diff --git a/zddc/internal/apps/embedded/archive.html b/zddc/internal/apps/embedded/archive.html
index 9cabc22..043fc0c 100644
--- a/zddc/internal/apps/embedded/archive.html
+++ b/zddc/internal/apps/embedded/archive.html
@@ -628,6 +628,28 @@ body.help-open .app-header {
     color: var(--primary);
 }
 
+/* shared/logo.css — paired with shared/logo.js. The wrapping anchor
+   inherits the logo's box and adds a subtle hover/focus affordance
+   so it reads as clickable without altering the logo's visual weight. */
+
+.app-header__logo-link {
+    display: inline-flex;
+    align-items: center;
+    text-decoration: none;
+    border-radius: var(--radius);
+    transition: opacity 0.15s, box-shadow 0.15s;
+}
+
+.app-header__logo-link:hover .app-header__logo,
+.app-header__logo-link:focus-visible .app-header__logo {
+    opacity: 0.82;
+}
+
+.app-header__logo-link:focus-visible {
+    outline: 2px solid var(--primary);
+    outline-offset: 2px;
+}
+
 /* Archive-specific base overrides
    Reset, tokens, and font are provided by shared/base.css */
 
@@ -2245,7 +2267,7 @@ td[data-field="trackingNumber"] {
                 </svg>
                 <div class="header-title-group">
                     <span class="app-header__title">ZDDC Archive</span>
-                    <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · snail-candle-citrus</span></span>
+                    <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · locust-boat-sage</span></span>
                 </div>
                 <button id="addDirectoryBtn" class="btn btn-primary">Add Local Directory</button>
                 <button id="refreshHeaderBtn" class="btn btn-secondary hidden" title="Refresh Data">⟳</button>
@@ -3369,6 +3391,89 @@ https://github.com/nodeca/pako/blob/main/LICENSE
     }
 })();
 
+// shared/logo.js — turn the inert <svg class="app-header__logo"> on
+// every tool's header into a clickable link. The destination is the
+// nearest "home" the user can sensibly back out to:
+//
+//   file://                                     → no wrap (no server home)
+//   http(s)://host/                             → wrap, href = /
+//   http(s)://host/<tool>.html (deployment root)→ wrap, href = /
+//   http(s)://host/<project>/...                → wrap, href = /<project>
+//
+// When inside a project, the logo takes the user to the project
+// landing (synthetic page with the four lifecycle-stage cards + MDL
+// instructions). When at the deployment root, the logo points at /
+// (the project picker). Offline, the logo stays decorative — there's
+// no real "home" to go to.
+//
+// Mounts as a sibling-replacement on DOMContentLoaded: wraps the
+// existing logo SVG in an <a>, preserving classes and attributes.
+// Idempotent: re-mounting on an already-wrapped logo is a no-op.
+//
+// Tools that want to override (e.g. a deployment that pins logo to
+// an external URL) can set window.zddc.logo.disabled = true before
+// DOMContentLoaded and inject their own anchor.
+(function () {
+    'use strict';
+
+    if (!window.zddc) window.zddc = {};
+    if (window.zddc.logo) return;
+
+    function projectSegment(pathname) {
+        var parts = pathname.split('/').filter(Boolean);
+        if (parts.length === 0) return null;
+        var first = parts[0];
+        // Tool HTMLs at the deployment root (index.html, archive.html
+        // with ?projects=...) don't carry a project segment.
+        if (first.indexOf('.') !== -1) return null;
+        return first;
+    }
+
+    function targetHref() {
+        if (typeof location === 'undefined') return null;
+        if (location.protocol !== 'http:' && location.protocol !== 'https:') {
+            return null;
+        }
+        if (window.zddc.logo && window.zddc.logo.disabled) return null;
+        var seg = projectSegment(location.pathname);
+        return seg ? '/' + encodeURIComponent(seg) : '/';
+    }
+
+    function mount() {
+        var logo = document.querySelector('.app-header__logo');
+        if (!logo) return;
+        // Already wrapped (template-supplied anchor, or a previous mount).
+        if (logo.parentElement && logo.parentElement.tagName === 'A' &&
+            logo.parentElement.classList.contains('app-header__logo-link')) {
+            return;
+        }
+        var href = targetHref();
+        if (!href) return;
+        var a = document.createElement('a');
+        a.href = href;
+        a.className = 'app-header__logo-link';
+        var label = href === '/' ? 'ZDDC home' : 'Project home';
+        a.title = label;
+        a.setAttribute('aria-label', label);
+        logo.parentNode.insertBefore(a, logo);
+        a.appendChild(logo);
+    }
+
+    window.zddc.logo = {
+        mount: mount,
+        // Test seam.
+        _projectSegment: projectSegment,
+        _targetHref: targetHref,
+        disabled: false,
+    };
+
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', mount, { once: true });
+    } else {
+        mount();
+    }
+})();
+
 /**
  * ZDDC — shared preview helpers
  *
diff --git a/zddc/internal/apps/embedded/browse.html b/zddc/internal/apps/embedded/browse.html
index 23256cb..9fff068 100644
--- a/zddc/internal/apps/embedded/browse.html
+++ b/zddc/internal/apps/embedded/browse.html
@@ -628,6 +628,28 @@ body.help-open .app-header {
     color: var(--primary);
 }
 
+/* shared/logo.css — paired with shared/logo.js. The wrapping anchor
+   inherits the logo's box and adds a subtle hover/focus affordance
+   so it reads as clickable without altering the logo's visual weight. */
+
+.app-header__logo-link {
+    display: inline-flex;
+    align-items: center;
+    text-decoration: none;
+    border-radius: var(--radius);
+    transition: opacity 0.15s, box-shadow 0.15s;
+}
+
+.app-header__logo-link:hover .app-header__logo,
+.app-header__logo-link:focus-visible .app-header__logo {
+    opacity: 0.82;
+}
+
+.app-header__logo-link:focus-visible {
+    outline: 2px solid var(--primary);
+    outline-offset: 2px;
+}
+
 /* browse-specific layout on top of shared/base.css */
 
 html, body {
@@ -947,7 +969,7 @@ body {
             </svg>
             <div class="header-title-group">
                 <span class="app-header__title">ZDDC Browse</span>
-                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · snail-candle-citrus</span></span>
+                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · locust-boat-sage</span></span>
             </div>
             <button id="addDirectoryBtn" class="btn btn-primary">Add Local Directory</button>
             <button id="refreshHeaderBtn" class="btn btn-secondary hidden" title="Refresh listing" aria-label="Refresh listing">⟳</button>
@@ -1904,6 +1926,89 @@ https://github.com/nodeca/pako/blob/main/LICENSE
     }
 })();
 
+// shared/logo.js — turn the inert <svg class="app-header__logo"> on
+// every tool's header into a clickable link. The destination is the
+// nearest "home" the user can sensibly back out to:
+//
+//   file://                                     → no wrap (no server home)
+//   http(s)://host/                             → wrap, href = /
+//   http(s)://host/<tool>.html (deployment root)→ wrap, href = /
+//   http(s)://host/<project>/...                → wrap, href = /<project>
+//
+// When inside a project, the logo takes the user to the project
+// landing (synthetic page with the four lifecycle-stage cards + MDL
+// instructions). When at the deployment root, the logo points at /
+// (the project picker). Offline, the logo stays decorative — there's
+// no real "home" to go to.
+//
+// Mounts as a sibling-replacement on DOMContentLoaded: wraps the
+// existing logo SVG in an <a>, preserving classes and attributes.
+// Idempotent: re-mounting on an already-wrapped logo is a no-op.
+//
+// Tools that want to override (e.g. a deployment that pins logo to
+// an external URL) can set window.zddc.logo.disabled = true before
+// DOMContentLoaded and inject their own anchor.
+(function () {
+    'use strict';
+
+    if (!window.zddc) window.zddc = {};
+    if (window.zddc.logo) return;
+
+    function projectSegment(pathname) {
+        var parts = pathname.split('/').filter(Boolean);
+        if (parts.length === 0) return null;
+        var first = parts[0];
+        // Tool HTMLs at the deployment root (index.html, archive.html
+        // with ?projects=...) don't carry a project segment.
+        if (first.indexOf('.') !== -1) return null;
+        return first;
+    }
+
+    function targetHref() {
+        if (typeof location === 'undefined') return null;
+        if (location.protocol !== 'http:' && location.protocol !== 'https:') {
+            return null;
+        }
+        if (window.zddc.logo && window.zddc.logo.disabled) return null;
+        var seg = projectSegment(location.pathname);
+        return seg ? '/' + encodeURIComponent(seg) : '/';
+    }
+
+    function mount() {
+        var logo = document.querySelector('.app-header__logo');
+        if (!logo) return;
+        // Already wrapped (template-supplied anchor, or a previous mount).
+        if (logo.parentElement && logo.parentElement.tagName === 'A' &&
+            logo.parentElement.classList.contains('app-header__logo-link')) {
+            return;
+        }
+        var href = targetHref();
+        if (!href) return;
+        var a = document.createElement('a');
+        a.href = href;
+        a.className = 'app-header__logo-link';
+        var label = href === '/' ? 'ZDDC home' : 'Project home';
+        a.title = label;
+        a.setAttribute('aria-label', label);
+        logo.parentNode.insertBefore(a, logo);
+        a.appendChild(logo);
+    }
+
+    window.zddc.logo = {
+        mount: mount,
+        // Test seam.
+        _projectSegment: projectSegment,
+        _targetHref: targetHref,
+        disabled: false,
+    };
+
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', mount, { once: true });
+    } else {
+        mount();
+    }
+})();
+
 /**
  * ZDDC shared help panel — open/close logic.
  * Works with all four tools regardless of their module pattern.
diff --git a/zddc/internal/apps/embedded/classifier.html b/zddc/internal/apps/embedded/classifier.html
index fb83373..5682537 100644
--- a/zddc/internal/apps/embedded/classifier.html
+++ b/zddc/internal/apps/embedded/classifier.html
@@ -628,6 +628,28 @@ body.help-open .app-header {
     color: var(--primary);
 }
 
+/* shared/logo.css — paired with shared/logo.js. The wrapping anchor
+   inherits the logo's box and adds a subtle hover/focus affordance
+   so it reads as clickable without altering the logo's visual weight. */
+
+.app-header__logo-link {
+    display: inline-flex;
+    align-items: center;
+    text-decoration: none;
+    border-radius: var(--radius);
+    transition: opacity 0.15s, box-shadow 0.15s;
+}
+
+.app-header__logo-link:hover .app-header__logo,
+.app-header__logo-link:focus-visible .app-header__logo {
+    opacity: 0.82;
+}
+
+.app-header__logo-link:focus-visible {
+    outline: 2px solid var(--primary);
+    outline-offset: 2px;
+}
+
 /* Classifier-specific base overrides
    Reset, tokens, buttons, and font are provided by shared/base.css */
 
@@ -1464,7 +1486,7 @@ body.help-open .app-header {
                     </svg>
                     <div class="header-title-group">
                         <span class="app-header__title">ZDDC Classifier</span>
-                        <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · snail-candle-citrus</span></span>
+                        <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · locust-boat-sage</span></span>
                     </div>
                     <button id="addDirectoryBtn" class="btn btn-primary">Add Local Directory</button>
                     <button id="refreshHeaderBtn" class="btn btn-secondary hidden" title="Refresh and rescan directory" aria-label="Refresh" style="font-size:1.1rem;">⟳</button>
@@ -2855,6 +2877,89 @@ https://github.com/nodeca/pako/blob/main/LICENSE
     }
 })();
 
+// shared/logo.js — turn the inert <svg class="app-header__logo"> on
+// every tool's header into a clickable link. The destination is the
+// nearest "home" the user can sensibly back out to:
+//
+//   file://                                     → no wrap (no server home)
+//   http(s)://host/                             → wrap, href = /
+//   http(s)://host/<tool>.html (deployment root)→ wrap, href = /
+//   http(s)://host/<project>/...                → wrap, href = /<project>
+//
+// When inside a project, the logo takes the user to the project
+// landing (synthetic page with the four lifecycle-stage cards + MDL
+// instructions). When at the deployment root, the logo points at /
+// (the project picker). Offline, the logo stays decorative — there's
+// no real "home" to go to.
+//
+// Mounts as a sibling-replacement on DOMContentLoaded: wraps the
+// existing logo SVG in an <a>, preserving classes and attributes.
+// Idempotent: re-mounting on an already-wrapped logo is a no-op.
+//
+// Tools that want to override (e.g. a deployment that pins logo to
+// an external URL) can set window.zddc.logo.disabled = true before
+// DOMContentLoaded and inject their own anchor.
+(function () {
+    'use strict';
+
+    if (!window.zddc) window.zddc = {};
+    if (window.zddc.logo) return;
+
+    function projectSegment(pathname) {
+        var parts = pathname.split('/').filter(Boolean);
+        if (parts.length === 0) return null;
+        var first = parts[0];
+        // Tool HTMLs at the deployment root (index.html, archive.html
+        // with ?projects=...) don't carry a project segment.
+        if (first.indexOf('.') !== -1) return null;
+        return first;
+    }
+
+    function targetHref() {
+        if (typeof location === 'undefined') return null;
+        if (location.protocol !== 'http:' && location.protocol !== 'https:') {
+            return null;
+        }
+        if (window.zddc.logo && window.zddc.logo.disabled) return null;
+        var seg = projectSegment(location.pathname);
+        return seg ? '/' + encodeURIComponent(seg) : '/';
+    }
+
+    function mount() {
+        var logo = document.querySelector('.app-header__logo');
+        if (!logo) return;
+        // Already wrapped (template-supplied anchor, or a previous mount).
+        if (logo.parentElement && logo.parentElement.tagName === 'A' &&
+            logo.parentElement.classList.contains('app-header__logo-link')) {
+            return;
+        }
+        var href = targetHref();
+        if (!href) return;
+        var a = document.createElement('a');
+        a.href = href;
+        a.className = 'app-header__logo-link';
+        var label = href === '/' ? 'ZDDC home' : 'Project home';
+        a.title = label;
+        a.setAttribute('aria-label', label);
+        logo.parentNode.insertBefore(a, logo);
+        a.appendChild(logo);
+    }
+
+    window.zddc.logo = {
+        mount: mount,
+        // Test seam.
+        _projectSegment: projectSegment,
+        _targetHref: targetHref,
+        disabled: false,
+    };
+
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', mount, { once: true });
+    } else {
+        mount();
+    }
+})();
+
 /**
  * ZDDC — shared preview helpers
  *
diff --git a/zddc/internal/apps/embedded/index.html b/zddc/internal/apps/embedded/index.html
index 88f7e63..69cb2dc 100644
--- a/zddc/internal/apps/embedded/index.html
+++ b/zddc/internal/apps/embedded/index.html
@@ -628,6 +628,28 @@ body.help-open .app-header {
     color: var(--primary);
 }
 
+/* shared/logo.css — paired with shared/logo.js. The wrapping anchor
+   inherits the logo's box and adds a subtle hover/focus affordance
+   so it reads as clickable without altering the logo's visual weight. */
+
+.app-header__logo-link {
+    display: inline-flex;
+    align-items: center;
+    text-decoration: none;
+    border-radius: var(--radius);
+    transition: opacity 0.15s, box-shadow 0.15s;
+}
+
+.app-header__logo-link:hover .app-header__logo,
+.app-header__logo-link:focus-visible .app-header__logo {
+    opacity: 0.82;
+}
+
+.app-header__logo-link:focus-visible {
+    outline: 2px solid var(--primary);
+    outline-offset: 2px;
+}
+
 /* Landing page layout */
 body {
     margin: 0;
@@ -988,7 +1010,7 @@ body {
             </svg>
             <div class="header-title-group">
                 <span class="app-header__title">ZDDC</span>
-                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · snail-candle-citrus</span></span>
+                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · locust-boat-sage</span></span>
             </div>
         </div>
         <div class="header-right">
@@ -1941,6 +1963,89 @@ body {
     }
 })();
 
+// shared/logo.js — turn the inert <svg class="app-header__logo"> on
+// every tool's header into a clickable link. The destination is the
+// nearest "home" the user can sensibly back out to:
+//
+//   file://                                     → no wrap (no server home)
+//   http(s)://host/                             → wrap, href = /
+//   http(s)://host/<tool>.html (deployment root)→ wrap, href = /
+//   http(s)://host/<project>/...                → wrap, href = /<project>
+//
+// When inside a project, the logo takes the user to the project
+// landing (synthetic page with the four lifecycle-stage cards + MDL
+// instructions). When at the deployment root, the logo points at /
+// (the project picker). Offline, the logo stays decorative — there's
+// no real "home" to go to.
+//
+// Mounts as a sibling-replacement on DOMContentLoaded: wraps the
+// existing logo SVG in an <a>, preserving classes and attributes.
+// Idempotent: re-mounting on an already-wrapped logo is a no-op.
+//
+// Tools that want to override (e.g. a deployment that pins logo to
+// an external URL) can set window.zddc.logo.disabled = true before
+// DOMContentLoaded and inject their own anchor.
+(function () {
+    'use strict';
+
+    if (!window.zddc) window.zddc = {};
+    if (window.zddc.logo) return;
+
+    function projectSegment(pathname) {
+        var parts = pathname.split('/').filter(Boolean);
+        if (parts.length === 0) return null;
+        var first = parts[0];
+        // Tool HTMLs at the deployment root (index.html, archive.html
+        // with ?projects=...) don't carry a project segment.
+        if (first.indexOf('.') !== -1) return null;
+        return first;
+    }
+
+    function targetHref() {
+        if (typeof location === 'undefined') return null;
+        if (location.protocol !== 'http:' && location.protocol !== 'https:') {
+            return null;
+        }
+        if (window.zddc.logo && window.zddc.logo.disabled) return null;
+        var seg = projectSegment(location.pathname);
+        return seg ? '/' + encodeURIComponent(seg) : '/';
+    }
+
+    function mount() {
+        var logo = document.querySelector('.app-header__logo');
+        if (!logo) return;
+        // Already wrapped (template-supplied anchor, or a previous mount).
+        if (logo.parentElement && logo.parentElement.tagName === 'A' &&
+            logo.parentElement.classList.contains('app-header__logo-link')) {
+            return;
+        }
+        var href = targetHref();
+        if (!href) return;
+        var a = document.createElement('a');
+        a.href = href;
+        a.className = 'app-header__logo-link';
+        var label = href === '/' ? 'ZDDC home' : 'Project home';
+        a.title = label;
+        a.setAttribute('aria-label', label);
+        logo.parentNode.insertBefore(a, logo);
+        a.appendChild(logo);
+    }
+
+    window.zddc.logo = {
+        mount: mount,
+        // Test seam.
+        _projectSegment: projectSegment,
+        _targetHref: targetHref,
+        disabled: false,
+    };
+
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', mount, { once: true });
+    } else {
+        mount();
+    }
+})();
+
 /**
  * ZDDC shared help panel — open/close logic.
  * Works with all four tools regardless of their module pattern.
diff --git a/zddc/internal/apps/embedded/mdedit.html b/zddc/internal/apps/embedded/mdedit.html
index df91c90..1807d3a 100644
--- a/zddc/internal/apps/embedded/mdedit.html
+++ b/zddc/internal/apps/embedded/mdedit.html
@@ -848,6 +848,28 @@ body.help-open .app-header {
     color: var(--primary);
 }
 
+/* shared/logo.css — paired with shared/logo.js. The wrapping anchor
+   inherits the logo's box and adds a subtle hover/focus affordance
+   so it reads as clickable without altering the logo's visual weight. */
+
+.app-header__logo-link {
+    display: inline-flex;
+    align-items: center;
+    text-decoration: none;
+    border-radius: var(--radius);
+    transition: opacity 0.15s, box-shadow 0.15s;
+}
+
+.app-header__logo-link:hover .app-header__logo,
+.app-header__logo-link:focus-visible .app-header__logo {
+    opacity: 0.82;
+}
+
+.app-header__logo-link:focus-visible {
+    outline: 2px solid var(--primary);
+    outline-offset: 2px;
+}
+
 /* mdedit component styles — reset and tokens from shared/base.css */
 
 /* Pane resizer */
@@ -1903,7 +1925,7 @@ body.help-open .app-header {
                 </svg>
                 <div class="header-title-group">
                     <span class="app-header__title">ZDDC Markdown</span>
-                    <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · snail-candle-citrus</span></span>
+                    <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · locust-boat-sage</span></span>
                 </div>
                 <button id="addDirectoryBtn" class="btn btn-primary" title="Add a local directory">Add Local Directory</button>
                 <button id="refreshHeaderBtn" class="btn btn-secondary hidden" title="Refresh directory" aria-label="Refresh">⟳</button>
@@ -3094,6 +3116,89 @@ body.help-open .app-header {
     }
 })();
 
+// shared/logo.js — turn the inert <svg class="app-header__logo"> on
+// every tool's header into a clickable link. The destination is the
+// nearest "home" the user can sensibly back out to:
+//
+//   file://                                     → no wrap (no server home)
+//   http(s)://host/                             → wrap, href = /
+//   http(s)://host/<tool>.html (deployment root)→ wrap, href = /
+//   http(s)://host/<project>/...                → wrap, href = /<project>
+//
+// When inside a project, the logo takes the user to the project
+// landing (synthetic page with the four lifecycle-stage cards + MDL
+// instructions). When at the deployment root, the logo points at /
+// (the project picker). Offline, the logo stays decorative — there's
+// no real "home" to go to.
+//
+// Mounts as a sibling-replacement on DOMContentLoaded: wraps the
+// existing logo SVG in an <a>, preserving classes and attributes.
+// Idempotent: re-mounting on an already-wrapped logo is a no-op.
+//
+// Tools that want to override (e.g. a deployment that pins logo to
+// an external URL) can set window.zddc.logo.disabled = true before
+// DOMContentLoaded and inject their own anchor.
+(function () {
+    'use strict';
+
+    if (!window.zddc) window.zddc = {};
+    if (window.zddc.logo) return;
+
+    function projectSegment(pathname) {
+        var parts = pathname.split('/').filter(Boolean);
+        if (parts.length === 0) return null;
+        var first = parts[0];
+        // Tool HTMLs at the deployment root (index.html, archive.html
+        // with ?projects=...) don't carry a project segment.
+        if (first.indexOf('.') !== -1) return null;
+        return first;
+    }
+
+    function targetHref() {
+        if (typeof location === 'undefined') return null;
+        if (location.protocol !== 'http:' && location.protocol !== 'https:') {
+            return null;
+        }
+        if (window.zddc.logo && window.zddc.logo.disabled) return null;
+        var seg = projectSegment(location.pathname);
+        return seg ? '/' + encodeURIComponent(seg) : '/';
+    }
+
+    function mount() {
+        var logo = document.querySelector('.app-header__logo');
+        if (!logo) return;
+        // Already wrapped (template-supplied anchor, or a previous mount).
+        if (logo.parentElement && logo.parentElement.tagName === 'A' &&
+            logo.parentElement.classList.contains('app-header__logo-link')) {
+            return;
+        }
+        var href = targetHref();
+        if (!href) return;
+        var a = document.createElement('a');
+        a.href = href;
+        a.className = 'app-header__logo-link';
+        var label = href === '/' ? 'ZDDC home' : 'Project home';
+        a.title = label;
+        a.setAttribute('aria-label', label);
+        logo.parentNode.insertBefore(a, logo);
+        a.appendChild(logo);
+    }
+
+    window.zddc.logo = {
+        mount: mount,
+        // Test seam.
+        _projectSegment: projectSegment,
+        _targetHref: targetHref,
+        disabled: false,
+    };
+
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', mount, { once: true });
+    } else {
+        mount();
+    }
+})();
+
 /**
  * ZDDC — shared preview helpers
  *
diff --git a/zddc/internal/apps/embedded/transmittal.html b/zddc/internal/apps/embedded/transmittal.html
index d352741..04742ab 100644
--- a/zddc/internal/apps/embedded/transmittal.html
+++ b/zddc/internal/apps/embedded/transmittal.html
@@ -632,6 +632,28 @@ body.help-open .app-header {
     color: var(--primary);
 }
 
+/* shared/logo.css — paired with shared/logo.js. The wrapping anchor
+   inherits the logo's box and adds a subtle hover/focus affordance
+   so it reads as clickable without altering the logo's visual weight. */
+
+.app-header__logo-link {
+    display: inline-flex;
+    align-items: center;
+    text-decoration: none;
+    border-radius: var(--radius);
+    transition: opacity 0.15s, box-shadow 0.15s;
+}
+
+.app-header__logo-link:hover .app-header__logo,
+.app-header__logo-link:focus-visible .app-header__logo {
+    opacity: 0.82;
+}
+
+.app-header__logo-link:focus-visible {
+    outline: 2px solid var(--primary);
+    outline-offset: 2px;
+}
+
 /* Placeholder for contenteditable elements */
 [data-placeholder]:empty::before {
     content: attr(data-placeholder);
@@ -2263,7 +2285,7 @@ dialog.modal--narrow {
             </svg>
             <div class="header-title-group">
                 <span class="app-header__title">ZDDC Transmittal</span>
-                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · snail-candle-citrus</span></span>
+                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · locust-boat-sage</span></span>
             </div>
             <span id="no-js-notice" class="text-gray-400 text-xs italic">JavaScript not available</span>
             <!-- Publish split-button (Transmittal-specific primary action;
@@ -3874,6 +3896,89 @@ https://github.com/nodeca/pako/blob/main/LICENSE
     }
 })();
 
+// shared/logo.js — turn the inert <svg class="app-header__logo"> on
+// every tool's header into a clickable link. The destination is the
+// nearest "home" the user can sensibly back out to:
+//
+//   file://                                     → no wrap (no server home)
+//   http(s)://host/                             → wrap, href = /
+//   http(s)://host/<tool>.html (deployment root)→ wrap, href = /
+//   http(s)://host/<project>/...                → wrap, href = /<project>
+//
+// When inside a project, the logo takes the user to the project
+// landing (synthetic page with the four lifecycle-stage cards + MDL
+// instructions). When at the deployment root, the logo points at /
+// (the project picker). Offline, the logo stays decorative — there's
+// no real "home" to go to.
+//
+// Mounts as a sibling-replacement on DOMContentLoaded: wraps the
+// existing logo SVG in an <a>, preserving classes and attributes.
+// Idempotent: re-mounting on an already-wrapped logo is a no-op.
+//
+// Tools that want to override (e.g. a deployment that pins logo to
+// an external URL) can set window.zddc.logo.disabled = true before
+// DOMContentLoaded and inject their own anchor.
+(function () {
+    'use strict';
+
+    if (!window.zddc) window.zddc = {};
+    if (window.zddc.logo) return;
+
+    function projectSegment(pathname) {
+        var parts = pathname.split('/').filter(Boolean);
+        if (parts.length === 0) return null;
+        var first = parts[0];
+        // Tool HTMLs at the deployment root (index.html, archive.html
+        // with ?projects=...) don't carry a project segment.
+        if (first.indexOf('.') !== -1) return null;
+        return first;
+    }
+
+    function targetHref() {
+        if (typeof location === 'undefined') return null;
+        if (location.protocol !== 'http:' && location.protocol !== 'https:') {
+            return null;
+        }
+        if (window.zddc.logo && window.zddc.logo.disabled) return null;
+        var seg = projectSegment(location.pathname);
+        return seg ? '/' + encodeURIComponent(seg) : '/';
+    }
+
+    function mount() {
+        var logo = document.querySelector('.app-header__logo');
+        if (!logo) return;
+        // Already wrapped (template-supplied anchor, or a previous mount).
+        if (logo.parentElement && logo.parentElement.tagName === 'A' &&
+            logo.parentElement.classList.contains('app-header__logo-link')) {
+            return;
+        }
+        var href = targetHref();
+        if (!href) return;
+        var a = document.createElement('a');
+        a.href = href;
+        a.className = 'app-header__logo-link';
+        var label = href === '/' ? 'ZDDC home' : 'Project home';
+        a.title = label;
+        a.setAttribute('aria-label', label);
+        logo.parentNode.insertBefore(a, logo);
+        a.appendChild(logo);
+    }
+
+    window.zddc.logo = {
+        mount: mount,
+        // Test seam.
+        _projectSegment: projectSegment,
+        _targetHref: targetHref,
+        disabled: false,
+    };
+
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', mount, { once: true });
+    } else {
+        mount();
+    }
+})();
+
 /**
  * ZDDC — shared preview helpers
  *
diff --git a/zddc/internal/apps/embedded/versions.txt b/zddc/internal/apps/embedded/versions.txt
index e166693..6e54536 100644
--- a/zddc/internal/apps/embedded/versions.txt
+++ b/zddc/internal/apps/embedded/versions.txt
@@ -1,9 +1,9 @@
 # Generated by build.sh — do not edit. One <app>=<build label> per line.
-archive=v0.0.17-beta · 2026-05-10 · snail-candle-citrus
-transmittal=v0.0.17-beta · 2026-05-10 · snail-candle-citrus
-classifier=v0.0.17-beta · 2026-05-10 · snail-candle-citrus
-mdedit=v0.0.17-beta · 2026-05-10 · snail-candle-citrus
-landing=v0.0.17-beta · 2026-05-10 · snail-candle-citrus
-form=v0.0.17-beta · 2026-05-10 · snail-candle-citrus
-tables=v0.0.17-beta · 2026-05-10 · snail-candle-citrus
-browse=v0.0.17-beta · 2026-05-10 · snail-candle-citrus
+archive=v0.0.17-beta · 2026-05-10 · locust-boat-sage
+transmittal=v0.0.17-beta · 2026-05-10 · locust-boat-sage
+classifier=v0.0.17-beta · 2026-05-10 · locust-boat-sage
+mdedit=v0.0.17-beta · 2026-05-10 · locust-boat-sage
+landing=v0.0.17-beta · 2026-05-10 · locust-boat-sage
+form=v0.0.17-beta · 2026-05-10 · locust-boat-sage
+tables=v0.0.17-beta · 2026-05-10 · locust-boat-sage
+browse=v0.0.17-beta · 2026-05-10 · locust-boat-sage
diff --git a/zddc/internal/handler/tables.html b/zddc/internal/handler/tables.html
index f398eee..6a97a90 100644
--- a/zddc/internal/handler/tables.html
+++ b/zddc/internal/handler/tables.html
@@ -1092,7 +1092,7 @@ body.help-open .app-header {
             </svg>
             <div class="header-title-group">
                 <span class="app-header__title" id="table-title">ZDDC Table</span>
-                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-alpha · 2026-05-10 12:33:10 · 837cf47-dirty</span></span>
+                <span class="build-timestamp"><span style="color:red;font-weight:bold">v0.0.17-beta · 2026-05-10 · locust-boat-sage</span></span>
             </div>
         </div>
         <div class="header-right">