var tools = el('div', 'thread-tools');
     tools.setAttribute('data-thread-tools', '1');
@@ -629,6 +635,8 @@
         sendBtn.removeAttribute('disabled');
         sendBtn.removeAttribute('aria-disabled');
         sendBtn.removeAttribute('tabindex');
+        sendBtn.removeAttribute('aria-describedby');
+        sendWhy.hidden = true;
         tools.hidden = false;
         tools.removeAttribute('hidden');
         fileBtn.disabled = false;
@@ -655,6 +663,8 @@
         sendBtn.setAttribute('disabled', '');
         sendBtn.setAttribute('aria-disabled', 'true');
         sendBtn.tabIndex = -1;
+        sendBtn.setAttribute('aria-describedby', sendWhy.id);
+        sendWhy.hidden = false;
         tools.hidden = true;
         tools.setAttribute('hidden', '');
         fileBtn.disabled = true;
diff --git a/docs/modules/tree-glow-2b.test.js b/docs/modules/tree-glow-2b.test.js
new file mode 100644
index 0000000..4fcd02d
--- /dev/null
+++ b/docs/modules/tree-glow-2b.test.js
@@ -0,0 +1,60 @@
+#!/usr/bin/env node
+// v-tree-glow-2b-v0: Tree glow 2b. Guards: (1) a hint more frost behind an open place, with
+// a tint fallback and a calm opaque face for reduced transparency; (2) the Desktop / install
+// links are readable on night; (3) header Chat / galaxies and shared shoulder are 14px and
+// readable; (4) a sleeping Send, Ask or Run says why beside it; (5) no "Change" on an empty
+// chair; (6) code mirrors wrap long paths on a phone. No network. No kitchen.
+'use strict';
+
+var fs = require('fs');
+var path = require('path');
+var assert = require('assert');
+
+var css = fs.readFileSync(path.join(__dirname, 'garden-rooms.css'), 'utf8');
+var thread = fs.readFileSync(path.join(__dirname, 'garden-thread.js'), 'utf8');
+var benches = fs.readFileSync(path.join(__dirname, 'workshop-benches.js'), 'utf8');
+
+var at = css.indexOf('v-tree-glow-2b-v0: Tree glow 2b');
+assert.ok(at > 0, 'glow 2b block is in garden-rooms.css');
+var g = css.slice(at);
+
+// (1) frost
+assert.ok(/#place-veil\.is-open::before \{[^}]*position: fixed;[^}]*z-index: -1;[^}]*pointer-events: none;[^}]*backdrop-filter: blur\(2px\)/.test(g), '1: frost glass, never takes a tap');
+assert.ok(/-webkit-backdrop-filter: blur\(2px\)/.test(g), '1: Safari prefix');
+assert.ok(/@supports not \(\(backdrop-filter: blur\(1px\)\) or \(-webkit-backdrop-filter: blur\(1px\)\)\) \{\s*[^}]*background: rgba\(12, 10, 26, 0\.24\)/.test(g), '1: tint fallback');
+assert.ok(/@media \(prefers-reduced-transparency: reduce\) \{\s*#place-veil\.is-open::before \{[^}]*backdrop-filter: none;[^}]*background: rgba\(12, 10, 26, 0\.62\)/.test(g), '1: reduced transparency');
+
+// (2) links
+assert.ok(/#place-veil \.core-note a:visited,[\s\S]*?color: #9fd6ff;[\s\S]*?text-decoration: underline;/.test(g), '2: moon-blue underlined links');
+
+// (3) header + shoulder
+assert.ok(/#garden-header nav \.thread-word \{\s*font-size: 0\.875rem;/.test(g), '3: header words 14px');
+assert.ok(/#garden-header nav \.thread-word \{\s*color: rgba\(214, 222, 238, 0\.86\);/.test(g), '3: header words readable');
+assert.ok(/#shared-shoulder \{\s*font-size: 0\.875rem;[^}]*color: rgba\(214, 222, 238, 0\.8\);/.test(g), '3: shoulder 14px readable');
+assert.ok(/html:has\(#place-veil\.is-open:not\(\.is-core\)\) #shared-shoulder \{\s*visibility: hidden;/.test(g), '3: shoulder rests under other places');
+
+// (4) honest sleeping buttons
+assert.ok(/var sendWhy = el\('p', 'thread-send-why', 'Send sleeps until a mind is remembered in Settings\.'\);/.test(thread), '4: Send says why');
+assert.ok(/sendBtn\.setAttribute\('aria-describedby', sendWhy\.id\);\s*sendWhy\.hidden = false;/.test(thread), '4: shown and described when asleep');
+assert.ok(/sendBtn\.removeAttribute\('aria-describedby'\);\s*sendWhy\.hidden = true;/.test(thread), '4: hidden when awake');
+assert.ok(/var actWhy = el\('p', 'workshop-act-why', 'Ask and Run sleep until a mind is remembered in Settings\.'\);/.test(benches), '4: Ask / Run say why');
+assert.ok(/runBtn\.setAttribute\('aria-describedby', actWhy\.id\);\s*actWhy\.hidden = false;/.test(benches), '4: benches reason when asleep');
+assert.ok(/actWhy\.hidden = true;/.test(benches), '4: benches reason rests when awake');
+assert.ok(/\.thread-compose\.is-closed \{ opacity: 1; \}/.test(g) && /\.thread-compose\.is-closed > :not\(\.thread-send-why\) \{ opacity: 0\.5; \}/.test(g), '4: reason is not dimmed with the sleeping row');
+
+// (5) Change only on a seated chair
+assert.ok(/\.core-chair-change\[hidden\] \{ display: none !important; \}/.test(g), '5: hidden wins');
+
+// (6) code mirrors
+['code-nursery.html', 'code-dialogue.html', 'code-garden.html', 'code-music.html', 'code-round-table.html', 'code-settings.html'].forEach(function (f) {
+  var h = fs.readFileSync(path.join(__dirname, '..', f), 'utf8');
+  if (!/td:first-child/.test(h)) return;
+  assert.ok(/@media \(max-width: 480px\) \{ td:first-child \{ white-space: normal; overflow-wrap: anywhere; \} \}/.test(h), '6: ' + f + ' wraps long paths');
+});
+
+// locks
+var addedJs = (thread.match(/v-tree-glow-2b-v0[\s\S]{0,700}/) || [''])[0] + (benches.match(/v-tree-glow-2b-v0[\s\S]{0,700}/) || [''])[0];
+assert.ok(!/confirm\(|innerHTML/.test(addedJs), 'no confirm(), no innerHTML');
+assert.ok(!/\u2014/.test(g) && !/\u2014/.test(addedJs), 'no em dash in added lines');
+
+console.log('SMOKE_OK tree glow 2b v0.1');
diff --git a/docs/modules/workshop-benches.js b/docs/modules/workshop-benches.js
index 3197300..06122db 100644
--- a/docs/modules/workshop-benches.js
+++ b/docs/modules/workshop-benches.js
@@ -292,6 +292,11 @@
     askForm.appendChild(askInput);
     askForm.appendChild(askActs);
     bench.appendChild(askForm);
+    // v-tree-glow-2b-v0: sleeping Ask and Run say why, right beside them.
+    var actWhy = el('p', 'workshop-act-why', 'Ask and Run sleep until a mind is remembered in Settings.');
+    actWhy.id = 'workshop-act-why-' + Math.random().toString(36).slice(2, 8);
+    actWhy.hidden = true;
+    bench.appendChild(actWhy);
 
     var preview = document.createElement('iframe');
     preview.className = 'workshop-preview';
@@ -349,6 +354,9 @@
         runBtn.disabled = false;
         runBtn.removeAttribute('disabled');
         runBtn.removeAttribute('aria-disabled');
+        askBtn.removeAttribute('aria-describedby');
+        runBtn.removeAttribute('aria-describedby');
+        actWhy.hidden = true;
         later.hidden = false;
         later.removeAttribute('hidden');
         preview.hidden = false;
@@ -384,6 +392,9 @@
         runBtn.disabled = true;
         runBtn.setAttribute('disabled', '');
         runBtn.setAttribute('aria-disabled', 'true');
+        askBtn.setAttribute('aria-describedby', actWhy.id);
+        runBtn.setAttribute('aria-describedby', actWhy.id);
+        actWhy.hidden = false;
         later.hidden = true;
         later.setAttribute('hidden', '');
         preview.hidden = true;