diff --git a/core/http/react-ui/public/locales/de/auth.json b/core/http/react-ui/public/locales/de/auth.json
index f0232dda09..d1b1121932 100644
--- a/core/http/react-ui/public/locales/de/auth.json
+++ b/core/http/react-ui/public/locales/de/auth.json
@@ -55,7 +55,8 @@
       "security": "Sicherheit",
       "apiKeys": "API-Schlüssel",
       "about": "Über dich und den Assistenten",
-      "appearance": "Darstellung"
+      "appearance": "Darstellung",
+      "memory": "Gedächtnis"
     },
     "profile": {
       "displayName": "Anzeigename",
diff --git a/core/http/react-ui/public/locales/en/auth.json b/core/http/react-ui/public/locales/en/auth.json
index 68594b46f2..705cbe7235 100644
--- a/core/http/react-ui/public/locales/en/auth.json
+++ b/core/http/react-ui/public/locales/en/auth.json
@@ -80,7 +80,8 @@
       "apiKeys": "API keys",
       "usage": "Usage",
       "about": "About you and the assistant",
-      "appearance": "Appearance"
+      "appearance": "Appearance",
+      "memory": "Memory"
     },
     "profile": {
       "displayName": "Display name",
diff --git a/core/http/react-ui/public/locales/es/auth.json b/core/http/react-ui/public/locales/es/auth.json
index 0c799e9388..6449180f06 100644
--- a/core/http/react-ui/public/locales/es/auth.json
+++ b/core/http/react-ui/public/locales/es/auth.json
@@ -55,7 +55,8 @@
       "security": "Seguridad",
       "apiKeys": "Claves API",
       "about": "Sobre ti y el asistente",
-      "appearance": "Apariencia"
+      "appearance": "Apariencia",
+      "memory": "Memoria"
     },
     "profile": {
       "displayName": "Nombre para mostrar",
diff --git a/core/http/react-ui/public/locales/fr/auth.json b/core/http/react-ui/public/locales/fr/auth.json
index 596540ebf1..0ffffdf8df 100644
--- a/core/http/react-ui/public/locales/fr/auth.json
+++ b/core/http/react-ui/public/locales/fr/auth.json
@@ -55,7 +55,8 @@
       "security": "Sécurité",
       "apiKeys": "Clés d'API",
       "about": "À propos de vous et de l'assistant",
-      "appearance": "Apparence"
+      "appearance": "Apparence",
+      "memory": "Mémoire"
     },
     "profile": {
       "displayName": "Nom affiché",
diff --git a/core/http/react-ui/public/locales/id/auth.json b/core/http/react-ui/public/locales/id/auth.json
index 9d1c5752e1..e936a88c91 100644
--- a/core/http/react-ui/public/locales/id/auth.json
+++ b/core/http/react-ui/public/locales/id/auth.json
@@ -55,7 +55,8 @@
       "security": "Keamanan",
       "apiKeys": "API Key",
       "about": "Tentang Anda dan asisten",
-      "appearance": "Tampilan"
+      "appearance": "Tampilan",
+      "memory": "Memori"
     },
     "profile": {
       "displayName": "Nama tampilan",
diff --git a/core/http/react-ui/public/locales/it/auth.json b/core/http/react-ui/public/locales/it/auth.json
index fa24696154..2ad1a4f074 100644
--- a/core/http/react-ui/public/locales/it/auth.json
+++ b/core/http/react-ui/public/locales/it/auth.json
@@ -55,7 +55,8 @@
       "security": "Sicurezza",
       "apiKeys": "Chiavi API",
       "about": "Su di te e sull'assistente",
-      "appearance": "Aspetto"
+      "appearance": "Aspetto",
+      "memory": "Memoria"
     },
     "profile": {
       "displayName": "Nome visualizzato",
diff --git a/core/http/react-ui/public/locales/ko/auth.json b/core/http/react-ui/public/locales/ko/auth.json
index 37bac414f4..8d7d7f97fd 100644
--- a/core/http/react-ui/public/locales/ko/auth.json
+++ b/core/http/react-ui/public/locales/ko/auth.json
@@ -55,7 +55,8 @@
       "security": "보안",
       "apiKeys": "API 키",
       "about": "나와 어시스턴트에 대하여",
-      "appearance": "모양"
+      "appearance": "모양",
+      "memory": "메모리"
     },
     "profile": {
       "displayName": "표시 이름",
diff --git a/core/http/react-ui/public/locales/pt-BR/auth.json b/core/http/react-ui/public/locales/pt-BR/auth.json
index 6988bf7536..be78eb1af3 100644
--- a/core/http/react-ui/public/locales/pt-BR/auth.json
+++ b/core/http/react-ui/public/locales/pt-BR/auth.json
@@ -55,7 +55,8 @@
       "security": "Segurança",
       "apiKeys": "Chaves de API",
       "about": "Sobre você e o assistente",
-      "appearance": "Aparência"
+      "appearance": "Aparência",
+      "memory": "Memória"
     },
     "profile": {
       "displayName": "Nome de exibição",
diff --git a/core/http/react-ui/public/locales/zh-CN/auth.json b/core/http/react-ui/public/locales/zh-CN/auth.json
index 21a60bf8dc..6c6a4e10a7 100644
--- a/core/http/react-ui/public/locales/zh-CN/auth.json
+++ b/core/http/react-ui/public/locales/zh-CN/auth.json
@@ -55,7 +55,8 @@
       "security": "安全",
       "apiKeys": "API 密钥",
       "about": "关于您和助手",
-      "appearance": "外观"
+      "appearance": "外观",
+      "memory": "记忆"
     },
     "profile": {
       "displayName": "显示名称",
diff --git a/core/http/react-ui/src/components/MemoryTab.jsx b/core/http/react-ui/src/components/MemoryTab.jsx
new file mode 100644
index 0000000000..c4f1b9e54e
--- /dev/null
+++ b/core/http/react-ui/src/components/MemoryTab.jsx
@@ -0,0 +1,212 @@
+/* eslint-disable no-unused-vars -- components used only inside JSX look unused to this config, which has no eslint-plugin-react */
+import { useCallback, useEffect, useId, useState } from 'react'
+import { useTranslation } from 'react-i18next'
+import { Link } from 'react-router-dom'
+import { chatChangesApi, filesApi } from '../utils/api'
+import { byteText } from '../utils/changeProposal'
+import { allFiles, groupId, groupKind, indexFits, indexUse } from '../utils/memoryFiles'
+import Icon from './Icon'
+import { Button, Callout, EmptyState, LoadError, SkeletonRows } from './ui'
+import './memorytab.css'
+
+const READ_LIMIT = 64 * 1024
+const path = (p) => (p.startsWith('/') ? p : `/${p}`)
+
+// The size of an index against its caps, as a bar and words. The bar is a
+// progress element, so it is read as "x of y" without a style.
+function Use({ group, t }) {
+  const u = indexUse(group)
+  if (!u.index || !u.maxBytes) return null
+  const words = t(u.maxLines ? 'memoryPage.use' : 'memoryPage.useBytes', { size: byteText(u.bytes), max: byteText(u.maxBytes), lines: u.lines, maxLines: u.maxLines })
+  return (
+    <p className={`mt-use${u.over ? ' mt-use--over' : ''}`} data-testid="memory-use">
+      <progress className="mt-use__bar" value={Math.min(u.bytes, u.maxBytes)} max={u.maxBytes} aria-label={t('memoryPage.useLabel')} />
+      <span>{words}</span>
+      {u.over && <b>{' '}{t('memoryPage.over')}</b>}
+    </p>
+  )
+}
+
+// One file of a group: its name and size, and a panel that shows the text and
+// switches to an editor. The owner writes straight into their own files here;
+// the host keeps every write as a change set, and a delete goes to the Trash.
+function FileRow({ file, group, t, busy, onDelete, onSaved, setError }) {
+  const uid = useId()
+  const [open, setOpen] = useState(false)
+  const [text, setText] = useState(null)
+  const [edit, setEdit] = useState(null)
+  const [saving, setSaving] = useState(false)
+  const [ask, setAsk] = useState(false)
+
+  const toggle = async () => {
+    if (open) { setOpen(false); setEdit(null); return }
+    setOpen(true)
+    if (text === null) {
+      try { setText(await filesApi.readText(path(file.path), READ_LIMIT)) } catch (e) { setText(''); setError(e.message) }
+    }
+  }
+  const fit = file.index && edit !== null ? indexFits(group, edit) : null
+  const save = async () => {
+    setSaving(true)
+    setError('')
+    try {
+      await filesApi.uploadWithProgress(path(file.path), new Blob([edit], { type: 'text/markdown' }), { replace: true })
+      setText(edit)
+      setEdit(null)
+      onSaved(file)
+    } catch (e) {
+      setError(t('memoryPage.saveFailed', { message: e.message }))
+    } finally {
+      setSaving(false)
+    }
+  }
+
+  return (
+    <li className="mt-file" data-testid="memory-file" data-path={file.path}>
+      <div className="mt-file__row">
+        <button type="button" className="mt-file__name" aria-expanded={open} aria-controls={`${uid}-panel`} onClick={toggle}>
+          <Icon name={open ? 'chevron-down' : 'chevron-right'} />
+          <span>{file.name}</span>
+          {file.index && <span className="mt-tag">{t('memoryPage.index')}</span>}
+        </button>
+        <span className="mt-file__size">{byteText(file.size)}</span>
+        {ask ? (
+          <span className="mt-file__acts" role="group" aria-label={t('memoryPage.confirmDelete', { name: file.name })}>
+            <Button size="sm" variant="danger" disabled={busy} data-testid="memory-delete-yes" onClick={() => { setAsk(false); onDelete(file) }}>{t('memoryPage.deleteYes')}</Button>
+            <Button size="sm" variant="ghost" onClick={() => setAsk(false)}>{t('proposal.cancelEdit')}</Button>
+          </span>
+        ) : (
+          <span className="mt-file__acts">
+            <Button size="sm" variant="ghost" icon="trash" disabled={busy} aria-label={t('memoryPage.delete', { name: file.name })} title={t('memoryPage.delete', { name: file.name })} data-testid="memory-delete" onClick={() => setAsk(true)} />
+          </span>
+        )}
+      </div>
+      {open && (
+        <div className="mt-panel" id={`${uid}-panel`}>
+          {text === null ? <SkeletonRows count={2} /> : edit === null ? (
+            <>
+              <pre className="mt-text" tabIndex={0} aria-label={file.name} data-testid="memory-text">{text || t('memoryPage.emptyFile')}</pre>
+              <Button size="sm" icon="edit" data-testid="memory-edit" onClick={() => setEdit(text)}>{t('memoryPage.edit')}</Button>
+            </>
+          ) : (
+            <form onSubmit={(e) => { e.preventDefault(); if (!fit || fit.fits) save() }} onKeyDown={(e) => { if (e.key === 'Escape') { e.stopPropagation(); setEdit(null) } }}>
+              <label className="dk-label" htmlFor={`${uid}-ta`}>{t('memoryPage.editLabel', { name: file.name })}</label>
+              <textarea id={`${uid}-ta`} className="dk-textarea mt-edit" rows={Math.min(16, Math.max(6, edit.split('\n').length + 1))} value={edit} spellCheck={false} autoFocus data-testid="memory-edit-text" aria-describedby={`${uid}-n`} onChange={(e) => setEdit(e.target.value)} />
+              <p className={`mt-help${fit && !fit.fits ? ' mt-help--err' : ''}`} id={`${uid}-n`} data-testid="memory-edit-size">
+                {fit
+                  ? t(group.max_lines ? 'memoryPage.editSizeIndex' : 'memoryPage.editSize', { size: byteText(fit.bytes), max: byteText(group.max_bytes), lines: fit.lines, maxLines: group.max_lines })
+                  : byteText(new TextEncoder().encode(edit).length)}
+                {fit && !fit.fits && <b>{' '}{t('memoryPage.tooBig')}</b>}
+              </p>
+              <span className="mt-acts">
+                <Button type="submit" variant="primary" size="sm" busy={saving} disabled={fit && !fit.fits}>{t('memoryPage.save')}</Button>
+                <Button size="sm" onClick={() => setEdit(null)}>{t('proposal.cancelEdit')}</Button>
+              </span>
+            </form>
+          )}
+        </div>
+      )}
+    </li>
+  )
+}
+
+function groupTitle(g, t) {
+  const kind = groupKind(g)
+  return t(`memoryPage.group.${kind}`, { key: g.key })
+}
+
+// Settings > Memory: the notes the host puts in the prompt of a chat, with
+// their sizes against the caps that keep a turn small. It lists the files of
+// every source the host knows (the user's, each agent's, each connector
+// conversation's) and the agent profiles. The owner can read, edit and delete
+// them here; a model changes them only through a confirmed proposal.
+export default function MemoryTab({ addToast }) {
+  const { t } = useTranslation('chats')
+  const [data, setData] = useState(null)
+  const [error, setError] = useState(null)
+  const [note, setNote] = useState('')
+  const [fail, setFail] = useState('')
+  const [busy, setBusy] = useState(false)
+  const [clear, setClear] = useState(false)
+
+  const load = useCallback(async () => {
+    try {
+      setData(await chatChangesApi.contextFiles())
+      setError(null)
+    } catch (e) {
+      setError(e)
+    }
+  }, [])
+  useEffect(() => { load() }, [load])
+
+  const run = async (call, say) => {
+    setBusy(true)
+    setFail('')
+    try {
+      await call()
+      setNote(say)
+      addToast?.(say, 'success')
+    } catch (e) {
+      setFail(e.message)
+    } finally {
+      setBusy(false)
+      await load()
+    }
+  }
+  const remove = (file) => run(() => filesApi.remove(path(file.path)), t('memoryPage.deleted', { name: file.name }))
+  const removeAll = async () => {
+    const files = allFiles(data?.groups)
+    setClear(false)
+    await run(async () => { for (const f of files) await filesApi.remove(path(f.path)) }, t('memoryPage.cleared', { count: files.length }))
+  }
+
+  if (error) return <LoadError title={t('memoryPage.loadError')} error={error} onRetry={load} testId="memory-load-error" />
+  if (!data) return <div data-testid="memory-tab"><SkeletonRows count={3} /></div>
+
+  const groups = data.groups || []
+  const total = allFiles(groups).length
+  const lim = data.limits || {}
+  return (
+    <div className="mt-tab" data-testid="memory-tab">
+      <p className="mt-lede">{t('memoryPage.lede')}</p>
+      <p className="mt-limits" data-testid="memory-limits">
+        {t('memoryPage.limits', { lines: lim.index_lines, index: byteText(lim.index_bytes), profile: byteText(lim.profile_bytes), turn: byteText(lim.turn_bytes) })}
+      </p>
+      <p className="mt-lede"><Link className="cs-link" to="/app/chats/proposals">{t('memoryPage.proposalsLink')}</Link></p>
+      <div className="sr-only" role="status" aria-live="polite">{note}</div>
+      {fail && <p className="mt-help mt-help--err" role="alert" data-testid="memory-error">{fail}</p>}
+      {groups.length === 0 ? (
+        <EmptyState variant="first-run" icon="memory" title={t('memoryPage.emptyTitle')} body={t('memoryPage.emptyBody')} testId="memory-empty" />
+      ) : (
+        <>
+          {groups.map((g) => (
+            <section key={groupId(g)} className="mt-group" aria-labelledby={`mt-${groupId(g)}`} data-testid="memory-group" data-group={groupId(g)}>
+              <h3 className="mt-group__title" id={`mt-${groupId(g)}`}>{groupTitle(g, t)}</h3>
+              <Use group={g} t={t} />
+              <ul className="mt-files">
+                {g.files.map((f) => (
+                  <FileRow key={f.path} file={f} group={g} t={t} busy={busy} onDelete={remove} setError={setFail}
+                    onSaved={(file) => { setNote(t('memoryPage.saved', { name: file.name })); load() }} />
+                ))}
+              </ul>
+            </section>
+          ))}
+          <div className="mt-foot">
+            {clear ? (
+              <Callout tone="warn" role="alertdialog" testId="memory-clear-confirm"
+                actions={(
+                  <>
+                    <Button variant="danger" size="sm" autoFocus busy={busy} data-testid="memory-clear-yes" onClick={removeAll}>{t('memoryPage.clearYes', { count: total })}</Button>
+                    <Button variant="ghost" size="sm" onClick={() => setClear(false)}>{t('proposal.cancelEdit')}</Button>
+                  </>
+                )}
+              >{t('memoryPage.clearAsk', { count: total })}</Callout>
+            ) : (
+              <Button variant="danger" size="sm" icon="trash" disabled={busy} data-testid="memory-clear" onClick={() => setClear(true)}>{t('memoryPage.clear')}</Button>
+            )}
+          </div>
+        </>
+      )}
+    </div>
+  )
+}
diff --git a/core/http/react-ui/src/components/memorytab.css b/core/http/react-ui/src/components/memorytab.css
new file mode 100644
index 0000000000..fc26c0ba78
--- /dev/null
+++ b/core/http/react-ui/src/components/memorytab.css
@@ -0,0 +1,27 @@
+/* Settings > Memory: the context files of the prompt, with their sizes. */
+.mt-tab { display: grid; gap: var(--sp-4); max-width: 720px; }
+.mt-lede, .mt-limits { margin: 0; color: var(--dk-muted); font-size: var(--text-sm); }
+.mt-limits { font-size: var(--text-xs); }
+.mt-group { display: grid; gap: var(--sp-2); padding: var(--sp-4); border-radius: var(--dk-radius-2); background: var(--dk-card); box-shadow: inset 0 0 0 1px var(--dk-edge); }
+.mt-group__title { margin: 0; font-size: var(--text-md, 15px); color: var(--dk-text); overflow-wrap: anywhere; }
+.mt-use { display: flex; flex-wrap: wrap; align-items: center; gap: 4px var(--sp-3); margin: 0; font-size: var(--text-xs); color: var(--dk-muted); }
+.mt-use__bar { width: 120px; height: 6px; accent-color: var(--dk-accent); }
+.mt-use--over { color: var(--dk-error-text, var(--dk-error)); }
+.mt-use--over .mt-use__bar { accent-color: var(--dk-error); }
+.mt-files { margin: 0; padding: 0; list-style: none; display: grid; }
+.mt-file { border-top: 1px solid var(--dk-edge); }
+.mt-file__row { display: flex; align-items: center; gap: var(--sp-3); padding: 4px 0; }
+.mt-file__name { display: flex; align-items: center; gap: 6px; flex: 1 1 auto; min-width: 0; padding: 6px 0; border: 0; background: none; color: var(--dk-text); font: inherit; text-align: left; cursor: pointer; overflow-wrap: anywhere; }
+.mt-file__name:focus-visible { outline: 2px solid var(--focus-ring-color); outline-offset: 2px; border-radius: var(--dk-radius-1); }
+.mt-file__size { flex: none; color: var(--dk-muted); font-size: var(--text-xs); font-variant-numeric: tabular-nums; }
+.mt-file__acts { flex: none; display: flex; gap: 4px; }
+.mt-tag { padding: 0 6px; border-radius: var(--dk-radius-3); background: var(--dk-accent-wash); color: var(--dk-accent-text); font-size: var(--text-xs); }
+.mt-panel { display: grid; gap: var(--sp-2); padding: 0 0 var(--sp-3); }
+.mt-text { margin: 0; padding: var(--sp-3); max-height: 260px; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; border-radius: var(--dk-radius-2); background: var(--dk-inset); font-family: var(--font-mono); font-size: var(--text-xs); }
+.mt-edit { width: 100%; font-family: var(--font-mono); font-size: var(--text-xs); resize: vertical; }
+.mt-foot { display: flex; }
+.mt-edit { height: auto; padding: var(--sp-2) var(--sp-3); }
+.mt-help { margin: var(--sp-1) 0 var(--sp-2); font-size: var(--text-xs); color: var(--dk-muted); }
+.mt-help--err { color: var(--dk-error-text, var(--dk-error)); }
+.mt-acts { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
+.mt-panel .dk-label { display: block; margin-bottom: var(--sp-1); }
diff --git a/core/http/react-ui/src/pages/Account.jsx b/core/http/react-ui/src/pages/Account.jsx
index 344695f919..8727eeb965 100644
--- a/core/http/react-ui/src/pages/Account.jsx
+++ b/core/http/react-ui/src/pages/Account.jsx
@@ -9,6 +9,7 @@ import { timeUntil, initialOf } from '../utils/access'
 import { Button, Callout, EmptyState, LoadError, PageHeader, SkeletonRows, useLoad } from '../components/ui'
 import ApiKeysPanel from '../components/users/ApiKeysPanel'
 import { AboutYouTab, AppearanceTab } from '../components/wellknown/SettingsTabs'
+import MemoryTab from '../components/MemoryTab'
 import './access.css'
 
 const TABS = [
@@ -17,6 +18,7 @@ const TABS = [
   { id: 'keys', labelKey: 'account.tabs.apiKeys' },
   { id: 'usage', labelKey: 'account.tabs.usage' },
   { id: 'about', labelKey: 'account.tabs.about', files: true },
+  { id: 'memory', labelKey: 'account.tabs.memory', files: true },
   { id: 'appearance', labelKey: 'account.tabs.appearance', files: true },
 ]
 
@@ -298,6 +300,7 @@ export default function Account() {
         {tab === 'keys' && <ApiKeysPanel addToast={addToast} intro={t('keys.accountIntro')} />}
         {tab === 'usage' && <UsageTab />}
         {tab === 'about' && <AboutYouTab />}
+        {tab === 'memory' && <MemoryTab addToast={addToast} />}
         {tab === 'appearance' && <AppearanceTab />}
       </div>
     </div>