diff --git a/src/routes/+layout.svelte b/src/routes/+layout.svelte
index eb9ea0b..98981f7 100644
--- a/src/routes/+layout.svelte
+++ b/src/routes/+layout.svelte
@@ -42,6 +42,40 @@
 		<div id="main-content">
 			{@render children()}
 		</div>
+		<footer class="border-t border-border px-4 py-6">
+			<div class="mx-auto flex max-w-3xl flex-col items-center gap-3">
+				<p class="text-center text-xs text-text-secondary">
+					A proof of concept for a real-time multiplayer game on
+					<a href="https://atproto.com" target="_blank" rel="noopener noreferrer" class="text-accent-blue hover:underline">AT Protocol</a>.
+				</p>
+				<div class="flex items-center gap-4">
+					<a
+						href="https://bsky.app/profile/checkmate.blue"
+						target="_blank"
+						rel="noopener noreferrer"
+						class="text-text-secondary transition-colors hover:text-text-primary"
+						aria-label="checkmate.blue on Bluesky"
+					>
+						<svg width="18" height="18" viewBox="0 0 24 24" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
+							<path d="M5.202 2.857C7.954 4.922 10.913 9.11 12 11.358c1.087-2.247 4.046-6.436 6.798-8.501C20.783 1.366 24 .213 24 3.883c0 .732-.42 6.156-.667 7.037-.856 3.061-3.978 3.842-6.755 3.37 4.854.826 6.089 3.562 3.422 6.299-5.065 5.196-7.28-1.304-7.847-2.97-.104-.305-.152-.448-.153-.327 0-.121-.05.022-.153.327-.568 1.666-2.782 8.166-7.847 2.97-2.667-2.737-1.432-5.473 3.422-6.3-2.777.473-5.899-.308-6.755-3.369C.42 10.04 0 4.615 0 3.883c0-3.67 3.217-2.517 5.202-1.026"/>
+						</svg>
+					</a>
+					<a
+						href="https://tangled.sh/checkmate.blue/atchess"
+						target="_blank"
+						rel="noopener noreferrer"
+						class="text-text-secondary transition-colors hover:text-text-primary"
+						aria-label="Source code on Tangled"
+					>
+						<svg width="18" height="18" viewBox="0 0 25 25" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
+							<g transform="translate(-0.429,-0.878)">
+								<path d="m 16.775491,24.987061 c -0.78517,-0.0064 -1.384202,-0.234614 -2.033994,-0.631295 -0.931792,-0.490188 -1.643475,-1.31368 -2.152014,-2.221647 C 11.781409,23.136647 10.701392,23.744942 9.4922931,24.0886 8.9774725,24.238111 8.0757679,24.389777 6.5811304,23.84827 4.4270703,23.124679 2.8580086,20.883331 3.0363279,18.599583 3.0037061,17.652919 3.3488675,16.723769 3.8381157,15.925061 2.5329485,15.224503 1.4686756,14.048584 1.0611184,12.606459 0.81344502,11.816973 0.82385989,10.966486 0.91519098,10.154906 1.2422711,8.2387903 2.6795811,6.5725716 4.5299585,5.9732484 5.2685364,4.290122 6.8802592,3.0349975 8.706276,2.7794663 c 1.2124148,-0.1688264 2.46744,0.084987 3.52811,0.7011837 1.545426,-1.7139736 4.237779,-2.2205077 6.293579,-1.1676231 1.568222,0.7488935 2.689625,2.3113526 2.961888,4.0151464 1.492195,0.5977882 2.749007,1.8168898 3.242225,3.3644951 0.329805,0.9581836 0.340709,2.0135956 0.127128,2.9974286 -0.381606,1.535184 -1.465322,2.842146 -2.868035,3.556463 0.0034,0.273204 0.901506,2.243045 0.751284,3.729647 -0.03281,1.858525 -1.211631,3.619894 -2.846433,4.475452 -0.953967,0.556812 -2.084452,0.546309 -3.120531,0.535398 z m -4.470079,-5.349839 c 1.322246,-0.147248 2.189053,-1.300106 2.862307,-2.338363 0.318287,-0.472954 0.561404,-1.002348 0.803,-1.505815 0.313265,0.287151 0.578698,0.828085 1.074141,0.956909 0.521892,0.162542 1.133743,0.03052 1.45325,-0.443554 0.611414,-1.140449 0.31004,-2.516537 -0.04602,-3.698347 C 18.232844,11.92927 17.945151,11.232927 17.397785,10.751793 17.514522,9.9283111 17.026575,9.0919791 16.332883,8.6609491 15.741721,9.1323278 14.842258,9.1294949 14.271975,8.6252369 13.178927,9.7400102 12.177239,9.7029996 11.209704,8.8195135 10.992255,8.6209543 10.577326,10.031484 9.1211947,9.2324497 8.2846288,9.9333947 7.6359672,10.607693 7.0611981,11.578553 6.5026891,12.62523 5.9177873,13.554793 5.867393,14.69141 c -0.024234,0.66432 0.4948601,1.360337 1.1982269,1.306329 0.702996,0.06277 1.1815208,-0.629091 1.7138087,-0.916491 0.079382,0.927141 0.1688108,1.923227 0.4821259,2.828358 0.3596254,1.171275 1.6262605,1.915695 2.8251855,1.745211 0.08481,-0.0066 0.218672,-0.01769 0.218672,-0.0176 z m 0.686342,-3.497495 c -0.643126,-0.394168 -0.33365,-1.249599 -0.359402,-1.870938 0.064,-0.749774 0.115321,-1.538054 0.452402,-2.221125 0.356724,-0.487008 1.226721,-0.299139 1.265134,0.325689 -0.02558,0.628509 -0.314101,1.25416 -0.279646,1.9057 -0.07482,0.544043 0.05418,1.155133 -0.186476,1.652391 -0.197455,0.275121 -0.599638,0.355105 -0.892012,0.208283 z m -2.808766,-0.358124 c -0.605767,-0.328664 -0.4133176,-1.155655 -0.5083256,-1.73063 0.078762,-0.66567 0.013203,-1.510085 0.5705316,-1.976886 0.545037,-0.380109 1.286917,0.270803 1.029164,0.868384 -0.274913,0.755214 -0.09475,1.580345 -0.08893,2.34609 -0.104009,0.451702 -0.587146,0.691508 -1.002445,0.493042 z"/>
+							</g>
+						</svg>
+					</a>
+				</div>
+			</div>
+		</footer>
 	{/if}
 </main>