been removed too, since by then it would have copied the PureScript app into a directory named for p5.js.

Deployed versions of the current app are recoverable from this repo’s git history in the ordinary way; no sibling backup directory is involved.

Rebuilding

app.js is compiled, never hand-edited. Its PureScript sources:

src/Fourier.purs         mu-g curve, fkm selective sum
src/Symmetry.purs        the renderer
src/SymmetryColors.purs  HSLA colour state machine
src/UI.purs + UI.js      canvas and controls
src/Main.purs            entry point

Build and deploy steps are in the upstream repo’s CLAUDE.md under “Deploying to GitHub Pages” — bundle with spago/esbuild, patch the script path, copy the changed files.

Note for the map