diff --git a/frontend/src/lib/components/copilot/chat/global/core.test.ts b/frontend/src/lib/components/copilot/chat/global/core.test.ts
index cd71a547a4..2d4eb2bec5 100644
--- a/frontend/src/lib/components/copilot/chat/global/core.test.ts
+++ b/frontend/src/lib/components/copilot/chat/global/core.test.ts
@@ -2671,6 +2671,26 @@ describe('global AI tools', () => {
 		}
 	})
 
+	// Whether something is deployed at the path is what says whether a draft staged under
+	// that name is the one addressed. Unanswered, a delete would fall through to the
+	// namesake and remove an unrelated draft.
+	it('stops a delete when it cannot tell whether the path is a deployed item', async () => {
+		seedBackendDraft(
+			'raw_app',
+			'u/admin/draft_unreachable_probe',
+			{ summary: 'Namesake', draft_path: 'f/sales/flaky_app', files: {}, runnables: {} },
+			{ workspace: WORKSPACE }
+		)
+		vi.mocked(AppService.existsApp).mockRejectedValue(new Error('server error'))
+
+		await expect(
+			callGlobalTool('delete_workspace_item', { type: 'app', path: 'f/sales/flaky_app' })
+		).rejects.toThrow(/Could not tell whether/)
+		expect(
+			getBackendDraft('raw_app', 'u/admin/draft_unreachable_probe', { workspace: WORKSPACE })
+		).toBeDefined()
+	})
+
 	it('refuses a draft_path that two drafts are staged under', async () => {
 		for (const storage of ['u/admin/draft_a', 'u/admin/draft_b']) {
 			seedBackendDraft(
diff --git a/frontend/src/lib/components/copilot/chat/global/userDraftAdapter.ts b/frontend/src/lib/components/copilot/chat/global/userDraftAdapter.ts
index c52ec98b21..62b06d09fd 100644
--- a/frontend/src/lib/components/copilot/chat/global/userDraftAdapter.ts
+++ b/frontend/src/lib/components/copilot/chat/global/userDraftAdapter.ts
@@ -314,15 +314,15 @@ export function chosenDraftName(itemKind: UserDraftItemKind, value: unknown): st
 }
 
 /**
- * The kinds an editor can stage a name for: a flow and a raw app write `draft_path`, a
- * script renames the value's own `path`. A resource, variable, schedule or trigger draft
- * is only ever stored at its own path, so a failed drafts listing withholds nothing a
- * write of one needed.
+ * Deployed-existence probe per kind that can be stored under a name other than its path: a
+ * flow and a raw app stage one in `draft_path`, a script renames the value's own `path`. A
+ * resource, variable, schedule or trigger draft only ever lives at its own path.
+ *
+ * Being nameable and having a probe is the same property — a draft can only be staged under
+ * a name some deployed item might also hold — so the set below is derived from these keys
+ * rather than repeated. Listing a kind here without a probe would let a draft staged under a
+ * deployed item's name win that name, inverting the rule the resolution is built on.
  */
-const NAMEABLE_DRAFT_KINDS: ReadonlySet<UserDraftItemKind> = new Set(['script', 'flow', 'raw_app'])
-
-/** Deployed-existence probe per nameable kind — the same three kinds, since only an item
- * that can be deployed can leave a draft staged under its old name. */
 const deployedExists: Partial<
 	Record<UserDraftItemKind, (workspace: string, path: string) => Promise<boolean>>
 > = {
@@ -331,6 +331,10 @@ const deployedExists: Partial<
 	raw_app: (workspace, path) => AppService.existsApp({ workspace, path })
 }
 
+const NAMEABLE_DRAFT_KINDS: ReadonlySet<UserDraftItemKind> = new Set(
+	Object.keys(deployedExists) as UserDraftItemKind[]
+)
+
 /** What a path resolved to: where the draft is stored, and its value when reaching it
  * already fetched one, so a read does not ask for the same draft twice. */
 type ResolvedDraft = { storagePath: string; value?: unknown }