diff --git a/docs/pr-evidence/pr-1256/character-magic-rewrite.png b/docs/pr-evidence/pr-1256/character-magic-rewrite.png
new file mode 100644
index 000000000..0d2d85e9b
Binary files /dev/null and b/docs/pr-evidence/pr-1256/character-magic-rewrite.png differ
diff --git a/docs/pr-evidence/pr-1256/lorebook-magic-rewrite.png b/docs/pr-evidence/pr-1256/lorebook-magic-rewrite.png
new file mode 100644
index 000000000..92233e9cf
Binary files /dev/null and b/docs/pr-evidence/pr-1256/lorebook-magic-rewrite.png differ
diff --git a/packages/client/src/components/lorebooks/LorebookFormFields.tsx b/packages/client/src/components/lorebooks/LorebookFormFields.tsx
index 4453bdc78..b1c89bef8 100644
--- a/packages/client/src/components/lorebooks/LorebookFormFields.tsx
+++ b/packages/client/src/components/lorebooks/LorebookFormFields.tsx
@@ -4,10 +4,11 @@
 // and LorebookEntryRow (the per-entry inline drawer).
 // Extracted from LorebookEditor.tsx so styling stays consistent.
 // ──────────────────────────────────────────────
-import { useEffect, useRef, useState, type KeyboardEvent as ReactKeyboardEvent } from "react";
-import { FileText, Maximize2, ToggleLeft, ToggleRight, X } from "lucide-react";
+import { useCallback, useEffect, useRef, useState, type KeyboardEvent as ReactKeyboardEvent } from "react";
+import { FileText, Maximize2, Sparkles, ToggleLeft, ToggleRight, X } from "lucide-react";
 import { cn } from "../../lib/utils";
 import { HelpTooltip } from "../ui/HelpTooltip";
+import { MagicRewritePanel } from "../ui/MagicRewritePanel";
 
 export function FieldGroup({
   label,
@@ -233,6 +234,8 @@ export function ExpandedContentModal({
   placeholder?: string;
 }) {
   const [local, setLocal] = useState(value);
+  const [magicRewriteMode, setMagicRewriteMode] = useState(false);
+  const [magicRewriteResult, setMagicRewriteResult] = useState("");
   const textareaRef = useRef<HTMLTextAreaElement>(null);
 
   useEffect(() => {
@@ -241,7 +244,7 @@ export function ExpandedContentModal({
 
   useEffect(() => {
     const handler = (e: KeyboardEvent) => {
-      if (e.key === "Escape") {
+      if (e.key === "Escape" && !magicRewriteMode) {
         onChange(local);
         onCommit?.();
         onClose();
@@ -249,7 +252,7 @@ export function ExpandedContentModal({
     };
     document.addEventListener("keydown", handler);
     return () => document.removeEventListener("keydown", handler);
-  }, [onClose, onChange, onCommit, local]);
+  }, [onClose, onChange, onCommit, local, magicRewriteMode]);
 
   const handleClose = () => {
     onChange(local);
@@ -257,36 +260,87 @@ export function ExpandedContentModal({
     onClose();
   };
 
+  const handleMagicRewriteBack = () => {
+    setMagicRewriteMode(false);
+    setMagicRewriteResult("");
+  };
+
+  const handleMagicRewriteApply = () => {
+    if (!magicRewriteResult) return;
+    setLocal(magicRewriteResult);
+    setMagicRewriteMode(false);
+    setMagicRewriteResult("");
+    window.setTimeout(() => textareaRef.current?.focus(), 100);
+  };
+
+  const handleMagicRewriteResultChange = useCallback((next: string) => {
+    setMagicRewriteResult(next);
+  }, []);
+
   return (
     <div className="fixed inset-0 z-50 flex items-center justify-center p-6 max-md:pt-[max(1.5rem,env(safe-area-inset-top))]">
       <div className="absolute inset-0 bg-black/60 backdrop-blur-sm" onClick={handleClose} />
-      <div className="relative flex h-[80vh] w-full max-w-3xl flex-col rounded-2xl border border-[var(--border)] bg-[var(--card)] shadow-2xl shadow-black/50">
+      <div className="relative flex h-[80vh] w-full max-w-5xl flex-col rounded-2xl border border-[var(--border)] bg-[var(--card)] shadow-2xl shadow-black/50">
         <div className="flex items-center justify-between border-b border-[var(--border)] px-4 py-3">
-          <h3 className="text-sm font-semibold">{title}</h3>
-          <button onClick={handleClose} className="rounded-lg p-1.5 hover:bg-[var(--accent)]">
-            <X size="1rem" />
-          </button>
+          <h3 className="text-sm font-semibold">{magicRewriteMode ? "✨ Magic Rewrite" : title}</h3>
+          <div className="flex items-center gap-2">
+            <button onClick={handleClose} className="rounded-lg p-1.5 hover:bg-[var(--accent)]">
+              <X size="1rem" />
+            </button>
+          </div>
         </div>
         <div className="flex-1 overflow-hidden p-4">
-          <textarea
-            ref={textareaRef}
-            value={local}
-            onChange={(e) => setLocal(e.target.value)}
-            onKeyDown={(e) => handleTextareaTabKeyDown(e, local, setLocal)}
-            className="h-full w-full resize-none rounded-lg bg-[var(--secondary)] p-4 text-sm text-[var(--foreground)] ring-1 ring-[var(--border)] placeholder:text-[var(--muted-foreground)] focus:outline-none focus:ring-2 focus:ring-[var(--ring)]"
-            placeholder={placeholder}
-          />
+          {magicRewriteMode ? (
+            <MagicRewritePanel value={local} onResultChange={handleMagicRewriteResultChange} />
+          ) : (
+            <textarea
+              ref={textareaRef}
+              value={local}
+              onChange={(e) => setLocal(e.target.value)}
+              onKeyDown={(e) => handleTextareaTabKeyDown(e, local, setLocal)}
+              className="h-full w-full resize-none rounded-lg bg-[var(--secondary)] p-4 text-sm text-[var(--foreground)] ring-1 ring-[var(--border)] placeholder:text-[var(--muted-foreground)] focus:outline-none focus:ring-2 focus:ring-[var(--ring)]"
+              placeholder={placeholder}
+            />
+          )}
         </div>
         <div className="flex items-center justify-between border-t border-[var(--border)] px-4 py-2.5">
           <p className="text-[0.625rem] text-[var(--muted-foreground)]">
-            Changes auto-save on close. Press Escape to close.
+            {magicRewriteMode ? "Back returns to the editor without applying. Apply moves the preview into the editor." : "Changes auto-save on close. Press Escape to close."}
           </p>
-          <button
-            onClick={handleClose}
-            className="rounded-xl bg-gradient-to-r from-amber-400 to-orange-500 px-4 py-1.5 text-xs font-medium text-white shadow-md hover:shadow-lg active:scale-[0.98]"
-          >
-            Done
-          </button>
+          {magicRewriteMode ? (
+            <div className="flex items-center gap-2">
+              <button
+                onClick={handleMagicRewriteBack}
+                className="rounded-xl border border-[var(--border)] px-4 py-1.5 text-xs font-medium text-[var(--foreground)] hover:bg-[var(--accent)] active:scale-[0.98]"
+              >
+                Back
+              </button>
+              <button
+                onClick={handleMagicRewriteApply}
+                disabled={!magicRewriteResult}
+                className="rounded-xl bg-gradient-to-r from-violet-500 to-fuchsia-500 px-4 py-1.5 text-xs font-medium text-white shadow-md hover:shadow-lg active:scale-[0.98] disabled:cursor-not-allowed disabled:opacity-40"
+              >
+                Apply
+              </button>
+            </div>
+          ) : (
+            <div className="flex items-center gap-2">
+              <button
+                onClick={() => setMagicRewriteMode(true)}
+                className="inline-flex items-center gap-1.5 rounded-lg border border-violet-400/30 bg-violet-500/10 px-3 py-1.5 text-xs font-medium text-violet-200 hover:bg-violet-500/20"
+                title="Open Magic Rewrite"
+              >
+                <Sparkles size="0.875rem" />
+                Rewrite
+              </button>
+              <button
+                onClick={handleClose}
+                className="rounded-xl bg-gradient-to-r from-amber-400 to-orange-500 px-4 py-1.5 text-xs font-medium text-white shadow-md hover:shadow-lg active:scale-[0.98]"
+              >
+                Done
+              </button>
+            </div>
+          )}
         </div>
       </div>
     </div>
diff --git a/packages/client/src/components/ui/ExpandedTextarea.tsx b/packages/client/src/components/ui/ExpandedTextarea.tsx
index 7a0de2151..28a32719e 100644
--- a/packages/client/src/components/ui/ExpandedTextarea.tsx
+++ b/packages/client/src/components/ui/ExpandedTextarea.tsx
@@ -1,10 +1,11 @@
 // ──────────────────────────────────────────────
 // Expanded Textarea — Fullscreen editing overlay
 // ──────────────────────────────────────────────
-import { useEffect, useRef } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import { createPortal } from "react-dom";
 import { motion, AnimatePresence } from "framer-motion";
-import { Minimize2 } from "lucide-react";
+import { Minimize2, Sparkles } from "lucide-react";
+import { MagicRewritePanel } from "./MagicRewritePanel";
 
 interface ExpandedTextareaProps {
   open: boolean;
@@ -17,22 +18,57 @@ interface ExpandedTextareaProps {
 
 export function ExpandedTextarea({ open, onClose, title, value, onChange, placeholder }: ExpandedTextareaProps) {
   const textareaRef = useRef<HTMLTextAreaElement>(null);
+  const [local, setLocal] = useState(value);
+  const [magicRewriteMode, setMagicRewriteMode] = useState(false);
+  const [magicRewriteResult, setMagicRewriteResult] = useState("");
+
+  // Sync parent value into local when prop changes; reset rewrite state on close
+  useEffect(() => {
+    if (!open) {
+      setMagicRewriteMode(false);
+      setMagicRewriteResult("");
+    }
+    setLocal(value);
+  }, [value, open]);
 
   useEffect(() => {
     if (!open) return;
     const handler = (e: KeyboardEvent) => {
-      if (e.key === "Escape") onClose();
+      if (e.key === "Escape" && !magicRewriteMode) onClose();
     };
     document.addEventListener("keydown", handler);
     return () => document.removeEventListener("keydown", handler);
-  }, [open, onClose]);
+  }, [open, onClose, magicRewriteMode]);
 
   // Focus textarea when opened
   useEffect(() => {
-    if (open) {
+    if (open && !magicRewriteMode) {
       requestAnimationFrame(() => textareaRef.current?.focus());
     }
-  }, [open]);
+  }, [open, magicRewriteMode]);
+
+  const handleClose = () => {
+    onChange(local);
+    onClose();
+  };
+
+  const handleMagicRewriteResultChange = useCallback((next: string) => {
+    setMagicRewriteResult(next);
+  }, []);
+
+  const handleMagicRewriteApply = () => {
+    if (!magicRewriteResult) return;
+    setLocal(magicRewriteResult);
+    setMagicRewriteMode(false);
+    setMagicRewriteResult("");
+    onChange(magicRewriteResult);
+    requestAnimationFrame(() => textareaRef.current?.focus());
+  };
+
+  const handleMagicRewriteBack = () => {
+    setMagicRewriteMode(false);
+    setMagicRewriteResult("");
+  };
 
   return createPortal(
     <AnimatePresence>
@@ -46,11 +82,38 @@ export function ExpandedTextarea({ open, onClose, title, value, onChange, placeh
         >
           {/* Header */}
           <div className="flex shrink-0 items-center justify-between border-b border-[var(--border)] px-5 py-3">
-            <h2 className="text-sm font-semibold">{title}</h2>
+            <h2 className="text-sm font-semibold">{magicRewriteMode ? "✨ Magic Rewrite" : title}</h2>
             <div className="flex items-center gap-2">
-              <span className="text-[0.625rem] text-[var(--muted-foreground)]">{value.length} characters</span>
+              {!magicRewriteMode && (
+                <button
+                  onClick={() => setMagicRewriteMode(true)}
+                  className="flex items-center gap-1.5 rounded-lg border border-violet-400/30 bg-violet-500/10 px-2.5 py-1.5 text-xs font-medium text-violet-200 hover:bg-violet-500/20"
+                  title="Open Magic Rewrite"
+                >
+                  <Sparkles size="0.875rem" />
+                  Rewrite
+                </button>
+              )}
+              {magicRewriteMode && (
+                <button
+                  onClick={handleMagicRewriteBack}
+                  className="flex items-center gap-1.5 rounded-lg border border-[var(--border)] px-2.5 py-1.5 text-xs font-medium text-[var(--foreground)] hover:bg-[var(--accent)]"
+                >
+                  Back
+                </button>
+              )}
+              {magicRewriteMode && (
+                <button
+                  onClick={handleMagicRewriteApply}
+                  disabled={!magicRewriteResult}
+                  className="rounded-xl bg-gradient-to-r from-violet-500 to-fuchsia-500 px-3 py-1.5 text-xs font-medium text-white disabled:cursor-not-allowed disabled:opacity-40"
+                >
+                  Apply
+                </button>
+              )}
+              <span className="text-[0.625rem] text-[var(--muted-foreground)]">{local.length} characters</span>
               <button
-                onClick={onClose}
+                onClick={handleClose}
                 className="flex items-center gap-1.5 rounded-lg px-2.5 py-1.5 text-xs text-[var(--muted-foreground)] transition-colors hover:bg-[var(--accent)] hover:text-[var(--foreground)]"
               >
                 <Minimize2 size="0.875rem" />
@@ -59,15 +122,19 @@ export function ExpandedTextarea({ open, onClose, title, value, onChange, placeh
             </div>
           </div>
 
-          {/* Textarea */}
+          {/* Content */}
           <div className="flex-1 overflow-hidden p-4 md:p-6">
-            <textarea
-              ref={textareaRef}
-              value={value}
-              onChange={(e) => onChange(e.target.value)}
-              placeholder={placeholder}
-              className="h-full w-full resize-none rounded-xl border border-[var(--border)] bg-[var(--secondary)] p-5 text-sm leading-relaxed outline-none transition-colors placeholder:text-[var(--muted-foreground)]/40 focus:border-[var(--primary)]/40 focus:ring-1 focus:ring-[var(--primary)]/20"
-            />
+            {magicRewriteMode ? (
+              <MagicRewritePanel value={local} onResultChange={handleMagicRewriteResultChange} />
+            ) : (
+              <textarea
+                ref={textareaRef}
+                value={local}
+                onChange={(e) => setLocal(e.target.value)}
+                placeholder={placeholder}
+                className="h-full w-full resize-none rounded-xl border border-[var(--border)] bg-[var(--secondary)] p-5 text-sm leading-relaxed outline-none transition-colors placeholder:text-[var(--muted-foreground)]/40 focus:border-[var(--primary)]/40 focus:ring-1 focus:ring-[var(--primary)]/20"
+              />
+            )}
           </div>
         </motion.div>
       )}
diff --git a/packages/client/src/components/ui/MagicRewritePanel.tsx b/packages/client/src/components/ui/MagicRewritePanel.tsx
new file mode 100644
index 000000000..127645594
--- /dev/null
+++ b/packages/client/src/components/ui/MagicRewritePanel.tsx
@@ -0,0 +1,133 @@
+// ──────────────────────────────────────────────
+// Magic Rewrite Panel
+//
+// Instruction + generate + before/after diff view.
+// Context selectors and chat-history inclusion are
+// intentionally omitted for V1 — follow-up PRs will
+// add richer context controls once the basic workflow
+// has landed.
+// ──────────────────────────────────────────────
+import { useEffect, useMemo } from "react";
+import { Sparkles, Loader2 } from "lucide-react";
+import { HelpTooltip } from "./HelpTooltip";
+import { useMagicRewrite } from "../../hooks/use-magic-rewrite";
+
+type DiffPart = { text: string; changed: boolean };
+type DiffResult =
+  | { skipped: true; before: string; after: string }
+  | { skipped: false; before: DiffPart[]; after: DiffPart[] };
+
+function diffWords(before: string, after: string): DiffResult {
+  const beforeWords = before.match(/\S+|\s+/g) ?? [];
+  const afterWords = after.match(/\S+|\s+/g) ?? [];
+  if (beforeWords.length + afterWords.length > 3000) {
+    return { before, after, skipped: true };
+  }
+
+  const dp = Array.from({ length: beforeWords.length + 1 }, () => new Uint16Array(afterWords.length + 1));
+  for (let i = 1; i <= beforeWords.length; i++) {
+    for (let j = 1; j <= afterWords.length; j++) {
+      dp[i][j] = beforeWords[i - 1] === afterWords[j - 1] ? dp[i - 1][j - 1] + 1 : Math.max(dp[i - 1][j], dp[i][j - 1]);
+    }
+  }
+
+  const deleted = new Uint8Array(beforeWords.length);
+  const added = new Uint8Array(afterWords.length);
+  let i = beforeWords.length;
+  let j = afterWords.length;
+  while (i > 0 || j > 0) {
+    if (i > 0 && j > 0 && beforeWords[i - 1] === afterWords[j - 1]) {
+      i--;
+      j--;
+    } else if (j > 0 && (i === 0 || dp[i][j - 1] >= dp[i - 1][j])) {
+      added[--j] = 1;
+    } else {
+      deleted[--i] = 1;
+    }
+  }
+
+  return {
+    skipped: false,
+    before: beforeWords.map((word, index) => ({ text: word, changed: deleted[index] === 1 })),
+    after: afterWords.map((word, index) => ({ text: word, changed: added[index] === 1 })),
+  };
+}
+
+export function MagicRewritePanel({
+  value,
+  onResultChange,
+}: {
+  value: string;
+  onResultChange: (value: string) => void;
+}) {
+  const { instruction, setInstruction, result, loading, error, generate } = useMagicRewrite(value);
+
+  const diff = useMemo(() => (result ? diffWords(value, result) : null), [value, result]);
+
+  useEffect(() => {
+    onResultChange(result);
+  }, [onResultChange, result]);
+
+  return (
+    <div className="flex h-full flex-col gap-4 overflow-hidden">
+      <div className="grid gap-4 lg:grid-cols-[minmax(0,3fr)_minmax(12rem,1fr)]">
+        <div className="flex min-w-0 flex-col">
+          <div className="mb-1.5 text-[0.65rem] font-semibold uppercase tracking-wide text-[var(--muted-foreground)]">
+            Rewrite instructions <HelpTooltip text="Uses your default agent connection." />
+          </div>
+          <textarea
+            value={instruction}
+            onChange={(event) => setInstruction(event.target.value)}
+            placeholder='e.g. "Make this more vivid and dramatic..."'
+            className="min-h-0 flex-1 resize-none rounded-xl bg-[var(--secondary)] p-3 text-sm ring-1 ring-[var(--border)] focus:outline-none focus:ring-2 focus:ring-violet-500/50"
+          />
+        </div>
+
+        <div className="flex min-h-0 flex-col">
+          {error && <p className="mb-3 text-xs text-red-300">{error}</p>}
+          <div className="mt-auto">
+            <button
+              onClick={generate}
+              disabled={loading}
+              className="inline-flex w-full items-center justify-center gap-2 rounded-xl border border-violet-400/40 bg-violet-500/10 px-4 py-2 text-sm font-medium text-violet-200 transition hover:bg-violet-500/20 disabled:cursor-wait disabled:opacity-60"
+            >
+              {loading ? <Loader2 size="1rem" className="animate-spin" /> : <Sparkles size="1rem" />}
+              {loading ? "Rewriting…" : "Generate Rewrite"}
+            </button>
+          </div>
+        </div>
+      </div>
+
+      <div className="grid min-h-0 flex-1 gap-4 lg:grid-cols-2">
+        <div className="min-h-0 overflow-auto rounded-xl bg-[var(--secondary)] p-3 text-sm ring-1 ring-[var(--border)]">
+          <div className="mb-2 text-[0.65rem] font-semibold uppercase tracking-wide text-[var(--muted-foreground)]">
+            Before
+          </div>
+          <div className="whitespace-pre-wrap break-words font-sans">
+            {diff && !diff.skipped && Array.isArray(diff.before)
+              ? diff.before.map((part, index) => (
+                  <span key={index} className={part.changed ? "bg-red-500/20 text-red-200 line-through" : undefined}>
+                    {part.text}
+                  </span>
+                ))
+              : value}
+          </div>
+        </div>
+        <div className="min-h-0 overflow-auto rounded-xl bg-[var(--secondary)] p-3 text-sm ring-1 ring-[var(--border)]">
+          <div className="mb-2 text-[0.65rem] font-semibold uppercase tracking-wide text-[var(--muted-foreground)]">
+            After
+          </div>
+          <div className="whitespace-pre-wrap break-words font-sans">
+            {diff && !diff.skipped && Array.isArray(diff.after)
+              ? diff.after.map((part, index) => (
+                  <span key={index} className={part.changed ? "bg-emerald-500/20 text-emerald-200" : undefined}>
+                    {part.text}
+                  </span>
+                ))
+              : result || "Generated rewrite will appear here."}
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/packages/client/src/hooks/use-magic-rewrite.ts b/packages/client/src/hooks/use-magic-rewrite.ts
new file mode 100644
index 000000000..67f25d413
--- /dev/null
+++ b/packages/client/src/hooks/use-magic-rewrite.ts
@@ -0,0 +1,59 @@
+import { useEffect, useState } from "react";
+import { api } from "../lib/api-client";
+
+const PROMPT_KEY = "magic-rewrite-prompt";
+
+type RewriteResponse = { text: string };
+
+function readStoredInstruction() {
+  try {
+    return window.localStorage.getItem(PROMPT_KEY) ?? "";
+  } catch {
+    return "";
+  }
+}
+
+function writeStoredInstruction(instruction: string) {
+  try {
+    window.localStorage.setItem(PROMPT_KEY, instruction);
+  } catch {
+    // Ignore storage failures; the rewrite flow still works without persistence.
+  }
+}
+
+export function useMagicRewrite(value: string) {
+  const [instruction, setInstruction] = useState(readStoredInstruction);
+  const [result, setResult] = useState("");
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState("");
+
+  useEffect(() => {
+    const timer = window.setTimeout(() => writeStoredInstruction(instruction), 300);
+    return () => window.clearTimeout(timer);
+  }, [instruction]);
+
+  async function generate() {
+    setLoading(true);
+    setError("");
+    try {
+      const response = await api.post<RewriteResponse>("/magic-rewrite/generate", {
+        text: value,
+        instruction,
+      });
+      setResult(response.text ?? "");
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Magic Rewrite failed");
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  return {
+    instruction,
+    setInstruction,
+    result,
+    loading,
+    error,
+    generate,
+  };
+}
diff --git a/packages/server/src/routes/index.ts b/packages/server/src/routes/index.ts
index d100abb0b..2a398d4a7 100644
--- a/packages/server/src/routes/index.ts
+++ b/packages/server/src/routes/index.ts
@@ -50,6 +50,7 @@ import { sidecarRoutes } from "./sidecar.routes.js";
 import { ttsRoutes } from "./tts.routes.js";
 import { promptOverridesRoutes } from "./prompt-overrides.routes.js";
 import { csrfDiagnosticsRoutes } from "./csrf-diagnostics.routes.js";
+import { magicRewriteRoutes } from "./magic-rewrite.routes.js";
 
 export async function registerRoutes(app: FastifyInstance) {
   await app.register(chatsRoutes, { prefix: "/api/chats" });
@@ -99,6 +100,7 @@ export async function registerRoutes(app: FastifyInstance) {
   await app.register(ttsRoutes, { prefix: "/api/tts" });
   await app.register(promptOverridesRoutes, { prefix: "/api/prompt-overrides" });
   await app.register(csrfDiagnosticsRoutes, { prefix: "/api/csrf" });
+  await app.register(magicRewriteRoutes, { prefix: "/api/magic-rewrite" });
   if (process.env.MARINARA_LITE !== "true" && process.env.MARINARA_LITE !== "1") {
     await app.register(sidecarRoutes, { prefix: "/api/sidecar" });
   }
diff --git a/packages/server/src/routes/magic-rewrite.routes.ts b/packages/server/src/routes/magic-rewrite.routes.ts
new file mode 100644
index 000000000..2dc189463
--- /dev/null
+++ b/packages/server/src/routes/magic-rewrite.routes.ts
@@ -0,0 +1,34 @@
+// ──────────────────────────────────────────────
+// Routes: Magic Rewrite
+//
+// Generates AI-assisted rewrites of editor text
+// using the user's instruction. Falls back through
+// the existing default chat/agent connections.
+// ──────────────────────────────────────────────
+import type { FastifyInstance } from "fastify";
+import { logger } from "../lib/logger.js";
+import {
+  generateMagicRewrite,
+  MagicRewriteConfigError,
+  magicRewriteSchema,
+} from "../services/magic-rewrite/magic-rewrite.service.js";
+
+export async function magicRewriteRoutes(app: FastifyInstance) {
+  app.post("/generate", async (req, reply) => {
+    const parsed = magicRewriteSchema.safeParse(req.body);
+    if (!parsed.success) {
+      return reply.status(400).send({ error: "Invalid request", details: parsed.error.issues });
+    }
+    const input = parsed.data;
+
+    try {
+      return await generateMagicRewrite(app.db, input);
+    } catch (error) {
+      if (error instanceof MagicRewriteConfigError) {
+        return reply.status(error.statusCode).send({ error: error.message });
+      }
+      logger.error(error, "Magic Rewrite generation failed");
+      return reply.status(500).send({ error: "Magic Rewrite generation failed" });
+    }
+  });
+}
diff --git a/packages/server/src/services/magic-rewrite/magic-rewrite.service.ts b/packages/server/src/services/magic-rewrite/magic-rewrite.service.ts
new file mode 100644
index 000000000..14260c1bc
--- /dev/null
+++ b/packages/server/src/services/magic-rewrite/magic-rewrite.service.ts
@@ -0,0 +1,98 @@
+import { PROVIDERS } from "@marinara-engine/shared";
+import { z } from "zod";
+import type { DB } from "../../db/connection.js";
+import type { ChatMessage } from "../llm/base-provider.js";
+import { createLLMProvider } from "../llm/provider-registry.js";
+import { createConnectionsStorage } from "../storage/connections.storage.js";
+
+export const magicRewriteSchema = z.object({
+  text: z.string().default(""),
+  instruction: z.string().default(""),
+});
+
+export type MagicRewriteInput = z.infer<typeof magicRewriteSchema>;
+
+export type MagicRewriteResult = {
+  text: string;
+  finishReason: string | null | undefined;
+  usage: unknown;
+};
+
+export class MagicRewriteConfigError extends Error {
+  readonly statusCode = 400;
+}
+
+const REWRITE_SYSTEM_PROMPT = `You are a rewriting assistant for roleplay, fiction, and worldbuilding content.
+Rewrite or generate the requested text according to the user's instructions.
+Return ONLY the rewritten text -- no explanations, no markdown fences, no preamble.`;
+
+function resolveBaseUrl(conn: { provider: string; baseUrl: string | null }): string {
+  if (conn.baseUrl) return conn.baseUrl;
+  if (conn.provider === "claude_subscription") return "claude-agent-sdk://local";
+  if (conn.provider === "openai_chatgpt") return "openai-chatgpt://codex-auth";
+  const providerDef = PROVIDERS[conn.provider as keyof typeof PROVIDERS];
+  return providerDef?.defaultBaseUrl ?? "";
+}
+
+function buildRewriteMessages(input: MagicRewriteInput): ChatMessage[] {
+  const hasSourceText = input.text.trim().length > 0;
+  const instruction =
+    input.instruction.trim() ||
+    (hasSourceText ? "Improve this text while preserving its meaning." : "Generate suitable content.");
+
+  return [
+    { role: "system", content: REWRITE_SYSTEM_PROMPT },
+    {
+      role: "user",
+      content: hasSourceText
+        ? `Instruction:\n${instruction}\n\n---\n\nText to rewrite:\n${input.text}`
+        : `Instruction:\n${instruction}\n\n---\n\nNo source text was provided; generate new content from the instruction.`,
+    },
+  ];
+}
+
+export async function generateMagicRewrite(db: DB, input: MagicRewriteInput): Promise<MagicRewriteResult> {
+  const connections = createConnectionsStorage(db);
+
+  // Resolve connection: default chat -> default agent.
+  const defaultChat = await connections.getDefault();
+  const conn = defaultChat ? await connections.getWithKey(defaultChat.id) : await connections.getDefaultForAgents();
+
+  if (!conn) {
+    throw new MagicRewriteConfigError("No default agent connection configured");
+  }
+
+  if (conn.provider === "image_generation") {
+    throw new MagicRewriteConfigError("Default connection is an image generation provider");
+  }
+
+  const baseUrl = resolveBaseUrl(conn);
+  if (!baseUrl) {
+    throw new MagicRewriteConfigError("No base URL configured for the default connection");
+  }
+
+  const provider = createLLMProvider(
+    conn.provider,
+    baseUrl,
+    conn.apiKey,
+    conn.maxContext,
+    conn.openrouterProvider,
+    conn.maxTokensOverride,
+    conn.claudeFastMode === "true",
+  );
+
+  const result = await provider.chatComplete(buildRewriteMessages(input), {
+    model: conn.model,
+    temperature: 0.7,
+    maxTokens: 4000,
+    stream: false,
+    enableCaching: conn.enableCaching === "true",
+    cachingAtDepth: conn.cachingAtDepth,
+  });
+
+  return {
+    text: result.content?.trim() ?? "",
+    finishReason: result.finishReason,
+    usage: result.usage ?? null,
+  };
+}