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diff --git a/claude-design/design_handoff_sethmux_toolbar/README.md b/claude-design/design_handoff_sethmux_toolbar/README.md
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+# Handoff: sethmux mobile toolbar — Google Workspace dark refresh + compose bar
+
+## Overview
+
+This handoff covers two related changes to the sethmux web terminal's mobile UI (`static/toolbar.js`):
+
+1. **Theme refresh** — re-skin the existing 2-row mobile button bar to match the Google Workspace dark vocabulary (palette, typography, hairline borders, hover behavior) while keeping sethmux's orange `#D35400` as the accent identity.
+2. **Mobile autocorrect workaround** — add an opt-in compose bar (third row, toggled by a "Type" button) that gives Gboard / iOS keyboards a real `<input>` to operate on. Typed text is flushed to the terminal stdin on Enter / Send so swipe, autocorrect, and predictions all work despite xterm.js's per-keystroke input model.
+
+## About the Design Files
+
+The files in this bundle are **design references** — `toolbar.js` is the single source file to ship; the `preview*.html` files are visual mockups demonstrating intended look and behavior in a Chrome window and an Android phone frame, and the `*.jsx` files are throwaway frame components used only by the previews.
+
+The task is to drop the new `toolbar.js` into the existing sethmux project at `static/toolbar.js`, replacing the current file. No build step required; no other static files change. The previews are not meant to be served in production.
+
+## Fidelity
+
+**High-fidelity.** All colors, type sizes, spacings, radii, and behaviors are final. Implement to spec.
+
+## What changed in toolbar.js
+
+### Visual system (Google Workspace dark)
+
+| Token            | Hex       | Usage                                         |
+|------------------|-----------|-----------------------------------------------|
+| toolbar bg       | `#202124` | bar background                                |
+| button surface   | `#303134` | button face at rest                           |
+| border           | `#3c4043` | 1px hairlines, group dividers                 |
+| primary text     | `#e8eaed` | button labels                                 |
+| secondary text   | `#9aa0a6` | mono-class buttons at rest                    |
+| tertiary text    | `#5f6368` | placeholder, disabled                         |
+| accent (sethmux) | `#D35400` | active/toggled fill, send button, focus ring  |
+| accent at rest   | `#f0a36b` | text color of `.hi` (orange-tinted) buttons   |
+| accent bg-1      | `#2a1f15` | `.hi` button background at rest               |
+| accent bg-2      | `#3a2a1a` | hover wash (subtle orange tint)               |
+| accent border    | `#5a3a22` | `.hi` border at rest                          |
+| success at rest  | `#81c995` | Save button text                              |
+| success filled   | `#1e8e3e` | Save button after confirm                     |
+
+### Typography
+
+- Primary: `Roboto, 'Helvetica Neue', Arial, sans-serif`, 12px / 500, letter-spacing 0.1px
+- Mono (chord and arrow keys, terminal input): `'Roboto Mono', 'SF Mono', ui-monospace, Menlo, Consolas, monospace`, 14px / 400 in the compose input, 12px / 400 on `.mono` buttons
+
+### Geometry
+
+- Bar padding: `6px 8px 7px`
+- Button: `height: 32px`, `min-width: 40px`, `padding: 0 10px`, `border-radius: 4px`, `border: 1px solid #3c4043`
+- Narrow-phone breakpoint at `max-width: 380px`: button `height: 30px`, `min-width: 34px`, `padding: 0 7px`, `font-size: 11.5px`
+- Compose input: `height: 36px`, `padding: 0 10px`, `border-radius: 4px`, orange caret + orange focus border `#D35400`
+- Send button: `height: 36px`, `min-width: 54px`, filled `#D35400` on text `#0a0a0a`
+- Newline button (`↵`): same height as Send, `min-width: 38px`, neutral surface (`#303134` / `#3c4043`)
+- Group dividers (`.sep`): 1px wide × 20px tall, `#3c4043`, 4px horizontal margin (2px on narrow phones)
+- Bar shadow: `0 -1px 0 rgba(0,0,0,.4), 0 -8px 24px rgba(0,0,0,.35)`
+- Transitions: `background .15s ease, border-color .15s ease, color .15s ease` (no bounces)
+
+### Button states
+
+- Default: `#303134` bg, `#3c4043` border, `#e8eaed` text
+- Hover: `#3a2a1a` bg, `#fff` text
+- Active (mouse-down): full orange fill `#D35400` on `#0a0a0a`
+- `.hi` (accent at rest): orange-tinted bg `#2a1f15`, border `#5a3a22`, text `#f0a36b`. Hover deepens both
+- `.on` (toggled, e.g. selection mode active, Type active): full `#D35400` fill, hover lightens to `#e26416`
+- `.mono` (chord keys): mono font, `#9aa0a6` text → `#e8eaed` on hover
+- `.grn` (Save): `#81c995` text at rest; `.grn.on` (post-confirm) fills `#1e8e3e` and shows "✓ Saved" for 1500ms
+
+### Layout / structure
+
+The bar is a single `position: fixed; bottom: 0` element with `flex-direction: column`.
+
+**Row 1** (always visible):
+```
+[+ Tab] [Next] [Prev]  |  [^C] [^D] [Clr]  |  [Esc] [Tab] [▲] [▼]
+```
+- `+ Tab` is `.hi`, the rest neutral, `^C ^D Esc Tab ▲ ▼` are `.mono`.
+
+**Row 2** (always visible):
+```
+[Sel] [Paste] [Zoom] [Save]  |  [V.Spl] [H.Spl] [Pane] [Kill]  |  [Type]
+```
+- `Sel`, `Paste`, `Type` are `.hi`. `Save` is `.grn`. The `Type` button is the new entry point for the compose bar.
+
+**Row 3 — compose** (only visible when `#mb` has class `composing`):
+```
+[          input field           ] [↵] [Send]
+```
+- The input is full-width-flex, monospace, autocorrect on. `↵` and `Send` both flush.
+
+### Interactions / behavior
+
+**Send to stdin (`send(k)`):** unchanged. Tries `term._core.coreService.triggerDataEvent(k)` first, falls back to `term._core._onData.fire(k)`, then `term.input(k)`. Always re-focuses the terminal afterward.
+
+**Selection mode (`Sel`):** unchanged. Toggles `body.selmode` which adds `pointer-events: none` to `.xterm-screen` and forces text selection. While in selmode the body also gets `filter: brightness(.92)` for a subtle visual cue. Sending any key auto-exits selmode.
+
+**Paste:** unchanged. Reads `navigator.clipboard.readText()` and feeds the result through `send()`. Alerts if HTTPS clipboard is unavailable.
+
+**Save:** unchanged behavior — sends `\x01S` (`Ctrl-A S`, the tmux capture binding). Adds the `.on` class and label `✓ Saved` for 1500ms, then reverts.
+
+**Compose / Type (new):**
+- Tapping `Type` toggles the `composing` class on `#mb`.
+- On open, `#mb-compose` gets focused via `setTimeout(...,0)` so iOS/Android keyboards open reliably.
+- Input attributes: `autocomplete="on" autocorrect="on" autocapitalize="sentences" spellcheck="true" enterkeyhint="send" inputmode="text"`. These are required — the whole point is to let the OS keyboard's correction layer mutate the input value, which xterm.js's hidden textarea cannot do.
+- Pressing `Enter` (or tapping `Send` or `↵`) calls `flushCompose(true)`: reads the input value, clears it, sends the value as a string to stdin, then sends `\r`. Re-focuses the input so the user can keep typing.
+- Other toolbar buttons remain active while composing. If a chord/arrow/etc. button is tapped with non-empty input text, the typed text is flushed first (preserving order), then the chord is sent. **The compose bar stays open**; the user is mid-thought.
+
+**Layout reflow (`relayout()`):** The terminal pane (`.xterm`) is sized via `height: calc(100vh - {barHeight + 4}px)` whenever the bar's height changes. This runs on:
+- DOM mutations (existing `MutationObserver`)
+- Window resize
+- Toggling the `composing` class (called from `toggleType()`)
+
+The previous implementation hard-coded `calc(100vh - 92px)`; the new code measures `bar.offsetHeight` so opening the third row reflows correctly without overlap.
+
+**Helper textarea hardening:** unchanged. Still sets `autocomplete=off`, `autocorrect=off`, `autocapitalize=off`, `spellcheck=false` on `.xterm-helper-textarea` once it appears. This is the standard xterm.js mitigation and is still useful — it prevents Gboard from trying to munge the per-keystroke stream when the user happens to type *outside* the compose bar.
+
+### Mobile breakpoint
+
+The toolbar shows at `@media (max-width: 900px)`. Unchanged. Above that, sethmux assumes a real keyboard and the bar stays hidden.
+
+## Why the compose bar is necessary
+
+xterm.js reads from a hidden `<textarea>` and forwards `keydown` / `keypress` events plus IME `compositionstart` / `compositionend` to the terminal's data event one keystroke at a time. Mobile keyboards' autocorrect, swipe input, and word predictions don't fire per-key events — they replace the textarea's `.value` in bulk via `input` events with `inputType: "insertReplacementText"` or `"insertCompositionText"`. xterm.js's input handler discards those, so corrections silently fail. The compose bar sidesteps this by giving the OS keyboard a real text field, then sending the assembled string in one shot.
+
+## Files in this bundle
+
+| File                       | Purpose                                                           |
+|----------------------------|-------------------------------------------------------------------|
+| `toolbar.js`               | **Ship this.** Drop into `static/toolbar.js`.                     |
+| `preview.html`             | Minimal mock terminal + the live `toolbar.js` for in-browser test |
+| `preview-desktop.html`     | Chrome window mock showing the full sethmux UI with tmux tabs    |
+| `preview-mobile.html`      | Two Android frames: collapsed state + compose-open state          |
+| `browser-window.jsx`       | Used only by `preview-desktop.html`                              |
+| `android-frame.jsx`        | Used only by `preview-mobile.html`                               |
+
+## Acceptance checklist
+
+- [ ] Bar appears only at viewport widths ≤ 900px.
+- [ ] All 20 original buttons present and bound to the same key sequences.
+- [ ] `Type` button toggles a third row with input + `↵` + `Send`.
+- [ ] Pressing Enter inside the input sends the typed text plus `\r` and clears the field.
+- [ ] Tapping any other toolbar button while composing flushes the typed text first, then sends the button's key. Compose bar stays open.
+- [ ] Terminal pane `height` reflows when the bar grows/shrinks; nothing overlaps.
+- [ ] Autocorrect / swipe / predictions work in the compose input on Gboard and iOS.
+- [ ] Save button shows `✓ Saved` filled green for 1500ms after tap.
+- [ ] Sel button toggles to `Done` (filled orange) and dims the terminal slightly.
+- [ ] No console errors; `window._toolbar` guards against double-init.
diff --git a/claude-design/design_handoff_sethmux_toolbar/android-frame.jsx b/claude-design/design_handoff_sethmux_toolbar/android-frame.jsx
new file mode 100644
index 0000000..2dc0eb8
--- /dev/null
+++ b/claude-design/design_handoff_sethmux_toolbar/android-frame.jsx
@@ -0,0 +1,214 @@
+
+// Android.jsx — Simplified Android (Material 3) device frame
+// Status bar + top app bar + content + gesture nav + keyboard.
+// Based on Figma M3 spec. No dependencies, no image assets.
+
+const MD_C = {
+  surface: '#f4fbf8',
+  surfaceVariant: '#dae5e1',
+  inverseOnSurface: '#ecf2ef',
+  secondaryContainer: '#cde8e1',
+  primaryFixedDim: '#83d5c6',
+  onSurface: '#171d1b',
+  onSurfaceVar: '#49454f',
+  onPrimaryContainer: '#00201c',
+  primary: '#006a60',
+  frameBorder: 'rgba(116,119,117,0.5)',
+};
+
+// ─────────────────────────────────────────────────────────────
+// Status bar (time left, wifi/cell/battery right)
+// ─────────────────────────────────────────────────────────────
+function AndroidStatusBar({ dark = false }) {
+  const c = dark ? '#fff' : MD_C.onSurface;
+  return (
+    <div style={{
+      height: 40, display: 'flex', alignItems: 'center',
+      justifyContent: 'space-between', padding: '0 16px',
+      position: 'relative',
+      fontFamily: 'Roboto, system-ui, sans-serif',
+    }}>
+      {/* time left */}
+      <div style={{ width: 128, display: 'flex', alignItems: 'center', gap: 8 }}>
+        <span style={{ fontSize: 14, fontWeight: 400, letterSpacing: 0.25, lineHeight: '20px', color: c }}>9:30</span>
+      </div>
+      {/* camera punch-hole (center) */}
+      <div style={{
+        position: 'absolute', left: '50%', top: 8, transform: 'translateX(-50%)',
+        width: 24, height: 24, borderRadius: 100, background: '#2e2e2e',
+      }} />
+      {/* status icons right */}
+      <div style={{ display: 'flex', alignItems: 'center' }}>
+        <div style={{ display: 'flex', paddingRight: 2 }}>
+          <svg width="16" height="16" viewBox="0 0 16 16" style={{ marginRight: -2 }}>
+            <path d="M8 13.3L.67 5.97a10.37 10.37 0 0114.66 0L8 13.3z" fill={c}/>
+          </svg>
+          <svg width="16" height="16" viewBox="0 0 16 16" style={{ marginRight: -2 }}>
+            <path d="M14.67 14.67V1.33L1.33 14.67h13.34z" fill={c}/>
+          </svg>
+        </div>
+        <svg width="16" height="16" viewBox="0 0 16 16">
+          <rect x="3.75" y="2" width="8.5" height="13" rx="1.5" fill={c}/>
+          <rect x="5.5" y="0.9" width="5" height="2" rx="0.5" fill={c}/>
+        </svg>
+      </div>
+    </div>
+  );
+}
+
+// ─────────────────────────────────────────────────────────────
+// Top app bar (Material 3 small/medium)
+// ─────────────────────────────────────────────────────────────
+function AndroidAppBar({ title = 'Title', large = false }) {
+  const iconDot = (
+    <div style={{
+      width: 48, height: 48, display: 'flex', alignItems: 'center', justifyContent: 'center',
+    }}>
+      <div style={{ width: 22, height: 22, borderRadius: '50%', background: MD_C.onSurfaceVar, opacity: 0.3 }} />
+    </div>
+  );
+  return (
+    <div style={{ background: MD_C.surface, padding: '4px 4px 0' }}>
+      <div style={{ height: 56, display: 'flex', alignItems: 'center', gap: 4 }}>
+        {iconDot}
+        {!large && (
+          <span style={{
+            flex: 1, fontSize: 22, fontWeight: 400, color: MD_C.onSurface,
+            fontFamily: 'Roboto, system-ui, sans-serif',
+          }}>{title}</span>
+        )}
+        {large && <div style={{ flex: 1 }} />}
+        {iconDot}
+      </div>
+      {large && (
+        <div style={{
+          padding: '16px 16px 20px',
+          fontSize: 28, fontWeight: 400, color: MD_C.onSurface,
+          fontFamily: 'Roboto, system-ui, sans-serif',
+        }}>{title}</div>
+      )}
+    </div>
+  );
+}
+
+// ─────────────────────────────────────────────────────────────
+// List item (Material 3)
+// ─────────────────────────────────────────────────────────────
+function AndroidListItem({ headline, supporting, leading }) {
+  return (
+    <div style={{
+      display: 'flex', alignItems: 'center', gap: 16,
+      padding: '12px 16px', minHeight: 56, boxSizing: 'border-box',
+      fontFamily: 'Roboto, system-ui, sans-serif',
+    }}>
+      {leading && (
+        <div style={{
+          width: 40, height: 40, borderRadius: '50%',
+          background: MD_C.primary, color: '#fff',
+          display: 'flex', alignItems: 'center', justifyContent: 'center',
+          fontSize: 18, fontWeight: 500, flexShrink: 0,
+        }}>{leading}</div>
+      )}
+      <div style={{ flex: 1, minWidth: 0 }}>
+        <div style={{ fontSize: 16, color: MD_C.onSurface, lineHeight: '24px' }}>{headline}</div>
+        {supporting && (
+          <div style={{ fontSize: 14, color: MD_C.onSurfaceVar, lineHeight: '20px' }}>{supporting}</div>
+        )}
+      </div>
+    </div>
+  );
+}
+
+// ─────────────────────────────────────────────────────────────
+// Gesture nav bar (pill)
+// ─────────────────────────────────────────────────────────────
+function AndroidNavBar({ dark = false }) {
+  return (
+    <div style={{
+      height: 24, display: 'flex', alignItems: 'center', justifyContent: 'center',
+    }}>
+      <div style={{
+        width: 108, height: 4, borderRadius: 2,
+        background: dark ? '#fff' : MD_C.onSurface, opacity: 0.4,
+      }} />
+    </div>
+  );
+}
+
+// ─────────────────────────────────────────────────────────────
+// Device frame — wraps everything
+// ─────────────────────────────────────────────────────────────
+function AndroidDevice({
+  children, width = 412, height = 892, dark = false,
+  title, large = false, keyboard = false,
+}) {
+  return (
+    <div style={{
+      width, height, borderRadius: 18, overflow: 'hidden',
+      background: dark ? '#1d1b20' : MD_C.surface,
+      border: `8px solid ${MD_C.frameBorder}`,
+      boxShadow: '0 30px 80px rgba(0,0,0,0.25)',
+      display: 'flex', flexDirection: 'column', boxSizing: 'border-box',
+    }}>
+      <AndroidStatusBar dark={dark} />
+      {title !== undefined && <AndroidAppBar title={title} large={large} />}
+      <div style={{ flex: 1, overflow: 'auto' }}>
+        {children}
+      </div>
+      {keyboard && <AndroidKeyboard />}
+      <AndroidNavBar dark={dark} />
+    </div>
+  );
+}
+
+// ─────────────────────────────────────────────────────────────
+// Keyboard — Gboard (Material 3)
+// ─────────────────────────────────────────────────────────────
+function AndroidKeyboard() {
+  let _k = 0;
+  const key = (l, { flex = 1, bg = MD_C.surface, r = 6, minW, fs = 21 } = {}) => (
+    <div key={_k++} style={{
+      height: 46, borderRadius: r, flex, minWidth: minW,
+      background: bg, display: 'flex', alignItems: 'center', justifyContent: 'center',
+      fontFamily: 'Roboto, system-ui', fontSize: fs,
+      color: MD_C.onPrimaryContainer,
+    }}>{l}</div>
+  );
+  const row = (keys, style = {}) => (
+    <div style={{ display: 'flex', gap: 6, justifyContent: 'center', ...style }}>
+      {keys.map(l => key(l))}
+    </div>
+  );
+  return (
+    <div style={{
+      background: MD_C.inverseOnSurface, padding: '0 8px 8px',
+      display: 'flex', flexDirection: 'column', gap: 4,
+    }}>
+      {/* navbar spacer (icons omitted) */}
+      <div style={{ height: 44 }} />
+      {/* key rows */}
+      <div style={{ display: 'flex', flexDirection: 'column', gap: 12 }}>
+        {row(['q','w','e','r','t','y','u','i','o','p'])}
+        {row(['a','s','d','f','g','h','j','k','l'], { padding: '0 20px' })}
+        <div style={{ display: 'flex', gap: 6 }}>
+          {key('', { bg: MD_C.surfaceVariant })}
+          <div style={{ display: 'flex', gap: 6, flex: 7, minWidth: 274 }}>
+            {['z','x','c','v','b','n','m'].map(l => key(l))}
+          </div>
+          {key('', { bg: MD_C.surfaceVariant })}
+        </div>
+        <div style={{ display: 'flex', gap: 6 }}>
+          {key('?123', { bg: MD_C.secondaryContainer, r: 100, minW: 58, fs: 14 })}
+          {key(',', { bg: MD_C.surfaceVariant })}
+          {key('', { flex: 3, minW: 154 })}
+          {key('.', { bg: MD_C.surfaceVariant })}
+          {key('', { bg: MD_C.primaryFixedDim, r: 100, minW: 58 })}
+        </div>
+      </div>
+    </div>
+  );
+}
+
+Object.assign(window, {
+  AndroidDevice, AndroidStatusBar, AndroidAppBar, AndroidListItem, AndroidNavBar, AndroidKeyboard,
+});
diff --git a/claude-design/design_handoff_sethmux_toolbar/browser-window.jsx b/claude-design/design_handoff_sethmux_toolbar/browser-window.jsx
new file mode 100644
index 0000000..b90e273
--- /dev/null
+++ b/claude-design/design_handoff_sethmux_toolbar/browser-window.jsx
@@ -0,0 +1,114 @@
+
+// Chrome.jsx — Simplified Chrome browser window (dark theme, macOS)
+// No dependencies, no image assets. All inline styles + inline SVG.
+
+const CHROME_C = {
+  barBg: '#202124',
+  tabBg: '#35363a',
+  text: '#e8eaed',
+  dim: '#9aa0a6',
+  urlBg: '#282a2d',
+};
+
+function ChromeTrafficLights() {
+  return (
+    <div style={{ display: 'flex', gap: 8, padding: '0 14px' }}>
+      <div style={{ width: 12, height: 12, borderRadius: '50%', background: '#ff5f57' }} />
+      <div style={{ width: 12, height: 12, borderRadius: '50%', background: '#febc2e' }} />
+      <div style={{ width: 12, height: 12, borderRadius: '50%', background: '#28c840' }} />
+    </div>
+  );
+}
+
+// Single tab (active has curved scoops)
+function ChromeTab({ title = 'New Tab', active = false }) {
+  const curve = (flip) => (
+    <svg width="8" height="10" viewBox="0 0 8 10"
+      style={{ position: 'absolute', bottom: 0, [flip ? 'right' : 'left']: -8, transform: flip ? 'scaleX(-1)' : 'none' }}>
+      <path d="M0 10C2 9 6 8 8 0V10H0Z" fill={CHROME_C.tabBg}/>
+    </svg>
+  );
+  return (
+    <div style={{
+      position: 'relative', height: 34, alignSelf: 'flex-end',
+      padding: '0 12px', display: 'flex', alignItems: 'center', gap: 8,
+      background: active ? CHROME_C.tabBg : 'transparent',
+      borderRadius: '8px 8px 0 0', minWidth: 120, maxWidth: 220,
+      fontFamily: 'system-ui, sans-serif', fontSize: 12,
+      color: active ? CHROME_C.text : CHROME_C.dim,
+    }}>
+      {active && curve(false)}
+      {active && curve(true)}
+      <div style={{ width: 14, height: 14, borderRadius: '50%', background: '#5f6368', flexShrink: 0 }} />
+      <span style={{ flex: 1, whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' }}>{title}</span>
+    </div>
+  );
+}
+
+function ChromeTabBar({ tabs = [{ title: 'New Tab' }], activeIndex = 0 }) {
+  return (
+    <div style={{
+      display: 'flex', alignItems: 'center', height: 44,
+      background: CHROME_C.barBg, paddingRight: 8,
+    }}>
+      <ChromeTrafficLights />
+      <div style={{ display: 'flex', alignItems: 'flex-end', height: '100%', paddingLeft: 4, flex: 1 }}>
+        {tabs.map((t, i) => <ChromeTab key={i} title={t.title} active={i === activeIndex} />)}
+      </div>
+    </div>
+  );
+}
+
+function ChromeToolbar({ url = 'example.com' }) {
+  const iconDot = (
+    <div style={{
+      width: 28, height: 28, display: 'flex', alignItems: 'center', justifyContent: 'center',
+    }}>
+      <div style={{ width: 16, height: 16, borderRadius: '50%', background: CHROME_C.dim, opacity: 0.4 }} />
+    </div>
+  );
+  return (
+    <div style={{
+      height: 40, background: CHROME_C.tabBg,
+      display: 'flex', alignItems: 'center', gap: 4, padding: '0 8px',
+    }}>
+      {iconDot}
+      {/* url bar */}
+      <div style={{
+        flex: 1, height: 30, borderRadius: 15, background: CHROME_C.urlBg,
+        display: 'flex', alignItems: 'center', gap: 8, padding: '0 14px',
+        margin: '0 6px',
+      }}>
+        <div style={{ width: 12, height: 12, borderRadius: '50%', background: CHROME_C.dim, opacity: 0.4 }} />
+        <span style={{
+          flex: 1, color: CHROME_C.text, fontSize: 13,
+          fontFamily: 'system-ui, sans-serif',
+        }}>{url}</span>
+      </div>
+      {iconDot}
+    </div>
+  );
+}
+
+function ChromeWindow({
+  tabs = [{ title: 'New Tab' }], activeIndex = 0, url = 'example.com',
+  width = 900, height = 600, children,
+}) {
+  return (
+    <div style={{
+      width, height, borderRadius: 10, overflow: 'hidden',
+      boxShadow: '0 24px 80px rgba(0,0,0,0.35), 0 0 0 1px rgba(0,0,0,0.1)',
+      display: 'flex', flexDirection: 'column', background: CHROME_C.tabBg,
+    }}>
+      <ChromeTabBar tabs={tabs} activeIndex={activeIndex} />
+      <ChromeToolbar url={url} />
+      <div style={{ flex: 1, background: '#fff', overflow: 'auto' }}>
+        {children}
+      </div>
+    </div>
+  );
+}
+
+Object.assign(window, {
+  ChromeWindow, ChromeTabBar, ChromeToolbar, ChromeTab, ChromeTrafficLights,
+});
diff --git a/claude-design/design_handoff_sethmux_toolbar/preview-desktop.html b/claude-design/design_handoff_sethmux_toolbar/preview-desktop.html
new file mode 100644
index 0000000..16f70ae
--- /dev/null
+++ b/claude-design/design_handoff_sethmux_toolbar/preview-desktop.html
@@ -0,0 +1,197 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8" />
+<title>sethmux — desktop with tabs</title>
+<meta name="viewport" content="width=device-width,initial-scale=1" />
+<link rel="preconnect" href="https://fonts.googleapis.com">
+<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+<link href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;500&family=Roboto+Mono:wght@400&display=swap" rel="stylesheet">
+<style>
+  *{box-sizing:border-box;margin:0;padding:0}
+  html,body{height:100%}
+  body{
+    background:#0d0d10;
+    display:flex;align-items:center;justify-content:center;
+    font:12px/1.4 'Roboto','Helvetica Neue',Arial,sans-serif;
+    -webkit-font-smoothing:antialiased;
+    padding:24px;
+    overflow:auto;
+  }
+
+  /* ── App inside the browser ───────────────────────── */
+  .app{
+    background:#1a1a1d;
+    color:#e8eaed;
+    height:100%;
+    display:flex;flex-direction:column;
+    font:12px/1.4 'Roboto','Helvetica Neue',Arial,sans-serif;
+  }
+
+  /* sethmux own top chrome (matches Google-workspace dark) */
+  .top{
+    height:48px;flex-shrink:0;
+    background:#202124;border-bottom:1px solid #3c4043;
+    display:flex;align-items:center;padding:0 14px;gap:14px;
+  }
+  .brand{
+    color:#D35400;font-weight:500;font-size:14px;letter-spacing:.2px;
+    font-family:'Roboto',sans-serif;
+  }
+  .tabs{display:flex;gap:0;height:100%;align-items:stretch}
+  .tab{
+    display:flex;align-items:center;gap:8px;
+    padding:0 14px;height:100%;
+    color:#9aa0a6;font-size:12px;font-weight:500;
+    border-bottom:2px solid transparent;cursor:default;
+  }
+  .tab.active{color:#D35400;border-bottom-color:#D35400}
+  .tab .num{
+    font-family:'Roboto Mono',ui-monospace,monospace;font-size:10px;
+    color:#5f6368;
+  }
+  .tab.active .num{color:#D35400;opacity:.8}
+  .tab .dot{
+    width:6px;height:6px;border-radius:50%;background:#3c4043;
+  }
+  .tab.active .dot{background:#D35400}
+  .tab.alert .dot{background:#fdd663}
+  .spacer{flex:1}
+  .meta{
+    color:#9aa0a6;font-family:'Roboto Mono',ui-monospace,monospace;font-size:11px;
+  }
+  .meta b{color:#e8eaed;font-weight:400}
+
+  /* terminal */
+  .xterm{
+    flex:1;
+    padding:12px 14px;
+    overflow:hidden;
+    font-family:'Roboto Mono',ui-monospace,Menlo,Consolas,monospace;
+    font-size:13px;line-height:1.5;
+    color:#cfd2d6;background:#1a1a1d;
+  }
+  .ps1{color:#81c995}
+  .path{color:#8ab4f8}
+  .git{color:#fdd663}
+  .cmd{color:#e8eaed}
+  .dim{color:#5f6368}
+  .err{color:#f28b82}
+  .ok{color:#81c995}
+  .cursor{
+    display:inline-block;width:8px;height:15px;background:#e8eaed;
+    vertical-align:-2px;margin-left:1px;animation:blink 1.1s steps(1) infinite;
+  }
+  @keyframes blink{50%{opacity:0}}
+
+  /* status bar (above toolbar on desktop) */
+  .status{
+    height:24px;flex-shrink:0;
+    background:#202124;border-top:1px solid #3c4043;
+    display:flex;align-items:center;justify-content:space-between;
+    padding:0 14px;color:#9aa0a6;
+    font-family:'Roboto Mono',ui-monospace,monospace;font-size:11px;
+  }
+  .status .left,.status .right{display:flex;gap:14px;align-items:center}
+  .status b{color:#e8eaed;font-weight:400}
+  .status .ok{color:#81c995}
+
+  /* desktop hides the mobile toolbar — show it anyway in this preview
+     so reviewers can see what mobile users get */
+  #mb{display:flex !important;position:relative !important;
+      box-shadow:0 -1px 0 #3c4043 !important;flex-shrink:0;}
+  /* Chrome wrapper sets its own background */
+</style>
+</head>
+<body>
+
+<div id="root"></div>
+
+<script src="https://unpkg.com/react@18.3.1/umd/react.development.js" integrity="sha384-hD6/rw4ppMLGNu3tX5cjIb+uRZ7UkRJ6BPkLpg4hAu/6onKUg4lLsHAs9EBPT82L" crossorigin="anonymous"></script>
+<script src="https://unpkg.com/react-dom@18.3.1/umd/react-dom.development.js" integrity="sha384-u6aeetuaXnQ38mYT8rp6sbXaQe3NL9t+IBXmnYxwkUI2Hw4bsp2Wvmx4yRQF1uAm" crossorigin="anonymous"></script>
+<script src="https://unpkg.com/@babel/standalone@7.29.0/babel.min.js" integrity="sha384-m08KidiNqLdpJqLq95G/LEi8Qvjl/xUYll3QILypMoQ65QorJ9Lvtp2RXYGBFj1y" crossorigin="anonymous"></script>
+<script type="text/babel" src="browser-window.jsx"></script>
+
+<script type="text/babel">
+const { useEffect } = React;
+
+function SethmuxApp() {
+  return (
+    <div className="app">
+      <div className="top">
+        <div className="brand">sethmux</div>
+        <div className="tabs">
+          <div className="tab"><span className="num">1</span><span className="dot"/>code</div>
+          <div className="tab active"><span className="num">2</span><span className="dot"/>git</div>
+          <div className="tab alert"><span className="num">3</span><span className="dot"/>run</div>
+          <div className="tab"><span className="num">4</span><span className="dot"/>logs</div>
+          <div className="tab"><span className="num">5</span><span className="dot"/>notes</div>
+        </div>
+        <div className="spacer"/>
+        <div className="meta">tmux <b>sethmux</b> · 1 client · 168×42</div>
+      </div>
+
+      <div className="xterm">
+        <div><span className="ps1">seth@mux</span> <span className="path">~/sethmux</span> <span className="git">(main)</span> <span className="dim">$</span> <span className="cmd">git status</span></div>
+        <div>On branch <span className="ok">main</span></div>
+        <div>Your branch is up to date with <span className="path">'origin/main'</span>.</div>
+        <div>&nbsp;</div>
+        <div>Changes not staged for commit:</div>
+        <div className="dim">  (use "git add &lt;file&gt;..." to update what will be committed)</div>
+        <div>&nbsp;</div>
+        <div>	<span className="err">modified:</span>   static/toolbar.js</div>
+        <div>	<span className="err">modified:</span>   README.md</div>
+        <div>&nbsp;</div>
+        <div>Untracked files:</div>
+        <div>	<span className="err">static/compose-bar.js</span></div>
+        <div>&nbsp;</div>
+        <div><span className="ps1">seth@mux</span> <span className="path">~/sethmux</span> <span className="git">(main)</span> <span className="dim">$</span> <span className="cmd">git diff --stat static/toolbar.js</span></div>
+        <div> static/toolbar.js | <span className="ok">+138</span> <span className="err">-21</span></div>
+        <div>&nbsp;</div>
+        <div><span className="ps1">seth@mux</span> <span className="path">~/sethmux</span> <span className="git">(main)</span> <span className="dim">$</span> <span className="cursor"/></div>
+      </div>
+
+      <div className="status">
+        <div className="left">
+          <span><b>code</b> · <b>git</b> · run · logs · notes</span>
+          <span>pane <b>0</b>/1</span>
+        </div>
+        <div className="right">
+          <span className="ok">● connected</span>
+          <span><b>14:02</b></span>
+        </div>
+      </div>
+
+      {/* mobile toolbar mounts at body level via toolbar.js */}
+    </div>
+  );
+}
+
+function App() {
+  useEffect(() => {
+    // Load the real toolbar after render so it can find a place to mount.
+    if (window._toolbar) return;
+    const s = document.createElement('script');
+    s.src = 'toolbar.js';
+    document.body.appendChild(s);
+  }, []);
+
+  const tabs = [
+    { title: 'sethmux — git' },
+    { title: 'GitHub · sethmux' },
+    { title: 'PR #42 · review' },
+  ];
+
+  return (
+    <div style={{display:'flex',alignItems:'center',justifyContent:'center'}}>
+      <ChromeWindow tabs={tabs} activeIndex={0} url="mux.seth.dev" width={1180} height={760}>
+        <SethmuxApp/>
+      </ChromeWindow>
+    </div>
+  );
+}
+
+ReactDOM.createRoot(document.getElementById('root')).render(<App/>);
+</script>
+</body>
+</html>
diff --git a/claude-design/design_handoff_sethmux_toolbar/preview-mobile.html b/claude-design/design_handoff_sethmux_toolbar/preview-mobile.html
new file mode 100644
index 0000000..1dcafd5
--- /dev/null
+++ b/claude-design/design_handoff_sethmux_toolbar/preview-mobile.html
@@ -0,0 +1,269 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8" />
+<title>sethmux — mobile</title>
+<meta name="viewport" content="width=device-width,initial-scale=1" />
+<link rel="preconnect" href="https://fonts.googleapis.com">
+<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+<link href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;500&family=Roboto+Mono:wght@400&display=swap" rel="stylesheet">
+<style>
+  *{box-sizing:border-box;margin:0;padding:0}
+  html,body{height:100%}
+  body{
+    background:#0d0d10;
+    display:flex;align-items:center;justify-content:center;
+    font-family:'Roboto',sans-serif;
+    padding:24px;
+    overflow:auto;
+  }
+
+  /* The phone holds the sethmux app inline (not the floating toolbar).
+     We render a self-contained mobile UI here that mirrors the toolbar
+     visuals exactly, plus the compose row open and Gboard below. */
+  .phone-app{
+    display:flex;flex-direction:column;height:100%;
+    background:#1a1a1d;color:#e8eaed;
+    font-family:'Roboto',sans-serif;
+  }
+  .phone-top{
+    height:44px;flex-shrink:0;
+    background:#202124;border-bottom:1px solid #3c4043;
+    display:flex;align-items:center;justify-content:space-between;
+    padding:0 14px;
+  }
+  .phone-top .brand{color:#D35400;font-weight:500;font-size:13px}
+  .phone-top .tabs{display:flex;gap:10px;color:#9aa0a6;
+    font-family:'Roboto Mono',ui-monospace,monospace;font-size:11px}
+  .phone-top .tabs b{color:#D35400;font-weight:500}
+
+  .phone-xterm{
+    flex:1;padding:8px 10px;overflow:hidden;background:#1a1a1d;
+    font-family:'Roboto Mono',ui-monospace,Menlo,Consolas,monospace;
+    font-size:12px;line-height:1.5;color:#cfd2d6;
+  }
+  .phone-xterm .ps1{color:#81c995}
+  .phone-xterm .path{color:#8ab4f8}
+  .phone-xterm .git{color:#fdd663}
+  .phone-xterm .cmd{color:#e8eaed}
+  .phone-xterm .dim{color:#5f6368}
+  .phone-xterm .ok{color:#81c995}
+  .phone-xterm .err{color:#f28b82}
+  .phone-xterm .cursor{
+    display:inline-block;width:7px;height:13px;background:#e8eaed;
+    vertical-align:-2px;margin-left:1px;animation:blink 1.1s steps(1) infinite;
+  }
+  @keyframes blink{50%{opacity:0}}
+
+  /* ── inline toolbar (same visuals as toolbar.js, but mounted in-tree) ── */
+  .tb{
+    flex-shrink:0;
+    background:#202124;border-top:1px solid #3c4043;
+    padding:6px 8px 7px;
+    box-shadow:0 -1px 0 rgba(0,0,0,.4),0 -8px 24px rgba(0,0,0,.35);
+    display:flex;flex-direction:column;
+    font-family:'Roboto',sans-serif;
+  }
+  .tb .row{display:flex;gap:4px;justify-content:center;align-items:center;width:100%}
+  .tb .row + .row{margin-top:4px}
+  .tb button{
+    background:#303134;color:#e8eaed;border:1px solid #3c4043;
+    border-radius:4px;padding:0 8px;height:32px;min-width:38px;
+    font:500 12px/1 'Roboto',sans-serif;letter-spacing:.1px;
+    display:inline-flex;align-items:center;justify-content:center;
+  }
+  .tb .mono{
+    font-family:'Roboto Mono',ui-monospace,Menlo,Consolas,monospace;
+    font-weight:400;color:#9aa0a6;
+  }
+  .tb .hi{color:#f0a36b;border-color:#5a3a22;background:#2a1f15}
+  .tb .on{background:#D35400;border-color:#D35400;color:#0a0a0a}
+  .tb .grn{color:#81c995}
+  .tb .sep{width:1px;height:20px;background:#3c4043;margin:0 3px;flex-shrink:0}
+
+  .tb .compose{display:flex;width:100%;gap:4px;align-items:center;margin-top:4px}
+  .tb input{
+    flex:1;min-width:0;height:36px;padding:0 10px;
+    background:#303134;color:#e8eaed;
+    border:1px solid #D35400;border-radius:4px;
+    font:400 14px/1 'Roboto Mono',ui-monospace,Menlo,Consolas,monospace;
+    outline:none;-webkit-appearance:none;appearance:none;
+    caret-color:#D35400;
+  }
+  .tb .send{
+    height:36px;min-width:54px;padding:0 12px;
+    background:#D35400;border:1px solid #D35400;color:#0a0a0a;
+    border-radius:4px;font:500 12px/1 'Roboto',sans-serif;
+  }
+  .tb .send.nl{
+    background:#303134;border-color:#3c4043;color:#9aa0a6;
+    min-width:38px;padding:0 8px;
+  }
+
+  /* annotation captions next to each phone */
+  .stack{display:flex;gap:32px;align-items:flex-start}
+  .col{display:flex;flex-direction:column;align-items:center;gap:14px}
+  .cap{
+    color:#9aa0a6;font-size:12px;text-align:center;max-width:340px;
+    font-family:'Roboto',sans-serif;
+  }
+  .cap b{color:#e8eaed;font-weight:500;display:block;margin-bottom:4px;font-size:13px}
+</style>
+</head>
+<body>
+
+<div id="root"></div>
+
+<script src="https://unpkg.com/react@18.3.1/umd/react.development.js" integrity="sha384-hD6/rw4ppMLGNu3tX5cjIb+uRZ7UkRJ6BPkLpg4hAu/6onKUg4lLsHAs9EBPT82L" crossorigin="anonymous"></script>
+<script src="https://unpkg.com/react-dom@18.3.1/umd/react-dom.development.js" integrity="sha384-u6aeetuaXnQ38mYT8rp6sbXaQe3NL9t+IBXmnYxwkUI2Hw4bsp2Wvmx4yRQF1uAm" crossorigin="anonymous"></script>
+<script src="https://unpkg.com/@babel/standalone@7.29.0/babel.min.js" integrity="sha384-m08KidiNqLdpJqLq95G/LEi8Qvjl/xUYll3QILypMoQ65QorJ9Lvtp2RXYGBFj1y" crossorigin="anonymous"></script>
+<script type="text/babel" src="android-frame.jsx"></script>
+
+<script type="text/babel">
+
+function PhoneTop({tab='code', n=1, total=4}) {
+  return (
+    <div className="phone-top">
+      <div className="brand">sethmux</div>
+      <div className="tabs"><b>{tab}</b> · {n}/{total}</div>
+    </div>
+  );
+}
+
+function PhoneXterm({collapsed}) {
+  return (
+    <div className="phone-xterm">
+      <div><span className="ps1">seth@mux</span> <span className="path">~</span> <span className="dim">$</span> <span className="cmd">tmux ls</span></div>
+      <div>sethmux: 4 windows</div>
+      <div className="dim">  code git run logs</div>
+      <div>&nbsp;</div>
+      <div><span className="ps1">seth@mux</span> <span className="path">~</span> <span className="dim">$</span> <span className="cmd">make build</span></div>
+      <div className="ok">→ ok in 2.31s</div>
+      {!collapsed && <>
+        <div>&nbsp;</div>
+        <div><span className="ps1">seth@mux</span> <span className="path">~</span> <span className="dim">$</span> <span className="cmd">tail -f logs/run.log</span></div>
+        <div className="dim">[14:02:11] http 200 /api/notify 4ms</div>
+        <div className="dim">[14:02:14] http 200 /api/notify 3ms</div>
+      </>}
+      <div>&nbsp;</div>
+      <div><span className="ps1">seth@mux</span> <span className="path">~</span> <span className="dim">$</span> <span className="cursor"/></div>
+    </div>
+  );
+}
+
+function ToolbarCollapsed() {
+  return (
+    <div className="tb">
+      <div className="row">
+        <button className="hi">+ Tab</button>
+        <button>Next</button>
+        <button>Prev</button>
+        <div className="sep"/>
+        <button className="mono">^C</button>
+        <button className="mono">^D</button>
+        <button>Clr</button>
+        <div className="sep"/>
+        <button className="mono">Esc</button>
+        <button className="mono">Tab</button>
+        <button className="mono">▲</button>
+        <button className="mono">▼</button>
+      </div>
+      <div className="row">
+        <button className="hi">Sel</button>
+        <button className="hi">Paste</button>
+        <button>Zoom</button>
+        <button className="grn">Save</button>
+        <div className="sep"/>
+        <button>V.Spl</button>
+        <button>H.Spl</button>
+        <button>Pane</button>
+        <button>Kill</button>
+        <div className="sep"/>
+        <button className="hi">Type</button>
+      </div>
+    </div>
+  );
+}
+
+function ToolbarComposing() {
+  return (
+    <div className="tb">
+      <div className="row">
+        <button className="hi">+ Tab</button>
+        <button>Next</button>
+        <button>Prev</button>
+        <div className="sep"/>
+        <button className="mono">^C</button>
+        <button className="mono">^D</button>
+        <button>Clr</button>
+        <div className="sep"/>
+        <button className="mono">Esc</button>
+        <button className="mono">Tab</button>
+        <button className="mono">▲</button>
+        <button className="mono">▼</button>
+      </div>
+      <div className="row">
+        <button className="hi">Sel</button>
+        <button className="hi">Paste</button>
+        <button>Zoom</button>
+        <button className="grn">Save</button>
+        <div className="sep"/>
+        <button>V.Spl</button>
+        <button>H.Spl</button>
+        <button>Pane</button>
+        <button>Kill</button>
+        <div className="sep"/>
+        <button className="on">Type</button>
+      </div>
+      <div className="compose">
+        <input defaultValue="git commit -m &quot;wire up compose bar&quot;" />
+        <button className="send nl">↵</button>
+        <button className="send">Send</button>
+      </div>
+    </div>
+  );
+}
+
+function PhoneCollapsed() {
+  return (
+    <AndroidDevice width={360} height={720} dark>
+      <div className="phone-app">
+        <PhoneTop tab="code" n={1} total={4}/>
+        <PhoneXterm/>
+        <ToolbarCollapsed/>
+      </div>
+    </AndroidDevice>
+  );
+}
+
+function PhoneComposing() {
+  return (
+    <AndroidDevice width={360} height={720} dark>
+      <div className="phone-app">
+        <PhoneTop tab="git" n={2} total={4}/>
+        <PhoneXterm collapsed/>
+        <ToolbarComposing/>
+      </div>
+    </AndroidDevice>
+  );
+}
+
+function App() {
+  return (
+    <div className="stack">
+      <div className="col">
+        <PhoneCollapsed/>
+        <div className="cap"><b>Default — 2 rows</b>All chord keys, tabs, splits, and Save in reach. Tap <span style={{color:'#f0a36b'}}>Type</span> to open compose.</div>
+      </div>
+      <div className="col">
+        <PhoneComposing/>
+        <div className="cap"><b>Compose open — 3 rows</b>Real input field with Gboard autocorrect / swipe / predictions. ↵ or Send flushes to stdin + a newline. Other keys still work mid-typing.</div>
+      </div>
+    </div>
+  );
+}
+
+ReactDOM.createRoot(document.getElementById('root')).render(<App/>);
+</script>
+</body>
+</html>
diff --git a/claude-design/design_handoff_sethmux_toolbar/preview.html b/claude-design/design_handoff_sethmux_toolbar/preview.html
new file mode 100644
index 0000000..f5196b2
--- /dev/null
+++ b/claude-design/design_handoff_sethmux_toolbar/preview.html
@@ -0,0 +1,96 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8" />
+<title>sethmux — toolbar preview</title>
+<meta name="viewport" content="width=device-width,initial-scale=1" />
+<link rel="preconnect" href="https://fonts.googleapis.com">
+<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+<link href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;500&family=Roboto+Mono:wght@400&display=swap" rel="stylesheet">
+<style>
+  :root{
+    --bg:#1a1a1d;
+    --bg-toolbar:#202124;
+    --border:#3c4043;
+    --text:#e8eaed;
+    --text-2:#9aa0a6;
+    --accent:#D35400;
+  }
+  *{box-sizing:border-box;margin:0;padding:0}
+  html,body{height:100%}
+  body{
+    background:var(--bg);
+    color:var(--text);
+    font:12px/1.4 'Roboto','Helvetica Neue',Arial,sans-serif;
+    -webkit-font-smoothing:antialiased;
+    overflow:hidden;
+  }
+
+  /* Mock chrome strip so the preview reads like a phone-shell view */
+  .chrome{
+    height:44px;
+    background:var(--bg-toolbar);
+    border-bottom:1px solid var(--border);
+    display:flex;align-items:center;justify-content:space-between;
+    padding:0 14px;
+    color:var(--text-2);
+  }
+  .chrome .brand{
+    color:var(--accent);
+    font-weight:500;letter-spacing:.2px;font-size:13px;
+  }
+  .chrome .meta{
+    font-family:'Roboto Mono',ui-monospace,monospace;
+    font-size:11px;color:var(--text-2);
+  }
+  .chrome .meta b{color:var(--text);font-weight:400}
+
+  /* Mock xterm pane */
+  .xterm{
+    height:calc(100vh - 44px - 92px);
+    transition:height .15s ease;
+    padding:10px 12px;
+    overflow:hidden;
+    font-family:'Roboto Mono',ui-monospace,Menlo,Consolas,monospace;
+    font-size:13px;line-height:1.45;
+    color:#cfd2d6;
+  }
+  .xterm .ps1{color:#81c995}
+  .xterm .path{color:#8ab4f8}
+  .xterm .git{color:#fdd663}
+  .xterm .cmd{color:#e8eaed}
+  .xterm .dim{color:#5f6368}
+  .xterm .cursor{
+    display:inline-block;width:8px;height:15px;
+    background:#e8eaed;vertical-align:-2px;margin-left:1px;
+    animation:blink 1.1s steps(1) infinite;
+  }
+  @keyframes blink{50%{opacity:0}}
+  .xterm-screen{height:100%}
+</style>
+</head>
+<body>
+
+<div class="chrome">
+  <div class="brand">sethmux</div>
+  <div class="meta"><b>code</b> · <b>1</b>/4 · 80×24</div>
+</div>
+
+<div class="xterm">
+  <div class="xterm-screen">
+    <div><span class="ps1">seth@mux</span> <span class="path">~/sethmux</span> <span class="git">(main)</span> <span class="dim">$</span> <span class="cmd">tmux ls</span></div>
+    <div>sethmux: 4 windows (created Thu Apr 24 09:12:03 2026) (attached)</div>
+    <div class="dim">  code  git  run  logs</div>
+    <div>&nbsp;</div>
+    <div><span class="ps1">seth@mux</span> <span class="path">~/sethmux</span> <span class="git">(main)</span> <span class="dim">$</span> <span class="cmd">make build &amp;&amp; sethmux-notify "OK"</span></div>
+    <div class="dim">→ built in 2.31s</div>
+    <div>&nbsp;</div>
+    <div><span class="ps1">seth@mux</span> <span class="path">~/sethmux</span> <span class="git">(main)</span> <span class="dim">$</span> <span class="cursor"></span></div>
+  </div>
+</div>
+
+<!-- Force the toolbar visible in preview at any width -->
+<style>#mb{display:flex !important}</style>
+<script src="toolbar.js"></script>
+</body>
+</html>
diff --git a/claude-design/design_handoff_sethmux_toolbar/toolbar.js b/claude-design/design_handoff_sethmux_toolbar/toolbar.js
new file mode 100644
index 0000000..b201279
--- /dev/null
+++ b/claude-design/design_handoff_sethmux_toolbar/toolbar.js
@@ -0,0 +1,305 @@
+(function(){
+  if(window._toolbar) return;
+  window._toolbar=true;
+
+  // ── Sethmux toolbar — Google Workspace dark vibe, sethmux orange accent ──
+  // Tokens (kept local, not :root, so we don't pollute the host page)
+  //   bg            #202124   toolbar surface
+  //   surface       #303134   button face
+  //   border        #3c4043   hairlines
+  //   text          #e8eaed   primary
+  //   text-2        #9aa0a6   secondary / icons at rest
+  //   accent        #D35400   sethmux orange (replaces Google blue)
+  //   accent-bg     #3a2a1a   tinted hover/selected wash
+  //   ok            #81c995   save success
+
+  var css=document.createElement('style');
+  css.textContent = [
+    "#mb{",
+      "display:none;position:fixed;bottom:0;left:0;right:0;",
+      "background:#202124;",
+      "border-top:1px solid #3c4043;",
+      "padding:6px 8px 7px;",
+      "gap:0;flex-direction:column;align-items:stretch;",
+      "z-index:99999;",
+      "font-family:'Roboto','Helvetica Neue',Arial,sans-serif;",
+      "-webkit-font-smoothing:antialiased;",
+      "box-shadow:0 -1px 0 rgba(0,0,0,.4),0 -8px 24px rgba(0,0,0,.35);",
+    "}",
+
+    "#mb .row{",
+      "display:flex;gap:4px;justify-content:center;align-items:center;",
+      "width:100%;",
+    "}",
+    "#mb .row + .row{margin-top:4px}",
+
+    "#mb button{",
+      "background:#303134;",
+      "color:#e8eaed;",
+      "border:1px solid #3c4043;",
+      "border-radius:4px;",
+      "padding:0 10px;height:32px;min-width:40px;",
+      "font:500 12px/1 'Roboto','Helvetica Neue',Arial,sans-serif;",
+      "letter-spacing:.1px;",
+      "cursor:pointer;",
+      "touch-action:manipulation;",
+      "-webkit-tap-highlight-color:transparent;",
+      "user-select:none;",
+      "display:inline-flex;align-items:center;justify-content:center;",
+      "transition:background .15s ease,border-color .15s ease,color .15s ease;",
+    "}",
+    "#mb button:hover{background:#3a2a1a;border-color:#3c4043;color:#fff}",
+    "#mb button:active{background:#D35400;border-color:#D35400;color:#0a0a0a}",
+
+    // Mono labels for chord/arrow keys so they read as terminal input
+    "#mb button.mono{",
+      "font-family:'Roboto Mono','SF Mono',ui-monospace,Menlo,Consolas,monospace;",
+      "font-weight:400;color:#9aa0a6;",
+    "}",
+    "#mb button.mono:hover{color:#e8eaed}",
+
+    // Accent (orange) — used for primary/important actions at rest
+    "#mb button.hi{",
+      "color:#f0a36b;border-color:#5a3a22;background:#2a1f15;",
+    "}",
+    "#mb button.hi:hover{background:#3a2a1a;color:#ffb37a;border-color:#7a4a2a}",
+
+    // Toggled-on state (Sel active, etc.) — filled accent
+    "#mb button.on{",
+      "background:#D35400;border-color:#D35400;color:#0a0a0a;",
+    "}",
+    "#mb button.on:hover{background:#e26416;border-color:#e26416;color:#0a0a0a}",
+
+    // Success (Save) — Google green at rest, fills on confirm
+    "#mb button.grn{color:#81c995;border-color:#3c4043;background:#303134}",
+    "#mb button.grn:hover{background:#1f2a22;color:#a8e0b8;border-color:#3a5a44}",
+    "#mb button.grn.on{background:#1e8e3e;border-color:#1e8e3e;color:#0a0a0a}",
+
+    // Vertical hairline divider between groups
+    "#mb .sep{",
+      "width:1px;height:20px;background:#3c4043;margin:0 4px;flex-shrink:0;",
+    "}",
+
+    // ── Compose bar (mobile autocorrect workaround) ──
+    "#mb .compose{",
+      "display:none;width:100%;gap:4px;align-items:center;margin-top:4px;",
+    "}",
+    "#mb.composing .compose{display:flex}",
+    "#mb.composing #typebtn{",
+      "background:#D35400;border-color:#D35400;color:#0a0a0a;",
+    "}",
+    "#mb-compose{",
+      "flex:1;min-width:0;height:36px;",
+      "padding:0 10px;",
+      "background:#303134;color:#e8eaed;",
+      "border:1px solid #3c4043;border-radius:4px;",
+      "font:400 14px/1 'Roboto Mono','SF Mono',ui-monospace,Menlo,Consolas,monospace;",
+      "outline:none;",
+      "-webkit-appearance:none;appearance:none;",
+      "caret-color:#D35400;",
+    "}",
+    "#mb-compose:focus{border-color:#D35400}",
+    "#mb-compose::placeholder{color:#5f6368}",
+    "#mb .send{",
+      "height:36px;min-width:54px;padding:0 12px;",
+      "background:#D35400;border:1px solid #D35400;color:#0a0a0a;",
+      "border-radius:4px;font:500 12px/1 'Roboto',sans-serif;cursor:pointer;",
+    "}",
+    "#mb .send:disabled{background:#303134;border-color:#3c4043;color:#5f6368;cursor:default}",
+    "#mb .send.nl{background:#303134;border-color:#3c4043;color:#9aa0a6;min-width:38px;padding:0 8px}",
+    "#mb .send.nl:hover{color:#e8eaed;background:#3a2a1a}",
+
+    // Selection mode visual — dim the terminal slightly so the text-select layer reads
+    "body.selmode .xterm-screen{",
+      "pointer-events:none!important;",
+      "user-select:text!important;-webkit-user-select:text!important;",
+    "}",
+    "body.selmode .xterm{filter:brightness(.92)}",
+
+    "@media(max-width:900px){#mb{display:flex}}",
+    // Tighter on very narrow phones
+    "@media(max-width:380px){",
+      "#mb button{padding:0 7px;min-width:34px;height:30px;font-size:11.5px}",
+      "#mb .sep{margin:0 2px}",
+    "}",
+  ].join("");
+  document.head.appendChild(css);
+
+  var bar=document.createElement('div');
+  bar.id='mb';
+  bar.innerHTML =
+    '<div class="row">' +
+      '<button class="hi" data-k="\x01c">+ Tab</button>' +
+      '<button data-k="\x01n">Next</button>' +
+      '<button data-k="\x01p">Prev</button>' +
+      '<div class="sep"></div>' +
+      '<button class="mono" data-k="\x03">^C</button>' +
+      '<button class="mono" data-k="\x04">^D</button>' +
+      '<button data-k="\x0c">Clr</button>' +
+      '<div class="sep"></div>' +
+      '<button class="mono" data-k="\x1b">Esc</button>' +
+      '<button class="mono" data-k="\t">Tab</button>' +
+      '<button class="mono" data-k="\x1bOA">\u25B2</button>' +
+      '<button class="mono" data-k="\x1bOB">\u25BC</button>' +
+    '</div>' +
+    '<div class="row">' +
+      '<button class="hi" id="selbtn" data-sel="1">Sel</button>' +
+      '<button class="hi" id="pastebtn" data-paste="1">Paste</button>' +
+      '<button data-k="\x01z">Zoom</button>' +
+      '<button class="grn" data-save="1">Save</button>' +
+      '<div class="sep"></div>' +
+      '<button data-k="\x01v">V.Spl</button>' +
+      '<button data-k="\x01s">H.Spl</button>' +
+      '<button data-k="\x01o">Pane</button>' +
+      '<button data-k="\x01x">Kill</button>' +
+      '<div class="sep"></div>' +
+      '<button class="hi" id="typebtn" data-type="1">Type</button>' +
+    '</div>' +
+    '<div class="compose row">' +
+      '<input id="mb-compose" type="text" ' +
+        'placeholder="type here \u2014 autocorrect on, \u21B5 sends" ' +
+        'autocomplete="on" autocorrect="on" autocapitalize="sentences" ' +
+        'spellcheck="true" enterkeyhint="send" inputmode="text" />' +
+      '<button class="send nl" data-nl="1" title="Send newline">\u21B5</button>' +
+      '<button class="send" data-send="1">Send</button>' +
+    '</div>';
+  document.body.appendChild(bar);
+
+  // ── terminal I/O ─────────────────────────────────────────
+  function send(k){
+    if(document.body.classList.contains('selmode')) toggleSel();
+    var t=window.term;
+    if(!t) return;
+    if(t._core && t._core.coreService && t._core.coreService.triggerDataEvent){
+      t._core.coreService.triggerDataEvent(k);
+    } else if(t._core && t._core._onData){
+      t._core._onData.fire(k);
+    } else if(t.input){
+      t.input(k);
+    }
+    t.focus();
+  }
+
+  function toggleSel(){
+    var b=document.getElementById('selbtn');
+    document.body.classList.toggle('selmode');
+    if(document.body.classList.contains('selmode')){
+      b.classList.add('on');b.textContent='Done';
+    } else {
+      b.classList.remove('on');b.textContent='Sel';
+      window.getSelection().removeAllRanges();
+      if(window.term) window.term.focus();
+    }
+  }
+
+  function doPaste(){
+    if(!navigator.clipboard||!navigator.clipboard.readText){
+      alert('Clipboard access not available (needs HTTPS)');
+      return;
+    }
+    navigator.clipboard.readText().then(function(text){
+      if(text) send(text);
+    }).catch(function(e){
+      alert('Clipboard read failed: '+e.message);
+    });
+  }
+
+  function doSave(){
+    send('\x01S');
+    var btn=document.querySelector('[data-save]');
+    btn.classList.add('on');
+    btn.textContent='\u2713 Saved';
+    setTimeout(function(){btn.classList.remove('on');btn.textContent='Save';},1500);
+  }
+
+  // ── Compose bar (mobile autocorrect workaround) ──
+  // xterm.js reads keys from a hidden textarea via per-keystroke events;
+  // Gboard autocorrect/swipe replaces .value in bulk so those chars never
+  // reach stdin. The compose bar gives autocorrect a real <input> to chew
+  // on, then sends the assembled string to the terminal in one shot.
+  var ci=document.getElementById('mb-compose');
+
+  function toggleType(){
+    var on=bar.classList.toggle('composing');
+    if(on){
+      // Defer focus so the keyboard opens reliably on iOS/Android
+      setTimeout(function(){ ci.focus(); },0);
+      relayout();
+    } else {
+      ci.blur();
+      if(window.term) window.term.focus();
+      relayout();
+    }
+  }
+
+  function flushCompose(appendNewline){
+    var v=ci.value;
+    ci.value='';
+    if(v) send(v);
+    if(appendNewline) send('\r');
+    ci.focus();
+  }
+
+  ci.addEventListener('keydown',function(e){
+    if(e.key==='Enter'){
+      e.preventDefault();
+      flushCompose(true);
+    }
+  });
+
+  bar.addEventListener('click',function(e){
+    var btn=e.target.closest('button');
+    if(!btn) return;
+    if(btn.dataset.sel) return toggleSel();
+    if(btn.dataset.paste) return doPaste();
+    if(btn.dataset.save) return doSave();
+    if(btn.dataset.type) return toggleType();
+    if(btn.dataset.send) return flushCompose(true);
+    if(btn.dataset.nl) return flushCompose(true);  // explicit newline button
+    if(btn.dataset.k) {
+      // Key pressed while composing: flush typed text first so order is preserved,
+      // but DON'T close the compose bar — user is mid-thought.
+      if(bar.classList.contains('composing') && ci.value){
+        var v=ci.value; ci.value=''; send(v);
+      }
+      send(btn.dataset.k);
+      if(bar.classList.contains('composing')) ci.focus();
+    }
+  });
+
+  // Keep terminal focused when tapping outside the toolbar
+  document.addEventListener('click', function(e){
+    if(!e.target.closest('#mb') && window.term) window.term.focus();
+  });
+
+  // Tab key shouldn't escape into toolbar focus
+  bar.querySelectorAll('button').forEach(function(b){ b.tabIndex = -1; });
+
+  // Disable mobile autocomplete on xterm's hidden textarea
+  function disableMobileAutocomplete(){
+    var ta=document.querySelector('.xterm-helper-textarea');
+    if(!ta || ta.dataset.acOff) return;
+    ta.setAttribute('autocomplete','off');
+    ta.setAttribute('autocorrect','off');
+    ta.setAttribute('autocapitalize','off');
+    ta.setAttribute('spellcheck','false');
+    ta.dataset.acOff='1';
+  }
+
+  // Resize terminal to leave room for the toolbar on mobile.
+  // Height is dynamic: 2 rows when collapsed, 3 when compose bar is open.
+  function relayout(){
+    var el=document.querySelector('.xterm');
+    if(!el || window.innerWidth>900) return;
+    var h=bar.offsetHeight || 92;
+    el.style.height='calc(100vh - '+(h+4)+'px)';
+    if(window.term && window.term.fit) window.term.fit();
+  }
+
+  var obs=new MutationObserver(function(){
+    disableMobileAutocomplete();
+    relayout();
+  });
+  obs.observe(document.body,{childList:true,subtree:true});
+  window.addEventListener('resize',relayout);
+})();