diff --git a/ROADMAP.md b/ROADMAP.md
index 9249642..480b413 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -61,6 +61,9 @@ external interfaces. See `docs/architecture/structure.canvas` → *Backend – M
 Rust, optimised for throughput. Executes nodes and distributes them across workers. See
 `docs/architecture/structure.canvas` → *Backend – Processing*.
 
+- [ ] Parallel invocation of stateless nodes over independent input sets, to
+      keep I/O delay minimal (stateful I/O nodes keep serializing via the
+      `synchronous` mechanism)
 - [ ] Extract node execution from the Python prototype into a Rust engine
 - [ ] Worker distribution and load balancing across capable devices
 - [ ] Input/output validation at the node boundary