diff --git a/README.md b/README.md
index 8001a46..bd337c1 100644
--- a/README.md
+++ b/README.md
@@ -59,16 +59,7 @@ strategy Momentum {
## How Nano fits into your stack
-```mermaid
-flowchart LR
- source[".nano strategy"] --> compiler["Nano compiler"]
- compiler --> strategy_ir["StrategyGraph IR"]
- strategy_ir --> runtime["Reference runtime"]
- frame["Host MarketFrame
(timestamps + signals)"] --> runtime
- runtime --> intents["Intent(s) + ordered run log"]
- intents --> gate["Host DecisionGate"]
- gate --> decision["Decision record"]
-```
+
Nano owns parsing, IR validation, and deterministic reference evaluation. Your host owns data quality, policy, persistence, and any real-world action. The same graph and frame produce the same reference result; bridge replay is deterministic when the host gate is deterministic too.
diff --git a/assets/nano-governed-decision-flow.svg b/assets/nano-governed-decision-flow.svg
new file mode 100644
index 0000000..78511ac
--- /dev/null
+++ b/assets/nano-governed-decision-flow.svg
@@ -0,0 +1,68 @@
+