diff --git a/crates/aura-cli/src/main.rs b/crates/aura-cli/src/main.rs
index 31e5fe5..509c906 100644
--- a/crates/aura-cli/src/main.rs
+++ b/crates/aura-cli/src/main.rs
@@ -5,6 +5,11 @@
 //! signal-quality harness (synthetic source → SMA-cross → Exposure → SimBroker →
 //! recording sinks), runs it deterministically (C1), and prints the run's
 //! metrics + manifest (#6) as canonical JSON to stdout (the headline C14 move).
+//!
+//! `aura run --real <SYMBOL> [--from <ms>] [--to <ms>]` feeds that same harness
+//! real M1 close bars, streamed lazily from the local data-server archive through
+//! the #71 Source seam (`M1FieldSource`) instead of the synthetic stream — the
+//! first real-data backtest from the CLI.
 
 mod render;