diff --git a/loop/agent.go b/loop/agent.go
index 82d823e..82c3268 100644
--- a/loop/agent.go
+++ b/loop/agent.go
@@ -159,6 +159,9 @@
 
 	// GetPorts returns the cached list of open TCP ports
 	GetPorts() []portlist.Port
+
+	// TokenContextWindow returns the TokenContextWindow size of the model the agent is using.
+	TokenContextWindow() int
 }
 
 type CodingAgentMessageType string
@@ -468,6 +471,11 @@
 	outstandingToolCalls map[string]string
 }
 
+// TokenContextWindow implements CodingAgent.
+func (a *Agent) TokenContextWindow() int {
+	return a.config.Service.TokenContextWindow()
+}
+
 // NewIterator implements CodingAgent.
 func (a *Agent) NewIterator(ctx context.Context, nextMessageIdx int) MessageIterator {
 	a.mu.Lock()