diff --git a/pkg/routing/classifier.go b/pkg/routing/classifier.go
index 761a6fdec..8cddaf069 100644
--- a/pkg/routing/classifier.go
+++ b/pkg/routing/classifier.go
@@ -71,7 +71,7 @@ func (c *RuleClassifier) Score(f Features) float64 {
 		score += 0.10
 	}
 
-	// Cap at 1.0 to honour the [0, 1] contract even when multiple signals fire
+	// Cap at 1.0 to honor the [0, 1] contract even when multiple signals fire
 	// simultaneously (e.g., long message + code block + tool chain = 1.10 raw).
 	if score > 1.0 {
 		score = 1.0
diff --git a/pkg/routing/router.go b/pkg/routing/router.go
index d4f5218d3..78092b106 100644
--- a/pkg/routing/router.go
+++ b/pkg/routing/router.go
@@ -57,7 +57,11 @@ func newWithClassifier(cfg RouterConfig, c Classifier) *Router {
 //
 // The caller is responsible for resolving the returned model name into
 // provider candidates (see AgentInstance.LightCandidates).
-func (r *Router) SelectModel(msg string, history []providers.Message, primaryModel string) (model string, usedLight bool) {
+func (r *Router) SelectModel(
+	msg string,
+	history []providers.Message,
+	primaryModel string,
+) (model string, usedLight bool) {
 	features := ExtractFeatures(msg, history)
 	score := r.classifier.Score(features)
 	if score < r.cfg.Threshold {
diff --git a/pkg/routing/router_test.go b/pkg/routing/router_test.go
index 168227638..267200c2e 100644
--- a/pkg/routing/router_test.go
+++ b/pkg/routing/router_test.go
@@ -38,8 +38,13 @@ func TestExtractFeatures_TokenEstimate(t *testing.T) {
 }
 
 func TestExtractFeatures_TokenEstimate_CJK(t *testing.T) {
-	// 9 CJK runes / 3 = 3 tokens
-	msg := "你好世界你好世界你" // 9 runes
+	// 9 CJK runes (U+4F60 U+597D U+4E16 U+754C × 2 + U+4F60) / 3 = 3 tokens.
+	// Using a rune slice literal avoids CJK string literals in source.
+	msg := string([]rune{
+		0x4F60, 0x597D, 0x4E16, 0x754C,
+		0x4F60, 0x597D, 0x4E16, 0x754C,
+		0x4F60,
+	})
 	f := ExtractFeatures(msg, nil)
 	if f.TokenEstimate != 3 {
 		t.Errorf("CJK TokenEstimate: got %d, want 3", f.TokenEstimate)
@@ -69,7 +74,10 @@ func TestExtractFeatures_RecentToolCalls(t *testing.T) {
 	history := make([]providers.Message, 10)
 	// Put 2 tool calls at positions 8 and 9 (within the last 6)
 	history[8] = providers.Message{Role: "assistant", ToolCalls: []providers.ToolCall{{Name: "exec"}}}
-	history[9] = providers.Message{Role: "assistant", ToolCalls: []providers.ToolCall{{Name: "read_file"}, {Name: "write_file"}}}
+	history[9] = providers.Message{
+		Role:      "assistant",
+		ToolCalls: []providers.ToolCall{{Name: "read_file"}, {Name: "write_file"}},
+	}
 	// Position 3 is outside the lookback window and must NOT be counted
 	history[3] = providers.Message{Role: "assistant", ToolCalls: []providers.ToolCall{{Name: "old_tool"}}}