diff --git a/backend/main.py b/backend/main.py
index 1434278..08f5f7b 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -80,6 +80,7 @@ async def me(request: Request) -> dict:
     ip = client_ip(request)
     return {
         "user": current_user(request),
+        "common_space": settings.common_space,
         "local": auth.is_lan(ip),
         "authed": not auth.is_lan(ip)
         and bool(
@@ -140,8 +141,8 @@ async def list_notes(request: Request, _: None = Depends(require_access)):
 
 
 @app.get("/api/notes/recent")
-async def recent(_: None = Depends(require_access)):
-    return await notes.list_recent()
+async def recent(request: Request, _: None = Depends(require_access)):
+    return await notes.list_recent(current_user(request))
 
 
 @app.get("/api/notes/{note_id}")
diff --git a/backend/notes.py b/backend/notes.py
index 9beb97f..dca5997 100644
--- a/backend/notes.py
+++ b/backend/notes.py
@@ -243,15 +243,15 @@ async def list_notes(username: str, limit: int = 100) -> list[dict]:
         return notes
 
 
-async def list_recent(limit: int = 30) -> list[dict]:
+async def list_recent(username: str, limit: int = 30) -> list[dict]:
     async with aiosqlite.connect(settings.database_path) as db:
         db.row_factory = aiosqlite.Row
         rows = await db.execute(
             "SELECT n.id, n.title, n.updated_at, n.created_at, u.name AS username"
             " FROM notes n JOIN users u ON u.id = n.user_id"
-            " WHERE n.deleted_at IS NULL"
+            " WHERE n.deleted_at IS NULL AND u.name IN (?, ?)"
             " ORDER BY n.updated_at DESC LIMIT ?",
-            (limit,),
+            (username, settings.common_space, limit),
         )
         notes = [dict(r) for r in await rows.fetchall()]
         for note in notes:
diff --git a/static/app.css b/static/app.css
index 5e422a9..d9217d4 100644
--- a/static/app.css
+++ b/static/app.css
@@ -273,6 +273,23 @@ body {
 .note-meta { color: var(--muted); font-size: 12px; margin-top: 2px; }
 .note-tags { color: var(--primary); font-size: 12px; margin-top: 4px; }
 
+.note-common { border-left: 3px solid var(--secondary); }
+.common-badge {
+  display: inline-block;
+  background: color-mix(in srgb, var(--secondary) 18%, transparent);
+  color: var(--secondary);
+  border-radius: 10px;
+  padding: 0 7px;
+  font-size: 11px;
+  margin-right: 2px;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: .04em;
+}
+
+.common-toggle { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); cursor: pointer; }
+.common-toggle input { accent-color: var(--secondary); cursor: pointer; }
+
 .tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; }
 .tag-chip {
   background: color-mix(in srgb, var(--primary) 12%, transparent);
diff --git a/static/app.js b/static/app.js
index a805921..80856e1 100644
--- a/static/app.js
+++ b/static/app.js
@@ -6,7 +6,7 @@ const root = document.getElementById("root");
 const turndownService = new TurndownService({ headingStyle: "atx", codeBlockStyle: "fenced" });
 marked.setOptions({ gfm: true, breaks: false });
 
-const state = { user: null, local: true, authed: true, editor: null, noteId: null, view: "home", space: null, userNames: null };
+const state = { user: null, local: true, authed: true, editor: null, noteId: null, view: "home", space: null, userNames: null, commonSpace: "common", isCommon: false };
 
 const THEMES = [
   { id: "light", label: "Light", dark: false, dots: ["#f5f7fb", "#ffffff", "#3b82f6", "#8b5cf6"] },
@@ -157,6 +157,7 @@ async function boot() {
   try {
     const me = await api("GET", "/api/me");
     state.user = me.user; state.local = me.local; state.authed = me.authed;
+    state.commonSpace = me.common_space || "common";
   } catch { return; }
   if (!state.local && !state.authed) { showLogin(); return; }
   showHome();
@@ -230,7 +231,7 @@ function showHelp() {
       el("p", { html: 'Use the toolbar to format text with <b>bold</b>, <i>italic</i>, headings, quotes, code, and horizontal rules. The editor also accepts standard Markdown shortcuts as you type.' }),
 
       el("h2", { text: "Notes & sharing" }),
-      el("p", { html: 'Notes are plain Markdown files. A note lives in a <i>space</i> (a user), chosen with the dropdown at the top of the editor. Changing the space moves the note to that user.' }),
+      el("p", { html: 'Notes are plain Markdown files. A note lives in a <i>space</i> (a user), chosen with the dropdown at the top of the editor. Tick the <b>common</b> checkbox to save it to the shared space everyone can see. Changing the space moves the note to that user.' }),
       el("p", { html: 'Use <b>Attach</b> to upload a file and insert a link to it. <b>History</b> shows every change, and <b>Delete</b> soft-deletes a note.' }),
     ]),
   ]);
@@ -366,6 +367,7 @@ async function populateUsers() {
   const names = users.map((u) => u.name);
   state.userNames = names;
   for (const n of names) {
+    if (n === state.commonSpace) continue;
     sel.appendChild(el("option", { value: n, text: n }));
   }
   sel.value = state.user;
@@ -402,9 +404,13 @@ function noteList(notes) {
   const ul = el("ul", { class: "note-list" });
   for (const n of notes) {
     const tags = (n.tags || []).map((t) => `#${t}`).join(" ");
-    ul.appendChild(el("li", { class: "note-item", onclick: () => openNote(n.id) }, [
+    const isCommon = n.username === state.commonSpace;
+    const meta = el("div", { class: "note-meta" });
+    if (isCommon) meta.appendChild(el("span", { class: "common-badge", text: "common" }));
+    meta.appendChild(document.createTextNode(`${n.username} · ${relTime(n.updated_at)}`));
+    ul.appendChild(el("li", { class: isCommon ? "note-item note-common" : "note-item", onclick: () => openNote(n.id) }, [
       el("div", { class: "note-title", text: n.title || "Untitled" }),
-      el("div", { class: "note-meta", text: `${n.username} · ${relTime(n.updated_at)}` }),
+      meta,
       el("div", { class: "note-tags", text: tags }),
     ]));
   }
@@ -466,13 +472,21 @@ function renderEditor(body, owner) {
   const del = state.noteId ? el("button", { class: "btn danger", text: "Delete", onclick: deleteNote }) : null;
   const hist = state.noteId ? el("button", { class: "btn ghost", text: "History", onclick: showHistory }) : null;
 
+  const realUsers = (state.userNames || [state.user]).filter((n) => n !== state.commonSpace);
   const spaceSel = el("select", { id: "space-select", class: "user-select", onchange: (e) => { state.space = e.target.value; } });
-  for (const n of (state.userNames || [state.user])) {
+  for (const n of realUsers) {
     spaceSel.appendChild(el("option", { value: n, text: n }));
   }
-  const initialSpace = owner || state.space || state.user;
-  spaceSel.value = initialSpace;
-  state.space = initialSpace;
+  state.isCommon = owner === state.commonSpace;
+  state.space = owner && owner !== state.commonSpace ? owner : (state.user || realUsers[0]);
+  spaceSel.value = state.space;
+
+  const commonCb = el("input", { type: "checkbox", id: "common-check" });
+  commonCb.checked = state.isCommon;
+  commonCb.addEventListener("change", () => { state.isCommon = commonCb.checked; });
+  const commonLabel = el("label", { class: "common-toggle", title: "Save to the shared common space" }, [
+    commonCb, el("span", { text: "common" }),
+  ]);
 
   const toolbar = el("div", { class: "toolbar" }, [
     toolbarBtn("B", "bold"), toolbarBtn("I", "italic"),
@@ -494,7 +508,7 @@ function renderEditor(body, owner) {
   const attach = el("button", { class: "btn", text: "Attach", onclick: () => fileInput.click() });
 
   const wrap = el("div", { class: "editor-wrap" }, [
-    el("div", { class: "editor-topbar" }, [back, spaceSel, el("div", { class: "spacer" }), attach, hist, del, save]),
+    el("div", { class: "editor-topbar" }, [back, spaceSel, el("div", { class: "spacer" }), attach, hist, del, commonLabel, save]),
     toolbar,
     editorArea,
     hint,
@@ -538,13 +552,14 @@ function runToolbar(action) {
 async function persistNote() {
   const html = state.editor.getHTML();
   const body = turndownService.turndown(html);
+  const username = state.isCommon ? state.commonSpace : state.space;
   const status = document.querySelector(".status");
   try {
     let note;
     if (state.noteId) {
-      note = await api("PUT", "/api/notes/" + state.noteId, { body, username: state.space });
+      note = await api("PUT", "/api/notes/" + state.noteId, { body, username });
     } else {
-      note = await api("POST", "/api/notes", { body, username: state.space });
+      note = await api("POST", "/api/notes", { body, username });
       state.noteId = note.id;
     }
     state.editor.commands.setContent(marked.parse(note.body));
@@ -574,7 +589,7 @@ async function uploadAttachment(input) {
   if (!file) return;
   const fd = new FormData();
   fd.append("file", file);
-  fd.append("username", state.space);
+  fd.append("username", state.isCommon ? state.commonSpace : state.space);
   const status = document.querySelector(".status");
   try {
     const resp = await fetch("/api/attachments", { method: "POST", body: fd });