diff --git a/package.json b/package.json
index 957406f..3421cc8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@profullstack/readm3",
-  "version": "0.27.0",
+  "version": "0.27.1",
   "description": "Markdown editing and sharing for people and teams. Web/PWA, CLI, API and MCP with version history, view/edit links, and a terminal reader.",
   "type": "module",
   "license": "MIT",
diff --git a/server/operations.ts b/server/operations.ts
index faa9842..966a9c2 100644
--- a/server/operations.ts
+++ b/server/operations.ts
@@ -65,11 +65,11 @@ export function operate(
         ),
       };
     case "organizations_list":
+      // Only the caller's own memberships, admins included: a site admin must not
+      // see (or share into) other people's workspaces.
       return store.all(
-        user.admin
-          ? "SELECT o.*,'owner' AS role FROM organizations o ORDER BY o.createdAt DESC"
-          : "SELECT o.*,m.role FROM organizations o JOIN members m ON m.orgId=o.id WHERE m.userId=? ORDER BY o.createdAt DESC",
-        ...(user.admin ? [] : [user.id]),
+        "SELECT o.*,m.role FROM organizations o JOIN members m ON m.orgId=o.id WHERE m.userId=? ORDER BY o.createdAt DESC",
+        user.id,
       );
     case "organizations_create": {
       const org = {
@@ -328,12 +328,9 @@ export function operate(
       return { ok: true };
     }
     case "documents_list": {
-      const accessible = user.admin
-        ? "1=1"
-        : `(d.ownerId=? OR EXISTS (SELECT 1 FROM permissions p WHERE p.documentId=d.id AND p.userId=?) OR (d.access!='private' AND EXISTS (SELECT 1 FROM members m WHERE m.orgId=d.orgId AND m.userId=?) AND (d.teamId IS NULL OR EXISTS (SELECT 1 FROM team_members tm WHERE tm.teamId=d.teamId AND tm.userId=?))))`;
-      const values: string[] = user.admin
-        ? []
-        : [user.id, user.id, user.id, user.id];
+      // Same rule for everyone: owned, granted, or visible through membership.
+      const accessible = `(d.ownerId=? OR EXISTS (SELECT 1 FROM permissions p WHERE p.documentId=d.id AND p.userId=?) OR (d.access!='private' AND EXISTS (SELECT 1 FROM members m WHERE m.orgId=d.orgId AND m.userId=?) AND (d.teamId IS NULL OR EXISTS (SELECT 1 FROM team_members tm WHERE tm.teamId=d.teamId AND tm.userId=?))))`;
+      const values: string[] = [user.id, user.id, user.id, user.id];
       if (args.orgId) values.push(orgId());
       if (args.search) values.push(text(args.search, "Search"));
       const docs = store.all<Doc>(
diff --git a/server/store.ts b/server/store.ts
index 3fd1401..cfa8ab6 100644
--- a/server/store.ts
+++ b/server/store.ts
@@ -225,12 +225,12 @@ export class Store {
     );
     return { id: sessionId, token, expiresAt, label };
   }
+  /**
+   * The caller's role in an organization: membership only. Site admins get no
+   * standing in other people's workspaces; admin powers live on the admin_*
+   * operations, which check user.admin themselves.
+   */
   orgRole(user: User, orgId: string) {
-    if (
-      user.admin &&
-      this.get("SELECT id FROM organizations WHERE id=?", orgId)
-    )
-      return "owner";
     return this.get<{ role: string }>(
       "SELECT role FROM members WHERE orgId=? AND userId=?",
       orgId,
@@ -252,7 +252,7 @@ export class Store {
     doc: Doc,
     shareToken?: string,
   ): "owner" | "edit" | "view" | null {
-    if (user && (user.admin || user.id === doc.ownerId)) return "owner";
+    if (user && user.id === doc.ownerId) return "owner";
     let role: "edit" | "view" | null = null;
     if (user) {
       role =
@@ -332,7 +332,6 @@ export class Store {
     if (!this.get("SELECT id FROM teams WHERE id=? AND orgId=?", teamId, orgId))
       throw new HttpError(400, "Team must belong to this organization.");
     if (
-      !user.admin &&
       this.orgRole(user, orgId) !== "owner" &&
       !this.get(
         "SELECT userId FROM team_members WHERE teamId=? AND userId=?",
diff --git a/server/test/sharing.test.ts b/server/test/sharing.test.ts
index 9f74fc4..70adc8a 100644
--- a/server/test/sharing.test.ts
+++ b/server/test/sharing.test.ts
@@ -437,7 +437,7 @@ test("pinned versions stay immutable, restore adds history, and deletion invalid
   }
 });
 
-test("the one-time super-admin claim is secret gated and grants access across all owners", async () => {
+test("the one-time super-admin claim is secret gated and gives no access to other people's workspaces", async () => {
   const before = process.env.READM3_ADMIN_BOOTSTRAP_SECRET;
   process.env.READM3_ADMIN_BOOTSTRAP_SECRET = "test-admin-" + id();
   const f = fixture();
@@ -470,10 +470,14 @@ test("the one-time super-admin claim is secret gated and grants access across al
       ).status,
     ).toBe(409);
     expect((await admin.action("admin_users")).data).toHaveLength(2);
+    // Admin is a site role, not a key to everyone's workspace.
+    const orgs = (await admin.action("organizations_list")).data;
+    expect(orgs.map((o: { id: string }) => o.id)).not.toContain(first.org.id);
+    const docs = (await admin.action("documents_list", {})).data;
+    expect(docs.map((d: { id: string }) => d.id)).not.toContain(doc.id);
     expect(
-      (await admin.action("documents_get", { documentId: doc.id })).data
-        .canManage,
-    ).toBe(true);
+      (await admin.action("documents_get", { documentId: doc.id })).status,
+    ).not.toBe(200);
     expect(
       (
         await admin.action("documents_update", {
@@ -482,10 +486,23 @@ test("the one-time super-admin claim is secret gated and grants access across al
           source: "# Moderated",
         })
       ).status,
-    ).toBe(200);
+    ).not.toBe(200);
     expect(
       (await admin.action("documents_delete", { documentId: doc.id })).status,
-    ).toBe(200);
+    ).not.toBe(200);
+    expect(
+      (
+        await admin.action("documents_create", {
+          orgId: first.org.id,
+          title: "Pushed.md",
+          source: "# Into someone else's workspace",
+        })
+      ).status,
+    ).toBe(403);
+    expect(
+      (await first.action("documents_get", { documentId: doc.id })).data.version
+        .source,
+    ).toBe("# Private");
   } finally {
     f.store.close();
     if (before === undefined) delete process.env.READM3_ADMIN_BOOTSTRAP_SECRET;
diff --git a/site/test/sharing.spec.ts b/site/test/sharing.spec.ts
index 3bbf6a8..3e08870 100644
--- a/site/test/sharing.spec.ts
+++ b/site/test/sharing.spec.ts
@@ -229,7 +229,7 @@ test("revoked links stop working and cloud documents never enter the offline wor
   }
 });
 
-test("super-admin setup grants the account administration of another user's private file", async ({
+test("super-admin setup gives no access to another user's private file", async ({
   page,
   context,
   browser,
@@ -244,18 +244,15 @@ test("super-admin setup grants the account administration of another user's priv
     await register(context, "superadmin_" + suffix());
     await page.goto("/admin#claim=browser-test-admin-secret");
     await expect(page.locator("#account-label")).toContainText("Super admin");
+    // Admin is a site role, not a key to other people's workspaces.
     await expect(
-      page.getByRole("link", { name: "Project plan.md" }).first(),
-    ).toBeVisible();
+      page.getByRole("link", { name: "Project plan.md" }),
+    ).toHaveCount(0);
     await page.goto(`/viewer?doc=${doc.id}`);
-    await expect(page.locator("#edit-mode")).toBeEnabled();
-    await expect(page.locator("#share")).toBeVisible();
-    await page.locator("#edit-mode").click();
-    await editorInput(page).fill("# Super-admin correction");
-    await page.locator("#cloud-save").click();
-    await expect(page.locator("#save-status")).toHaveText(
-      "Version saved online",
+    await expect(page.locator("body")).toContainText(
+      "if this file is private",
     );
+    await expect(page.locator("#cloud-save")).toBeHidden();
   } finally {
     await other.close();
   }
diff --git a/src/cli.ts b/src/cli.ts
index 60cc95b..506aa8c 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -12,7 +12,7 @@ import { run, type ViewerOptions } from "./viewer.ts";
 import { isCloudCommand, cloudMain, CLOUD_USAGE } from "./cloud-cli.ts";
 import { isDesktopCommand, desktopMain, installedDesktop, prefersDesktop, DESKTOP_USAGE } from "./desktop-cli.ts";
 
-export const VERSION = "0.27.0";
+export const VERSION = "0.27.1";
 
 /** The help text, exported so a test can hold it to the flags it documents. */
 export const USAGE = `readm3 — a plain text editor for Markdown and code