diff --git a/src/components/ui/sheet/Sheet.vue b/src/components/ui/sheet/Sheet.vue
new file mode 100644
index 000000000..ecdbffe0c
--- /dev/null
+++ b/src/components/ui/sheet/Sheet.vue
@@ -0,0 +1,15 @@
+<script setup lang="ts">
+import type { DialogRootEmits, DialogRootProps } from "reka-ui";
+import { DialogRoot, useForwardPropsEmits } from "reka-ui";
+
+const props = defineProps<DialogRootProps>();
+const emits = defineEmits<DialogRootEmits>();
+
+const forwarded = useForwardPropsEmits(props, emits);
+</script>
+
+<template>
+  <DialogRoot v-slot="slotProps" data-slot="sheet" v-bind="forwarded">
+    <slot v-bind="slotProps" />
+  </DialogRoot>
+</template>
diff --git a/src/components/ui/sheet/SheetClose.vue b/src/components/ui/sheet/SheetClose.vue
new file mode 100644
index 000000000..cc1574196
--- /dev/null
+++ b/src/components/ui/sheet/SheetClose.vue
@@ -0,0 +1,12 @@
+<script setup lang="ts">
+import type { DialogCloseProps } from "reka-ui";
+import { DialogClose } from "reka-ui";
+
+const props = defineProps<DialogCloseProps>();
+</script>
+
+<template>
+  <DialogClose data-slot="sheet-close" v-bind="props">
+    <slot />
+  </DialogClose>
+</template>
diff --git a/src/components/ui/sheet/SheetContent.vue b/src/components/ui/sheet/SheetContent.vue
new file mode 100644
index 000000000..b581b2d91
--- /dev/null
+++ b/src/components/ui/sheet/SheetContent.vue
@@ -0,0 +1,59 @@
+<script setup lang="ts">
+import type { DialogContentEmits, DialogContentProps } from "reka-ui";
+
+import type { HTMLAttributes } from "vue";
+import { reactiveOmit } from "@vueuse/core";
+import { XIcon } from "lucide-vue-next";
+import { DialogClose, DialogContent, DialogPortal, useForwardPropsEmits } from "reka-ui";
+import { cn } from "@/lib/utils";
+import { Button } from "@/components/ui/button";
+import SheetOverlay from "./SheetOverlay.vue";
+
+interface SheetContentProps extends DialogContentProps {
+  class?: HTMLAttributes["class"];
+  side?: "top" | "right" | "bottom" | "left";
+  showCloseButton?: boolean;
+}
+
+defineOptions({
+  inheritAttrs: false,
+});
+
+const props = withDefaults(defineProps<SheetContentProps>(), {
+  side: "right",
+  showCloseButton: true,
+});
+const emits = defineEmits<DialogContentEmits>();
+
+const delegatedProps = reactiveOmit(props, "class", "side", "showCloseButton");
+
+const forwarded = useForwardPropsEmits(delegatedProps, emits);
+</script>
+
+<template>
+  <DialogPortal>
+    <DialogClose as-child>
+      <SheetOverlay />
+    </DialogClose>
+    <DialogContent
+      data-slot="sheet-content"
+      :data-side="side"
+      :class="
+        cn(
+          'bg-popover text-popover-foreground fixed z-50 flex flex-col gap-4 bg-clip-padding text-sm shadow-lg transition duration-200 ease-in-out data-[side=bottom]:inset-x-0 data-[side=bottom]:bottom-0 data-[side=bottom]:h-auto data-[side=bottom]:border-t data-[side=left]:inset-y-0 data-[side=left]:left-0 data-[side=left]:h-full data-[side=left]:w-3/4 data-[side=left]:border-r data-[side=right]:inset-y-0 data-[side=right]:right-0 data-[side=right]:h-full data-[side=right]:w-3/4 data-[side=right]:border-l data-[side=top]:inset-x-0 data-[side=top]:top-0 data-[side=top]:h-auto data-[side=top]:border-b data-[side=left]:sm:max-w-sm data-[side=right]:sm:max-w-sm data-open:animate-in data-open:fade-in-0 data-[side=bottom]:data-open:slide-in-from-bottom-10 data-[side=left]:data-open:slide-in-from-left-10 data-[side=right]:data-open:slide-in-from-right-10 data-[side=top]:data-open:slide-in-from-top-10 data-closed:animate-out data-closed:fade-out-0 data-[side=bottom]:data-closed:slide-out-to-bottom-10 data-[side=left]:data-closed:slide-out-to-left-10 data-[side=right]:data-closed:slide-out-to-right-10 data-[side=top]:data-closed:slide-out-to-top-10',
+          props.class,
+        )
+      "
+      v-bind="{ ...$attrs, ...forwarded }"
+    >
+      <slot />
+
+      <DialogClose v-if="showCloseButton" data-slot="sheet-close" as-child>
+        <Button variant="ghost" class="absolute top-3 right-3" size="icon-sm">
+          <XIcon />
+          <span class="sr-only">Close</span>
+        </Button>
+      </DialogClose>
+    </DialogContent>
+  </DialogPortal>
+</template>
diff --git a/src/components/ui/sheet/SheetDescription.vue b/src/components/ui/sheet/SheetDescription.vue
new file mode 100644
index 000000000..9a8eb2f24
--- /dev/null
+++ b/src/components/ui/sheet/SheetDescription.vue
@@ -0,0 +1,21 @@
+<script setup lang="ts">
+import type { DialogDescriptionProps } from "reka-ui";
+import type { HTMLAttributes } from "vue";
+import { reactiveOmit } from "@vueuse/core";
+import { DialogDescription } from "reka-ui";
+import { cn } from "@/lib/utils";
+
+const props = defineProps<DialogDescriptionProps & { class?: HTMLAttributes["class"] }>();
+
+const delegatedProps = reactiveOmit(props, "class");
+</script>
+
+<template>
+  <DialogDescription
+    data-slot="sheet-description"
+    :class="cn('text-muted-foreground text-sm', props.class)"
+    v-bind="delegatedProps"
+  >
+    <slot />
+  </DialogDescription>
+</template>
diff --git a/src/components/ui/sheet/SheetFooter.vue b/src/components/ui/sheet/SheetFooter.vue
new file mode 100644
index 000000000..7ac7948ab
--- /dev/null
+++ b/src/components/ui/sheet/SheetFooter.vue
@@ -0,0 +1,12 @@
+<script setup lang="ts">
+import type { HTMLAttributes } from "vue";
+import { cn } from "@/lib/utils";
+
+const props = defineProps<{ class?: HTMLAttributes["class"] }>();
+</script>
+
+<template>
+  <div data-slot="sheet-footer" :class="cn('gap-2 p-4 mt-auto flex flex-col', props.class)">
+    <slot />
+  </div>
+</template>
diff --git a/src/components/ui/sheet/SheetHeader.vue b/src/components/ui/sheet/SheetHeader.vue
new file mode 100644
index 000000000..bad371dd5
--- /dev/null
+++ b/src/components/ui/sheet/SheetHeader.vue
@@ -0,0 +1,12 @@
+<script setup lang="ts">
+import type { HTMLAttributes } from "vue";
+import { cn } from "@/lib/utils";
+
+const props = defineProps<{ class?: HTMLAttributes["class"] }>();
+</script>
+
+<template>
+  <div data-slot="sheet-header" :class="cn('gap-0.5 p-4 flex flex-col', props.class)">
+    <slot />
+  </div>
+</template>
diff --git a/src/components/ui/sheet/SheetTitle.vue b/src/components/ui/sheet/SheetTitle.vue
new file mode 100644
index 000000000..ce9aece81
--- /dev/null
+++ b/src/components/ui/sheet/SheetTitle.vue
@@ -0,0 +1,21 @@
+<script setup lang="ts">
+import type { DialogTitleProps } from "reka-ui";
+import type { HTMLAttributes } from "vue";
+import { reactiveOmit } from "@vueuse/core";
+import { DialogTitle } from "reka-ui";
+import { cn } from "@/lib/utils";
+
+const props = defineProps<DialogTitleProps & { class?: HTMLAttributes["class"] }>();
+
+const delegatedProps = reactiveOmit(props, "class");
+</script>
+
+<template>
+  <DialogTitle
+    data-slot="sheet-title"
+    :class="cn('text-foreground text-base font-medium cn-font-heading', props.class)"
+    v-bind="delegatedProps"
+  >
+    <slot />
+  </DialogTitle>
+</template>
diff --git a/src/components/ui/sheet/SheetTrigger.vue b/src/components/ui/sheet/SheetTrigger.vue
new file mode 100644
index 000000000..a57258ef7
--- /dev/null
+++ b/src/components/ui/sheet/SheetTrigger.vue
@@ -0,0 +1,12 @@
+<script setup lang="ts">
+import type { DialogTriggerProps } from "reka-ui";
+import { DialogTrigger } from "reka-ui";
+
+const props = defineProps<DialogTriggerProps>();
+</script>
+
+<template>
+  <DialogTrigger data-slot="sheet-trigger" v-bind="props">
+    <slot />
+  </DialogTrigger>
+</template>
diff --git a/src/components/ui/sheet/index.ts b/src/components/ui/sheet/index.ts
new file mode 100644
index 000000000..b94a071f2
--- /dev/null
+++ b/src/components/ui/sheet/index.ts
@@ -0,0 +1,8 @@
+export { default as Sheet } from "./Sheet.vue";
+export { default as SheetClose } from "./SheetClose.vue";
+export { default as SheetContent } from "./SheetContent.vue";
+export { default as SheetDescription } from "./SheetDescription.vue";
+export { default as SheetFooter } from "./SheetFooter.vue";
+export { default as SheetHeader } from "./SheetHeader.vue";
+export { default as SheetTitle } from "./SheetTitle.vue";
+export { default as SheetTrigger } from "./SheetTrigger.vue";
diff --git a/src/lib/api.ts b/src/lib/api.ts
index 89d2ee42c..dd1b91369 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -111,6 +111,7 @@ export const redisDeleteKey = forward("redisDeleteKey");
 export const redisHashSet = forward("redisHashSet");
 export const redisHashDel = forward("redisHashDel");
 export const redisListPush = forward("redisListPush");
+export const redisListSet = forward("redisListSet");
 export const redisListRemove = forward("redisListRemove");
 export const redisSetAdd = forward("redisSetAdd");
 export const redisSetRemove = forward("redisSetRemove");
diff --git a/src/lib/http.ts b/src/lib/http.ts
index fa9212076..cc1ca579c 100644
--- a/src/lib/http.ts
+++ b/src/lib/http.ts
@@ -597,6 +597,16 @@ export async function redisListPush(connectionId: string, db: number, keyRaw: st
   return post("/api/redis/list-push", { connectionId, db, keyRaw, value });
 }
 
+export async function redisListSet(
+  connectionId: string,
+  db: number,
+  keyRaw: string,
+  index: number,
+  value: string,
+): Promise<void> {
+  return post("/api/redis/list-set", { connectionId, db, keyRaw, index, value });
+}
+
 export async function redisListRemove(connectionId: string, db: number, keyRaw: string, index: number): Promise<void> {
   return post("/api/redis/list-remove", { connectionId, db, keyRaw, index });
 }
diff --git a/src/lib/redisValuePresentation.ts b/src/lib/redisValuePresentation.ts
index fdcad551b..d51174c77 100644
--- a/src/lib/redisValuePresentation.ts
+++ b/src/lib/redisValuePresentation.ts
@@ -5,6 +5,23 @@ export interface RedisMemberDetail {
   format: RedisMemberDetailFormat;
 }
 
+export type RedisMemberDetailKind = "list" | "set" | "hash" | "zset" | "stream";
+
+export const REDIS_MEMBER_DETAIL_SHEET_MIN_WIDTH = 360;
+export const REDIS_MEMBER_DETAIL_SHEET_MAX_WIDTH = 900;
+
+export function canEditRedisMemberDetail(kind: RedisMemberDetailKind): boolean {
+  return kind !== "stream";
+}
+
+export function clampRedisMemberDetailSheetWidth(width: number, viewportWidth: number): number {
+  const viewportMax = Math.max(REDIS_MEMBER_DETAIL_SHEET_MIN_WIDTH, viewportWidth - 32);
+  return Math.min(
+    Math.min(REDIS_MEMBER_DETAIL_SHEET_MAX_WIDTH, viewportMax),
+    Math.max(REDIS_MEMBER_DETAIL_SHEET_MIN_WIDTH, width),
+  );
+}
+
 export function formatRedisMemberDetail(value: unknown): RedisMemberDetail {
   if (typeof value === "string") {
     const trimmed = value.trim();
@@ -24,3 +41,22 @@ export function formatRedisMemberDetail(value: unknown): RedisMemberDetail {
     return { text: String(value), format: "text" };
   }
 }
+
+export function getRedisMemberSelectionKey(title: string, value: unknown): string {
+  return `${title}\n${formatRedisMemberDetail(value).text}`;
+}
+
+export function highlightRedisJsonDetail(json: string): string {
+  const escaped = json.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+
+  return escaped.replace(
+    /("(?:\\u[a-fA-F0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(?:true|false|null)\b|-?\d+(?:\.\d+)?(?:[eE][+-]?\d+)?)/g,
+    (match) => {
+      let cls = "json-number";
+      if (match.startsWith('"')) cls = match.endsWith(":") ? "json-key" : "json-string";
+      else if (match === "true" || match === "false") cls = "json-boolean";
+      else if (match === "null") cls = "json-null";
+      return `<span class="${cls}">${match}</span>`;
+    },
+  );
+}
diff --git a/src/lib/tauri.ts b/src/lib/tauri.ts
index 370e75324..a066ed94a 100644
--- a/src/lib/tauri.ts
+++ b/src/lib/tauri.ts
@@ -429,6 +429,16 @@ export async function redisListPush(connectionId: string, db: number, keyRaw: st
   return invoke("redis_list_push", { connectionId, db, keyRaw, value });
 }
 
+export async function redisListSet(
+  connectionId: string,
+  db: number,
+  keyRaw: string,
+  index: number,
+  value: string,
+): Promise<void> {
+  return invoke("redis_list_set", { connectionId, db, keyRaw, index, value });
+}
+
 export async function redisListRemove(connectionId: string, db: number, keyRaw: string, index: number): Promise<void> {
   return invoke("redis_list_remove", { connectionId, db, keyRaw, index });
 }
diff --git a/tests/redisValuePresentation.test.ts b/tests/redisValuePresentation.test.ts
index 54c4cd928..92fbadb81 100644
--- a/tests/redisValuePresentation.test.ts
+++ b/tests/redisValuePresentation.test.ts
@@ -1,6 +1,12 @@
 import { strict as assert } from "node:assert";
 import test from "node:test";
-import { formatRedisMemberDetail } from "../src/lib/redisValuePresentation.ts";
+import {
+  canEditRedisMemberDetail,
+  clampRedisMemberDetailSheetWidth,
+  formatRedisMemberDetail,
+  getRedisMemberSelectionKey,
+  highlightRedisJsonDetail,
+} from "../src/lib/redisValuePresentation.ts";
 
 test("formats JSON object strings for Redis member details", () => {
   const detail = formatRedisMemberDetail('{"id":1,"name":"Ada","tags":["dbx","redis"]}');
@@ -22,3 +28,35 @@ test("formats non-string Redis member values as JSON", () => {
   assert.equal(detail.format, "json");
   assert.equal(detail.text, '{\n  "field": "name",\n  "value": "{\\"nested\\":true}"\n}');
 });
+
+test("builds stable Redis member selection keys from title and formatted value", () => {
+  const key = getRedisMemberSelectionKey("#2", '{"id":240,"kind":"json"}');
+
+  assert.equal(key, '#2\n{\n  "id": 240,\n  "kind": "json"\n}');
+});
+
+test("highlights formatted Redis JSON detail safely", () => {
+  const html = highlightRedisJsonDetail('{"id":240,"name":"<script>","active":true,"meta":null}');
+
+  assert.match(html, /<span class="json-key">"id":<\/span>/);
+  assert.match(html, /<span class="json-number">240<\/span>/);
+  assert.match(html, /<span class="json-string">"&lt;script&gt;"<\/span>/);
+  assert.match(html, /<span class="json-boolean">true<\/span>/);
+  assert.match(html, /<span class="json-null">null<\/span>/);
+  assert.doesNotMatch(html, /<script>/);
+});
+
+test("allows editing Redis collection members except stream fields", () => {
+  assert.equal(canEditRedisMemberDetail("list"), true);
+  assert.equal(canEditRedisMemberDetail("hash"), true);
+  assert.equal(canEditRedisMemberDetail("set"), true);
+  assert.equal(canEditRedisMemberDetail("zset"), true);
+  assert.equal(canEditRedisMemberDetail("stream"), false);
+});
+
+test("clamps Redis member detail sheet width to viewport and usable bounds", () => {
+  assert.equal(clampRedisMemberDetailSheetWidth(200, 1200), 360);
+  assert.equal(clampRedisMemberDetailSheetWidth(640, 1200), 640);
+  assert.equal(clampRedisMemberDetailSheetWidth(1200, 1400), 900);
+  assert.equal(clampRedisMemberDetailSheetWidth(900, 500), 468);
+});