Facebook Page

facebook-page: visuals for a Facebook Page

Goal: produce the PNG assets of a Facebook Page at the official dimensions (source: Facebook help page 125379114252045), aligned with the guidelines. Two possible visuals, independent of each other:

• profile photo: for an organization, this is the brand (320x320, cropped to a circle by Facebook);
• cover photo: the Page's tall banner (851x315).

This is a specialization of new-template with the Facebook constraints hard-coded. Same conventions: the Template contract (from brand-artisan), assets through brand(), fonts discovered in fonts/, export default ... satisfies Template.

0. Prerequisites (blocking)

The chain project -> template folder -> guidelines must exist before you start:

• Resolve <project> (from the arguments, otherwise ask).
• Check templates/<project>/ and brands/<project>/brand.md.
• Missing guidelines or project -> STOP: ask for /new-project <project> first. No visual without guidelines (CLAUDE.md rule).

1. Frame it

• Which visual(s)? Ask: profile, cover, or both. Don't guess if the user did not say.
• Default slugs: facebook-profile (320x320) and facebook-cover (851x315). Check that the target .tsx does not exist.
• Read brands/<project>/brand.md: palette (hex), type, the logo / favicon variants and their rules depending on the background, and the don'ts.
• If the project already holds a .tsx, read it as a style reference and match its conventions (colors as constants, background effects kept local).

2. Facebook constraints (to respect in the template)

Facebook's official dimensions (do not deviate):

Profile photo

• Size 320x320 (square) for optimal quality. scale: 2 is possible for a crisper render (Facebook resamples anyway).
• Cropped to a circle by Facebook: the visual is square but displays round. Nothing important in the corners (they get cut). Opaque full-bleed background, brand centered.
• It displays small (176 px on desktop, 196 px on mobile, 36 px on basic mobiles): for an organization, use the mark alone / the favicon, not the full wordmark, which would become illegible. Follow brand.md for the variant and the background.

Cover photo

• Size 851x315 (recommended, sRGB). Absolute minimum 400x150. Don't go below it.
• Safe area: the center. Facebook crops the sides on mobile (a 2.4:1 format, so roughly 48 px trimmed from each side) and the desktop display is 16:9. Keep text and logo inside, with a side margin of at least ~60 px.
• Dead zone bottom left (profile photo): on the page, the avatar covers the bottom left of the cover, so any text or logo falling there is hidden. Leave it clear: left margin ~2.5 % of the width, box ~11 % W × ~23 % H anchored bottom left. On 851×315: roughly x 22→116, y 243→315.
• Opaque background, never transparency.

Format and weight (both)

• PNG: Facebook recommends PNG as soon as there is a logo or text (crisper than JPG), which is exactly what the engine outputs.
• < 100 KB for the cover (faster loading). Flat rendering is naturally light: favor the mark as an SVG data-URI, avoid embedding a large raster PNG, don't inflate with scale.

3. Write the template(s)

templates/<project>/<slug>.tsx, with colors as constants taken from the guidelines (invent nothing). Keep the code minimal (principle #2).

Profile (skeleton)

import { readFile } from "node:fs/promises";
import type { ReactNode } from "react";
import { brand, type Template } from "brand-artisan";

const SIZE = { width: 320, height: 320 }; // FB profile, cropped to a circle (scale:2 possible)

// <Project> guideline palette (from brands/<project>/brand.md).
const BRAND = "#......";

// A mark suited to a small round display (the favicon), not the wordmark.
const markSvg = await readFile(brand("<project>/favicon/icon.svg"));
const markSrc = `data:image/svg+xml;base64,${markSvg.toString("base64")}`;

function render(): ReactNode {
	return (
		<div
			style={{
				width: "100%",
				height: "100%",
				display: "flex",
				alignItems: "center",
				justifyContent: "center",
				backgroundColor: BRAND, // opaque full-bleed background (the circle)
			}}
		>
			{/* mark centered, nothing in the corners (outside the circle) */}
			<img src={markSrc} width={188} height={188} alt="" />
		</div>
	);
}

export default { size: SIZE, title: "<Project> Facebook profile photo", render } satisfies Template;

Cover (skeleton)

import type { ReactNode } from "react";
import { brand, type Template } from "brand-artisan";
// import { readFile } from "node:fs/promises"; // if you load the mark

const SIZE = { width: 851, height: 315 }; // FB cover (recommended)

// <Project> guideline palette (from brands/<project>/brand.md).
const INK = "#......";

// Safe area: ~60px side margin (2.4:1 mobile crop), bottom-left corner left clear
// (the profile photo covers it).
const SAFE_X = 60;

function render(): ReactNode {
	return (
		<div
			style={{
				width: "100%",
				height: "100%",
				display: "flex",
				flexDirection: "column",
				justifyContent: "center",
				paddingTop: 40,
				paddingBottom: 40,
				paddingLeft: 200, // leaves the bottom-left corner to the profile photo
				paddingRight: SAFE_X,
				backgroundColor: INK, // opaque background
			}}
		>
			{/* logo + short standfirst, inside the safe area */}
		</div>
	);
}

export default { size: SIZE, title: "<Project> Facebook cover", render } satisfies Template;

Shared conventions: assets through brand("<project>/..."), fonts discovered in fonts/; a missing font -> follow the "missing font" appendix in new-template, never silently.

4. Verify

• npm run typecheck -> green.
• npm run build -> writes out/<project>/<slug>.png.
• Check each PNG: exact dimensions (320x320 / 851x315), opaque background, < 100 KB for the cover.
• Profile: mentally check the circular crop (nothing important in the corners) and legibility at about 36 px.
• Cover: check that nothing important sits in the bottom-left corner or in the ~60 px side margins.
• Preview: npm run dev then /<project>/<slug>.

Success criterion: PNGs at Facebook's exact dimensions, opaque, cover under 100 KB, brand (not wordmark) legible when small for the profile, safe area respected for the cover, and using only colors and type from brand.md.

Appendix: putting the visuals on the Page

Out of the repo's scope (BrandArtisan only makes the image). On the Facebook side:

• Profile photo: Page settings -> Profile photo; check the round rendering and the crop it proposes.
• Cover photo: add the banner; Facebook offers to reposition it; confirm that the text stays visible on mobile (the sides) and that the profile photo hides nothing important in the bottom left.