diff --git a/webapp/src/lib/rpc.test.ts b/webapp/src/lib/rpc.test.ts
index 07c59112..9d96cfa8 100644
--- a/webapp/src/lib/rpc.test.ts
+++ b/webapp/src/lib/rpc.test.ts
@@ -29,6 +29,30 @@ test('rpc posts the envelope to /proxy/rpc with target + bearer headers and unwr
   expect(sent.id).toMatch(/^ui-\d+$/)
 })
 
+test('rpc unwraps the {items} envelope for kb.list_* results', async () => {
+  mockFetch(200, { id: 'x', ok: true, result: { items: [{ id: 'a' }, { id: 'b' }], _meta: { deprecation: {} } } })
+  const out = await rpc<{ id: string }[]>(conn, 'kb.list_pending')
+  expect(out).toEqual([{ id: 'a' }, { id: 'b' }])
+})
+
+test('rpc passes a bare-array kb.list_* result through unchanged (old server)', async () => {
+  mockFetch(200, { id: 'x', ok: true, result: [{ id: 'a' }] })
+  const out = await rpc<{ id: string }[]>(conn, 'kb.list_claims')
+  expect(out).toEqual([{ id: 'a' }])
+})
+
+test('rpc leaves kb.list_sessions {sessions} envelope untouched', async () => {
+  mockFetch(200, { id: 'x', ok: true, result: { sessions: [{ session_id: 's1' }] } })
+  const out = await rpc<{ sessions: { session_id: string }[] }>(conn, 'kb.list_sessions')
+  expect(out).toEqual({ sessions: [{ session_id: 's1' }] })
+})
+
+test('rpc does not unwrap items for non-list methods', async () => {
+  mockFetch(200, { id: 'x', ok: true, result: { items: [1, 2, 3] } })
+  const out = await rpc<{ items: number[] }>(conn, 'kb.synthesize')
+  expect(out).toEqual({ items: [1, 2, 3] })
+})
+
 test('rpc omits authorization header when no token', async () => {
   const fn = mockFetch(200, { id: 'x', ok: true, result: {} })
   await rpc({ endpoint: 'http://127.0.0.1:8731' }, 'kb.status')
diff --git a/webapp/src/lib/rpc.ts b/webapp/src/lib/rpc.ts
index c3ee7d00..fb73f731 100644
--- a/webapp/src/lib/rpc.ts
+++ b/webapp/src/lib/rpc.ts
@@ -44,7 +44,28 @@ export async function rpc<T>(
   if (!body.ok || body.error) {
     throw new VouchRpcError(body.error?.code ?? 'unknown', body.error?.message ?? 'unknown error')
   }
-  return body.result as T
+  return unwrapListEnvelope(method, body.result) as T
+}
+
+/**
+ * `kb.list_*` results moved from a bare array to a `{ items, _meta }` dict
+ * envelope (server deprecation, remove_in 1.4.0). Consumers still type these
+ * as flat arrays, so unwrap `items` here and keep tolerating the old shape —
+ * one place, so the fan-out, optimistic caches, and views are untouched.
+ * `kb.list_sessions` keeps its own `{ sessions }` key and has no `items`, so it
+ * passes through unchanged.
+ */
+function unwrapListEnvelope<T>(method: string, result: T): T {
+  if (
+    method.startsWith('kb.list_') &&
+    result !== null &&
+    typeof result === 'object' &&
+    !Array.isArray(result) &&
+    Array.isArray((result as { items?: unknown }).items)
+  ) {
+    return (result as unknown as { items: T }).items
+  }
+  return result
 }
 
 export async function fetchHealth(conn: VouchConnectionInfo): Promise<boolean> {