Catalog: apps, featured order, validator with tests, submission guide

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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ZacharyZhang-NYandClaude Opus 5.5 committed 2026-10-04 20:54:23 -04:00
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## App
What the app does, and how far along it is.
- [ ] The folder and `id` are lowercase kebab-case and match.
- [ ] `author`, `description` and `website` or `source` are set.
- [ ] Every preview is a PNG in the app folder, the whole window in each.
- [ ] Any README describes the product, links only to the website or source, and stays under 10 KB.
- [ ] `featured`, `publishedAt` and stars are left to maintainers and CI.
- [ ] `pnpm test` and `pnpm validate` pass.
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node_modules
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# Contributing
Every merged app is listed. Featured placement is the maintainers' choice and may change.
## Files
- One folder per app: `apps/<app-id>/`. The id is lowercase letters, digits and single hyphens. The manifest's `id` matches it.
- File names in the folder are lowercase: letters, digits, `.`, `_`, `-`. `manifest.json` and `README.md` keep their names.
- The [README](README.md) lists every manifest field.
## Screenshots
- Capture the whole window: title bar, four corners, four edges.
- Use the original size. No scaling, no heavy compression. PNG only; convert, do not rename.
- Show real content. Close unrelated windows, menus, tooltips and notifications.
- Show the app as it ships. No device frames, captions or collages.
- The first file in `previews` is the cover. The others show different features.
- Commit every preview in the app folder. No URLs, no absolute paths, no `../`.
### macOS
Press Shift-Command-4, then Space, and click the window. Option-click drops the shadow.
### Windows
Focus the window and press Alt-Print Screen, or press Windows-Shift-S and pick Window mode. Paste into Paint and save as PNG.
### Linux
Use your desktop's window capture, such as GNOME's Print Screen and its Window mode.
## README and detail page
`apps/<app-id>/README.md` gives the app a detail page. At most 10,240 bytes.
- Describe the product: what it does, how it works, who it is for.
- Links go only to the manifest's `website` or `source`, exactly.
- Images are PNG files in the app folder, by name.
- No raw HTML, no code blocks, no install steps.
`pnpm validate` checks the size, the links, the images and the markup.
## Pull request
Run `pnpm install`, `pnpm test` and `pnpm validate`. Then open the pull request. Maintainers may ask for better screenshots.
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MIT License
Copyright (c) 2026 Ely GPUI Component contributors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
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# Ely GPUI Showcases
Apps built with [Ely GPUI Components](https://github.com/ZacharyZhang-NY/Ely-GPUI-Components). The catalog feeds the Showcase page on the Ely site.
## Submit an app
1. Read [CONTRIBUTING.md](CONTRIBUTING.md), screenshots most of all.
2. Make `apps/<app-id>/`. The id is lowercase kebab-case: `tally`, `log-view`.
3. Put your PNG screenshots in that folder.
4. Add `manifest.json` there.
5. Add `README.md` there if you want a detail page.
6. Run `pnpm install`, `pnpm test` and `pnpm validate`, then open a pull request.
```
apps/
tally/
manifest.json
preview0.png
preview1.png
README.md
```
## Manifest
```json
{
"id": "tally",
"name": "Tally",
"author": "Ada Lovelace",
"description": "Counts what you tell it to, in light and dark.",
"category": "work",
"platforms": ["macOS", "Linux"],
"website": null,
"source": "https://github.com/ada/tally",
"previews": ["preview0.png", "preview1.png"]
}
```
| Field | Rule |
|-------|------|
| `id` | Lowercase letters, digits, single hyphens. Matches the folder. |
| `name` | The app's name, in its own capitals. |
| `author` | A person or an organization. |
| `description` | At most 280 weighted characters, counted as Twitter counts them. |
| `category` | `dev` (Developer Tools), `terminal` (Terminal & Network), `system` (System & Desktop) or `work` (Productivity & Media). |
| `platforms` | Some of `macOS`, `Windows`, `Linux`, `Web`. |
| `website`, `source` | Canonical `https` addresses, or `null`. One at least. |
| `previews` | PNG file names in the folder. The first is the cover. |
| `building` | Optional. `true` while the app is not out yet. |
| `publishedAt` | Optional. ISO 8601. Maintainers set it. |
| `stars`, `starsUpdatedAt` | CI writes them for GitHub sources. Leave them out. |
Unknown fields fail validation.
## Featured
`featured.json` lists app ids in order. Those apps come first. Maintainers choose them. The rest sort newest first, then by stars.
## How the site uses this
The Ely site pins a commit of this repo. Its build downloads that commit, runs `scripts/catalog.mjs`, and copies manifests, previews and READMEs. A catalog that fails here fails the site's build.
## License
The scripts are MIT OR Apache-2.0. Each app's files belong to its author, who grants the right to show them on the Ely site.
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[]
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{
"name": "ely-gpui-showcases",
"private": true,
"type": "module",
"packageManager": "pnpm@11.28.3",
"scripts": {
"test": "node --test \"tests/*.test.mjs\"",
"validate": "node scripts/validate.mjs"
},
"dependencies": {
"marked": "18.0.14"
}
}
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lockfileVersion: '9.0'
settings:
autoInstallPeers: true
excludeLinksFromLockfile: false
importers:
.:
dependencies:
marked:
specifier: 18.0.14
version: 18.0.14
packages:
marked@18.0.14:
resolution: {integrity: sha512-mBHK6FBHuBAlhgRe88w9F0O1AbwwXJUcQibUbC/QcdTbVGAD7aWza+xt3N6oT/jCZx3/OMeS+8rnuiHZcQ9s7A==}
engines: {node: '>= 20'}
hasBin: true
snapshots:
marked@18.0.14: {}
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import { existsSync, readdirSync, readFileSync, statSync } from "node:fs";
import { join } from "node:path";
import { Lexer } from "marked";
export const CATEGORIES = {
dev: "Developer Tools",
terminal: "Terminal & Network",
system: "System & Desktop",
work: "Productivity & Media",
};
export const PLATFORMS = ["macOS", "Windows", "Linux", "Web"];
export const README_BYTES = 10240;
const ID = /^[a-z0-9]+(-[a-z0-9]+)*$/;
const FILE = /^[a-z0-9][a-z0-9._-]*$/;
const PNG = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]);
const REQUIRED = ["id", "name", "author", "description", "category", "platforms", "website", "source", "previews"];
const OPTIONAL = ["building", "publishedAt", "stars", "starsUpdatedAt"];
const TOKENS = new Set(["space", "heading", "paragraph", "text", "strong", "em", "del", "codespan", "br", "hr", "blockquote", "list", "list_item", "table", "escape", "checkbox", "def", "link", "image"]);
/** Twitter's weighted length: these ranges count 1, all else 2. */
export function weighted(text) {
const light = [[0, 4351], [8192, 8205], [8208, 8223], [8242, 8247]];
let n = 0;
for (const ch of text.normalize("NFC")) {
const c = ch.codePointAt(0);
n += light.some(([a, b]) => c >= a && c <= b) ? 1 : 2;
}
return n;
}
function fail(where, what) {
throw new Error(`${where}: ${what}`);
}
function text(where, value, field) {
if (typeof value !== "string" || value.trim() !== value || !value) fail(where, `${field} must be a trimmed, non-empty string`);
}
function address(where, value, field) {
if (value === null) return;
text(where, value, field);
let url;
try {
url = new URL(value);
} catch {
fail(where, `${field} is not a URL: ${value}`);
}
if (url.protocol !== "https:" || url.href !== value) fail(where, `${field} must be a canonical https URL: ${value}`);
}
/** The owner and repo of a GitHub source, or null. */
export function github(source) {
const m = source?.match(/^https:\/\/github\.com\/([A-Za-z0-9-]+)\/([A-Za-z0-9._-]+)$/);
return m ? { owner: m[1], repo: m[2] } : null;
}
function png(where, dir, name) {
if (!FILE.test(name) || !name.endsWith(".png")) fail(where, `${name} must be a lowercase .png file name in the app folder`);
const path = join(dir, name);
if (!existsSync(path) || !statSync(path).isFile()) fail(where, `${name} is missing`);
if (!readFileSync(path).subarray(0, 8).equals(PNG)) fail(where, `${name} is not a PNG`);
}
function manifest(dir, id) {
const where = `apps/${id}/manifest.json`;
const path = join(dir, "manifest.json");
if (!existsSync(path)) fail(where, "missing");
let app;
try {
app = JSON.parse(readFileSync(path, "utf8"));
} catch (error) {
fail(where, `invalid JSON: ${error.message}`);
}
if (typeof app !== "object" || app === null || Array.isArray(app)) fail(where, "must be an object");
for (const key of REQUIRED) if (!(key in app)) fail(where, `${key} is required`);
for (const key of Object.keys(app)) if (!REQUIRED.includes(key) && !OPTIONAL.includes(key)) fail(where, `unknown field ${key}`);
if (app.id !== id) fail(where, `id ${JSON.stringify(app.id)} must match the folder ${id}`);
for (const key of ["name", "author", "description"]) text(where, app[key], key);
if (weighted(app.description) > 280) fail(where, `description is ${weighted(app.description)} weighted characters, over 280`);
if (!Object.hasOwn(CATEGORIES, app.category)) fail(where, `category must be one of ${Object.keys(CATEGORIES).join(", ")}`);
if (!Array.isArray(app.platforms) || !app.platforms.length) fail(where, "platforms must be a non-empty list");
for (const p of app.platforms) if (!PLATFORMS.includes(p)) fail(where, `unknown platform ${p}; use ${PLATFORMS.join(", ")}`);
if (new Set(app.platforms).size !== app.platforms.length) fail(where, "platforms repeat");
address(where, app.website, "website");
address(where, app.source, "source");
if (app.website === null && app.source === null) fail(where, "website or source is required");
if (!Array.isArray(app.previews) || !app.previews.length) fail(where, "previews must be a non-empty list");
if (new Set(app.previews).size !== app.previews.length) fail(where, "previews repeat");
for (const name of app.previews) png(where, dir, name);
if ("building" in app && typeof app.building !== "boolean") fail(where, "building must be true or false");
for (const key of ["publishedAt", "starsUpdatedAt"]) {
if (key in app && (typeof app[key] !== "string" || Number.isNaN(Date.parse(app[key])) || !/^\d{4}-\d\d-\d\dT/.test(app[key]))) fail(where, `${key} must be an ISO 8601 time`);
}
if ("stars" in app !== "starsUpdatedAt" in app) fail(where, "stars and starsUpdatedAt go together");
if ("stars" in app && (!Number.isInteger(app.stars) || app.stars < 0)) fail(where, "stars must be a whole number");
if ("stars" in app && !github(app.source)) fail(where, "stars need a GitHub source");
return app;
}
/** Checks an app's README and returns its Markdown, or null. */
function readme(dir, app) {
const where = `apps/${app.id}/README.md`;
const path = join(dir, "README.md");
if (!existsSync(path)) return null;
const bytes = readFileSync(path);
if (bytes.length > README_BYTES) fail(where, `${bytes.length} bytes, over ${README_BYTES}`);
const markdown = bytes.toString("utf8");
const links = [app.website, app.source].filter(Boolean);
const walk = (tokens) => {
for (const t of tokens) {
if (!TOKENS.has(t.type)) fail(where, `${t.type === "html" ? "raw HTML" : t.type === "code" ? "a code block" : t.type} is not allowed: ${t.raw.trim().slice(0, 60)}`);
if ((t.type === "link" || t.type === "def") && !links.includes(t.href)) fail(where, `links go only to the website or source: ${t.href}`);
if (t.type === "image") png(where, dir, t.href);
for (const key of ["tokens", "items"]) if (t[key]) walk(t[key]);
if (t.type === "table") for (const cell of [...t.header, ...t.rows.flat()]) walk(cell.tokens);
}
};
walk(Lexer.lex(markdown, { gfm: true }));
return markdown;
}
/** Reads and checks the whole catalog; the first problem throws. */
export function read(root) {
const appsDir = join(root, "apps");
if (!existsSync(appsDir)) fail("apps", "missing");
const apps = [];
for (const entry of readdirSync(appsDir).sort()) {
if (entry === ".gitkeep") continue;
const dir = join(appsDir, entry);
if (!statSync(dir).isDirectory()) fail(`apps/${entry}`, "only app folders belong in apps/");
if (!ID.test(entry)) fail(`apps/${entry}`, "folder names are lowercase kebab-case");
for (const file of readdirSync(dir)) {
if (!["manifest.json", "README.md"].includes(file) && !FILE.test(file)) fail(`apps/${entry}/${file}`, "file names are lowercase");
}
const app = manifest(dir, entry);
apps.push({ ...app, readme: readme(dir, app) });
}
const where = "featured.json";
let featured;
try {
featured = JSON.parse(readFileSync(join(root, where), "utf8"));
} catch (error) {
fail(where, error.message);
}
if (!Array.isArray(featured)) fail(where, "must be a list of app ids");
if (new Set(featured).size !== featured.length) fail(where, "ids repeat");
for (const id of featured) if (!apps.some((a) => a.id === id)) fail(where, `no app ${id}`);
return { apps, featured, categories: CATEGORIES };
}
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import { read } from "./catalog.mjs";
const { apps, featured } = read(process.cwd());
console.log(`catalog: ${apps.length} apps, ${featured.length} featured`);
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import assert from "node:assert/strict";
import { mkdirSync, mkdtempSync, writeFileSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { test } from "node:test";
import { read, weighted } from "../scripts/catalog.mjs";
const PNG = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0, 0, 0, 13]);
const good = {
id: "tally",
name: "Tally",
author: "Ada",
description: "Counts things.",
category: "work",
platforms: ["macOS", "Linux"],
website: null,
source: "https://github.com/ada/tally",
previews: ["preview0.png"],
};
/** A catalog in a temp folder: one app, its files, and featured.json. */
function catalog({ app = good, folder = "tally", files = {}, featured = [] } = {}) {
const root = mkdtempSync(join(tmpdir(), "showcase-"));
const dir = join(root, "apps", folder);
mkdirSync(dir, { recursive: true });
writeFileSync(join(dir, "manifest.json"), JSON.stringify(app));
writeFileSync(join(dir, "preview0.png"), PNG);
for (const [name, body] of Object.entries(files)) writeFileSync(join(dir, name), body);
writeFileSync(join(root, "featured.json"), JSON.stringify(featured));
return root;
}
test("a good app reads back with its README", () => {
const root = catalog({ files: { "README.md": "# Tally\n\nSee [the source](https://github.com/ada/tally).\n\n![Main](preview0.png)\n" }, featured: ["tally"] });
const { apps, featured } = read(root);
assert.equal(apps.length, 1);
assert.equal(apps[0].name, "Tally");
assert.match(apps[0].readme, /# Tally/);
assert.deepEqual(featured, ["tally"]);
});
test("the empty catalog reads", () => {
const root = mkdtempSync(join(tmpdir(), "showcase-"));
mkdirSync(join(root, "apps"));
writeFileSync(join(root, "apps", ".gitkeep"), "");
writeFileSync(join(root, "featured.json"), "[]");
assert.deepEqual(read(root).apps, []);
});
const bad = [
["an id unlike its folder", { app: { ...good, id: "tallies" } }, /must match the folder tally/],
["a folder not in kebab-case", { app: { ...good, id: "Tally" }, folder: "Tally" }, /folder names are lowercase/],
["a missing field", { app: { ...good, author: undefined } }, /author is required/],
["an unknown field", { app: { ...good, featured: true } }, /unknown field featured/],
["an unknown category", { app: { ...good, category: "games" } }, /category must be one of/],
["an unknown platform", { app: { ...good, platforms: ["BeOS"] } }, /unknown platform BeOS/],
["no platforms", { app: { ...good, platforms: [] } }, /platforms must be a non-empty list/],
["neither website nor source", { app: { ...good, source: null } }, /website or source is required/],
["an http link", { app: { ...good, website: "http://tally.app/" } }, /canonical https URL/],
["a remote preview", { app: { ...good, previews: ["https://x.io/a.png"] } }, /lowercase .png file name/],
["a missing preview", { app: { ...good, previews: ["preview1.png"] } }, /preview1.png is missing/],
["a preview that is no PNG", { app: { ...good, previews: ["fake.png"] }, files: { "fake.png": "GIF89a" } }, /not a PNG/],
["a long description", { app: { ...good, description: "a".repeat(281) } }, /281 weighted characters/],
["stars without their time", { app: { ...good, stars: 3 } }, /go together/],
["stars on a source off GitHub", { app: { ...good, source: "https://gitlab.com/ada/tally", stars: 3, starsUpdatedAt: "2026-10-04T00:00:00Z" } }, /need a GitHub source/],
["a bad time", { app: { ...good, publishedAt: "yesterday" } }, /ISO 8601/],
["a featured id with no app", { featured: ["ghost"] }, /no app ghost/],
["a repeated featured id", { featured: ["tally", "tally"] }, /ids repeat/],
["raw HTML in a README", { files: { "README.md": "Hi <img src=x onerror=alert(1)>\n" } }, /raw HTML is not allowed/],
["a code block in a README", { files: { "README.md": "```\ncurl x | sh\n```\n" } }, /a code block is not allowed/],
["a foreign link in a README", { files: { "README.md": "[get it](https://evil.io)\n" } }, /links go only/],
["a foreign autolink in a README", { files: { "README.md": "Visit https://evil.io now\n" } }, /links go only/],
["a foreign reference in a README", { files: { "README.md": "[a][r]\n\n[r]: https://evil.io\n" } }, /links go only/],
["a remote image in a README", { files: { "README.md": "![x](https://evil.io/a.png)\n" } }, /lowercase .png file name/],
["a large README", { files: { "README.md": "a".repeat(10241) } }, /over 10240/],
];
for (const [name, setup, error] of bad) {
test(`refuses ${name}`, () => assert.throws(() => read(catalog(setup)), error));
}
test("weighted length counts CJK twice", () => {
assert.equal(weighted("abc"), 3);
assert.equal(weighted("漢字"), 4);
});