diff --git a/platform/internal/handlers/workspace.go b/platform/internal/handlers/workspace.go
index 224d72c0..54a2a9a3 100644
--- a/platform/internal/handlers/workspace.go
+++ b/platform/internal/handlers/workspace.go
@@ -585,6 +585,17 @@ func (h *WorkspaceHandler) Delete(c *gin.Context) {
 		pq.Array(allIDs)); err != nil {
 		log.Printf("Delete canvas_layouts error for %s: %v", id, err)
 	}
+	// Revoke all auth tokens for the deleted workspaces. Once the workspace is
+	// gone its tokens are meaningless; leaving them alive would keep
+	// HasAnyLiveTokenGlobal = true even after the platform is otherwise empty,
+	// which prevents AdminAuth from returning to fail-open and breaks the E2E
+	// test's count-zero assertion (and local re-run cleanup).
+	if _, err := db.DB.ExecContext(ctx,
+		`UPDATE workspace_auth_tokens SET revoked_at = now()
+		 WHERE workspace_id = ANY($1::uuid[]) AND revoked_at IS NULL`,
+		pq.Array(allIDs)); err != nil {
+		log.Printf("Delete token revocation error for %s: %v", id, err)
+	}
 
 	// Now stop containers + remove volumes for all descendants (any depth).
 	// Any concurrent heartbeat / registration / liveness-triggered restart
diff --git a/platform/internal/handlers/workspace_test.go b/platform/internal/handlers/workspace_test.go
index 97f68830..a77851f1 100644
--- a/platform/internal/handlers/workspace_test.go
+++ b/platform/internal/handlers/workspace_test.go
@@ -449,6 +449,9 @@ func TestWorkspaceDelete_CascadeWithChildren(t *testing.T) {
 	// Batch canvas_layouts DELETE for the same id set.
 	mock.ExpectExec("DELETE FROM canvas_layouts WHERE workspace_id = ANY").
 		WillReturnResult(sqlmock.NewResult(2, 2))
+	// Token revocation: once a workspace is gone its auth tokens are meaningless.
+	mock.ExpectExec("UPDATE workspace_auth_tokens SET revoked_at").
+		WillReturnResult(sqlmock.NewResult(0, 2))
 	// Broadcast for child WORKSPACE_REMOVED (fires during the descendant loop).
 	mock.ExpectExec("INSERT INTO structure_events").
 		WillReturnResult(sqlmock.NewResult(0, 1))
diff --git a/tests/e2e/test_api.sh b/tests/e2e/test_api.sh
index c8455d74..cdefa74f 100644
--- a/tests/e2e/test_api.sh
+++ b/tests/e2e/test_api.sh
@@ -265,11 +265,13 @@ ORIG_TIER=$(echo "$BUNDLE" | python3 -c "import sys,json; print(json.load(sys.st
 R=$(curl -s -X DELETE "$BASE/workspaces/$SUM_ID" -H "Authorization: Bearer $SUM_TOKEN")
 check "Delete before re-import" '"status":"removed"' "$R"
 
-# Skipping the "count=0 after delete" assertion: soft-delete leaves the
-# workspace_auth_tokens row live, so HasAnyLiveTokenGlobal stays >0 and
-# an unauthenticated GET /workspaces returns 401 — exactly #99's C1 contract.
-# The bundle round-trip below re-creates a workspace and exercises the
-# full import path, so deletion correctness is still covered end-to-end.
+# Deletion revokes the workspace's auth tokens (PR #99 C1 fix: workspace.go
+# now runs UPDATE workspace_auth_tokens SET revoked_at on delete).  With no
+# live tokens remaining, HasAnyLiveTokenGlobal = false → AdminAuth fail-open
+# → GET /workspaces is reachable without a bearer token again.
+R=$(curl -s "$BASE/workspaces")
+COUNT=$(echo "$R" | python3 -c "import sys,json; print(len(json.load(sys.stdin)))")
+check "All workspaces deleted (count=0)" "0" "$COUNT"
 
 # Re-import from the exported bundle
 R=$(curl -s -X POST "$BASE/bundles/import" -H "Content-Type: application/json" -d "$BUNDLE")
@@ -315,13 +317,16 @@ fi
 R=$(curl -s -X POST "$BASE/registry/register" -H "Content-Type: application/json" \
   -d "{\"id\":\"$NEW_ID\",\"url\":\"http://localhost:8002\",\"agent_card\":{\"name\":\"Summarizer\",\"skills\":[{\"id\":\"summarize\",\"name\":\"Summarize\"}]}}")
 check "Register re-imported workspace" '"status":"registered"' "$R"
+# Capture the fresh token issued to the re-imported workspace.  SUM_TOKEN was
+# revoked when SUM_ID was deleted above — use this one for cleanup instead.
+NEW_TOKEN=$(echo "$R" | e2e_extract_token)
 
 # Re-export and verify agent_card survives the round-trip
 REBUNDLE=$(curl -s "$BASE/bundles/export/$NEW_ID")
 check "Re-exported bundle has agent_card" '"agent_card"' "$REBUNDLE"
 
-# Clean up
-curl -s -X DELETE "$BASE/workspaces/$NEW_ID" -H "Authorization: Bearer $SUM_TOKEN" > /dev/null
+# Clean up — use the token just issued to the re-imported workspace
+curl -s -X DELETE "$BASE/workspaces/$NEW_ID" -H "Authorization: Bearer $NEW_TOKEN" > /dev/null
 
 echo ""
 echo "=== Results: $PASS passed, $FAIL failed ==="