diff --git a/packages/core/sdk/src/artifact.ts b/packages/core/sdk/src/artifact.ts
index af9a8ba068..56f9c6ed1c 100644
--- a/packages/core/sdk/src/artifact.ts
+++ b/packages/core/sdk/src/artifact.ts
@@ -5,8 +5,8 @@
 //
 // An artifact IS the stored JSX source plus the title/description an agent
 // matches against ("show me my active users dashboard"). Owner-scoped like a
-// connection: created at the `user` tier, readable through the same owner
-// policy, so org-tier sharing later needs no new machinery.
+// connection, and created at the `org` tier so every member of the tenant can
+// read it through the same owner policy.
 // ---------------------------------------------------------------------------
 
 import { Option, Schema, type Effect } from "effect";
diff --git a/packages/core/sdk/src/artifacts.test.ts b/packages/core/sdk/src/artifacts.test.ts
index d07a56fbc5..e875f8428b 100644
--- a/packages/core/sdk/src/artifacts.test.ts
+++ b/packages/core/sdk/src/artifacts.test.ts
@@ -1,9 +1,11 @@
 import { describe, expect, it } from "@effect/vitest";
 import { Effect, Predicate, Result } from "effect";
+import { withQueryContext } from "@executor-js/fumadb/query";
 
-import { makeTestExecutor } from "./testing";
+import { createExecutor } from "./executor";
+import { makeTestExecutor, makeTestWorkspaceHarness } from "./testing";
 import type { ArtifactBinding } from "./artifact";
-import { ConnectionName, IntegrationSlug } from "./ids";
+import { ConnectionName, IntegrationSlug, Subject, Tenant } from "./ids";
 
 const binding = (integration: string, owner: "user" | "org", name: string): ArtifactBinding => ({
   integration: IntegrationSlug.make(integration),
@@ -34,7 +36,7 @@ describe("executor.artifacts", () => {
         code: CODE,
       });
       expect(saved.id).not.toBe("");
-      expect(saved.owner).toBe("user");
+      expect(saved.owner).toBe("org");
       expect(saved.title).toBe("Active users");
       expect(saved.description).toBe("Daily active users over time");
       expect(saved.code).toBe(CODE);
@@ -123,7 +125,7 @@ describe("executor.artifacts", () => {
       expect(listed).toEqual([
         {
           id: saved.id,
-          owner: "user",
+          owner: "org",
           title: "Active users",
           description: "described",
           preview: null,
@@ -250,16 +252,55 @@ describe("executor.artifacts", () => {
     }),
   );
 
-  it.effect("an executor with no subject cannot save a user artifact", () =>
+  it.effect("an executor with no subject can save an artifact", () =>
     Effect.gen(function* () {
-      // Pure-org executors (host request paths with no member bound) have no
-      // user partition to file a personal artifact into.
       const executor = yield* makeTestExecutor({ subject: null });
-      const result = yield* Effect.result(executor.artifacts.save({ title: "Orphan", code: CODE }));
-      expect(Result.isFailure(result)).toBe(true);
+      const saved = yield* executor.artifacts.save({ title: "Shared", code: CODE });
+      expect(saved.owner).toBe("org");
+      expect((yield* executor.artifacts.list()).map((a) => a.title)).toEqual(["Shared"]);
     }),
   );
 
+  it.effect("another member of the tenant can open, rename and delete a saved artifact", () =>
+    Effect.gen(function* () {
+      const { config, executor: alice } = yield* makeTestWorkspaceHarness();
+      const bob = yield* createExecutor({
+        ...config,
+        subject: Subject.make("bob"),
+        db: withQueryContext(config.testDb.db, { tenant: String(config.tenant), subject: "bob" }),
+      });
+      yield* Effect.addFinalizer(() => bob.close().pipe(Effect.ignore));
+
+      const saved = yield* alice.artifacts.save({ title: "Revenue", code: CODE });
+
+      expect((yield* bob.artifacts.list()).map((a) => a.title)).toEqual(["Revenue"]);
+      expect((yield* bob.artifacts.get(saved.id)).code).toBe(CODE);
+
+      yield* bob.artifacts.rename({ id: saved.id, title: "Revenue by month" });
+      expect((yield* alice.artifacts.get(saved.id)).title).toBe("Revenue by month");
+
+      yield* bob.artifacts.remove({ id: saved.id });
+      expect(yield* alice.artifacts.list()).toEqual([]);
+    }).pipe(Effect.scoped),
+  );
+
+  it.effect("another tenant cannot see a saved artifact", () =>
+    Effect.gen(function* () {
+      const { config, executor: alice } = yield* makeTestWorkspaceHarness();
+      const outsider = yield* createExecutor({
+        ...config,
+        tenant: Tenant.make("other-tenant"),
+        subject: Subject.make("mallory"),
+        db: withQueryContext(config.testDb.db, { tenant: "other-tenant", subject: "mallory" }),
+      });
+      yield* Effect.addFinalizer(() => outsider.close().pipe(Effect.ignore));
+
+      yield* alice.artifacts.save({ title: "Revenue", code: CODE });
+
+      expect(yield* outsider.artifacts.list()).toEqual([]);
+    }).pipe(Effect.scoped),
+  );
+
   describe("previews", () => {
     const MARKUP = '<div class="p-4"><h2>Revenue</h2></div>';
     const SETTLED = '<div class="p-4"><h2>Revenue</h2><p>12,480 active</p></div>';
diff --git a/packages/core/sdk/src/core-schema.ts b/packages/core/sdk/src/core-schema.ts
index 65aecda3ee..0593c4f2f7 100644
--- a/packages/core/sdk/src/core-schema.ts
+++ b/packages/core/sdk/src/core-schema.ts
@@ -393,9 +393,8 @@ export const coreTables = defineTables({
 
   // A saved generative-UI artifact — the JSX source a model produced, kept so
   // it can be re-rendered later and matched by title/description from any MCP
-  // client. Owner-scoped like every other personal row: artifacts are created
-  // at the `user` tier, and the `org` tier the table already carries is what
-  // sharing will use later without new machinery.
+  // client. Owner-scoped like every other row: new artifacts are created at
+  // the `org` tier, so they are shared with the whole tenant.
   artifact: ownedExecutorTable(
     "artifact",
     {
diff --git a/packages/core/sdk/src/executor.ts b/packages/core/sdk/src/executor.ts
index ad14303dd3..f544b97988 100644
--- a/packages/core/sdk/src/executor.ts
+++ b/packages/core/sdk/src/executor.ts
@@ -6705,9 +6705,9 @@ export const createExecutor = <const TPlugins extends readonly AnyPlugin[] = rea
     // ------------------------------------------------------------------
 
     // Reads take no explicit owner: the owner policy already narrows to the
-    // rows this binding may see (org rows plus this subject's own), which is
-    // exactly "visible to the bound owner scope" and stays correct unchanged
-    // when org-tier sharing lands. Writes are always `user` tier in v1.
+    // rows this binding may see (org rows plus this subject's own). New
+    // artifacts are created at the `org` tier, so every member of the tenant
+    // can open, edit and delete them; older `user`-tier rows stay personal.
     const artifactById =
       (id: string): CoreWhere =>
       (b: AnyCb) =>
@@ -6836,9 +6836,8 @@ export const createExecutor = <const TPlugins extends readonly AnyPlugin[] = rea
           yield* core.updateMany("artifact", { where, set });
           return rowToArtifact({ ...existing, ...set });
         }
-        yield* requireUserSubject("user");
         const keys = yield* Effect.try({
-          try: () => ownedKeys("user"),
+          try: () => ownedKeys("org"),
           catch: (cause) => storageFailureFromUnknown("invalid owner", cause),
         });
         const created = yield* core.create("artifact", {