diff --git a/README.md b/README.md
index 1cfc83f..53a55e0 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# shared-memory
+# <img src="docs/assets/lockup.svg" alt="shared-memory" width="283">
 
 A self-hosted MCP server that gives Claude Code sessions a **shared, persistent
 memory** plus a **reusable snippet library**, behind your own OIDC login.
diff --git a/apps/web/app/icon.svg b/apps/web/app/icon.svg
index 6150af7..8b71486 100644
--- a/apps/web/app/icon.svg
+++ b/apps/web/app/icon.svg
@@ -5,12 +5,17 @@
     Three retrieval signals - vector, full-text, tags - converging on a single
     memory. The direct match runs straight through at full strength; the two
     ranked neighbours fall back, which is the fusion the search actually does.
-    Opacity is held equal on the outer pair so the mark stays balanced at 16px.
+
+    Every proportion here is set by the 16px browser-tab case. The outer pair
+    is held at .7 (not .55) because below that it rasterises away entirely,
+    the strokes stop at x=30 so the gap to the node doesn't fill in, and the
+    node is r=8.5 so it still reads as a disc. Geometry is identical to
+    public/logo.svg; only the palette differs.
   -->
   <g fill="none" stroke-linecap="round" stroke-width="7">
-    <path d="M13 15C25 15 26 32 35 32" stroke="#0092fd" opacity=".55"/>
-    <path d="M13 32H35" stroke="#49a9ff"/>
-    <path d="M13 49C25 49 26 32 35 32" stroke="#0092fd" opacity=".55"/>
+    <path d="M12 16C24 16 25 32 30 32" stroke="#0092fd" opacity=".7"/>
+    <path d="M12 32H30" stroke="#49a9ff"/>
+    <path d="M12 48C24 48 25 32 30 32" stroke="#0092fd" opacity=".7"/>
   </g>
-  <circle cx="45" cy="32" r="7.5" fill="#76c0ff"/>
+  <circle cx="46" cy="32" r="8.5" fill="#76c0ff"/>
 </svg>
diff --git a/apps/web/public/lockup.svg b/apps/web/public/lockup.svg
new file mode 100644
index 0000000..21ecd95
--- /dev/null
+++ b/apps/web/public/lockup.svg
@@ -0,0 +1,24 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 283 64" width="283" height="64" role="img" aria-label="shared-memory">
+  <title>shared-memory</title>
+  <!--
+    Horizontal lockup for headers, docs, and the OAuth consent screen, where a
+    bare 64px glyph is too little and the full app header is too much.
+
+    currentColor, so it inherits the surrounding text colour. That does NOT
+    survive being referenced as <img src>, which resolves currentColor to
+    black - use docs/assets/lockup.svg for anything outside the app.
+
+    `textLength` is not decoration: the wordmark is set in whatever monospace
+    the viewer has, and without a locked advance width the text overruns the
+    viewBox on wider fonts.
+  -->
+  <g fill="none" stroke="currentColor" stroke-linecap="round" stroke-width="7">
+    <path d="M12 16C24 16 25 32 30 32" opacity=".7"/>
+    <path d="M12 32H30"/>
+    <path d="M12 48C24 48 25 32 30 32" opacity=".7"/>
+  </g>
+  <circle cx="46" cy="32" r="8.5" fill="currentColor"/>
+  <text x="72" y="41" fill="currentColor" textLength="203" lengthAdjust="spacingAndGlyphs"
+        font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace"
+        font-size="26" letter-spacing="-0.8">shared<tspan opacity=".45">-</tspan>memory</text>
+</svg>
diff --git a/apps/web/public/logo.svg b/apps/web/public/logo.svg
index 2d0a8c2..3b0c153 100644
--- a/apps/web/public/logo.svg
+++ b/apps/web/public/logo.svg
@@ -3,12 +3,20 @@
   <!--
     Transparent, currentColor variant of the mark for in-app use - inherits
     the surrounding text color so it works on any surface. The tile version
-    used as the favicon lives at app/icon.svg.
+    used as the favicon lives at app/icon.svg, and the horizontal lockup at
+    public/lockup.svg.
+
+    Three retrieval signals converging on a single memory. Proportions are
+    set by the 16px case, which is the one that breaks: the strokes stop at
+    x=30 so the gap to the node survives rasterisation, the outer pair sits
+    at .7 rather than .45 so it doesn't drop out, and the node is r=8.5.
+    The earlier proportions rendered as an indeterminate smear in a browser
+    tab.
   -->
   <g fill="none" stroke="currentColor" stroke-linecap="round" stroke-width="7">
-    <path d="M13 15C25 15 27 32 37 32" opacity=".45"/>
-    <path d="M13 32H37"/>
-    <path d="M13 49C25 49 27 32 37 32" opacity=".7"/>
+    <path d="M12 16C24 16 25 32 30 32" opacity=".7"/>
+    <path d="M12 32H30"/>
+    <path d="M12 48C24 48 25 32 30 32" opacity=".7"/>
   </g>
-  <circle cx="43" cy="32" r="8" fill="currentColor"/>
+  <circle cx="46" cy="32" r="8.5" fill="currentColor"/>
 </svg>
diff --git a/docs/assets/lockup.svg b/docs/assets/lockup.svg
new file mode 100644
index 0000000..03e0a7c
--- /dev/null
+++ b/docs/assets/lockup.svg
@@ -0,0 +1,24 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 283 64" width="283" height="64" role="img" aria-label="shared-memory">
+  <title>shared-memory</title>
+  <!--
+    Horizontal lockup for headers, docs, and the OAuth consent screen, where a
+    bare 64px glyph is too little and the full app header is too much.
+
+    Fixed-colour twin of apps/web/public/lockup.svg, for README and any other
+    context that references the file as <img src> - there currentColor resolves
+    to black and vanishes on a dark page. #0092fd holds on both git-host themes.
+
+    `textLength` is not decoration: the wordmark is set in whatever monospace
+    the viewer has, and without a locked advance width the text overruns the
+    viewBox on wider fonts.
+  -->
+  <g fill="none" stroke="#0092fd" stroke-linecap="round" stroke-width="7">
+    <path d="M12 16C24 16 25 32 30 32" opacity=".7"/>
+    <path d="M12 32H30"/>
+    <path d="M12 48C24 48 25 32 30 32" opacity=".7"/>
+  </g>
+  <circle cx="46" cy="32" r="8.5" fill="#0092fd"/>
+  <text x="72" y="41" fill="#0092fd" textLength="203" lengthAdjust="spacingAndGlyphs"
+        font-family="ui-monospace, SFMono-Regular, Menlo, Consolas, monospace"
+        font-size="26" letter-spacing="-0.8">shared<tspan opacity=".45">-</tspan>memory</text>
+</svg>