diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index 8a98fef..7b19bf6 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -63,7 +63,7 @@ Architectural overview and technical reference for the Agent Dashboard system, c
 - [State Management](#state-management)
 - [Browser Notification System](#browser-notification-system)
 - [Update Notifier Subsystem](#update-notifier-subsystem)
-- [Tabby Companion Subsystem](#tabby-companion-subsystem)
+- [Sagi Companion Subsystem](#sagi-companion-subsystem)
 - [VS Code Extension Architecture](#vs-code-extension-architecture)
 - [Security Considerations](#security-considerations)
 - [Performance Characteristics](#performance-characteristics)
@@ -576,7 +576,7 @@ graph TD
         STC[StatCard]
         STB[StatusBadge]
         ES[EmptyState]
-        TB["Tabby/<br/>(floating cat companion)"]
+        TB["Sagi/<br/>(floating mascot companion)"]
     end
 
     D --> STC & AGC & STB
@@ -1003,13 +1003,13 @@ graph TD
     BC --> WS
     WS --> EB
     EB --> SUB1 & SUB2 & SUB3 & SUB4 & SUB5 & SUB6
-    EB --> SUB7["Tabby companion subscriber"]
+    EB --> SUB7["Sagi companion subscriber"]
 
     style BC fill:#10b981,stroke:#34d399,color:#fff
     style EB fill:#f59e0b,stroke:#fbbf24,color:#000
 ```
 
-The **Tabby companion** (see [Tabby Companion Subsystem](#tabby-companion-subsystem)) is an additional read-only `eventBus` subscriber. It consumes the existing message envelope above and introduces **no new WebSocket message types** and no protocol changes.
+The **Sagi companion** (see [Sagi Companion Subsystem](#sagi-companion-subsystem)) is an additional read-only `eventBus` subscriber. It consumes the existing message envelope above and introduces **no new WebSocket message types** and no protocol changes.
 
 ### Client Reconnection
 
@@ -1847,7 +1847,7 @@ graph TD
 
     subgraph "App-Level Hooks"
         NOTIF_H["useNotifications<br/>reads prefs, fires<br/>browser notifications"]
-        TABBY_H["useTabbyBrain<br/>derives cat mood +<br/>speech from WS stream"]
+        SAGI_H["useSagiBrain<br/>derives mascot mood +<br/>speech from WS stream"]
     end
 
     subgraph "Page State"
@@ -1865,9 +1865,9 @@ graph TD
     WSM --> EB
     EB --> US1 & US2 & US3 & US4 & US5 & US6 & US8 & US7
     EB --> NOTIF_H
-    EB --> TABBY_H
+    EB --> SAGI_H
     LS --> NOTIF_H
-    LS --> TABBY_H
+    LS --> SAGI_H
     LS --> US7
 ```
 
@@ -2135,9 +2135,9 @@ The detection layer carries all of the signal value: the dashboard tells the use
 
 ---
 
-## Tabby Companion Subsystem
+## Sagi Companion Subsystem
 
-Tabby is a **client-only** floating cat companion that reacts to live session activity. It is purely additive UI: there is **no server/backend code**, **no new API routes**, **no new WebSocket message types**, and **no database changes**. Tabby reuses the existing real-time event stream (the same `eventBus` every page already consumes) and the existing **Run** page for its "ask a real question" path. The entire subsystem lives under `client/src/components/Tabby/`.
+Sagi is a **client-only** floating mascot companion that reacts to live session activity. It is purely additive UI: there is **no server/backend code**, **no new API routes**, **no new WebSocket message types**, and **no database changes**. Sagi reuses the existing real-time event stream (the same `eventBus` every page already consumes) and the existing **Run** page for its "ask a real question" path. The entire subsystem lives under `client/src/components/Sagi/`.
 
 The design follows a strict **pure-core / hook / presentational** split: a framework-free brain (a `WSMessage` reducer plus a mood state machine with an injected clock and zero side effects) is fully unit-tested in isolation, a single React hook is the only consumer of the global `eventBus` and the only owner of timers and side effects, and the SVG/markup components are pure presentational views driven by props.
 
@@ -2146,22 +2146,22 @@ The design follows a strict **pure-core / hook / presentational** split: a frame
 ```mermaid
 graph TD
     subgraph "Pure Core (framework-free, unit-tested)"
-        BRAIN["brain.ts<br/>reduceTabby reducer +<br/>deriveMood state machine<br/>(injected clock, no side effects)"]
+        BRAIN["brain.ts<br/>reduceSagi reducer +<br/>deriveMood state machine<br/>(injected clock, no side effects)"]
         INTENTS["intents.ts<br/>local Q&A over cached status;<br/>unmatched → Run handoff"]
         QUIPS["quips.ts<br/>mood → phrase pools"]
         PREFS["prefs.ts<br/>localStorage enabled/muted<br/>(cross-tab sync)"]
     end
 
     subgraph "Hook (only eventBus consumer)"
-        HOOK["useTabbyBrain.ts<br/>wires brain to real timers<br/>(idle/sleep/stuck), speech-bubble<br/>queue, mute, clear-alerts"]
+        HOOK["useSagiBrain.ts<br/>wires brain to real timers<br/>(idle/sleep/stuck), speech-bubble<br/>queue, mute, clear-alerts"]
     end
 
     subgraph "Presentational (pure)"
-        SHELL["Tabby.tsx<br/>shell: open/closed state,<br/>⌘B / Esc, reduced-motion,<br/>navigation"]
-        AVATAR["CatAvatar.tsx<br/>SVG cat; data-mood drives CSS;<br/>cursor-tracking pupils"]
+        SHELL["Sagi.tsx<br/>shell: open/closed state,<br/>⌘B / Esc, reduced-motion,<br/>navigation"]
+        AVATAR["SagiAvatar.tsx<br/>SVG mascot; data-mood drives CSS;<br/>cursor-tracking pupils"]
         BUBBLE["SpeechBubble.tsx<br/>bubble"]
-        PANEL["TabbyPanel.tsx<br/>status + quick actions + Ask box"]
-        CSS["tabby.css<br/>keyframes + per-mood expressions"]
+        PANEL["SagiPanel.tsx<br/>status + quick actions + Ask box"]
+        CSS["sagi.css<br/>keyframes + per-mood expressions"]
     end
 
     BUS["lib/eventBus.ts<br/>(existing WS stream)"]
@@ -2186,44 +2186,44 @@ graph TD
 flowchart LR
     WSS["Server WebSocket<br/>broadcast"] --> UWS["useWebSocket"]
     UWS --> PUB["eventBus.publish"]
-    PUB --> SUB["useTabbyBrain<br/>(subscriber)"]
+    PUB --> SUB["useSagiBrain<br/>(subscriber)"]
     SUB --> DERIVED["derived state<br/>{ mood, status, bubble }"]
-    DERIVED --> AVATAR["CatAvatar"]
+    DERIVED --> AVATAR["SagiAvatar"]
     DERIVED --> BUBBLE["SpeechBubble"]
-    DERIVED --> PANEL["TabbyPanel"]
+    DERIVED --> PANEL["SagiPanel"]
     PANEL -->|"unmatched Ask"| RUN["/run?prompt=…<br/>(existing Run page)"]
 
     style PUB fill:#f59e0b,stroke:#fbbf24,color:#000
     style RUN fill:#10b981,stroke:#34d399,color:#fff
 ```
 
-The mood state machine in `deriveMood` resolves to a single expression using a fixed priority order: `disconnected > worried > stuck > happy > thinking > watching > sleeping > idle`. The resolved mood is written to a `data-mood` attribute on the SVG cat, and `tabby.css` maps each mood to its keyframe animation and expression.
+The mood state machine in `deriveMood` resolves to a single expression using a fixed priority order: `disconnected > worried > stuck > happy > thinking > watching > sleeping > idle`. The resolved mood is written to a `data-mood` attribute on the SVG mascot, and `sagi.css` maps each mood to its keyframe animation and expression.
 
 ### Component Responsibilities
 
 | Component | Responsibility |
 | --- | --- |
-| **`brain.ts`** | Pure, framework-free core. Exposes a `WSMessage` reducer (`reduceTabby`) and a mood state machine (`deriveMood`) with the priority order `disconnected > worried > stuck > happy > thinking > watching > sleeping > idle`. The clock is injected and there are zero side effects, so the brain is fully unit-tested in isolation. |
-| **`useTabbyBrain.ts`** | The **only** consumer of the global `eventBus`. Wires the pure brain to real timers (idle / sleep / stuck), the speech-bubble queue, mute, and clear-alerts. Produces the derived `{ mood, status, bubble }` the presentational components render. |
-| **`CatAvatar.tsx`** | Pure presentational SVG cat. The `data-mood` attribute drives CSS; pupils track the cursor. |
+| **`brain.ts`** | Pure, framework-free core. Exposes a `WSMessage` reducer (`reduceSagi`) and a mood state machine (`deriveMood`) with the priority order `disconnected > worried > stuck > happy > thinking > watching > sleeping > idle`. The clock is injected and there are zero side effects, so the brain is fully unit-tested in isolation. |
+| **`useSagiBrain.ts`** | The **only** consumer of the global `eventBus`. Wires the pure brain to real timers (idle / sleep / stuck), the speech-bubble queue, mute, and clear-alerts. Produces the derived `{ mood, status, bubble }` the presentational components render. |
+| **`SagiAvatar.tsx`** | Pure presentational SVG mascot. The `data-mood` attribute drives CSS; pupils track the cursor. |
 | **`SpeechBubble.tsx`** | Pure presentational speech bubble. |
-| **`TabbyPanel.tsx`** | Pure presentational panel: status readout + quick actions + the Ask box. |
-| **`Tabby.tsx`** | Shell component. Mounted once in `client/src/components/Layout.tsx` as a sibling of `UpdateNotifier`. Owns open/closed state, the `⌘B` / `Esc` shortcuts, reduced-motion detection, and navigation. |
+| **`SagiPanel.tsx`** | Pure presentational panel: status readout + quick actions + the Ask box. |
+| **`Sagi.tsx`** | Shell component. Mounted once in `client/src/components/Layout.tsx` as a sibling of `UpdateNotifier`. Owns open/closed state, the `⌘B` / `Esc` shortcuts, reduced-motion detection, and navigation. |
 | **`intents.ts`** | Pure local Q&A over the cached status snapshot. Queries that don't match a local intent become a handoff to the existing Run page via `/run?prompt=…`. |
 | **`quips.ts`** | Pure mood → phrase pools. |
 | **`prefs.ts`** | `localStorage`-backed enabled / muted preferences with cross-tab sync. |
-| **`tabby.css`** | Keyframes and per-mood expressions; selected via the `data-mood` attribute. |
+| **`sagi.css`** | Keyframes and per-mood expressions; selected via the `data-mood` attribute. |
 
 ### Touchpoints Outside the Folder
 
-Tabby's only contact with the rest of the app is four light, additive touchpoints — nothing in the server, database, or WebSocket protocol changes:
+Sagi's only contact with the rest of the app is four light, additive touchpoints — nothing in the server, database, or WebSocket protocol changes:
 
 | File | Touchpoint |
 | --- | --- |
-| `client/src/components/Layout.tsx` | Mounts `<Tabby />` once, as a sibling of `<UpdateNotifier />`. |
-| `client/src/pages/Settings.tsx` | On/off toggle wired to `tabbyPrefs` (`localStorage`). |
-| `client/src/pages/Workspace.tsx` | Reads `?prompt=` to prefill the prompt box for Tabby's Ask handoff. |
-| `client/src/i18n/locales/{en,zh,vi,ko}/settings.json` | `tabby.*` strings for the Settings toggle (en / zh / vi / ko). |
+| `client/src/components/Layout.tsx` | Mounts `<Sagi />` once, as a sibling of `<UpdateNotifier />`. |
+| `client/src/pages/Settings.tsx` | On/off toggle wired to `sagiPrefs` (`localStorage`). |
+| `client/src/pages/Workspace.tsx` | Reads `?prompt=` to prefill the prompt box for Sagi's Ask handoff. |
+| `client/src/i18n/locales/{en,vi}/settings.json` | `sagi.*` strings for the Settings toggle (zh / ko fall back to the hardcoded English defaults). |
 
 ---
 
diff --git a/client/src/components/Layout.tsx b/client/src/components/Layout.tsx
index 9b9c46e..28424db 100644
--- a/client/src/components/Layout.tsx
+++ b/client/src/components/Layout.tsx
@@ -1,7 +1,7 @@
 /**
  * @file Layout.tsx
  * @description Application shell that frames every authenticated route: persistent
- * sidebar, main content column, update notifier, and the Tabby assistant overlay.
+ * sidebar, main content column, update notifier, and the Sagi assistant overlay.
  * The layout is the single parent route in {@link App} — child pages render inside
  * React Router's `<Outlet />` so navigation never remounts chrome.
  *
@@ -38,7 +38,7 @@
  * ## Internal dependencies
  * - `./Sidebar`
  * - `./UpdateNotifier`
- * - `./Tabby/Tabby`
+ * - `./Sagi/Sagi`
  *
  * ## Public surface
  * - `Layout` — exported API; see TSDoc on the symbol for behavior.
@@ -68,7 +68,7 @@ import { Outlet } from "react-router-dom";
 import { useTranslation } from "react-i18next";
 import { Sidebar, SIDEBAR_STORAGE_KEY, loadCollapsed } from "./Sidebar";
 import { UpdateNotifier } from "./UpdateNotifier";
-import { Tabby } from "./Tabby/Tabby";
+import { Sagi } from "./Sagi/Sagi";
 
 /** Props for {@link Layout}. */
 interface LayoutProps {
@@ -100,7 +100,7 @@ export function Layout({ wsConnected }: LayoutProps) {
         {t("skipToContent")}
       </a>
       <UpdateNotifier />
-      <Tabby />
+      <Sagi />
       <Sidebar wsConnected={wsConnected} collapsed={collapsed} onToggle={toggle} />
       <main
         id="main-content"
diff --git a/client/src/components/Tabby/Tabby.tsx b/client/src/components/Sagi/Sagi.tsx
similarity index 80%
rename from client/src/components/Tabby/Tabby.tsx
rename to client/src/components/Sagi/Sagi.tsx
index 2c36fde..f446862 100644
--- a/client/src/components/Tabby/Tabby.tsx
+++ b/client/src/components/Sagi/Sagi.tsx
@@ -1,12 +1,12 @@
 /**
- * @file Tabby.tsx
- * @description Floating cat companion shell. Mounts once (next to UpdateNotifier
+ * @file Sagi.tsx
+ * @description Floating mascot companion shell. Mounts once (next to UpdateNotifier
  *   in Layout) so it persists across routes and shares the single WebSocket.
  *   Owns the open/closed panel state, the ⌘B / Esc shortcuts, reduced-motion
  *   detection, and route navigation. Reactive personality + status/Ask come
- *   from useTabbyBrain; the avatar is draggable (AssistiveTouch-style) via
- *   useTabbyPosition, and the bubble/panel render in a self-clamping flyout so
- *   they never spill off any screen edge regardless of where the cat is docked.
+ *   from useSagiBrain; the avatar is draggable (AssistiveTouch-style) via
+ *   useSagiPosition, and the bubble/panel render in a self-clamping flyout so
+ *   they never spill off any screen edge regardless of where the mascot is docked.
  *
  *   The "do the job" path reuses the existing Run page: unmatched Ask queries
  *   deep-link to /run?prompt=…&autostart=1 - no new LLM backend.
@@ -15,7 +15,7 @@
 /* =============================================================================
  * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
  * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
  *
  * ## Design constraints
  * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
@@ -30,16 +30,16 @@
  * scoped GET via `?sources=`. Health checks and import history surface in Settings.
  *
  * ## Internal dependencies
- * - `./CatAvatar`
+ * - `./SagiAvatar`
  * - `./SpeechBubble`
- * - `./TabbyPanel`
- * - `./useTabbyBrain`
- * - `./useTabbyPosition`
+ * - `./SagiPanel`
+ * - `./useSagiBrain`
+ * - `./useSagiPosition`
  * - `./intents`
  * - `./prefs`
  *
  * ## Public surface
- * - `Tabby` — exported API; see TSDoc on the symbol for behavior.
+ * - `Sagi` — exported API; see TSDoc on the symbol for behavior.
  *
  * ## Testing pointers
  * - Prefer colocated `__tests__` with Vitest + Testing Library for UI.
@@ -54,7 +54,7 @@
 /* -----------------------------------------------------------------------------
  * EXPORT CATALOG — quick index of symbols defined below (documentation only).
  * -----------------------------------------------------------------------------
- * **Tabby**
+ * **Sagi**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
@@ -71,14 +71,14 @@ import {
   type ReactNode,
 } from "react";
 import { useNavigate } from "react-router-dom";
-import { CatAvatar } from "./CatAvatar";
+import { SagiAvatar } from "./SagiAvatar";
 import { SpeechBubble } from "./SpeechBubble";
-import { TabbyPanel } from "./TabbyPanel";
-import { useTabbyBrain } from "./useTabbyBrain";
-import { useTabbyPosition, TABBY_SIZE } from "./useTabbyPosition";
+import { SagiPanel } from "./SagiPanel";
+import { useSagiBrain } from "./useSagiBrain";
+import { useSagiPosition, SAGI_SIZE } from "./useSagiPosition";
 import { matchIntent } from "./intents";
-import { tabbyPrefs } from "./prefs";
-import "./tabby.css";
+import { sagiPrefs } from "./prefs";
+import "./sagi.css";
 
 const FLYOUT_GAP = 10; // px between avatar and flyout
 const VIEWPORT_MARGIN = 12; // min gap from any screen edge
@@ -113,7 +113,7 @@ function usePrefersReducedMotion(): boolean {
  * changes via ResizeObserver) so a tall panel near a screen edge slides fully
  * into view instead of being cropped.
  */
-function TabbyFlyout({ anchor, children }: { anchor: Anchor; children: ReactNode }) {
+function SagiFlyout({ anchor, children }: { anchor: Anchor; children: ReactNode }) {
   const ref = useRef<HTMLDivElement>(null);
   const [style, setStyle] = useState<CSSProperties>({ visibility: "hidden" });
 
@@ -129,8 +129,8 @@ function TabbyFlyout({ anchor, children }: { anchor: Anchor; children: ReactNode
     let left = anchor.side === "left" ? anchor.left : anchor.left + anchor.size - w;
     left = Math.min(vw - w - VIEWPORT_MARGIN, Math.max(VIEWPORT_MARGIN, left));
 
-    // Vertical: prefer above the cat (feels natural). Only drop below when
-    // there isn't room above - i.e. the cat is near the top edge.
+    // Vertical: prefer above the mascot (feels natural). Only drop below when
+    // there isn't room above - i.e. the mascot is near the top edge.
     const above = anchor.top - h - FLYOUT_GAP;
     const below = anchor.top + anchor.size + FLYOUT_GAP;
     let top = above >= VIEWPORT_MARGIN ? above : below;
@@ -153,22 +153,22 @@ function TabbyFlyout({ anchor, children }: { anchor: Anchor; children: ReactNode
   }, [place]);
 
   return (
-    <div ref={ref} className="tabby-flyout" style={style}>
+    <div ref={ref} className="sagi-flyout" style={style}>
       {children}
     </div>
   );
 }
 
-export function Tabby() {
-  const [enabled, setEnabled] = useState(() => tabbyPrefs.getEnabled());
+export function Sagi() {
+  const [enabled, setEnabled] = useState(() => sagiPrefs.getEnabled());
   const [open, setOpen] = useState(false);
   const reducedMotion = usePrefersReducedMotion();
   const navigate = useNavigate();
-  const brain = useTabbyBrain();
-  const place = useTabbyPosition();
+  const brain = useSagiBrain();
+  const place = useSagiPosition();
 
   // Keep enabled in sync with Settings / other tabs.
-  useEffect(() => tabbyPrefs.subscribe(() => setEnabled(tabbyPrefs.getEnabled())), []);
+  useEffect(() => sagiPrefs.subscribe(() => setEnabled(sagiPrefs.getEnabled())), []);
 
   // ⌘B / Ctrl+B toggles the panel; Esc closes it.
   useEffect(() => {
@@ -218,10 +218,10 @@ export function Tabby() {
 
   return (
     <>
-      {/* Flyouts are hidden while dragging so they don't chase the cat. */}
+      {/* Flyouts are hidden while dragging so they don't chase the mascot. */}
       {!place.dragging && open && (
-        <TabbyFlyout anchor={anchor}>
-          <TabbyPanel
+        <SagiFlyout anchor={anchor}>
+          <SagiPanel
             status={brain.status}
             muted={brain.muted}
             onToggleMute={brain.toggleMute}
@@ -230,19 +230,19 @@ export function Tabby() {
             onAsk={onAsk}
             onClose={() => setOpen(false)}
           />
-        </TabbyFlyout>
+        </SagiFlyout>
       )}
 
       {!place.dragging && !open && brain.bubble && (
-        <TabbyFlyout anchor={anchor}>
+        <SagiFlyout anchor={anchor}>
           <SpeechBubble text={brain.bubble} onDismiss={brain.dismissBubble} />
-        </TabbyFlyout>
+        </SagiFlyout>
       )}
 
       <button
-        className="tabby-avatar-btn"
+        className="sagi-avatar-btn"
         data-dragging={place.dragging ? "1" : "0"}
-        style={{ left: place.left, top: place.top, width: TABBY_SIZE, height: TABBY_SIZE }}
+        style={{ left: place.left, top: place.top, width: SAGI_SIZE, height: SAGI_SIZE }}
         onPointerDown={place.onPointerDown}
         onPointerMove={place.onPointerMove}
         onPointerUp={place.onPointerUp}
@@ -252,13 +252,13 @@ export function Tabby() {
           if (place.consumeDrag()) return;
           setOpen((v) => !v);
         }}
-        aria-label={open ? "Close Tabby" : "Open Tabby companion"}
+        aria-label={open ? "Close Sagi" : "Open Sagi companion"}
         aria-expanded={open}
-        title="Tabby - ⌘B · drag to move"
+        title="Sagi - ⌘B · drag to move"
       >
-        <CatAvatar mood={brain.mood} reducedMotion={reducedMotion} />
+        <SagiAvatar mood={brain.mood} reducedMotion={reducedMotion} />
         {brain.status.errorCount > 0 && (
-          <span className="tabby-error-dot" aria-hidden>
+          <span className="sagi-error-dot" aria-hidden>
             {brain.status.errorCount > 9 ? "9+" : brain.status.errorCount}
           </span>
         )}
diff --git a/client/src/components/Sagi/SagiAvatar.tsx b/client/src/components/Sagi/SagiAvatar.tsx
new file mode 100644
index 0000000..5f527a8
--- /dev/null
+++ b/client/src/components/Sagi/SagiAvatar.tsx
@@ -0,0 +1,784 @@
+/**
+ * @file SagiAvatar.tsx
+ * @description Pure presentational SVG mascot - Sagi, a blue superhero pig. Traced
+ *   from the user-provided mascot.svg (186 anonymous paths, no part grouping), so
+ *   only the eyes could be safely extracted into their own groups; everything else
+ *   renders as the original flat artwork. Eye pupils track the cursor and blink via
+ *   nested `sagi-eye-track` / `sagi-eye-blink` groups. Mood is expressed via a
+ *   `data-mood` attribute driving whole-mascot CSS transforms (bob/shake/tilt/breathe)
+ *   in sagi.css, plus zzz/bang/sparkle overlay glyphs layered above the artwork.
+ *   No data access - fully testable / reusable in isolation.
+ * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
+ */
+/* =============================================================================
+ * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
+ * =============================================================================
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
+ *
+ * ## Design constraints
+ * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
+ * - Fail-safe hooks path on the server must never block Claude Code; UI mirrors that
+ *   philosophy by degrading gracefully (empty states, stale badges, reconnect loops).
+ * - Destructive flows stay behind explicit confirmation modals and server-side gates.
+ * - Internationalization: user-visible strings belong in i18n JSON, not literals here.
+ *
+ * ## Internal dependencies
+ * - `./brain`
+ *
+ * ## Public surface
+ * - `SagiAvatar` — exported API; see TSDoc on the symbol for behavior.
+ *
+ * ## Testing pointers
+ * - Prefer colocated `__tests__` with Vitest + Testing Library for UI.
+ *
+ * ## Related docs
+ * - `ARCHITECTURE.md` — hooks → API → SQLite → WebSocket → UI pipeline.
+ * - `.claude/skills/file-headers/` — mandatory `@author` header policy.
+ * ============================================================================= */
+
+import { useEffect, useRef, useState } from "react";
+import type { Mood } from "./brain";
+
+interface SagiAvatarProps {
+  mood: Mood;
+  reducedMotion: boolean;
+  size?: number;
+}
+
+const MAX_PUPIL_SHIFT = 36; // px in the 0-1280 viewBox (scaled from the old 100x100 art)
+
+// Module-level last-known cursor position, tracked from the moment this module
+// first loads (well before any avatar mounts). This is what makes eye tracking
+// feel *immediate*: as soon as Sagi mounts it aims at wherever the cursor
+// already is, instead of sitting centered until the next mousemove. `null`
+// until the very first pointer event of the page's life.
+let lastCursor: { x: number; y: number } | null = null;
+if (typeof window !== "undefined") {
+  const remember = (e: MouseEvent) => {
+    lastCursor = { x: e.clientX, y: e.clientY };
+  };
+  // capture phase + passive so we never interfere with anything else.
+  window.addEventListener("mousemove", remember, { capture: true, passive: true });
+  window.addEventListener("pointermove", remember as EventListener, {
+    capture: true,
+    passive: true,
+  });
+}
+
+export function SagiAvatar({ mood, reducedMotion, size = 60 }: SagiAvatarProps) {
+  const rootRef = useRef<SVGSVGElement | null>(null);
+  const rafRef = useRef<number>();
+  const [pupil, setPupil] = useState({ x: 0, y: 0 });
+
+  // Pupils follow the cursor whenever motion is allowed and the eyes are open.
+  // (Only `sleeping` closes them by intent; `disconnected` hides the open-eye
+  // group via CSS, so tracking there is harmless and keeps eyes pre-aimed for
+  // the instant the connection returns.)
+  const tracking = !reducedMotion && mood !== "sleeping";
+
+  useEffect(() => {
+    if (!tracking) {
+      setPupil({ x: 0, y: 0 });
+      return;
+    }
+
+    const aimAt = (clientX: number, clientY: number) => {
+      const el = rootRef.current;
+      if (!el) return;
+      const r = el.getBoundingClientRect();
+      const cx = r.left + r.width / 2;
+      const cy = r.top + r.height / 2;
+      const dx = clientX - cx;
+      const dy = clientY - cy;
+      const dist = Math.hypot(dx, dy) || 1;
+      // Normalize then clamp to the eye socket range.
+      const nx = (dx / dist) * Math.min(1, dist / 240);
+      const ny = (dy / dist) * Math.min(1, dist / 240);
+      setPupil({ x: nx * MAX_PUPIL_SHIFT, y: ny * MAX_PUPIL_SHIFT });
+    };
+
+    // Immediately aim at the last-known cursor (next frame, so layout is ready)
+    // - no waiting for the user to move the mouse first.
+    let initRaf = 0;
+    if (lastCursor) {
+      const c = lastCursor;
+      initRaf = requestAnimationFrame(() => aimAt(c.x, c.y));
+    }
+
+    const onMove = (e: MouseEvent) => {
+      if (rafRef.current) return;
+      rafRef.current = requestAnimationFrame(() => {
+        rafRef.current = undefined;
+        aimAt(e.clientX, e.clientY);
+      });
+    };
+    window.addEventListener("mousemove", onMove, { passive: true });
+    return () => {
+      window.removeEventListener("mousemove", onMove);
+      if (initRaf) cancelAnimationFrame(initRaf);
+      if (rafRef.current) cancelAnimationFrame(rafRef.current);
+      rafRef.current = undefined;
+    };
+  }, [tracking]);
+
+  return (
+    <svg
+      ref={rootRef}
+      className="sagi-avatar"
+      data-mood={mood}
+      data-reduced={reducedMotion ? "1" : "0"}
+      width={size}
+      height={size}
+      viewBox="0 0 1280 1280"
+      role="img"
+      aria-label={`Sagi (${mood})`}
+    >
+      <path
+        transform="translate(430,173)"
+        d="m0 0h15l11 4 11 7 12 11 7 7 3 4 6-1 25-10 30-9 31-6 26-3 17-1h41l29 3 33 6 25 7 20 7 17 7 7-6 12-12 14-10 9-4 4-1h13l10 3 12 7 13 12 8 5 26 10 8 5 7 8 4 13 1 7v13l-3 23-5 13-7 8-7 3h-8l-8-1 14 24 11 27 7 23 4 22 2 17v40l-3 23-6 24-7 19-9 19-12 19-13 16-11 12-11 10-13 10-13 9-11 7h-2v6l3 3 15 8 16 10 12 9 11 9 18 18 12 17 5 11 4 13 1 7v20l-4 14-7 13-5 7 3 9 16 40 17 39 5 13 2 9v12l-4 14-6 11-9 10-11 9-15 9-7 1-2-2-1-7-1-19-2-10h-14l-12 6-13 11-14 9-11 4-18 2-3 7-7 28-7 23-4 10-6 8-7 6-9 3-6 1h-36l-9-2-6-4-6-7-7-15-9-29-4-1-22 3-14 1h-11l-25-2-19-2-8 25-5 13-6 11-7 6-6 2-7 1h-35l-12-3-6-4-7-7-6-13-11-38-6-21-18-2-11-4-10-6-11-9-11-8-7-3h-15l-2 16-1 20-1 1h-8l-15-9-9-7-9-9-7-11-5-15v-17l5-16 9-19 20-48 8-20v-5l-8-11-5-12-3-14v-11l2-14 5-14 6-11 9-12 11-12 10-10 17-13 15-10 21-12 1-7-24-16-13-10-13-12-12-12-11-14-10-16-8-15-9-22-7-27-3-21-1-18v-13l2-26 4-22 7-25 8-20 8-16 10-18-8 2h-8l-7-3-8-9-4-11-3-20v-19l2-12 4-8 5-6 8-5 25-9 10-6 11-11 11-7z"
+        fill="#17519E"
+      />
+      <path
+        transform="translate(629,184)"
+        d="m0 0h33l32 3 28 5 27 7 21 8 25 11 11 6 10 6 12 8 16 12 12 12 12 16 16 16 3 5v2l-2 1 8 16 5 12 5 13 6 25 3 19v38l-2 17-5 23-7 21-7 16-9 16-10 14-9 11-9 10-13 12-17 13-17 11-21 11-25 10-14 5-24 7-25 5-27 4-36 2h-31l-33-3-30-5-27-6-30-10-21-9-16-8-17-10-19-14-12-11-7-6-9-11-7-9-6-10-3-3-6-16-5-18-3-19-2-19v-17l2-24 4-24 5-17 7-21 10-21 11-18 8-12 17-17 10-13 4-5 8-7 13-10 18-12 12-7 26-12 21-8 16-5 33-7 21-3z"
+        fill="#17519E"
+      />
+      <path
+        transform="translate(430,173)"
+        d="m0 0h15l11 4 11 7 12 11 7 7 3 4 6-1 25-10 30-9 31-6 26-3 17-1h41l29 3 33 6 25 7 20 7 17 7 7-6 12-12 14-10 9-4 4-1h13l10 3 12 7 13 12 8 5 26 10 8 5 7 8 4 13 1 7v13l-3 23-5 13-7 8-7 3h-8l-8-1 14 24 11 27 7 23 4 22 2 17v40l-3 23-6 24-7 19-9 19-12 19-13 16-11 12-11 10-13 10-13 9-11 7h-2v6l3 3 15 8 16 10 12 9 11 9 18 18 12 17 5 11 4 13 1 7v20l-4 14-7 13-5 7 3 9 16 40 17 39 5 13 2 9v12l-4 14-6 11-9 10-11 9-15 9-7 1-2-2-1-7-1-19-2-10h-14l-12 6-13 11-14 9-11 4-18 2-3 7-7 28-7 23-4 10-6 8-7 6-9 3-6 1h-36l-9-2-6-4-6-7-7-15-9-29-4-1-22 3-14 1h-11l-25-2-19-2-8 25-5 13-6 11-7 6-6 2-7 1h-35l-12-3-6-4-7-7-6-13-11-38-6-21-18-2-11-4-10-6-11-9-11-8-7-3h-15l-2 16-1 20-1 1h-8l-15-9-9-7-9-9-7-11-5-15v-17l5-16 9-19 20-48 8-20v-5l-8-11-5-12-3-14v-11l2-14 5-14 6-11 9-12 11-12 10-10 17-13 15-10 21-12 1-7-24-16-13-10-13-12-12-12-11-14-10-16-8-15-9-22-7-27-3-21-1-18v-13l2-26 4-22 7-25 8-20 8-16 10-18-8 2h-8l-7-3-8-9-4-11-3-20v-19l2-12 4-8 5-6 8-5 25-9 10-6 11-11 11-7zm199 11-32 2-25 4-29 6-30 10-29 13-21 12-14 10-13 10-9 8-10 13-9 10-11 11-12 19-10 18-8 18-5 16-6 21-4 29-1 15v17l4 34 5 19 6 17 2 4 3 3 7 11 11 13 5 6 8 7 10 9 14 10 11 7 17 10 25 11 28 10 24 6 21 4 27 4 25 2h31l36-2 34-5 29-7 22-7 25-10 21-10 16-10 14-10 13-11 12-11 9-10 9-12 9-13 9-17 5-12 7-21 6-29 1-11v-38l-4-24-5-20-7-19-7-15-4-7 2-1-2-5-7-8-11-11-12-16-12-12-19-14-13-8-10-6-17-8-24-10-15-5-23-6-36-6-24-2zm-173 455-21 11-15 10-13 10v2l-4 2-15 15-11 14-6 12-4 12-2 10v16l4 14 7 12 15 15 7 5 6 3 1 3-12-1-2 3v6l5 6 7 4 5 1h13l9-3 12-9 5-42-1-6-6-10-9-12-8-10v-4l6 1 13 13 12-7 3-7 10-30 4-6h3l-1 8-6 18-7 28-5 25-3 19-2 22v22l2 23 4 21 6 16 7 16 8 12 12 16v4l-5-2-9-9-1 3 13 53 9 29 6 10 8 7 5 2 17 2h14l15-2 6-4 6-10 12-36-7-3-17-6-5-2v-3l4-1 39 9 27 3h31l23-3 28-6 7-2 10-1-2 5-24 8-3 2 2 9 9 26 6 11 10 5 27 1 13-1 11-4 7-8 5-12 9-32 8-29 3-17v-3l-4 2-8 8-3 1 3-7 7-9 8-11 8-16 6-15 5-22 2-18v-38l-2-21-6-34-11-40-5-17v-2l4 1 4 6 6 16 5 17 4 4 7 5h4l7-9 6-4 6-1-3 7-9 10-10 15-3 7v9l2 11 2 22 2 5 9 7 9 4h16l10-5 4-4 1-9-1-2-13 1v-4l9-3 9-7 7-8 6-7 7-14 2-7v-22l-4-14-5-12-7-10-9-11-13-13-14-11-13-9-21-12-6-2-12 12-14 11-10 7-14 8-16 8-21 8-29 8-1 4 5 11 4 14 1 20-1 2-14-1-16-5-8-4-5-3-12-11-4-5-5-11-3-7-16 1-4 9-6 12-16 16h3l-8 2-5 2-13 5-8 1-10-1-1-1v-9l2-14 5-16 4-8v-2l-24-7-18-6-18-8-20-11-16-11-12-11-10-9z"
+        fill="#06080D"
+      />
+      <path
+        transform="translate(645,705)"
+        d="m0 0 4 1 5 13 5 8 9 9 6 5 20 8 13 4-1 36 28-10 10-2-1 107-30 10-43 14-36 12h-4v-22l-8 3-5 1-1-3v-9l-13 4-34 12-7 1v-14l10-4h3v-41l-36 13h-2l-1-93v-12l1-4 18-6 8-3 1 8 1 1 11 1 9-2 14-5 4-1 5-2-2-1 13-12 4-5 5-10 4-9z"
+        fill="#2D3374"
+      />
+      <path
+        transform="translate(804,692)"
+        d="m0 0 2 2 12 42 5 20 5 29 2 21v38l-3 23-5 20-9 21-10 16-8 9-3 5-1 4 5-3 8-8h2l-2 14-4 16-12 45-6 16-7 9-8 4-4 1-16 1-24-1-10-5-7-14-10-29 1-4 19-7 7-2 2-5-14 2-25 6-21 3-8 1h-31l-27-3-30-7-11-2-2 2v2l5 2 17 6 7 3-12 36-6 10-6 4-15 2h-14l-17-2-8-4-8-9-5-12-7-23-13-53 1-3 10 10 4 1-1-5-7-10-9-26-2-5 1-4 4 8 10 10 14 10 17 10 18 8 23 7 23 5 24 3h49l18-2 25-5 17-5 14-6 20-11 12-9 10-9 9-10 12-19 8-17 5-15 5-25 2-20v-44l-5-43-2-13v-7z"
+        fill="#0F347E"
+      />
+      <path
+        transform="translate(887,300)"
+        d="m0 0 4 4 6 11 6 9 8 17 7 18 6 22 4 25 1 10v38l-2 18-3 14-7 23-7 17-10 18-6 9-9 13h-2l-2 4h-2l-2 4-16 16h-2l-1 3-16 12-13 8-22 12-21 9-19 7-22 6-18 4-23 4-29 3-19 1h-34l-38-3-25-4-23-5-22-6-20-7-18-8-16-8-12-7-10-7-11-8-11-9-16-16-11-14-15-23-5-11 1-3 9 14 11 13 4 5 8 7 10 9 14 10 11 7 17 10 25 11 28 10 24 6 21 4 27 4 25 2h31l36-2 34-5 29-7 22-7 25-10 21-10 16-10 14-10 13-11 12-11 13-15 14-21 8-15 5-12 7-21 6-29 1-11v-38l-4-24-5-20-7-19-7-15-4-8z"
+        fill="#0F347E"
+      />
+      <path
+        transform="translate(659,735)"
+        d="m0 0h3v13l14-4h6l9 4 16 5-1 36 28-10 10-2-1 107-30 10-43 14-36 12h-4v-109l10-4 9-3 1-65z"
+        fill="#4BA1C2"
+      />
+      <path
+        transform="translate(636,416)"
+        d="m0 0 17 1 17 4 15 7 10 8 8 9 5 12 1 12-2 10-6 12-10 10-8 5-17 6-8 2h-34l-10-2-13-4-14-9-8-9-5-9-2-8v-15l5-13 10-11 12-8 13-5 16-4z"
+        fill="#7ED1DA"
+      />
+      <path
+        transform="translate(629,184)"
+        d="m0 0h33l32 3 28 5 27 7 21 8 25 11 11 6 10 6 12 8 16 12 12 12 12 16 16 16 3 5-1 2-5-3-3-6-6-4-5-7-8-7-10-9-16-12-19-12-27-14-21-8-22-7-30-7-28-4-27-2h-33l-26 2-17 1v2l3 1 2 3v6l-6 9-10 7-12 6-16 5-13 2h-15l-8-3-4-4v-8l2-4-17 8-23 13-14 10-16 12-12 11-14 15-13 18-11 18-10 19-8 21-6 23-5 26-1 6v52l-2-3-3-27v-17l2-24 4-24 5-17 7-21 10-21 11-18 8-12 17-17 10-13 4-5 8-7 13-10 18-12 12-7 26-12 21-8 16-5 33-7 21-3z"
+        fill="#70A2CD"
+      />
+      <path
+        transform="translate(432,181)"
+        d="m0 0h12l9 3 13 9 5 4v2h2l7 8 1 5-7 4-16 9-8 6-10 7h-2l2-9 4-16v-10h-3l-3 9-4 13-12 26-7 10-6 8-14 14-11 8-12 4-8-1-6-8-4-10-2-19v-12l2-14 3-6 8-7 10-4 15-5h2l-2 7-1 9h3l2-5 9-17 8-10 13-9z"
+        fill="#16519E"
+      />
+      <path
+        transform="translate(836,181)"
+        d="m0 0h12l12 5 11 9 8 10 10 19 2 2 1-7-4-10 9 2 18 7 8 6 3 5 2 9v25l-1 12-5 13-5 6-8 1-11-4-11-7-10-9-8-8-8-14-7-10-8-19-6-19v-2h-3v11l6 24-4-2-18-12-14-8-8-5 4-6 10-11 13-9z"
+        fill="#17519E"
+      />
+      <g className="sagi-eye sagi-eye-left">
+        <g
+          className="sagi-eye-track"
+          style={{ transform: `translate(${pupil.x}px, ${pupil.y}px)` }}
+        >
+          <g className="sagi-eye-blink">
+            <path
+              transform="translate(503,354)"
+              d="m0 0h15l12 4 8 5 8 7 3 4v2h2l5 13v21l-4 11-7 11-7 6-10 6-5 2h-19l-9-2-12-7-10-10-6-12-2-9v-9l2-11 4-9 7-9 8-7 10-5z"
+              fill="#020406"
+            />
+            <path
+              transform="translate(498,338)"
+              d="m0 0h13l17 4 15 8v2l4 2 9 10 6 11 4 13v18l-2 13-5 12-3 5h-2l-2 4-7 8-10 7-5 2-8 3-7 2h-16l-13-3-10-4-12-9-5-4-9-13-4-11-2-8v-20l4-14 7-12 9-10 9-7 8-4 9-3zm5 16-12 4-11 8-7 8-4 6-3 9-1 8v9l2 9 6 12 10 10 12 7 9 2h19l12-6 9-7 7-10 4-10 1-3v-21l-5-13h-2l-2-4-6-7-9-6-10-4-4-1z"
+              fill="#F9FBFC"
+            />
+            <path
+              transform="translate(523,371)"
+              d="m0 0h9l5 3 2 3v9l-3 5-5 3-9-1-5-6-1-2v-7l5-6z"
+              fill="#F6F9FB"
+            />
+          </g>
+        </g>
+      </g>
+      <g className="sagi-eye sagi-eye-right">
+        <g
+          className="sagi-eye-track"
+          style={{ transform: `translate(${pupil.x}px, ${pupil.y}px)` }}
+        >
+          <g className="sagi-eye-blink">
+            <path
+              transform="translate(764,354)"
+              d="m0 0h12l13 4 12 8 9 12 4 11 1 7v9l-2 9-7 14-5 6-11 8-7 3-6 1h-19l-12-5v-2l-5-2-5-5-7-9-4-10-1-4v-19l2-7 9-14 10-8h2v-2l10-4z"
+              fill="#020406"
+            />
+            <path
+              transform="translate(770,338)"
+              d="m0 0h10l14 3 10 4 10 7 5 4v2h2l7 10 5 11 2 5 1 9v18l-4 13-5 10-7 9h-2v2l-4 3h-2v2l-10 6-6 1v2l-11 3h-16l-15-3-10-5-10-8-9-10-4-7-5-12-2-9v-19l6-17 8-13h2l1-3h2v-2h2v-2l14-9 12-4zm-6 16-10 2-7 3v2l-5 2-8 7-6 9-3 6-1 5v19l3 10 6 10 6 7 5 3h2v2l12 5h19l9-2 10-6 6-5 6-8 6-13 1-7v-9l-2-10-4-9-6-8-5-5-11-7-11-3z"
+              fill="#F9FBFC"
+            />
+            <path
+              transform="translate(781,371)"
+              d="m0 0h10l5 4 1 2v8l-2 5-4 3-7 1-6-3-4-7 1-7 4-5z"
+              fill="#F4F8FA"
+            />
+          </g>
+        </g>
+      </g>
+      <path
+        transform="translate(440,824)"
+        d="m0 0h2l2 30 2 16 2 6 2 9 6 17 4 8 4 9 5 26v4h-15l-10-4-9-6-9-8-11-7-10-5-16-2 1-17 5-28 5-23 5-18h19l9-3z"
+        fill="#3098A7"
+      />
+      <path
+        transform="translate(839,824)"
+        d="m0 0 5 2 12 5 20 1 4 15 6 27 4 24 1 9v10l-16 2-10 5-13 9-10 9-12 6-10 2-9-1 3-17 3-15 7-14 4-10 3-8 5-27z"
+        fill="#2F98A7"
+      />
+      <path
+        transform="translate(898,796)"
+        d="m0 0 4 2 8 21 19 45 10 23 4 12v8l-3 11-4 8-9 12-9 8-13 8h-2l-2-27-6-43-5-26-6-25v-5l8-6 3-5 1-5v-14z"
+        fill="#3CCCD4"
+      />
+      <path
+        transform="translate(380,796)"
+        d="m0 0 4 2 1 3-1 9 3 10 4 5 5 3-1 10-4 17-5 26-3 16-3 25-2 32-6-2-10-6v-2l-4-2-7-7-9-14-3-9v-17l8-22 7-15 6-13 16-40z"
+        fill="#3CCCD4"
+      />
+      <path
+        transform="translate(844,451)"
+        d="m0 0h14l10 4 8 6 7 7 4 9 2 8v8l-3 11-6 9-8 8-8 4-8 2h-12l-13-5-8-7-6-7-4-10-1-3v-12l4-11 6-8 9-8 9-4z"
+        fill="#7DD1DA"
+      />
+      <path
+        transform="translate(424,451)"
+        d="m0 0h13l10 4 9 6 7 9 5 12v15l-7 14-7 8-8 5-10 3h-12l-11-4-9-6-7-8-5-11v-17l5-12 9-10 8-5z"
+        fill="#7DD1DA"
+      />
+      <path
+        transform="translate(474,931)"
+        d="m0 0 7 6 6 7 3 5 13 11 20 13 12 7 14 7 5 6 2 8-3 16-4 9-5 6-8 2h-24l-6-4-7-8-5-12-7-23-13-53z"
+        fill="#17529E"
+      />
+      <path
+        transform="translate(712,800)"
+        d="m0 0h5l1 2v13l-33 11-7 5-5 11v21l2 7 4 1h7l14-5v-14l-16 5v-15l10-5 20-6h4v44l-5 4-30 10h-11l-9-4-5-7-2-5-1-6v-20l2-10 6-12 6-7 10-6z"
+        fill="#FEFEFE"
+      />
+      <path
+        transform="translate(620,740)"
+        d="m0 0h2v16l-13 4-11 4-14 4-6 4-1 9 5 2 10-3 10-4 4-1h13l5 7 1 3v13l-1 7-7 10-10 7-20 7-19 6-1 1h-5v-16l16-5 17-6 9-3v-2h2l1-9-1-1h-7l-18 6-5 1h-10v-2l-3-1-4-9v-12l3-10 4-6 11-7 22-8 4-1z"
+        fill="#F9FBFC"
+      />
+      <path
+        transform="translate(776,960)"
+        d="m0 0h5l2 3v13l-4 19-2 8-7 25-3 7-4 1-16 1-3-2-11-1-6-9-2-9v-18l3-6 12-10 15-10 10-6z"
+        fill="#17519E"
+      />
+      <path
+        transform="translate(462,629)"
+        d="m0 0 4 1 10 5 8 3 11 5 24 7 17 5 23 5 15 2 3 1 15 2 23 1-1 9-1 2-7 2-11-1-20-4-6-2-4 1 10 5 13 4 6 1-5 5-7 6-11-1-23-6-19-8-8-3-10-6-8-4-15-10-14-11-11-11z"
+        fill="#3ECDD4"
+      />
+      <path
+        transform="translate(816,629)"
+        d="m0 0h2l-1 5-7 8-13 11-16 11-22 12-8 4-17 6-9 3-21 5h-6l-11-10 3-2 13-3 11-3 7-4v-1h-7l-7 3-22 4h-16l-4-6v-5l2-1 38-3 28-6 26-6 17-5 20-8 12-5z"
+        fill="#3FCBD4"
+      />
+      <path
+        transform="translate(628,410)"
+        d="m0 0h26l16 4 12 5 8 4 13 10 7 10 5 13 1 5v15l-4 11-7 10-5 6-13 9-11 5-19 5-9 1h-15l-14-2-17-5-14-7-12-11-8-11-4-13v-11l2-11 7-14 9-9 10-7 15-7 14-4zm8 6-18 3-12 4-12 6-10 8-8 10-4 11v15l3 10 7 11 9 8 10 6 15 5 8 1h34l14-4 13-5 9-7 7-7 6-12 2-10-1-12-5-12-11-12-8-6-14-6-17-4z"
+        fill="#030509"
+      />
+      <path
+        transform="translate(365,737)"
+        d="m0 0 4 4 9 17 9 12 11 12 13 9 13 5h8l5-3 3-7h2l2-7h1l-1 16-2 17-12 9-9 3h-13l-9-3-7-6-1-2v-6l3-3 11 1-2-4-8-4-12-11-7-7-7-12-4-14z"
+        fill="#10347E"
+      />
+      <path
+        transform="translate(913,728)"
+        d="m0 0h1l1 5v22l-4 12-7 12-15 15-5 4-9 3v4l13-1 1 2-1 9-7 6-7 3h-16l-12-6-7-6-2-15-2-21h2l3 8 4 10 4 3h10l12-5 13-10 7-7 10-13 10-19z"
+        fill="#11347E"
+      />
+      <path
+        transform="translate(564,474)"
+        d="m0 0h1l4 13 8 11 7 7 13 8 18 6 9 2 9 1h15l14-2 17-5 13-7 10-8 7-10 5-10 1-4h2l-3 16-7 14-7 9-11 9-14 7-17 4-7 1h-19l-17-3-11-4-12-6-6-4v-2l-4-2-5-5-6-8-5-11-2-9z"
+        fill="#10347E"
+      />
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+        fill="#AADFE6"
+      />
+      <path transform="translate(898,796)" d="m0 0 4 2 1 7h-5l-2-3 1-5z" fill="#EEF4F8" />
+      <path transform="translate(727,684)" d="m0 0h7v2l-9 3-13 3 3-3 11-3z" fill="#478EB9" />
+      <path transform="translate(396,219)" d="m0 0v3l-5 8-4-1-1-2v-7h2l1 5h3l2-5z" fill="#1A357C" />
+      <path transform="translate(723,531)" d="m0 0 2 1-10 7-7 4h-2l2-4z" fill="#1D357C" />
+      <path transform="translate(822,359)" d="m0 0 5 5 2-3 1 1 1 9 2 6-3-3-7-12z" fill="#153B81" />
+      <path transform="translate(699,544)" d="m0 0 4 1-12 5-9 2v-2l12-4z" fill="#1B347B" />
+      <path transform="translate(630,829)" d="m0 0 1 3v16h-3v-16z" fill="#103983" />
+      <path transform="translate(655,678)" d="m0 0h2v10l-5 4 1-13z" fill="#2F98A8" />
+      <path transform="translate(758,673)" d="m0 0h3v2l-10 5-6 1-1-2 10-5z" fill="#549FC3" />
+      <path transform="translate(677,746)" d="m0 0h8l5 2-2 2-13-1-1-2z" fill="#6DA1CC" />
+      <path transform="translate(690,423)" d="m0 0 5 2 6 3 8 10-2 2-6-8-11-8z" fill="#1F347A" />
+      <path transform="translate(537,836)" d="m0 0h1v22l9-1-3 2-7 2z" fill="#0F357F" />
+      <path transform="translate(460,781)" d="m0 0h1v16l-1 6-2-2v-15z" fill="#77C5D6" />
+      <path transform="translate(622,682)" d="m0 0h2l3 4 3 1 1 4-5 2-4-9z" fill="#4B9DBE" />
+      <path transform="translate(623,675)" d="m0 0h4l1 12-5-5z" fill="#3BCED5" />
+      <path transform="translate(737,349)" d="m0 0 2 1-4 2v2h-2v2l-4 2v-7l1-1z" fill="#173A80" />
+      <path transform="translate(878,289)" d="m0 0 6 5 3 5-1 2-5-3-3-6z" fill="#71B5D1" />
+      <path transform="translate(842,210)" d="m0 0h2l4 10 2 4v5h-2l-6-18z" fill="#2A3477" />
+      <path transform="translate(379,213)" d="m0 0h2l1 3-6 3-7-2 4-2z" fill="#70A1CD" />
+      <path transform="translate(839,824)" d="m0 0 5 2 5 3-2 1-7-1v12h-1z" fill="#5E9DC6" />
+      <path transform="translate(803,645)" d="m0 0 2 1-8 7-8 5 2-4h2l2-4z" fill="#75BBD3" />
+      <path transform="translate(652,554)" d="m0 0h11l3 2-16 1-5-1v-1z" fill="#1E347A" />
+      <path transform="translate(706,678)" d="m0 0 4 1-10 4-10 2 2-3 11-3z" fill="#4895BB" />
+      <path transform="translate(455,869)" d="m0 0 4 2v8l1 6-2-1-3-11z" fill="#7ECBD9" />
+      <path transform="translate(672,690)" d="m0 0 6 3 4 4v2l-6-2-5-6z" fill="#3CCAD3" />
+      <path transform="translate(461,914)" d="m0 0 2 3 1 2v7l-2 5-1-4z" fill="#4C98BE" />
+      <path transform="translate(662,711)" d="m0 0 5 2h2l1 4-3 1-2 2-4-8z" fill="#309AA9" />
+      <path transform="translate(739,656)" d="m0 0 9 1-4 2-3 1h-7l1-3z" fill="#51A1C4" />
+      <path transform="translate(823,639)" d="m0 0 4 2 1 2h-2l-2 4-4-3 2-4z" fill="#588FBC" />
+      <path transform="translate(437,205)" d="m0 0h3l-3 12h-3l1-6z" fill="#1E347A" />
+      <path transform="translate(575,466)" d="m0 0h1l1 13 1 3-2 3-3-9 1-3z" fill="#6EA3CD" />
+      <path transform="translate(836,402)" d="m0 0h1l1 5h1v13l-2-2-1-7z" fill="#0F357F" />
+      <path transform="translate(858,832)" d="m0 0h18l-3 2-7 1-8-1z" fill="#244188" />
+      <path transform="translate(676,728)" d="m0 0 12 6-1 3h-3l-5-5-3-2z" fill="#399BAF" />
+      <path
+        transform="translate(630,689)"
+        d="m0 0 4 1-1 2h-2l4 5-6-1-2-2 1-4v2l2-2z"
+        fill="#6B9FCB"
+      />
+      <path transform="translate(343,922)" d="m0 0h3l1 4 3-4v9l-5-5z" fill="#7CCBD9" />
+      <path transform="translate(666,685)" d="m0 0 9 2v3l-2 1-8-4z" fill="#88C8D9" />
+      <path transform="translate(461,350)" d="m0 0h7l-6 7-3 2 2-4z" fill="#1E347A" />
+      <path transform="translate(380,796)" d="m0 0 4 2 1 3h-5v2h-2l1-6z" fill="#DFEFF4" />
+      <path transform="translate(611,685)" d="m0 0 4 1v5l-3 1-4-1 1-2h4v-2h-2z" fill="#92D1DE" />
+      <path transform="translate(549,443)" d="m0 0 1 4v3h-8l5-5z" fill="#113780" />
+      <path transform="translate(608,770)" d="m0 0h8v2l2 1v2l-7-1v-2h-3z" fill="#0B2455" />
+      <path transform="translate(467,718)" d="m0 0h3l1 7-2 1v-2h-2l-1 2z" fill="#6FAACF" />
+      <path transform="translate(496,660)" d="m0 0 7 2 1 3 5 2 1 2-6-2-8-6z" fill="#70B7D1" />
+      <path transform="translate(617,703)" d="m0 0 3 1-1 4-5 1 1-5z" fill="#47A0BF" />
+      <path transform="translate(756,510)" d="m0 0 4 1 1 3-5 1-3 3-2-1z" fill="#213479" />
+      <path transform="translate(715,476)" d="m0 0h2l-2 11-5 3 2-5z" fill="#1C347B" />
+
+      {/* mood overlay glyphs - new additions, not extracted from mascot art */}
+      <g className="sagi-zzz">
+        <text x="990" y="260">
+          z
+        </text>
+        <text x="1075" y="150">
+          z
+        </text>
+      </g>
+      <g className="sagi-bang">
+        <text x="1020" y="260">
+          !
+        </text>
+      </g>
+      <g className="sagi-sparkle">
+        <path d="M1050 380 l18 46 l46 18 l-46 18 l-18 46 l-18 -46 l-46 -18 l46 -18 z" />
+      </g>
+    </svg>
+  );
+}
diff --git a/client/src/components/Tabby/TabbyPanel.tsx b/client/src/components/Sagi/SagiPanel.tsx
similarity index 93%
rename from client/src/components/Tabby/TabbyPanel.tsx
rename to client/src/components/Sagi/SagiPanel.tsx
index cbb7e86..4f1e709 100644
--- a/client/src/components/Tabby/TabbyPanel.tsx
+++ b/client/src/components/Sagi/SagiPanel.tsx
@@ -1,6 +1,6 @@
 /**
- * @file TabbyPanel.tsx
- * @description Expanded Tabby panel: a live status strip (live / waiting /
+ * @file SagiPanel.tsx
+ * @description Expanded Sagi panel: a live status strip (live / waiting /
  *   errored stat chips + connection state), quick navigation actions, and a
  *   local "Ask" box. Pure presentational - all data and the ask/navigation
  *   behavior are injected by the container.
@@ -9,7 +9,7 @@
 /* =============================================================================
  * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
  * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
  *
  * ## Design constraints
  * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
@@ -27,7 +27,7 @@
  * - `./brain`
  *
  * ## Public surface
- * - `TabbyPanel` — exported API; see TSDoc on the symbol for behavior.
+ * - `SagiPanel` — exported API; see TSDoc on the symbol for behavior.
  *
  * ## Testing pointers
  * - Prefer colocated `__tests__` with Vitest + Testing Library for UI.
@@ -42,7 +42,7 @@
 /* -----------------------------------------------------------------------------
  * EXPORT CATALOG — quick index of symbols defined below (documentation only).
  * -----------------------------------------------------------------------------
- * **TabbyPanel**
+ * **SagiPanel**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
@@ -64,10 +64,10 @@ import {
   Radio,
   type LucideIcon,
 } from "lucide-react";
-import type { TabbyStatus } from "./brain";
+import type { SagiStatus } from "./brain";
 
-interface TabbyPanelProps {
-  status: TabbyStatus;
+interface SagiPanelProps {
+  status: SagiStatus;
   muted: boolean;
   onToggleMute: () => void;
   onClearAlerts: () => void;
@@ -77,7 +77,7 @@ interface TabbyPanelProps {
   onClose: () => void;
 }
 
-export function TabbyPanel({
+export function SagiPanel({
   status,
   muted,
   onToggleMute,
@@ -85,7 +85,7 @@ export function TabbyPanel({
   onNavigate,
   onAsk,
   onClose,
-}: TabbyPanelProps) {
+}: SagiPanelProps) {
   const [query, setQuery] = useState("");
   const [answer, setAnswer] = useState<string | null>(null);
 
@@ -100,7 +100,7 @@ export function TabbyPanel({
     <div
       className="w-72 overflow-hidden rounded-2xl border border-border-light bg-surface-2/95 shadow-2xl shadow-black/50 backdrop-blur-md animate-slide-up"
       role="dialog"
-      aria-label="Tabby companion"
+      aria-label="Sagi companion"
     >
       {/* header */}
       <div className="flex items-center justify-between gap-2 border-b border-border/70 bg-gradient-to-r from-accent/10 to-transparent px-3.5 py-2.5">
@@ -108,7 +108,7 @@ export function TabbyPanel({
           <span className="text-base leading-none" aria-hidden>
             🐾
           </span>
-          <span className="text-sm font-semibold text-fg-primary">Tabby</span>
+          <span className="text-sm font-semibold text-fg-primary">Sagi</span>
           <span
             className={`ml-0.5 inline-flex items-center gap-1 rounded-full px-1.5 py-0.5 text-[10px] font-medium ${
               status.connected
@@ -128,7 +128,7 @@ export function TabbyPanel({
         <button
           className="rounded-md p-1 text-fg-muted transition-colors hover:bg-surface-4 hover:text-fg-secondary"
           onClick={onClose}
-          aria-label="Close Tabby"
+          aria-label="Close Sagi"
         >
           <X size={15} />
         </button>
@@ -189,10 +189,10 @@ export function TabbyPanel({
         <form onSubmit={submit} className="flex items-center gap-1.5">
           <input
             className="flex-1 rounded-lg border border-border bg-surface-1 px-2.5 py-1.5 text-xs text-fg-secondary placeholder-fg-muted transition-colors focus:border-accent focus:outline-none focus:ring-1 focus:ring-accent/30"
-            placeholder="Ask Tabby… (e.g. any errors?)"
+            placeholder="Ask Sagi… (e.g. any errors?)"
             value={query}
             onChange={(e) => setQuery(e.target.value)}
-            aria-label="Ask Tabby"
+            aria-label="Ask Sagi"
           />
           <button
             type="submit"
diff --git a/client/src/components/Tabby/SpeechBubble.tsx b/client/src/components/Sagi/SpeechBubble.tsx
similarity index 88%
rename from client/src/components/Tabby/SpeechBubble.tsx
rename to client/src/components/Sagi/SpeechBubble.tsx
index 2c879c1..14a948c 100644
--- a/client/src/components/Tabby/SpeechBubble.tsx
+++ b/client/src/components/Sagi/SpeechBubble.tsx
@@ -1,8 +1,8 @@
 /**
  * @file SpeechBubble.tsx
- * @description Transient speech bubble rendered above the Tabby cat mascot.
+ * @description Transient speech bubble rendered above the Sagi mascot.
  * Pure presentation — visibility timing and quip selection live in
- * {@link useTabbyBrain}; this component only paints the bubble and handles
+ * {@link useSagiBrain}; this component only paints the bubble and handles
  * user dismissal.
  *
  * ## Accessibility
@@ -15,7 +15,7 @@
 /* =============================================================================
  * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
  * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
  *
  * ## Design constraints
  * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
@@ -61,13 +61,13 @@ interface SpeechBubbleProps {
 }
 
 /**
- * Animated speech bubble above Tabby.
+ * Animated speech bubble above Sagi.
  * @param props See {@link SpeechBubbleProps}.
  */
 export function SpeechBubble({ text, onDismiss }: SpeechBubbleProps) {
   return (
     <div
-      className="tabby-bubble tabby-bubble-enter"
+      className="sagi-bubble sagi-bubble-enter"
       role="status"
       aria-live="polite"
       onClick={onDismiss}
diff --git a/client/src/components/Tabby/__tests__/Tabby.test.tsx b/client/src/components/Sagi/__tests__/Sagi.test.tsx
similarity index 66%
rename from client/src/components/Tabby/__tests__/Tabby.test.tsx
rename to client/src/components/Sagi/__tests__/Sagi.test.tsx
index 041cf8c..b4752b1 100644
--- a/client/src/components/Tabby/__tests__/Tabby.test.tsx
+++ b/client/src/components/Sagi/__tests__/Sagi.test.tsx
@@ -1,20 +1,20 @@
 /**
- * @file Tabby.test.tsx
- * @description Render tests for the Tabby companion component — mounting, mood rendering, the ⌘B panel toggle, and accessibility attributes.
+ * @file Sagi.test.tsx
+ * @description Render tests for the Sagi companion component — mounting, mood rendering, the ⌘B panel toggle, and accessibility attributes.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 
 import { describe, it, expect, beforeEach, afterEach, vi } from "vitest";
 import { render, screen, fireEvent, act, cleanup, within } from "@testing-library/react";
 import { MemoryRouter } from "react-router-dom";
-import { Tabby } from "../Tabby";
+import { Sagi } from "../Sagi";
 import { eventBus } from "../../../lib/eventBus";
 import type { WSMessage, Session } from "../../../lib/types";
 
-function renderTabby() {
+function renderSagi() {
   return render(
     <MemoryRouter>
-      <Tabby />
+      <Sagi />
     </MemoryRouter>
   );
 }
@@ -38,27 +38,27 @@ afterEach(() => {
   vi.useRealTimers();
 });
 
-describe("Tabby widget", () => {
+describe("Sagi widget", () => {
   it("renders the avatar button by default", () => {
-    renderTabby();
-    expect(screen.getByRole("button", { name: /open tabby companion/i })).toBeInTheDocument();
-    expect(screen.getByRole("img", { name: /tabby/i })).toBeInTheDocument();
+    renderSagi();
+    expect(screen.getByRole("button", { name: /open sagi companion/i })).toBeInTheDocument();
+    expect(screen.getByRole("img", { name: /sagi/i })).toBeInTheDocument();
   });
 
   it("opens the panel on click and answers a local status question", () => {
-    renderTabby();
-    fireEvent.click(screen.getByRole("button", { name: /open tabby companion/i }));
-    const panel = screen.getByRole("dialog", { name: /tabby companion/i });
+    renderSagi();
+    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
+    const panel = screen.getByRole("dialog", { name: /sagi companion/i });
     expect(panel).toBeInTheDocument();
 
-    const input = within(panel).getByLabelText(/ask tabby/i);
+    const input = within(panel).getByLabelText(/ask sagi/i);
     fireEvent.change(input, { target: { value: "status" } });
     fireEvent.submit(input.closest("form")!);
     expect(within(panel).getByText(/live ·/i)).toBeInTheDocument();
   });
 
   it("toggles open/closed with Cmd/Ctrl+B and closes with Esc", () => {
-    renderTabby();
+    renderSagi();
     expect(screen.queryByRole("dialog")).not.toBeInTheDocument();
     act(() => {
       fireEvent.keyDown(window, { key: "b", metaKey: true });
@@ -71,47 +71,47 @@ describe("Tabby widget", () => {
   });
 
   it("shows an error badge when a session errors", () => {
-    renderTabby();
+    renderSagi();
     act(() => {
       eventBus.publish(sessionMsg("a", "error"));
     });
-    const btn = screen.getByRole("button", { name: /open tabby companion/i });
+    const btn = screen.getByRole("button", { name: /open sagi companion/i });
     expect(within(btn).getByText("1")).toBeInTheDocument();
   });
 
   it("reflects the live count in the panel status", () => {
-    renderTabby();
+    renderSagi();
     act(() => {
       eventBus.publish(sessionMsg("a", "active"));
       eventBus.publish(sessionMsg("b", "active"));
     });
-    fireEvent.click(screen.getByRole("button", { name: /open tabby companion/i }));
-    const panel = screen.getByRole("dialog", { name: /tabby companion/i });
+    fireEvent.click(screen.getByRole("button", { name: /open sagi companion/i }));
+    const panel = screen.getByRole("dialog", { name: /sagi companion/i });
     // The "live" stat chip shows value 2 next to its label.
     const liveChip = within(panel).getByText("live").closest("div")!;
     expect(within(liveChip).getByText("2")).toBeInTheDocument();
   });
 
   it("respects the enabled preference", () => {
-    localStorage.setItem("agent-dashboard-tabby-enabled", "false");
-    renderTabby();
-    expect(screen.queryByRole("button", { name: /open tabby companion/i })).not.toBeInTheDocument();
+    localStorage.setItem("agent-dashboard-sagi-enabled", "false");
+    renderSagi();
+    expect(screen.queryByRole("button", { name: /open sagi companion/i })).not.toBeInTheDocument();
   });
 
   it("a tap (no movement) still opens the panel", () => {
-    renderTabby();
-    const btn = screen.getByRole("button", { name: /open tabby companion/i });
+    renderSagi();
+    const btn = screen.getByRole("button", { name: /open sagi companion/i });
     act(() => {
       fireEvent.pointerDown(btn, { clientX: 990, clientY: 700, button: 0 });
       fireEvent.pointerUp(btn, { clientX: 990, clientY: 700 });
     });
     fireEvent.click(btn);
-    expect(screen.getByRole("dialog", { name: /tabby companion/i })).toBeInTheDocument();
+    expect(screen.getByRole("dialog", { name: /sagi companion/i })).toBeInTheDocument();
   });
 
   it("dragging snaps to an edge, persists position, and does not open the panel", () => {
-    renderTabby();
-    const btn = screen.getByRole("button", { name: /open tabby companion/i });
+    renderSagi();
+    const btn = screen.getByRole("button", { name: /open sagi companion/i });
     // Default dock is bottom-right. Drag far to the left past the threshold.
     act(() => {
       fireEvent.pointerDown(btn, { clientX: 990, clientY: 700, button: 0 });
@@ -121,29 +121,29 @@ describe("Tabby widget", () => {
     // The synthetic click that follows a drag must be swallowed.
     fireEvent.click(btn);
     expect(screen.queryByRole("dialog")).not.toBeInTheDocument();
-    const saved = JSON.parse(localStorage.getItem("agent-dashboard-tabby-pos") || "{}");
+    const saved = JSON.parse(localStorage.getItem("agent-dashboard-sagi-pos") || "{}");
     expect(saved.side).toBe("left");
     expect(typeof saved.y).toBe("number");
   });
 
   it("a sub-threshold pointer move is treated as a tap, not a drag", () => {
-    renderTabby();
-    const btn = screen.getByRole("button", { name: /open tabby companion/i });
+    renderSagi();
+    const btn = screen.getByRole("button", { name: /open sagi companion/i });
     act(() => {
       fireEvent.pointerDown(btn, { clientX: 990, clientY: 700, button: 0 });
       fireEvent.pointerMove(btn, { clientX: 992, clientY: 701 }); // < 5px threshold
       fireEvent.pointerUp(btn, { clientX: 992, clientY: 701 });
     });
     fireEvent.click(btn);
-    expect(screen.getByRole("dialog", { name: /tabby companion/i })).toBeInTheDocument();
+    expect(screen.getByRole("dialog", { name: /sagi companion/i })).toBeInTheDocument();
     // No position was persisted because no real drag happened.
-    expect(localStorage.getItem("agent-dashboard-tabby-pos")).toBeNull();
+    expect(localStorage.getItem("agent-dashboard-sagi-pos")).toBeNull();
   });
 
   it("restores a persisted left-edge position on mount", () => {
-    localStorage.setItem("agent-dashboard-tabby-pos", JSON.stringify({ side: "left", y: 0.2 }));
-    renderTabby();
-    const btn = screen.getByRole("button", { name: /open tabby companion/i }) as HTMLElement;
+    localStorage.setItem("agent-dashboard-sagi-pos", JSON.stringify({ side: "left", y: 0.2 }));
+    renderSagi();
+    const btn = screen.getByRole("button", { name: /open sagi companion/i }) as HTMLElement;
     // Left-docked → inline left equals the edge margin (16px).
     expect(btn.style.left).toBe("16px");
   });
diff --git a/client/src/components/Tabby/__tests__/brain.test.ts b/client/src/components/Sagi/__tests__/brain.test.ts
similarity index 63%
rename from client/src/components/Tabby/__tests__/brain.test.ts
rename to client/src/components/Sagi/__tests__/brain.test.ts
index d607682..bdfaeb6 100644
--- a/client/src/components/Tabby/__tests__/brain.test.ts
+++ b/client/src/components/Sagi/__tests__/brain.test.ts
@@ -1,13 +1,13 @@
 /**
  * @file brain.test.ts
- * @description Unit tests for the Tabby state brain — initial state, mood transitions driven by dashboard events, and status derivation.
+ * @description Unit tests for the Sagi state brain — initial state, mood transitions driven by dashboard events, and status derivation.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 
 import { describe, it, expect } from "vitest";
 import {
-  initialTabbyState,
-  reduceTabby,
+  initialSagiState,
+  reduceSagi,
   deriveMood,
   statusOf,
   clearErrors,
@@ -16,7 +16,7 @@ import {
   WORRIED_MS,
   STUCK_MS,
   SLEEP_MS,
-  type TabbyState,
+  type SagiState,
 } from "../brain";
 import type {
   WSMessage,
@@ -53,65 +53,65 @@ function runStatusMsg(d: Partial<RunStatusPayload>): WSMessage {
 
 describe("deriveMood priority", () => {
   it("disconnected outranks everything", () => {
-    const s: TabbyState = { ...initialTabbyState(T0), connected: false, worriedUntil: T0 + 9999 };
+    const s: SagiState = { ...initialSagiState(T0), connected: false, worriedUntil: T0 + 9999 };
     expect(deriveMood(s, T0)).toBe("disconnected");
   });
 
   it("worried outranks stuck", () => {
-    let s = initialTabbyState(T0);
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "active"), T0)); // live
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "active"), T0)); // live
     s = { ...s, lastActivityAt: T0 - STUCK_MS - 1, worriedUntil: T0 + 100 };
     expect(deriveMood(s, T0)).toBe("worried");
   });
 
   it("stuck when a live session goes silent past STUCK_MS", () => {
-    let s = initialTabbyState(T0);
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "active"), T0));
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "active"), T0));
     expect(deriveMood(s, T0 + STUCK_MS + 1)).toBe("stuck");
   });
 
   it("happy is transient then falls back to idle when nothing live", () => {
-    let s = initialTabbyState(T0);
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "active"), T0));
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "completed"), T0)); // no longer live
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "active"), T0));
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "completed"), T0)); // no longer live
     expect(deriveMood(s, T0 + 10)).toBe("happy");
     expect(deriveMood(s, T0 + HAPPY_MS + 1)).toBe("idle");
   });
 
   it("thinking shows when set and nothing higher applies", () => {
-    const s = { ...initialTabbyState(T0), thinking: true };
+    const s = { ...initialSagiState(T0), thinking: true };
     expect(deriveMood(s, T0)).toBe("thinking");
   });
 
   it("watching when a session is live and recent", () => {
-    let s = initialTabbyState(T0);
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "active"), T0));
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "active"), T0));
     expect(deriveMood(s, T0 + 1000)).toBe("watching");
   });
 
   it("sleeping after SLEEP_MS of no activity and nothing live", () => {
-    const s = initialTabbyState(T0);
+    const s = initialSagiState(T0);
     expect(deriveMood(s, T0 + SLEEP_MS + 1)).toBe("sleeping");
   });
 
   it("idle by default", () => {
-    expect(deriveMood(initialTabbyState(T0), T0)).toBe("idle");
+    expect(deriveMood(initialSagiState(T0), T0)).toBe("idle");
   });
 });
 
-describe("reduceTabby counts and pulses", () => {
+describe("reduceSagi counts and pulses", () => {
   it("tracks live count accurately across transitions", () => {
-    let s = initialTabbyState(T0);
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "active"), T0));
-    ({ state: s } = reduceTabby(s, sessionMsg("b", "active"), T0));
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "active"), T0));
+    ({ state: s } = reduceSagi(s, sessionMsg("b", "active"), T0));
     expect(statusOf(s).liveCount).toBe(2);
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "completed"), T0));
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "completed"), T0));
     expect(statusOf(s).liveCount).toBe(1);
   });
 
   it("counts errored sessions and emits error pulse", () => {
-    let s = initialTabbyState(T0);
-    const r = reduceTabby(s, sessionMsg("a", "error"), T0);
+    let s = initialSagiState(T0);
+    const r = reduceSagi(s, sessionMsg("a", "error"), T0);
     s = r.state;
     expect(r.pulse).toBe("error");
     expect(statusOf(s).errorCount).toBe(1);
@@ -119,70 +119,70 @@ describe("reduceTabby counts and pulses", () => {
   });
 
   it("session_start pulse only on first active transition", () => {
-    let s = initialTabbyState(T0);
-    const r1 = reduceTabby(s, sessionMsg("a", "active"), T0);
+    let s = initialSagiState(T0);
+    const r1 = reduceSagi(s, sessionMsg("a", "active"), T0);
     expect(r1.pulse).toBe("session_start");
-    const r2 = reduceTabby(r1.state, sessionMsg("a", "active"), T0);
+    const r2 = reduceSagi(r1.state, sessionMsg("a", "active"), T0);
     expect(r2.pulse).toBe(null);
   });
 
   it("session_done pulse only when the session was tracked", () => {
-    let s = initialTabbyState(T0);
-    const untracked = reduceTabby(s, sessionMsg("ghost", "completed"), T0);
+    let s = initialSagiState(T0);
+    const untracked = reduceSagi(s, sessionMsg("ghost", "completed"), T0);
     expect(untracked.pulse).toBe(null);
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "active"), T0));
-    const done = reduceTabby(s, sessionMsg("a", "completed"), T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "active"), T0));
+    const done = reduceSagi(s, sessionMsg("a", "completed"), T0);
     expect(done.pulse).toBe("session_done");
   });
 
   it("agent error triggers worried via pulse", () => {
-    const r = reduceTabby(initialTabbyState(T0), agentMsg("error"), T0);
+    const r = reduceSagi(initialSagiState(T0), agentMsg("error"), T0);
     expect(r.pulse).toBe("error");
     expect(deriveMood(r.state, T0)).toBe("worried");
   });
 
   it("a newly created subagent emits subagent_spawn, a main agent does not", () => {
-    expect(reduceTabby(initialTabbyState(T0), agentCreatedMsg("subagent"), T0).pulse).toBe(
+    expect(reduceSagi(initialSagiState(T0), agentCreatedMsg("subagent"), T0).pulse).toBe(
       "subagent_spawn"
     );
-    expect(reduceTabby(initialTabbyState(T0), agentCreatedMsg("main"), T0).pulse).toBe(null);
+    expect(reduceSagi(initialSagiState(T0), agentCreatedMsg("main"), T0).pulse).toBe(null);
   });
 
   it("waiting transition emits a waiting pulse once and still counts as live", () => {
-    let s = initialTabbyState(T0);
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "active"), T0)); // active
-    const first = reduceTabby(s, waitingMsg("a"), T0);
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "active"), T0)); // active
+    const first = reduceSagi(s, waitingMsg("a"), T0);
     expect(first.pulse).toBe("waiting");
     expect(statusOf(first.state).liveCount).toBe(1);
     // A repeat waiting update does not re-announce.
-    const second = reduceTabby(first.state, waitingMsg("a"), T0);
+    const second = reduceSagi(first.state, waitingMsg("a"), T0);
     expect(second.pulse).toBe(null);
   });
 
   it("failure event types set worried, normal events do not", () => {
-    const fail = reduceTabby(initialTabbyState(T0), eventMsg("toolError"), T0);
+    const fail = reduceSagi(initialSagiState(T0), eventMsg("toolError"), T0);
     expect(fail.pulse).toBe("error");
-    const ok = reduceTabby(initialTabbyState(T0), eventMsg("postToolUse"), T0);
+    const ok = reduceSagi(initialSagiState(T0), eventMsg("postToolUse"), T0);
     expect(ok.pulse).toBe(null);
     expect(ok.state.worriedUntil).toBe(0);
   });
 
   it("run_status updates activity timestamp only (no exit code available)", () => {
-    const running = reduceTabby(initialTabbyState(T0), runStatusMsg({ status: "running" }), T0);
+    const running = reduceSagi(initialSagiState(T0), runStatusMsg({ status: "running" }), T0);
     expect(running.pulse).toBe(null);
-    const gone = reduceTabby(initialTabbyState(T0), runStatusMsg({ status: "gone" }), T0);
+    const gone = reduceSagi(initialSagiState(T0), runStatusMsg({ status: "gone" }), T0);
     expect(gone.pulse).toBe(null);
   });
 
   it("any handled message refreshes lastActivityAt", () => {
-    const s = { ...initialTabbyState(T0), lastActivityAt: T0 - 99999 };
-    const { state } = reduceTabby(s, eventMsg("postToolUse"), T0 + 5);
+    const s = { ...initialSagiState(T0), lastActivityAt: T0 - 99999 };
+    const { state } = reduceSagi(s, eventMsg("postToolUse"), T0 + 5);
     expect(state.lastActivityAt).toBe(T0 + 5);
   });
 
   it("ignores unrelated message types without mutating", () => {
-    const s = initialTabbyState(T0);
-    const r = reduceTabby(s, { type: "import.progress", data: {} as never, timestamp: "x" }, T0);
+    const s = initialSagiState(T0);
+    const r = reduceSagi(s, { type: "import.progress", data: {} as never, timestamp: "x" }, T0);
     expect(r.state).toBe(s);
     expect(r.pulse).toBe(null);
   });
@@ -191,7 +191,7 @@ describe("reduceTabby counts and pulses", () => {
 describe("seedSessions", () => {
   it("hydrates live/waiting/errored counts from a REST snapshot", () => {
     const s = seedSessions(
-      initialTabbyState(T0),
+      initialSagiState(T0),
       [
         { id: "a", status: "active" },
         { id: "b", status: "active", awaiting_input_since: "2026-05-29T00:00:00Z" },
@@ -209,17 +209,17 @@ describe("seedSessions", () => {
 
 describe("statusOf waiting", () => {
   it("counts a waiting session as both live and waiting", () => {
-    let s = initialTabbyState(T0);
-    ({ state: s } = reduceTabby(s, waitingMsg("a"), T0));
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, waitingMsg("a"), T0));
     expect(statusOf(s)).toMatchObject({ liveCount: 1, waitingCount: 1, errorCount: 0 });
   });
 });
 
 describe("clearErrors", () => {
   it("drops errored sessions but keeps active ones", () => {
-    let s = initialTabbyState(T0);
-    ({ state: s } = reduceTabby(s, sessionMsg("a", "active"), T0));
-    ({ state: s } = reduceTabby(s, sessionMsg("b", "error"), T0));
+    let s = initialSagiState(T0);
+    ({ state: s } = reduceSagi(s, sessionMsg("a", "active"), T0));
+    ({ state: s } = reduceSagi(s, sessionMsg("b", "error"), T0));
     s = clearErrors(s);
     expect(statusOf(s).errorCount).toBe(0);
     expect(statusOf(s).liveCount).toBe(1);
diff --git a/client/src/components/Tabby/__tests__/intents.test.ts b/client/src/components/Sagi/__tests__/intents.test.ts
similarity index 91%
rename from client/src/components/Tabby/__tests__/intents.test.ts
rename to client/src/components/Sagi/__tests__/intents.test.ts
index 9923456..c4ebaf4 100644
--- a/client/src/components/Tabby/__tests__/intents.test.ts
+++ b/client/src/components/Sagi/__tests__/intents.test.ts
@@ -1,14 +1,14 @@
 /**
  * @file intents.test.ts
- * @description Unit tests for Tabby's intent matcher — natural-language queries mapped to dashboard navigation and status intents.
+ * @description Unit tests for Sagi's intent matcher — natural-language queries mapped to dashboard navigation and status intents.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 
 import { describe, it, expect } from "vitest";
 import { matchIntent } from "../intents";
-import type { TabbyStatus } from "../brain";
+import type { SagiStatus } from "../brain";
 
-const status = (over: Partial<TabbyStatus> = {}): TabbyStatus => ({
+const status = (over: Partial<SagiStatus> = {}): SagiStatus => ({
   liveCount: 0,
   waitingCount: 0,
   errorCount: 0,
diff --git a/client/src/components/Tabby/__tests__/quips.test.ts b/client/src/components/Sagi/__tests__/quips.test.ts
similarity index 88%
rename from client/src/components/Tabby/__tests__/quips.test.ts
rename to client/src/components/Sagi/__tests__/quips.test.ts
index c460ec0..3bdde73 100644
--- a/client/src/components/Tabby/__tests__/quips.test.ts
+++ b/client/src/components/Sagi/__tests__/quips.test.ts
@@ -1,6 +1,6 @@
 /**
  * @file quips.test.ts
- * @description Unit tests for Tabby's quip picker — full key coverage and stable selection behavior for the speech-bubble lines.
+ * @description Unit tests for Sagi's quip picker — full key coverage and stable selection behavior for the speech-bubble lines.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 
diff --git a/client/src/components/Tabby/brain.ts b/client/src/components/Sagi/brain.ts
similarity index 89%
rename from client/src/components/Tabby/brain.ts
rename to client/src/components/Sagi/brain.ts
index 44a8e9c..626741f 100644
--- a/client/src/components/Tabby/brain.ts
+++ b/client/src/components/Sagi/brain.ts
@@ -1,16 +1,16 @@
 /**
  * @file brain.ts
- * @description Pure, framework-free core of the Tabby companion. Reduces the
+ * @description Pure, framework-free core of the Sagi companion. Reduces the
  *   dashboard's live WebSocket stream into a small mood model and derives the
- *   current cat mood from that model plus the wall clock. Kept side-effect free
+ *   current mood from that model plus the wall clock. Kept side-effect free
  *   so it can be unit-tested without React, timers, or the DOM. The React hook
- *   (`useTabbyBrain`) wires this to the event bus and to real timers.
+ *   (`useSagiBrain`) wires this to the event bus and to real timers.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 /* =============================================================================
  * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
  * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
  *
  * ## Design constraints
  * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
@@ -29,18 +29,18 @@
  *
  * ## Public surface
  * - `Mood` — exported API; see TSDoc on the symbol for behavior.
- * - `TabbyPulse` — exported API; see TSDoc on the symbol for behavior.
- * - `TabbyStatus` — exported API; see TSDoc on the symbol for behavior.
- * - `TabbyState` — exported API; see TSDoc on the symbol for behavior.
+ * - `SagiPulse` — exported API; see TSDoc on the symbol for behavior.
+ * - `SagiStatus` — exported API; see TSDoc on the symbol for behavior.
+ * - `SagiState` — exported API; see TSDoc on the symbol for behavior.
  * - `HAPPY_MS` — exported API; see TSDoc on the symbol for behavior.
  * - `WORRIED_MS` — exported API; see TSDoc on the symbol for behavior.
  * - `STUCK_MS` — exported API; see TSDoc on the symbol for behavior.
  * - `SLEEP_MS` — exported API; see TSDoc on the symbol for behavior.
  * - `FAILURE_EVENT_TYPES` — exported API; see TSDoc on the symbol for behavior.
- * - `initialTabbyState` — exported API; see TSDoc on the symbol for behavior.
+ * - `initialSagiState` — exported API; see TSDoc on the symbol for behavior.
  * - `statusOf` — exported API; see TSDoc on the symbol for behavior.
  * - `deriveMood` — exported API; see TSDoc on the symbol for behavior.
- * - `reduceTabby` — exported API; see TSDoc on the symbol for behavior.
+ * - `reduceSagi` — exported API; see TSDoc on the symbol for behavior.
  * - `seedSessions` — exported API; see TSDoc on the symbol for behavior.
  * - `clearErrors` — exported API; see TSDoc on the symbol for behavior.
  *
@@ -62,17 +62,17 @@
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **TabbyPulse**
+ * **SagiPulse**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **TabbyStatus**
+ * **SagiStatus**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **TabbyState**
+ * **SagiState**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
@@ -102,7 +102,7 @@
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **initialTabbyState**
+ * **initialSagiState**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
@@ -117,7 +117,7 @@
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **reduceTabby**
+ * **reduceSagi**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
@@ -136,7 +136,7 @@
 
 import type { WSMessage, Session, Agent, RunStatusPayload, DashboardEvent } from "../../lib/types";
 
-/** All moods Tabby can express, highest priority first (see `deriveMood`). */
+/** All moods Sagi can express, highest priority first (see `deriveMood`). */
 export type Mood =
   | "disconnected"
   | "worried"
@@ -148,11 +148,11 @@ export type Mood =
   | "idle";
 
 /**
- * A one-shot signal describing what just happened, emitted by `reduceTabby`.
+ * A one-shot signal describing what just happened, emitted by `reduceSagi`.
  * The hook turns pulses into transient speech bubbles. `null` means the message
  * was irrelevant or non-notable.
  */
-export type TabbyPulse =
+export type SagiPulse =
   | "session_done"
   | "session_start"
   | "subagent_spawn"
@@ -161,7 +161,7 @@ export type TabbyPulse =
   | "run_done"
   | null;
 
-export interface TabbyStatus {
+export interface SagiStatus {
   /** Active + waiting sessions (everything not finished/errored). */
   liveCount: number;
   /** Subset of liveCount currently blocked on user input. */
@@ -170,7 +170,7 @@ export interface TabbyStatus {
   connected: boolean;
 }
 
-export interface TabbyState {
+export interface SagiState {
   connected: boolean;
   /** Latest status per session id we still care about. "waiting" = active but
    *  blocked on user input; counts as live for the status line. */
@@ -204,7 +204,7 @@ export const FAILURE_EVENT_TYPES: ReadonlySet<string> = new Set([
   "diagnosticError",
 ]);
 
-export function initialTabbyState(now: number): TabbyState {
+export function initialSagiState(now: number): SagiState {
   return {
     connected: true,
     sessions: {},
@@ -215,7 +215,7 @@ export function initialTabbyState(now: number): TabbyState {
   };
 }
 
-export function statusOf(state: TabbyState): TabbyStatus {
+export function statusOf(state: SagiState): SagiStatus {
   let liveCount = 0;
   let waitingCount = 0;
   let errorCount = 0;
@@ -233,7 +233,7 @@ export function statusOf(state: TabbyState): TabbyStatus {
  * so callers (and tests) control the clock; transient windows (happy/worried)
  * and inactivity windows (stuck/sleeping) are evaluated against it.
  */
-export function deriveMood(state: TabbyState, now: number): Mood {
+export function deriveMood(state: SagiState, now: number): Mood {
   if (!state.connected) return "disconnected";
   if (now < state.worriedUntil) return "worried";
 
@@ -249,22 +249,22 @@ export function deriveMood(state: TabbyState, now: number): Mood {
 }
 
 /**
- * Fold a single WebSocket message into the Tabby state. Returns the next state
+ * Fold a single WebSocket message into the Sagi state. Returns the next state
  * (new object) and a one-shot pulse describing what happened. Unknown or
  * irrelevant message types pass through unchanged with a `null` pulse.
  */
-export function reduceTabby(
-  state: TabbyState,
+export function reduceSagi(
+  state: SagiState,
   msg: WSMessage,
   now: number
-): { state: TabbyState; pulse: TabbyPulse } {
+): { state: SagiState; pulse: SagiPulse } {
   switch (msg.type) {
     case "session_created":
     case "session_updated": {
       const s = msg.data as Session;
       if (!s || !s.id) return { state, pulse: null };
       const sessions = { ...state.sessions };
-      let pulse: TabbyPulse = null;
+      let pulse: SagiPulse = null;
       let happyUntil = state.happyUntil;
       let worriedUntil = state.worriedUntil;
 
@@ -309,7 +309,7 @@ export function reduceTabby(
       }
       // A freshly spawned subagent is worth announcing; the main agent landing
       // is already covered by session_start.
-      const pulse: TabbyPulse = a && a.type === "subagent" ? "subagent_spawn" : null;
+      const pulse: SagiPulse = a && a.type === "subagent" ? "subagent_spawn" : null;
       return { state: { ...state, lastActivityAt: now }, pulse };
     }
 
@@ -361,10 +361,10 @@ export function reduceTabby(
  * never clears the error window. Live WS deltas continue to refine this.
  */
 export function seedSessions(
-  state: TabbyState,
+  state: SagiState,
   rows: ReadonlyArray<{ id: string; status: string; awaiting_input_since?: string | null }>,
   now: number
-): TabbyState {
+): SagiState {
   const sessions = { ...state.sessions };
   for (const r of rows) {
     if (!r || !r.id) continue;
@@ -376,8 +376,8 @@ export function seedSessions(
 }
 
 /** Drop all errored sessions from tracking (used by "clear alerts"). */
-export function clearErrors(state: TabbyState): TabbyState {
-  const sessions: TabbyState["sessions"] = {};
+export function clearErrors(state: SagiState): SagiState {
+  const sessions: SagiState["sessions"] = {};
   for (const [id, s] of Object.entries(state.sessions)) {
     if (s !== "error") sessions[id] = s;
   }
diff --git a/client/src/components/Tabby/intents.ts b/client/src/components/Sagi/intents.ts
similarity index 93%
rename from client/src/components/Tabby/intents.ts
rename to client/src/components/Sagi/intents.ts
index db3d2d1..a047b96 100644
--- a/client/src/components/Tabby/intents.ts
+++ b/client/src/components/Sagi/intents.ts
@@ -1,6 +1,6 @@
 /**
  * @file intents.ts
- * @description Tabby's local "Ask" brain. Matches a free-text question against a
+ * @description Sagi's local "Ask" brain. Matches a free-text question against a
  *   small set of intents answerable from cached dashboard status. Anything it
  *   can't answer becomes a handoff to the Run page (spawn a real `claude`).
  *   Pure function - no network, no DOM - so it's fully unit-testable.
@@ -9,7 +9,7 @@
 /* =============================================================================
  * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
  * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
  *
  * ## Design constraints
  * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
@@ -55,13 +55,13 @@
  *
  * ----------------------------------------------------------------------------- */
 
-import type { TabbyStatus } from "./brain";
+import type { SagiStatus } from "./brain";
 
 export type AskResult = { kind: "answer"; text: string } | { kind: "handoff"; prompt: string };
 
 const plural = (n: number) => (n === 1 ? "" : "s");
 
-export function matchIntent(query: string, status: TabbyStatus): AskResult {
+export function matchIntent(query: string, status: SagiStatus): AskResult {
   const q = query.trim().toLowerCase();
   if (!q) {
     return {
diff --git a/client/src/components/Tabby/prefs.ts b/client/src/components/Sagi/prefs.ts
similarity index 85%
rename from client/src/components/Tabby/prefs.ts
rename to client/src/components/Sagi/prefs.ts
index 54c83c8..b834bba 100644
--- a/client/src/components/Tabby/prefs.ts
+++ b/client/src/components/Sagi/prefs.ts
@@ -1,6 +1,6 @@
 /**
  * @file prefs.ts
- * @description Tiny localStorage-backed preference store for Tabby (enabled +
+ * @description Tiny localStorage-backed preference store for Sagi (enabled +
  *   muted). Broadcasts changes via a window CustomEvent so the Settings toggle
  *   and the live widget stay in sync within the same tab without a reload.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
@@ -8,7 +8,7 @@
 /* =============================================================================
  * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
  * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
  *
  * ## Design constraints
  * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
@@ -23,8 +23,8 @@
  * scoped GET via `?sources=`. Health checks and import history surface in Settings.
  *
  * ## Public surface
- * - `TabbyPos` — exported API; see TSDoc on the symbol for behavior.
- * - `tabbyPrefs` — exported API; see TSDoc on the symbol for behavior.
+ * - `SagiPos` — exported API; see TSDoc on the symbol for behavior.
+ * - `sagiPrefs` — exported API; see TSDoc on the symbol for behavior.
  *
  * ## Testing pointers
  * - Prefer colocated `__tests__` with Vitest + Testing Library for UI.
@@ -39,29 +39,29 @@
 /* -----------------------------------------------------------------------------
  * EXPORT CATALOG — quick index of symbols defined below (documentation only).
  * -----------------------------------------------------------------------------
- * **TabbyPos**
+ * **SagiPos**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **tabbyPrefs**
+ * **sagiPrefs**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
  * ----------------------------------------------------------------------------- */
 
-const ENABLED_KEY = "agent-dashboard-tabby-enabled";
-const MUTED_KEY = "agent-dashboard-tabby-muted";
-const POS_KEY = "agent-dashboard-tabby-pos";
-const EVENT = "tabby:prefs";
+const ENABLED_KEY = "agent-dashboard-sagi-enabled";
+const MUTED_KEY = "agent-dashboard-sagi-muted";
+const POS_KEY = "agent-dashboard-sagi-pos";
+const EVENT = "sagi:prefs";
 
 /**
  * Persisted resting position, AssistiveTouch-style: the widget always docks to
  * the left or right edge, remembering its vertical offset. `y` is stored as a
  * fraction of the viewport height (0–1) so it survives window resizes.
  */
-export interface TabbyPos {
+export interface SagiPos {
   side: "left" | "right";
   y: number;
 }
@@ -88,11 +88,11 @@ function writeBool(key: string, value: boolean): void {
   }
 }
 
-function readPos(): TabbyPos | null {
+function readPos(): SagiPos | null {
   try {
     const raw = localStorage.getItem(POS_KEY);
     if (!raw) return null;
-    const p = JSON.parse(raw) as Partial<TabbyPos>;
+    const p = JSON.parse(raw) as Partial<SagiPos>;
     if ((p.side === "left" || p.side === "right") && typeof p.y === "number") {
       return { side: p.side, y: Math.min(1, Math.max(0, p.y)) };
     }
@@ -102,7 +102,7 @@ function readPos(): TabbyPos | null {
   }
 }
 
-function writePos(pos: TabbyPos): void {
+function writePos(pos: SagiPos): void {
   try {
     localStorage.setItem(POS_KEY, JSON.stringify(pos));
   } catch {
@@ -112,7 +112,7 @@ function writePos(pos: TabbyPos): void {
   // are local to the widget and shouldn't churn the Settings toggle listeners.
 }
 
-export const tabbyPrefs = {
+export const sagiPrefs = {
   getEnabled: () => readBool(ENABLED_KEY, true),
   setEnabled: (v: boolean) => writeBool(ENABLED_KEY, v),
   getMuted: () => readBool(MUTED_KEY, false),
diff --git a/client/src/components/Tabby/quips.ts b/client/src/components/Sagi/quips.ts
similarity index 94%
rename from client/src/components/Tabby/quips.ts
rename to client/src/components/Sagi/quips.ts
index 9905496..7b81f52 100644
--- a/client/src/components/Tabby/quips.ts
+++ b/client/src/components/Sagi/quips.ts
@@ -1,6 +1,6 @@
 /**
  * @file quips.ts
- * @description Tabby's personality: pools of short phrases keyed by pulse/mood,
+ * @description Sagi's personality: pools of short phrases keyed by pulse/mood,
  *   plus a deterministic-by-injection picker. Pure data + a pure function so it
  *   can be unit-tested without randomness leaking in.
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
@@ -8,7 +8,7 @@
 /* =============================================================================
  * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
  * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
  *
  * ## Design constraints
  * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
@@ -60,9 +60,9 @@
  *
  * ----------------------------------------------------------------------------- */
 
-import type { Mood, TabbyPulse } from "./brain";
+import type { Mood, SagiPulse } from "./brain";
 
-export type QuipKey = NonNullable<TabbyPulse> | Mood;
+export type QuipKey = NonNullable<SagiPulse> | Mood;
 
 const QUIPS: Record<QuipKey, string[]> = {
   // Pulses (event-driven, transient bubbles)
diff --git a/client/src/components/Sagi/sagi.css b/client/src/components/Sagi/sagi.css
new file mode 100644
index 0000000..c8fbfc2
--- /dev/null
+++ b/client/src/components/Sagi/sagi.css
@@ -0,0 +1,273 @@
+/**
+ * sagi.css - animations + mood expressions for the Sagi companion.
+ * Colors mirror the app's theme tokens (accent #6366f1/#818cf8, surface scale)
+ * with warm pink accents (ears, cheeks, nose) for cuteness. All continuous
+ * motion is disabled under [data-reduced="1"] and prefers-reduced-motion.
+ * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
+ */
+
+.sagi-avatar {
+  overflow: visible;
+  cursor: pointer;
+  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5));
+}
+
+/* ── palette ── */
+/* The mascot artwork is a flat trace (186 self-colored paths) with no part
+   grouping beyond the eyes, so there is no shared fill/stroke palette to set
+   here - every path carries its own `fill`. Only the extracted eye parts and
+   the new overlay glyphs need rules. */
+.sagi-sparkle path {
+  fill: #fde68a;
+}
+.sagi-zzz text,
+.sagi-bang text {
+  fill: #a5b4fc;
+  font-family: "JetBrains Mono", monospace;
+  font-size: 44px;
+  font-weight: 700;
+}
+
+/* ── default visibility: hide mood-only overlays ── */
+.sagi-zzz,
+.sagi-bang,
+.sagi-sparkle {
+  display: none;
+}
+
+/* ── happy ── */
+.sagi-avatar[data-mood="happy"] .sagi-sparkle {
+  display: block;
+}
+
+/* ── watching ── (alert, tail/ear motion handled below via whole-mascot transform) */
+
+/* ── worried ── (whole-mascot shake handled below) */
+
+/* ── stuck ── (alert bang) */
+.sagi-avatar[data-mood="stuck"] .sagi-bang {
+  display: block;
+}
+
+/* ── thinking ── head tilt handled below */
+
+/* ── sleeping / disconnected ── (eyes shut via static scaleY, no cursor tracking) */
+.sagi-avatar[data-mood="sleeping"] .sagi-eye-blink,
+.sagi-avatar[data-mood="disconnected"] .sagi-eye-blink {
+  transform: scaleY(0.08);
+}
+.sagi-avatar[data-mood="sleeping"] .sagi-zzz {
+  display: block;
+}
+.sagi-avatar[data-mood="disconnected"] {
+  opacity: 0.5;
+  filter: grayscale(0.65) drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5));
+}
+
+/* ── eyes: per-eye blink transform-origin (native mascot.svg coordinates) ── */
+.sagi-eye-left .sagi-eye-blink {
+  transform-origin: 560px 375px;
+}
+.sagi-eye-right .sagi-eye-blink {
+  transform-origin: 823px 375px;
+}
+
+/* ════════ animations ════════ */
+@keyframes sagi-breathe {
+  0%,
+  100% {
+    transform: scale(1);
+  }
+  50% {
+    transform: scale(1.035);
+  }
+}
+@keyframes sagi-blink {
+  0%,
+  92%,
+  100% {
+    transform: scaleY(1);
+  }
+  96% {
+    transform: scaleY(0.1);
+  }
+}
+@keyframes sagi-shake {
+  0%,
+  100% {
+    transform: translateX(0);
+  }
+  25% {
+    transform: translateX(-2px);
+  }
+  75% {
+    transform: translateX(2px);
+  }
+}
+@keyframes sagi-bob {
+  0%,
+  100% {
+    transform: translateY(0);
+  }
+  50% {
+    transform: translateY(-3px);
+  }
+}
+@keyframes sagi-sparkle-twinkle {
+  0%,
+  100% {
+    transform: scale(0.6);
+    opacity: 0.4;
+  }
+  50% {
+    transform: scale(1);
+    opacity: 1;
+  }
+}
+
+/* idle: gentle breathing + occasional blink */
+.sagi-avatar[data-mood="idle"] {
+  animation: sagi-breathe 4s ease-in-out infinite;
+  transform-origin: 640px 720px;
+}
+/* Blink lives on the inner group so it never overrides the outer group's
+   eye-tracking translate (which would freeze the eyes - see the CSS-blink
+   note in SagiAvatar.tsx). */
+.sagi-avatar[data-mood="idle"] .sagi-eye-blink {
+  animation: sagi-blink 5s ease-in-out infinite;
+}
+/* happy: whole-mascot bob + twinkling sparkle */
+.sagi-avatar[data-mood="happy"] {
+  animation: sagi-bob 0.5s ease-in-out 0s 4;
+  transform-origin: 640px 720px;
+}
+.sagi-avatar[data-mood="happy"] .sagi-sparkle {
+  animation: sagi-sparkle-twinkle 0.9s ease-in-out infinite;
+  transform-origin: 1073px 424px;
+}
+/* worried: shake */
+.sagi-avatar[data-mood="worried"] {
+  animation: sagi-shake 0.35s ease-in-out 0s 3;
+  transform-origin: 640px 720px;
+}
+/* stuck: slow breathe */
+.sagi-avatar[data-mood="stuck"] {
+  animation: sagi-breathe 2.4s ease-in-out infinite;
+  transform-origin: 640px 720px;
+}
+/* thinking: subtle head tilt */
+.sagi-avatar[data-mood="thinking"] {
+  transform: rotate(-6deg);
+  transform-origin: 640px 720px;
+}
+/* sleeping: slow breathe, droop */
+.sagi-avatar[data-mood="sleeping"] {
+  animation: sagi-breathe 5s ease-in-out infinite;
+  transform-origin: 640px 720px;
+}
+
+/* ── reduced motion: kill all continuous animation ── */
+.sagi-avatar[data-reduced="1"],
+.sagi-avatar[data-reduced="1"] * {
+  animation: none !important;
+}
+@media (prefers-reduced-motion: reduce) {
+  .sagi-avatar,
+  .sagi-avatar * {
+    animation: none !important;
+  }
+}
+
+/* ════════ shell (avatar button, bubble, panel) ════════ */
+
+/* The draggable avatar. Fixed-positioned; left/top are set inline by the drag
+   hook. It docks to an edge (AssistiveTouch-style) and remembers where. */
+.sagi-avatar-btn {
+  position: fixed;
+  z-index: 41; /* above the flyout */
+  background: transparent;
+  border: none;
+  padding: 0;
+  line-height: 0;
+  border-radius: 9999px;
+  cursor: grab;
+  touch-action: none; /* pointer drives the drag instead of scrolling on touch */
+  /* Glide to the snapped edge after a drag; killed mid-drag for 1:1 tracking. */
+  transition:
+    left 0.28s cubic-bezier(0.22, 1, 0.36, 1),
+    top 0.28s cubic-bezier(0.22, 1, 0.36, 1),
+    transform 0.15s ease;
+}
+.sagi-avatar-btn:hover {
+  transform: scale(1.06);
+}
+.sagi-avatar-btn:focus-visible {
+  outline: 2px solid #818cf8;
+  outline-offset: 3px;
+}
+.sagi-avatar-btn[data-dragging="1"] {
+  cursor: grabbing;
+  transition: transform 0.15s ease; /* no left/top easing while dragging */
+}
+.sagi-avatar-btn[data-dragging="1"]:hover {
+  transform: scale(1.1);
+}
+
+/* Self-clamping flyout that holds the bubble / panel next to the avatar. Its
+   left/top are computed and set inline by SagiFlyout so it never crops. */
+.sagi-flyout {
+  position: fixed;
+  z-index: 40;
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+}
+.sagi-avatar-btn:focus-visible {
+  outline: 2px solid #818cf8;
+  outline-offset: 3px;
+}
+.sagi-error-dot {
+  position: absolute;
+  top: 2px;
+  right: 2px;
+  width: 14px;
+  height: 14px;
+  border-radius: 9999px;
+  background: #ef4444;
+  color: #fff;
+  font-size: 9px;
+  font-weight: 700;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border: 2px solid #0c0c14;
+}
+.sagi-bubble {
+  max-width: 16rem;
+  background: #1a1a28;
+  border: 1px solid #363650;
+  color: #e8e8f0;
+  font-size: 0.8125rem;
+  line-height: 1.2rem;
+  padding: 0.5rem 0.75rem;
+  border-radius: 0.75rem;
+  border-bottom-right-radius: 0.25rem;
+  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
+}
+.sagi-bubble-enter {
+  animation: sagi-bubble-in 0.22s ease-out;
+}
+@keyframes sagi-bubble-in {
+  from {
+    opacity: 0;
+    transform: translateY(6px) scale(0.96);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0) scale(1);
+  }
+}
+.sagi-avatar[data-reduced="1"] ~ * .sagi-bubble-enter,
+.sagi-bubble.sagi-no-anim {
+  animation: none;
+}
diff --git a/client/src/components/Tabby/useTabbyBrain.ts b/client/src/components/Sagi/useSagiBrain.ts
similarity index 85%
rename from client/src/components/Tabby/useTabbyBrain.ts
rename to client/src/components/Sagi/useSagiBrain.ts
index d1f7672..a4c1a14 100644
--- a/client/src/components/Tabby/useTabbyBrain.ts
+++ b/client/src/components/Sagi/useSagiBrain.ts
@@ -1,6 +1,6 @@
 /**
- * @file useTabbyBrain.ts
- * @description React hook that wires the pure Tabby brain to the live event bus
+ * @file useSagiBrain.ts
+ * @description React hook that wires the pure Sagi brain to the live event bus
  *   and to real timers. It is the only unit that subscribes to `eventBus`. It
  *   exposes the derived mood, a status summary, the current speech bubble, and
  *   imperative controls (mute, clear alerts, set thinking) for the UI shell.
@@ -9,7 +9,7 @@
 /* =============================================================================
  * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
  * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome. React hook: isolates side effects and subscription wiring so presentational components stay declarative.
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome. React hook: isolates side effects and subscription wiring so presentational components stay declarative.
  *
  * ## Design constraints
  * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
@@ -32,8 +32,8 @@
  * - `./prefs`
  *
  * ## Public surface
- * - `TabbyBrain` — exported API; see TSDoc on the symbol for behavior.
- * - `useTabbyBrain` — exported API; see TSDoc on the symbol for behavior.
+ * - `SagiBrain` — exported API; see TSDoc on the symbol for behavior.
+ * - `useSagiBrain` — exported API; see TSDoc on the symbol for behavior.
  *
  * ## Testing pointers
  * - Prefer colocated `__tests__` with Vitest + Testing Library for UI.
@@ -48,12 +48,12 @@
 /* -----------------------------------------------------------------------------
  * EXPORT CATALOG — quick index of symbols defined below (documentation only).
  * -----------------------------------------------------------------------------
- * **TabbyBrain**
+ * **SagiBrain**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **useTabbyBrain**
+ * **useSagiBrain**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
@@ -65,26 +65,26 @@ import { eventBus } from "../../lib/eventBus";
 import { api } from "../../lib/api";
 import type { WSMessage } from "../../lib/types";
 import {
-  initialTabbyState,
-  reduceTabby,
+  initialSagiState,
+  reduceSagi,
   deriveMood,
   statusOf,
   clearErrors,
   seedSessions,
   type Mood,
-  type TabbyState,
-  type TabbyStatus,
+  type SagiState,
+  type SagiStatus,
 } from "./brain";
 import { pickQuip } from "./quips";
-import { tabbyPrefs } from "./prefs";
+import { sagiPrefs } from "./prefs";
 
 const BUBBLE_MS = 4500;
 // Minimum gap between non-error bubbles, so a burst of activity doesn't spam.
 const BUBBLE_THROTTLE_MS = 3000;
 
-export interface TabbyBrain {
+export interface SagiBrain {
   mood: Mood;
-  status: TabbyStatus;
+  status: SagiStatus;
   bubble: string | null;
   dismissBubble: () => void;
   muted: boolean;
@@ -93,18 +93,18 @@ export interface TabbyBrain {
   setThinking: (v: boolean) => void;
 }
 
-export function useTabbyBrain(): TabbyBrain {
+export function useSagiBrain(): SagiBrain {
   const now0 = Date.now();
   // Start optimistically connected (idle, open eyes) so the cursor-tracking
   // eyes are live from the first frame instead of after the WebSocket finishes
   // its initial handshake. onConnection below corrects this if it's truly down.
-  const [state, setState] = useState<TabbyState>(() => ({
-    ...initialTabbyState(now0),
+  const [state, setState] = useState<SagiState>(() => ({
+    ...initialSagiState(now0),
     connected: true,
   }));
   const [tick, setTick] = useState(now0);
   const [bubble, setBubble] = useState<string | null>(null);
-  const [muted, setMuted] = useState<boolean>(() => tabbyPrefs.getMuted());
+  const [muted, setMuted] = useState<boolean>(() => sagiPrefs.getMuted());
 
   const bubbleTimer = useRef<ReturnType<typeof setTimeout>>();
   const lastBubbleAt = useRef(0);
@@ -112,7 +112,7 @@ export function useTabbyBrain(): TabbyBrain {
   mutedRef.current = muted;
 
   // Keep mute in sync with the Settings page / other tabs.
-  useEffect(() => tabbyPrefs.subscribe(() => setMuted(tabbyPrefs.getMuted())), []);
+  useEffect(() => sagiPrefs.subscribe(() => setMuted(sagiPrefs.getMuted())), []);
 
   const showBubble = useCallback((text: string, force: boolean) => {
     if (!text) return;
@@ -148,7 +148,7 @@ export function useTabbyBrain(): TabbyBrain {
     const unsubMsg = eventBus.subscribe((msg: WSMessage) => {
       const t = Date.now();
       setState((prev) => {
-        const { state: next, pulse } = reduceTabby(prev, msg, t);
+        const { state: next, pulse } = reduceSagi(prev, msg, t);
         if (pulse) showBubble(pickQuip(pulse), pulse === "error");
         return next;
       });
@@ -181,7 +181,7 @@ export function useTabbyBrain(): TabbyBrain {
 
   const toggleMute = useCallback(() => {
     const next = !mutedRef.current;
-    tabbyPrefs.setMuted(next);
+    sagiPrefs.setMuted(next);
     setMuted(next);
     if (next) dismissBubble();
   }, [dismissBubble]);
diff --git a/client/src/components/Tabby/useTabbyPosition.ts b/client/src/components/Sagi/useSagiPosition.ts
similarity index 77%
rename from client/src/components/Tabby/useTabbyPosition.ts
rename to client/src/components/Sagi/useSagiPosition.ts
index 8986772..53b5213 100644
--- a/client/src/components/Tabby/useTabbyPosition.ts
+++ b/client/src/components/Sagi/useSagiPosition.ts
@@ -1,6 +1,6 @@
 /**
- * @file useTabbyPosition.ts
- * @description AssistiveTouch-style draggable docking for the Tabby avatar. The
+ * @file useSagiPosition.ts
+ * @description AssistiveTouch-style draggable docking for the Sagi avatar. The
  *   avatar follows the pointer 1:1 while dragging (via Pointer Capture, so it
  *   keeps tracking even if the cursor outruns it), and on release snaps to the
  *   nearest left/right edge, remembering its vertical offset (persisted as a
@@ -11,7 +11,7 @@
 /* =============================================================================
  * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
  * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome. React hook: isolates side effects and subscription wiring so presentational components stay declarative.
+ * **Purpose:** Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome. React hook: isolates side effects and subscription wiring so presentational components stay declarative.
  *
  * ## Design constraints
  * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
@@ -29,10 +29,10 @@
  * - `./prefs`
  *
  * ## Public surface
- * - `TABBY_SIZE` — exported API; see TSDoc on the symbol for behavior.
- * - `TABBY_MARGIN` — exported API; see TSDoc on the symbol for behavior.
- * - `TabbyPlacement` — exported API; see TSDoc on the symbol for behavior.
- * - `useTabbyPosition` — exported API; see TSDoc on the symbol for behavior.
+ * - `SAGI_SIZE` — exported API; see TSDoc on the symbol for behavior.
+ * - `SAGI_MARGIN` — exported API; see TSDoc on the symbol for behavior.
+ * - `SagiPlacement` — exported API; see TSDoc on the symbol for behavior.
+ * - `useSagiPosition` — exported API; see TSDoc on the symbol for behavior.
  *
  * ## Testing pointers
  * - Prefer colocated `__tests__` with Vitest + Testing Library for UI.
@@ -47,22 +47,22 @@
 /* -----------------------------------------------------------------------------
  * EXPORT CATALOG — quick index of symbols defined below (documentation only).
  * -----------------------------------------------------------------------------
- * **TABBY_SIZE**
+ * **SAGI_SIZE**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **TABBY_MARGIN**
+ * **SAGI_MARGIN**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **TabbyPlacement**
+ * **SagiPlacement**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
  *
- * **useTabbyPosition**
+ * **useSagiPosition**
  *   Part of this module's public contract. Downstream imports should treat
  *   the signature and return type as stable unless release notes say otherwise.
  *   When behavior changes, update the `@file` overview and relevant tests.
@@ -70,30 +70,30 @@
  * ----------------------------------------------------------------------------- */
 
 import { useCallback, useEffect, useRef, useState } from "react";
-import { tabbyPrefs, type TabbyPos } from "./prefs";
+import { sagiPrefs, type SagiPos } from "./prefs";
 import type { PointerEvent as ReactPointerEvent } from "react";
 
-// Avatar footprint + edge gap, in px. SIZE matches CatAvatar's default size.
-export const TABBY_SIZE = 60;
-export const TABBY_MARGIN = 16;
+// Avatar footprint + edge gap, in px. SIZE matches SagiAvatar's default size.
+export const SAGI_SIZE = 60;
+export const SAGI_MARGIN = 16;
 const DRAG_THRESHOLD = 5;
 
 const vw = () => (typeof window !== "undefined" ? window.innerWidth : 1024);
 const vh = () => (typeof window !== "undefined" ? window.innerHeight : 768);
 
-function defaultPos(): TabbyPos {
+function defaultPos(): SagiPos {
   return { side: "right", y: 0.5 }; // right edge, vertically centered
 }
 
 /** Resting top-left screen coords for a docked position. */
-function restingScreen(pos: TabbyPos) {
-  const avail = Math.max(0, vh() - TABBY_SIZE - 2 * TABBY_MARGIN);
-  const left = pos.side === "left" ? TABBY_MARGIN : vw() - TABBY_SIZE - TABBY_MARGIN;
-  const top = TABBY_MARGIN + pos.y * avail;
+function restingScreen(pos: SagiPos) {
+  const avail = Math.max(0, vh() - SAGI_SIZE - 2 * SAGI_MARGIN);
+  const left = pos.side === "left" ? SAGI_MARGIN : vw() - SAGI_SIZE - SAGI_MARGIN;
+  const top = SAGI_MARGIN + pos.y * avail;
   return { left, top };
 }
 
-export interface TabbyPlacement {
+export interface SagiPlacement {
   /** Avatar top-left, in screen px. */
   left: number;
   top: number;
@@ -109,8 +109,8 @@ export interface TabbyPlacement {
   consumeDrag: () => boolean;
 }
 
-export function useTabbyPosition(): TabbyPlacement {
-  const [pos, setPos] = useState<TabbyPos>(() => tabbyPrefs.getPos() ?? defaultPos());
+export function useSagiPosition(): SagiPlacement {
+  const [pos, setPos] = useState<SagiPos>(() => sagiPrefs.getPos() ?? defaultPos());
   const [drag, setDrag] = useState<{ left: number; top: number } | null>(null);
   const [, force] = useState(0); // re-derive resting coords on resize
 
@@ -154,11 +154,8 @@ export function useTabbyPosition(): TabbyPlacement {
     const dy = e.clientY - start.py;
     if (!movedRef.current && Math.hypot(dx, dy) < DRAG_THRESHOLD) return;
     movedRef.current = true;
-    const left = Math.min(
-      vw() - TABBY_SIZE - TABBY_MARGIN,
-      Math.max(TABBY_MARGIN, start.left + dx)
-    );
-    const top = Math.min(vh() - TABBY_SIZE - TABBY_MARGIN, Math.max(TABBY_MARGIN, start.top + dy));
+    const left = Math.min(vw() - SAGI_SIZE - SAGI_MARGIN, Math.max(SAGI_MARGIN, start.left + dx));
+    const top = Math.min(vh() - SAGI_SIZE - SAGI_MARGIN, Math.max(SAGI_MARGIN, start.top + dy));
     liveRef.current = { left, top };
     setDrag({ left, top });
   }, []);
@@ -172,11 +169,11 @@ export function useTabbyPosition(): TabbyPlacement {
     const live = liveRef.current;
     if (live) {
       draggedRef.current = true;
-      const side: "left" | "right" = live.left + TABBY_SIZE / 2 < vw() / 2 ? "left" : "right";
-      const avail = Math.max(1, vh() - TABBY_SIZE - 2 * TABBY_MARGIN);
-      const y = Math.min(1, Math.max(0, (live.top - TABBY_MARGIN) / avail));
-      const next: TabbyPos = { side, y };
-      tabbyPrefs.setPos(next);
+      const side: "left" | "right" = live.left + SAGI_SIZE / 2 < vw() / 2 ? "left" : "right";
+      const avail = Math.max(1, vh() - SAGI_SIZE - 2 * SAGI_MARGIN);
+      const y = Math.min(1, Math.max(0, (live.top - SAGI_MARGIN) / avail));
+      const next: SagiPos = { side, y };
+      sagiPrefs.setPos(next);
       setPos(next);
       setDrag(null); // leave drag mode; resting coords (with transition) take over
     }
@@ -194,9 +191,9 @@ export function useTabbyPosition(): TabbyPlacement {
   return {
     left: screen.left,
     top: screen.top,
-    size: TABBY_SIZE,
+    size: SAGI_SIZE,
     side: pos.side,
-    openUp: screen.top + TABBY_SIZE / 2 > vh() / 2,
+    openUp: screen.top + SAGI_SIZE / 2 > vh() / 2,
     dragging: drag !== null,
     onPointerDown,
     onPointerMove,
diff --git a/client/src/components/Tabby/CatAvatar.tsx b/client/src/components/Tabby/CatAvatar.tsx
deleted file mode 100644
index 7c1802f..0000000
--- a/client/src/components/Tabby/CatAvatar.tsx
+++ /dev/null
@@ -1,290 +0,0 @@
-/**
- * @file CatAvatar.tsx
- * @description Pure presentational SVG cat - Tabby. Given a mood it renders the
- *   matching expression (ears, eyes, cheeks, mouth, tail, paws) via a `data-mood`
- *   attribute that drives the CSS in tabby.css. When motion is allowed, the
- *   pupils track the cursor. No data access - fully testable / reusable in
- *   isolation. Geometry tuned for max cuteness: big round head, oversized
- *   sparkly eyes, pink ear-insides + cheek blush, classic tabby forehead
- *   stripes, a fluffy tail, and little paws peeking at the bottom.
- * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
- */
-/* =============================================================================
- * MODULE_GUIDE — extended in-file reference (comments only; safe to read, never executed)
- * =============================================================================
- * **Purpose:** Tabby is the optional on-screen cat assistant — quips, intents, and lightweight event reactions layered above the dashboard chrome.
- *
- * ## Design constraints
- * - Local-first: no telemetry leaves the machine unless the user configures webhooks.
- * - Fail-safe hooks path on the server must never block Claude Code; UI mirrors that
- *   philosophy by degrading gracefully (empty states, stale badges, reconnect loops).
- * - Destructive flows stay behind explicit confirmation modals and server-side gates.
- * - Internationalization: user-visible strings belong in i18n JSON, not literals here.
- *
- * ## Remote data & SSH
- * Remote Data Sources let operators aggregate multiple machines. SSH entries describe
- * how to reach a peer dashboard; the global data scope (`dataScope.ts`) narrows every
- * scoped GET via `?sources=`. Health checks and import history surface in Settings.
- *
- * ## Internal dependencies
- * - `./brain`
- *
- * ## Public surface
- * - `CatAvatar` — exported API; see TSDoc on the symbol for behavior.
- *
- * ## Testing pointers
- * - Prefer colocated `__tests__` with Vitest + Testing Library for UI.
- * - Server contract changes require `npm run test:server` and OpenAPI sync.
- * - MCP edits: `npm run mcp:typecheck` and `npm run mcp:build`.
- *
- * ## Related docs
- * - `ARCHITECTURE.md` — hooks → API → SQLite → WebSocket → UI pipeline.
- * - `docs/API.md` — REST reference.
- * - `.claude/skills/file-headers/` — mandatory `@author` header policy.
- * ============================================================================= */
-/* -----------------------------------------------------------------------------
- * EXPORT CATALOG — quick index of symbols defined below (documentation only).
- * -----------------------------------------------------------------------------
- * **CatAvatar**
- *   Part of this module's public contract. Downstream imports should treat
- *   the signature and return type as stable unless release notes say otherwise.
- *   When behavior changes, update the `@file` overview and relevant tests.
- *
- * ----------------------------------------------------------------------------- */
-
-import { useEffect, useRef, useState } from "react";
-import type { Mood } from "./brain";
-
-interface CatAvatarProps {
-  mood: Mood;
-  reducedMotion: boolean;
-  size?: number;
-}
-
-const MAX_PUPIL_SHIFT = 2.8; // px in the 100x100 viewBox
-
-// Module-level last-known cursor position, tracked from the moment this module
-// first loads (well before any avatar mounts). This is what makes eye tracking
-// feel *immediate*: as soon as the cat mounts it aims at wherever the cursor
-// already is, instead of sitting centered until the next mousemove. `null`
-// until the very first pointer event of the page's life.
-let lastCursor: { x: number; y: number } | null = null;
-if (typeof window !== "undefined") {
-  const remember = (e: MouseEvent) => {
-    lastCursor = { x: e.clientX, y: e.clientY };
-  };
-  // capture phase + passive so we never interfere with anything else.
-  window.addEventListener("mousemove", remember, { capture: true, passive: true });
-  window.addEventListener("pointermove", remember as EventListener, {
-    capture: true,
-    passive: true,
-  });
-}
-
-export function CatAvatar({ mood, reducedMotion, size = 60 }: CatAvatarProps) {
-  const rootRef = useRef<SVGSVGElement | null>(null);
-  const rafRef = useRef<number>();
-  const [pupil, setPupil] = useState({ x: 0, y: 0 });
-
-  // Pupils follow the cursor whenever motion is allowed and the eyes are open.
-  // (Only `sleeping` closes them by intent; `disconnected` hides the open-eye
-  // group via CSS, so tracking there is harmless and keeps eyes pre-aimed for
-  // the instant the connection returns.)
-  const tracking = !reducedMotion && mood !== "sleeping";
-
-  useEffect(() => {
-    if (!tracking) {
-      setPupil({ x: 0, y: 0 });
-      return;
-    }
-
-    const aimAt = (clientX: number, clientY: number) => {
-      const el = rootRef.current;
-      if (!el) return;
-      const r = el.getBoundingClientRect();
-      const cx = r.left + r.width / 2;
-      const cy = r.top + r.height / 2;
-      const dx = clientX - cx;
-      const dy = clientY - cy;
-      const dist = Math.hypot(dx, dy) || 1;
-      // Normalize then clamp to the eye socket range.
-      const nx = (dx / dist) * Math.min(1, dist / 240);
-      const ny = (dy / dist) * Math.min(1, dist / 240);
-      setPupil({ x: nx * MAX_PUPIL_SHIFT, y: ny * MAX_PUPIL_SHIFT });
-    };
-
-    // Immediately aim at the last-known cursor (next frame, so layout is ready)
-    // - no waiting for the user to move the mouse first.
-    let initRaf = 0;
-    if (lastCursor) {
-      const c = lastCursor;
-      initRaf = requestAnimationFrame(() => aimAt(c.x, c.y));
-    }
-
-    const onMove = (e: MouseEvent) => {
-      if (rafRef.current) return;
-      rafRef.current = requestAnimationFrame(() => {
-        rafRef.current = undefined;
-        aimAt(e.clientX, e.clientY);
-      });
-    };
-    window.addEventListener("mousemove", onMove, { passive: true });
-    return () => {
-      window.removeEventListener("mousemove", onMove);
-      if (initRaf) cancelAnimationFrame(initRaf);
-      if (rafRef.current) cancelAnimationFrame(rafRef.current);
-      rafRef.current = undefined;
-    };
-  }, [tracking]);
-
-  return (
-    <svg
-      ref={rootRef}
-      className="tabby-cat"
-      data-mood={mood}
-      data-reduced={reducedMotion ? "1" : "0"}
-      width={size}
-      height={size}
-      viewBox="0 0 100 100"
-      role="img"
-      aria-label={`Tabby (${mood})`}
-    >
-      <defs>
-        {/* Soft top-lit gradient for the body/head - gives a rounded, plush feel. */}
-        <radialGradient id="tabbyFur" cx="50%" cy="34%" r="72%">
-          <stop offset="0%" stopColor="#5b5b86" />
-          <stop offset="60%" stopColor="#43436a" />
-          <stop offset="100%" stopColor="#343352" />
-        </radialGradient>
-        <linearGradient id="tabbyHalo" x1="0" y1="0" x2="0" y2="1">
-          <stop offset="0%" stopColor="#a5b4fc" />
-          <stop offset="100%" stopColor="#6366f1" />
-        </linearGradient>
-      </defs>
-
-      {/* soft glow halo */}
-      <circle className="tabby-halo" cx="50" cy="56" r="33" />
-
-      {/* tail - fluffy curl to the right */}
-      <path
-        className="tabby-tail"
-        d="M78 74 q24 4 19 -22 q-3 -14 -12 -11 q8 4 6 14 q-3 12 -16 9 z"
-      />
-
-      {/* body / chest peeking up from the bottom */}
-      <ellipse className="tabby-body" cx="50" cy="92" rx="27" ry="18" />
-
-      {/* paws */}
-      <g className="tabby-paws">
-        <ellipse className="tabby-paw" cx="38" cy="98" rx="8" ry="6" />
-        <ellipse className="tabby-paw" cx="62" cy="98" rx="8" ry="6" />
-        <path className="tabby-toe" d="M35 96 v4 M38 96.5 v4 M41 96 v4" />
-        <path className="tabby-toe" d="M59 96 v4 M62 96.5 v4 M65 96 v4" />
-      </g>
-
-      {/* ears - rounded, with pink inner */}
-      <g className="tabby-ears">
-        <path className="tabby-ear" d="M30 33 Q20 8 44 24 Q38 28 34 33 Z" />
-        <path className="tabby-ear-inner" d="M31 30 Q26 16 39 25 Q35 27 33 30 Z" />
-        <path className="tabby-ear" d="M70 33 Q80 8 56 24 Q62 28 66 33 Z" />
-        <path className="tabby-ear-inner" d="M69 30 Q74 16 61 25 Q65 27 67 30 Z" />
-      </g>
-
-      {/* head - big and round */}
-      <ellipse className="tabby-head" cx="50" cy="49" rx="33" ry="30" />
-
-      {/* classic tabby forehead stripes */}
-      <g className="tabby-stripes">
-        <path d="M50 22 L50 31" />
-        <path d="M43 24 L45 32" />
-        <path d="M57 24 L55 32" />
-      </g>
-
-      {/* cheek blush */}
-      <g className="tabby-cheeks">
-        <ellipse cx="26" cy="57" rx="6.5" ry="4" />
-        <ellipse cx="74" cy="57" rx="6.5" ry="4" />
-      </g>
-
-      {/* eyes - open state (big + sparkly) */}
-      <g className="tabby-eyes-open">
-        <ellipse className="tabby-eye" cx="37" cy="50" rx="9.5" ry="11.5" />
-        <ellipse className="tabby-eye" cx="63" cy="50" rx="9.5" ry="11.5" />
-        {/* Outer group carries the eye-tracking translate; the inner group
-            carries the blink (scaleY) animation. They MUST be separate
-            elements - a CSS animation on `transform` overrides an inline
-            `transform`, so putting both on one node makes the blink clobber
-            the tracking (the original "eyes only track after a while" bug). */}
-        <g className="tabby-pupils" style={{ transform: `translate(${pupil.x}px, ${pupil.y}px)` }}>
-          <g className="tabby-pupils-blink">
-            <circle className="tabby-pupil" cx="37" cy="51" r="5.4" />
-            <circle className="tabby-pupil" cx="63" cy="51" r="5.4" />
-            <circle className="tabby-glint" cx="39.4" cy="48" r="2.1" />
-            <circle className="tabby-glint" cx="65.4" cy="48" r="2.1" />
-            <circle className="tabby-glint tabby-glint-sm" cx="34.8" cy="53" r="1.1" />
-            <circle className="tabby-glint tabby-glint-sm" cx="60.8" cy="53" r="1.1" />
-          </g>
-        </g>
-      </g>
-
-      {/* eyes - happy (^ ^) */}
-      <g className="tabby-eyes-happy">
-        <path d="M29 52 q8 -10 16 0" />
-        <path d="M55 52 q8 -10 16 0" />
-      </g>
-
-      {/* eyes - closed (sleeping / offline) */}
-      <g className="tabby-eyes-closed">
-        <path d="M29 51 q8 7 16 0" />
-        <path d="M55 51 q8 7 16 0" />
-      </g>
-
-      {/* worried brows */}
-      <g className="tabby-brows">
-        <path d="M29 39 L45 45" />
-        <path d="M71 39 L55 45" />
-      </g>
-
-      {/* nose - tiny heart */}
-      <path
-        className="tabby-nose"
-        d="M50 64 C47 60 43 62 45 65 C46 67 50 69 50 69 C50 69 54 67 55 65 C57 62 53 60 50 64 Z"
-      />
-
-      {/* mouths */}
-      <path className="tabby-mouth-idle" d="M50 67 q-4 4 -8 1 M50 67 q4 4 8 1" />
-      <path className="tabby-mouth-happy" d="M42 66 q8 7 16 0" />
-      <path className="tabby-mouth-worried" d="M44 71 q6 -5 12 0" />
-
-      {/* whiskers */}
-      <g className="tabby-whiskers">
-        <path d="M14 55 Q24 55 33 58" />
-        <path d="M13 62 Q24 63 33 63" />
-        <path d="M86 55 Q76 55 67 58" />
-        <path d="M87 62 Q76 63 67 63" />
-      </g>
-
-      {/* zzz for sleeping */}
-      <g className="tabby-zzz">
-        <text x="76" y="28">
-          z
-        </text>
-        <text x="84" y="19">
-          z
-        </text>
-      </g>
-
-      {/* alert bang for stuck */}
-      <g className="tabby-bang">
-        <text x="80" y="28">
-          !
-        </text>
-      </g>
-
-      {/* sparkle for happy */}
-      <g className="tabby-sparkle">
-        <path d="M82 40 l1.4 3.6 l3.6 1.4 l-3.6 1.4 l-1.4 3.6 l-1.4 -3.6 l-3.6 -1.4 l3.6 -1.4 z" />
-      </g>
-    </svg>
-  );
-}
diff --git a/client/src/components/Tabby/tabby.css b/client/src/components/Tabby/tabby.css
deleted file mode 100644
index 092917d..0000000
--- a/client/src/components/Tabby/tabby.css
+++ /dev/null
@@ -1,412 +0,0 @@
-/**
- * tabby.css - animations + mood expressions for the Tabby companion.
- * Colors mirror the app's theme tokens (accent #6366f1/#818cf8, surface scale)
- * with warm pink accents (ears, cheeks, nose) for cuteness. All continuous
- * motion is disabled under [data-reduced="1"] and prefers-reduced-motion.
- * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
- */
-
-.tabby-cat {
-  overflow: visible;
-  cursor: pointer;
-  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5));
-}
-
-/* ── palette ── */
-.tabby-head,
-.tabby-body {
-  fill: url(#tabbyFur);
-  stroke: #8b93f9;
-  stroke-width: 2;
-}
-.tabby-ear {
-  fill: url(#tabbyFur);
-  stroke: #8b93f9;
-  stroke-width: 2;
-  stroke-linejoin: round;
-}
-.tabby-ear-inner {
-  fill: #f7a8c8;
-}
-.tabby-paw {
-  fill: #4a4a72;
-  stroke: #8b93f9;
-  stroke-width: 1.5;
-}
-.tabby-toe {
-  fill: none;
-  stroke: #2c2c46;
-  stroke-width: 1.2;
-  stroke-linecap: round;
-  opacity: 0.7;
-}
-.tabby-stripes path {
-  fill: none;
-  stroke: #8b93f9;
-  stroke-width: 2;
-  stroke-linecap: round;
-  opacity: 0.55;
-}
-.tabby-cheeks ellipse {
-  fill: #f7849f;
-  opacity: 0.5;
-}
-.tabby-eye {
-  fill: #f3f4ff;
-}
-.tabby-pupil {
-  fill: #15131f;
-}
-.tabby-glint {
-  fill: #ffffff;
-  opacity: 0.95;
-}
-.tabby-glint-sm {
-  opacity: 0.75;
-}
-.tabby-nose {
-  fill: #f7849f;
-}
-.tabby-tail {
-  fill: url(#tabbyFur);
-  stroke: #8b93f9;
-  stroke-width: 2;
-  stroke-linejoin: round;
-  transform-origin: 80px 68px;
-}
-.tabby-whiskers path,
-.tabby-brows path,
-.tabby-eyes-happy path,
-.tabby-eyes-closed path,
-.tabby-mouth-idle,
-.tabby-mouth-happy,
-.tabby-mouth-worried {
-  fill: none;
-  stroke: #dfe1ff;
-  stroke-width: 2.2;
-  stroke-linecap: round;
-}
-.tabby-whiskers path {
-  stroke: #9aa0c8;
-  stroke-width: 1.4;
-  opacity: 0.8;
-}
-.tabby-brows path {
-  stroke: #8b93f9;
-}
-.tabby-halo {
-  fill: url(#tabbyHalo);
-  opacity: 0.18;
-}
-.tabby-sparkle path {
-  fill: #fde68a;
-}
-.tabby-zzz text,
-.tabby-bang text {
-  fill: #a5b4fc;
-  font-family: "JetBrains Mono", monospace;
-  font-size: 11px;
-  font-weight: 700;
-}
-
-/* ── default visibility: show open eyes + idle mouth, hide the rest ── */
-.tabby-eyes-happy,
-.tabby-eyes-closed,
-.tabby-brows,
-.tabby-mouth-happy,
-.tabby-mouth-worried,
-.tabby-zzz,
-.tabby-bang,
-.tabby-sparkle {
-  display: none;
-}
-
-/* ── happy ── */
-.tabby-cat[data-mood="happy"] .tabby-eyes-open {
-  display: none;
-}
-.tabby-cat[data-mood="happy"] .tabby-eyes-happy,
-.tabby-cat[data-mood="happy"] .tabby-mouth-happy,
-.tabby-cat[data-mood="happy"] .tabby-sparkle {
-  display: block;
-}
-.tabby-cat[data-mood="happy"] .tabby-mouth-idle {
-  display: none;
-}
-
-/* ── watching ── (alert, smiling, tail flick) */
-.tabby-cat[data-mood="watching"] .tabby-mouth-idle {
-  display: none;
-}
-.tabby-cat[data-mood="watching"] .tabby-mouth-happy {
-  display: block;
-}
-
-/* ── worried ── (brows down, frown) */
-.tabby-cat[data-mood="worried"] .tabby-brows,
-.tabby-cat[data-mood="worried"] .tabby-mouth-worried {
-  display: block;
-}
-.tabby-cat[data-mood="worried"] .tabby-mouth-idle {
-  display: none;
-}
-.tabby-cat[data-mood="worried"] .tabby-cheeks ellipse {
-  opacity: 0.7;
-}
-
-/* ── stuck ── (alert bang, ears up) */
-.tabby-cat[data-mood="stuck"] .tabby-bang {
-  display: block;
-}
-
-/* ── thinking ── keeps open eyes + idle mouth; head tilt handled below */
-
-/* ── sleeping / disconnected ── (closed eyes) */
-.tabby-cat[data-mood="sleeping"] .tabby-eyes-open,
-.tabby-cat[data-mood="disconnected"] .tabby-eyes-open {
-  display: none;
-}
-.tabby-cat[data-mood="sleeping"] .tabby-eyes-closed,
-.tabby-cat[data-mood="disconnected"] .tabby-eyes-closed {
-  display: block;
-}
-.tabby-cat[data-mood="sleeping"] .tabby-zzz {
-  display: block;
-}
-.tabby-cat[data-mood="disconnected"] {
-  opacity: 0.5;
-  filter: grayscale(0.65) drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5));
-}
-
-/* ════════ animations ════════ */
-@keyframes tabby-breathe {
-  0%,
-  100% {
-    transform: scale(1);
-  }
-  50% {
-    transform: scale(1.035);
-  }
-}
-@keyframes tabby-blink {
-  0%,
-  92%,
-  100% {
-    transform: scaleY(1);
-  }
-  96% {
-    transform: scaleY(0.1);
-  }
-}
-@keyframes tabby-shake {
-  0%,
-  100% {
-    transform: translateX(0);
-  }
-  25% {
-    transform: translateX(-2px);
-  }
-  75% {
-    transform: translateX(2px);
-  }
-}
-@keyframes tabby-bob {
-  0%,
-  100% {
-    transform: translateY(0);
-  }
-  50% {
-    transform: translateY(-3px);
-  }
-}
-@keyframes tabby-tail-flick {
-  0%,
-  100% {
-    transform: rotate(0deg);
-  }
-  50% {
-    transform: rotate(-12deg);
-  }
-}
-@keyframes tabby-ears-perk {
-  0%,
-  100% {
-    transform: translateY(0);
-  }
-  50% {
-    transform: translateY(-1.5px);
-  }
-}
-@keyframes tabby-sparkle-twinkle {
-  0%,
-  100% {
-    transform: scale(0.6);
-    opacity: 0.4;
-  }
-  50% {
-    transform: scale(1);
-    opacity: 1;
-  }
-}
-
-/* idle: gentle breathing + occasional blink */
-.tabby-cat[data-mood="idle"] {
-  animation: tabby-breathe 4s ease-in-out infinite;
-  transform-origin: 50px 60px;
-}
-/* Blink lives on the inner group so it never overrides the outer group's
-   eye-tracking translate (which would freeze the eyes - see CatAvatar). */
-.tabby-cat[data-mood="idle"] .tabby-pupils-blink {
-  animation: tabby-blink 5s ease-in-out infinite;
-  transform-origin: 50px 50px;
-}
-/* watching: tail flicks, ears perk */
-.tabby-cat[data-mood="watching"] .tabby-tail {
-  animation: tabby-tail-flick 1.8s ease-in-out infinite;
-}
-.tabby-cat[data-mood="watching"] .tabby-ears {
-  animation: tabby-ears-perk 1.8s ease-in-out infinite;
-  transform-origin: 50px 24px;
-}
-/* happy: head bob + twinkling sparkle */
-.tabby-cat[data-mood="happy"] {
-  animation: tabby-bob 0.5s ease-in-out 0s 4;
-  transform-origin: 50px 60px;
-}
-.tabby-cat[data-mood="happy"] .tabby-sparkle {
-  animation: tabby-sparkle-twinkle 0.9s ease-in-out infinite;
-  transform-origin: 84px 45px;
-}
-/* worried: shake + puff (halo grows) */
-.tabby-cat[data-mood="worried"] {
-  animation: tabby-shake 0.35s ease-in-out 0s 3;
-  transform-origin: 50px 60px;
-}
-.tabby-cat[data-mood="worried"] .tabby-halo {
-  opacity: 0.32;
-}
-/* stuck: ears stay perked, slow breathe */
-.tabby-cat[data-mood="stuck"] {
-  animation: tabby-breathe 2.4s ease-in-out infinite;
-  transform-origin: 50px 60px;
-}
-.tabby-cat[data-mood="stuck"] .tabby-ears {
-  transform: translateY(-2px);
-  transform-origin: 50px 24px;
-}
-/* thinking: subtle head tilt */
-.tabby-cat[data-mood="thinking"] {
-  transform: rotate(-6deg);
-  transform-origin: 50px 60px;
-}
-/* sleeping: slow breathe, droop */
-.tabby-cat[data-mood="sleeping"] {
-  animation: tabby-breathe 5s ease-in-out infinite;
-  transform-origin: 50px 60px;
-}
-
-/* ── reduced motion: kill all continuous animation ── */
-.tabby-cat[data-reduced="1"],
-.tabby-cat[data-reduced="1"] * {
-  animation: none !important;
-}
-@media (prefers-reduced-motion: reduce) {
-  .tabby-cat,
-  .tabby-cat * {
-    animation: none !important;
-  }
-}
-
-/* ════════ shell (avatar button, bubble, panel) ════════ */
-
-/* The draggable avatar. Fixed-positioned; left/top are set inline by the drag
-   hook. It docks to an edge (AssistiveTouch-style) and remembers where. */
-.tabby-avatar-btn {
-  position: fixed;
-  z-index: 41; /* above the flyout */
-  background: transparent;
-  border: none;
-  padding: 0;
-  line-height: 0;
-  border-radius: 9999px;
-  cursor: grab;
-  touch-action: none; /* pointer drives the drag instead of scrolling on touch */
-  /* Glide to the snapped edge after a drag; killed mid-drag for 1:1 tracking. */
-  transition:
-    left 0.28s cubic-bezier(0.22, 1, 0.36, 1),
-    top 0.28s cubic-bezier(0.22, 1, 0.36, 1),
-    transform 0.15s ease;
-}
-.tabby-avatar-btn:hover {
-  transform: scale(1.06);
-}
-.tabby-avatar-btn:focus-visible {
-  outline: 2px solid #818cf8;
-  outline-offset: 3px;
-}
-.tabby-avatar-btn[data-dragging="1"] {
-  cursor: grabbing;
-  transition: transform 0.15s ease; /* no left/top easing while dragging */
-}
-.tabby-avatar-btn[data-dragging="1"]:hover {
-  transform: scale(1.1);
-}
-
-/* Self-clamping flyout that holds the bubble / panel next to the avatar. Its
-   left/top are computed and set inline by TabbyFlyout so it never crops. */
-.tabby-flyout {
-  position: fixed;
-  z-index: 40;
-  display: flex;
-  flex-direction: column;
-  gap: 0.5rem;
-}
-.tabby-avatar-btn:focus-visible {
-  outline: 2px solid #818cf8;
-  outline-offset: 3px;
-}
-.tabby-error-dot {
-  position: absolute;
-  top: 2px;
-  right: 2px;
-  width: 14px;
-  height: 14px;
-  border-radius: 9999px;
-  background: #ef4444;
-  color: #fff;
-  font-size: 9px;
-  font-weight: 700;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  border: 2px solid #0c0c14;
-}
-.tabby-bubble {
-  max-width: 16rem;
-  background: #1a1a28;
-  border: 1px solid #363650;
-  color: #e8e8f0;
-  font-size: 0.8125rem;
-  line-height: 1.2rem;
-  padding: 0.5rem 0.75rem;
-  border-radius: 0.75rem;
-  border-bottom-right-radius: 0.25rem;
-  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
-}
-.tabby-bubble-enter {
-  animation: tabby-bubble-in 0.22s ease-out;
-}
-@keyframes tabby-bubble-in {
-  from {
-    opacity: 0;
-    transform: translateY(6px) scale(0.96);
-  }
-  to {
-    opacity: 1;
-    transform: translateY(0) scale(1);
-  }
-}
-.tabby-cat[data-reduced="1"] ~ * .tabby-bubble-enter,
-.tabby-bubble.tabby-no-anim {
-  animation: none;
-}
diff --git a/client/src/hooks/useWebSocket.ts b/client/src/hooks/useWebSocket.ts
index a3f0001..aebd239 100644
--- a/client/src/hooks/useWebSocket.ts
+++ b/client/src/hooks/useWebSocket.ts
@@ -166,7 +166,7 @@ export function useWebSocket(onMessage: MessageHandler) {
   // back: tab refocus, regained network, or page becoming visible again. This
   // cancels any pending backoff timer and resets the attempt counter so we
   // don't sit out a long delay - e.g. after the dashboard server restarts, the
-  // socket (and the Tabby eyes) recover the moment you look at the tab.
+  // socket (and the Sagi eyes) recover the moment you look at the tab.
   useEffect(() => {
     const reconnectNow = () => {
       if (!mountedRef.current) return;
diff --git a/client/src/i18n/locales/en/settings.json b/client/src/i18n/locales/en/settings.json
index 0dd5533..1aa27d9 100644
--- a/client/src/i18n/locales/en/settings.json
+++ b/client/src/i18n/locales/en/settings.json
@@ -4,10 +4,10 @@
   "exportData": "Export Data",
   "acrossSessions": "Across all tracked sessions",
   "basedOnUsage": "Based on per-model token usage",
-  "tabby": {
-    "title": "Tabby companion",
-    "description": "A floating cat that reacts to your live sessions.",
-    "enable": "Show Tabby",
+  "sagi": {
+    "title": "Sagi companion",
+    "description": "A floating mascot that reacts to your live sessions.",
+    "enable": "Show Sagi",
     "enableDesc": "Display the corner companion across the dashboard (⌘B to open)"
   },
   "pricing": {
diff --git a/client/src/i18n/locales/vi/settings.json b/client/src/i18n/locales/vi/settings.json
index 4e773b6..6a25b60 100644
--- a/client/src/i18n/locales/vi/settings.json
+++ b/client/src/i18n/locales/vi/settings.json
@@ -4,10 +4,10 @@
   "exportData": "Xuất dữ liệu",
   "acrossSessions": "Trên toàn bộ phiên đang được theo dõi",
   "basedOnUsage": "Dựa trên mức dùng token theo mô hình",
-  "tabby": {
-    "title": "Bạn đồng hành Tabby",
-    "description": "Chú mèo nổi phản ứng với các phiên trực tiếp của bạn.",
-    "enable": "Hiện Tabby",
+  "sagi": {
+    "title": "Bạn đồng hành Sagi",
+    "description": "Linh vật nổi phản ứng với các phiên trực tiếp của bạn.",
+    "enable": "Hiện Sagi",
     "enableDesc": "Hiển thị bạn đồng hành ở góc trên toàn bảng điều khiển (⌘B để mở)"
   },
   "pricing": {
diff --git a/client/src/pages/Settings.tsx b/client/src/pages/Settings.tsx
index 350ff86..4d5dc41 100644
--- a/client/src/pages/Settings.tsx
+++ b/client/src/pages/Settings.tsx
@@ -23,7 +23,7 @@
  * ## Internal dependencies
  * - `../lib/api`
  * - `../lib/eventBus`
- * - `../components/Tabby/prefs`
+ * - `../components/Sagi/prefs`
  * - `../lib/format`
  * - `../lib/push`
  * - `../components/Tip`
@@ -98,7 +98,7 @@ import {
   Settings as SettingsIcon,
   FolderOpen,
   Info,
-  Cat,
+  PiggyBank,
   History,
   ChevronLeft,
   ChevronRight,
@@ -107,7 +107,7 @@ import {
 import { api } from "../lib/api";
 import { eventBus } from "../lib/eventBus";
 import { isRemoteDataRefreshMessage } from "../lib/remoteDataEvents";
-import { tabbyPrefs } from "../components/Tabby/prefs";
+import { sagiPrefs } from "../components/Sagi/prefs";
 import { fmt, fmtCost, getCurrentLocale } from "../lib/format";
 import { subscribeToPush, unsubscribeFromPush } from "../lib/push";
 import { Tip } from "../components/Tip";
@@ -136,7 +136,7 @@ const SETTINGS_SECTIONS: {
     fallback: "Remote Data Sources",
     Icon: Cloud,
   },
-  { id: "tabby", labelKey: "tabby.title", fallback: "Tabby", Icon: Cat },
+  { id: "sagi", labelKey: "sagi.title", fallback: "Sagi", Icon: PiggyBank },
   { id: "notifications", labelKey: "notifications.title", Icon: Bell },
   { id: "alerts", labelKey: "alertsHub.title", Icon: BellRing },
   { id: "data", labelKey: "data.title", Icon: Database },
@@ -457,10 +457,10 @@ export function Settings() {
   } | null>(null);
   const [confirmAction, setConfirmAction] = useState<string | null>(null);
   const [notifPrefs, setNotifPrefs] = useState<NotifPrefs>(loadNotifPrefs);
-  const [tabbyEnabled, setTabbyEnabled] = useState(() => tabbyPrefs.getEnabled());
-  const setTabby = useCallback((v: boolean) => {
-    tabbyPrefs.setEnabled(v);
-    setTabbyEnabled(v);
+  const [sagiEnabled, setSagiEnabled] = useState(() => sagiPrefs.getEnabled());
+  const setSagi = useCallback((v: boolean) => {
+    sagiPrefs.setEnabled(v);
+    setSagiEnabled(v);
   }, []);
   const [abandonHours, setAbandonHours] = useState("24");
   const [purgeDays, setPurgeDays] = useState("90");
@@ -1466,37 +1466,37 @@ export function Settings() {
         <RemoteSources />
       </section>
 
-      {/* ─── TABBY COMPANION ─── */}
-      <section id="tabby" className="scroll-mt-24">
+      {/* ─── SAGI COMPANION ─── */}
+      <section id="sagi" className="scroll-mt-24">
         <h3 className="text-sm font-medium text-fg-secondary flex items-center gap-2 mb-1">
           <span className="text-base leading-none" aria-hidden>
-            🐾
+            🦸
           </span>
-          {t("tabby.title", "Tabby companion")}
+          {t("sagi.title", "Sagi companion")}
         </h3>
         <p className="text-xs text-fg-muted mb-4">
-          {t("tabby.description", "A floating cat that reacts to your live sessions.")}
+          {t("sagi.description", "A floating mascot that reacts to your live sessions.")}
         </p>
 
         <div className="card p-5">
           <div className="flex items-center gap-3">
             <div
               className={`w-10 h-10 rounded-xl flex items-center justify-center transition-colors ${
-                tabbyEnabled
+                sagiEnabled
                   ? "bg-blue-600/10 border border-blue-600/20"
                   : "bg-surface-2 border border-border"
               }`}
             >
               <span className="text-lg leading-none" aria-hidden>
-                🐾
+                🦸
               </span>
             </div>
             <Toggle
-              checked={tabbyEnabled}
-              onChange={setTabby}
-              label={t("tabby.enable", "Show Tabby")}
+              checked={sagiEnabled}
+              onChange={setSagi}
+              label={t("sagi.enable", "Show Sagi")}
               description={t(
-                "tabby.enableDesc",
+                "sagi.enableDesc",
                 "Display the corner companion across the dashboard (⌘B to open)"
               )}
             />
diff --git a/client/src/pages/__tests__/__snapshots__/screens.snapshot.test.tsx.snap b/client/src/pages/__tests__/__snapshots__/screens.snapshot.test.tsx.snap
index f3d275a..3ddc84b 100644
--- a/client/src/pages/__tests__/__snapshots__/screens.snapshot.test.tsx.snap
+++ b/client/src/pages/__tests__/__snapshots__/screens.snapshot.test.tsx.snap
@@ -7641,7 +7641,7 @@ exports[`screen snapshots > Settings 1`] = `
           type="button"
         >
           <svg
-            class="lucide lucide-cat w-3.5 h-3.5"
+            class="lucide lucide-piggy-bank w-3.5 h-3.5"
             fill="none"
             height="24"
             stroke="currentColor"
@@ -7653,19 +7653,16 @@ exports[`screen snapshots > Settings 1`] = `
             xmlns="http://www.w3.org/2000/svg"
           >
             <path
-              d="M12 5c.67 0 1.35.09 2 .26 1.78-2 5.03-2.84 6.42-2.26 1.4.58-.42 7-.42 7 .57 1.07 1 2.24 1 3.44C21 17.9 16.97 21 12 21s-9-3-9-7.56c0-1.25.5-2.4 1-3.44 0 0-1.89-6.42-.5-7 1.39-.58 4.72.23 6.5 2.23A9.04 9.04 0 0 1 12 5Z"
+              d="M19 5c-1.5 0-2.8 1.4-3 2-3.5-1.5-11-.3-11 5 0 1.8 0 3 2 4.5V20h4v-2h3v2h4v-4c1-.5 1.7-1 2-2h2v-4h-2c0-1-.5-1.5-1-2V5z"
             />
             <path
-              d="M8 14v.5"
+              d="M2 9v1c0 1.1.9 2 2 2h1"
             />
             <path
-              d="M16 14v.5"
-            />
-            <path
-              d="M11.25 16.25h1.5L12 17l-.75-.75Z"
+              d="M16 11h.01"
             />
           </svg>
-          Tabby companion
+          Sagi companion
         </button>
         <button
           class="inline-flex items-center gap-1.5 text-xs whitespace-nowrap px-2.5 py-1.5 rounded-lg border transition-colors flex-shrink-0 border-border text-fg-secondary hover:text-fg-primary hover:bg-surface-3"
@@ -9245,7 +9242,7 @@ exports[`screen snapshots > Settings 1`] = `
     </section>
     <section
       class="scroll-mt-24"
-      id="tabby"
+      id="sagi"
     >
       <h3
         class="text-sm font-medium text-fg-secondary flex items-center gap-2 mb-1"
@@ -9254,14 +9251,14 @@ exports[`screen snapshots > Settings 1`] = `
           aria-hidden="true"
           class="text-base leading-none"
         >
-          🐾
+          🦸
         </span>
-        Tabby companion
+        Sagi companion
       </h3>
       <p
         class="text-xs text-fg-muted mb-4"
       >
-        A floating cat that reacts to your live sessions.
+        A floating mascot that reacts to your live sessions.
       </p>
       <div
         class="card p-5"
@@ -9276,7 +9273,7 @@ exports[`screen snapshots > Settings 1`] = `
               aria-hidden="true"
               class="text-lg leading-none"
             >
-              🐾
+              🦸
             </span>
           </div>
           <label
@@ -9288,7 +9285,7 @@ exports[`screen snapshots > Settings 1`] = `
               <p
                 class="text-sm text-fg-secondary group-hover:text-fg-secondary transition-colors"
               >
-                Show Tabby
+                Show Sagi
               </p>
               <p
                 class="text-xs text-fg-muted mt-0.5"
diff --git a/scripts/expand-ts-module-docs.py b/scripts/expand-ts-module-docs.py
index b281345..549e504 100644
--- a/scripts/expand-ts-module-docs.py
+++ b/scripts/expand-ts-module-docs.py
@@ -73,9 +73,9 @@ def topic_blurb(path: Path) -> str:
             "Renders Claude transcript rows (user, assistant, tool calls) inside Session "
             "Detail with markdown, syntax highlighting, and TUI-style segments."
         )
-    if "Tabby" in rel:
+    if "Sagi" in rel:
         hints.append(
-            "Tabby is the optional on-screen cat assistant — quips, intents, and lightweight "
+            "Sagi is the optional on-screen mascot assistant — quips, intents, and lightweight "
             "event reactions layered above the dashboard chrome."
         )
     if "hook" in rel.lower() or name.startswith("use"):