fix: resolve retired/preview gemini model routing and test configuration errors

internal/router/heuristic.go

@@ -26,12 +26,13 @@ type ConditionRule struct {
 
 // Conditions defines the matching parameters for a rule.
 type Conditions struct {
-	AnyOfTags           []string `json:"any_of_tags,omitempty"`
-	MaxInputTokensLt    *int     `json:"max_input_tokens_lt,omitempty"`
-	RequiresReasoning   *bool    `json:"requires_reasoning,omitempty"`
-	RequiresToolCalling *bool    `json:"requires_tool_calling,omitempty"`
-	HasMultimodalInput  *bool    `json:"has_multimodal_input,omitempty"`
-	IsDefaultFallback   *bool    `json:"is_default_fallback,omitempty"`
+	AnyOfTags             []string `json:"any_of_tags,omitempty"`
+	MaxInputTokensLt      *int     `json:"max_input_tokens_lt,omitempty"`
+	RequiresReasoning     *bool    `json:"requires_reasoning,omitempty"`
+	RequiresToolCalling   *bool    `json:"requires_tool_calling,omitempty"`
+	IsSoftwareDevelopment *bool    `json:"is_software_development,omitempty"`
+	HasMultimodalInput    *bool    `json:"has_multimodal_input,omitempty"`
+	IsDefaultFallback     *bool    `json:"is_default_fallback,omitempty"`
 }
 
 func routeHeuristic(group db.ModelGroup, targets []string, routeCtx *RouteContext) (*Decision, error) {
@@ -198,6 +199,13 @@ func matchConditions(cond Conditions, routeCtx *RouteContext) bool {
 		}
 	}
 
+	// Check software development flag
+	if cond.IsSoftwareDevelopment != nil {
+		if routeCtx.IsSoftwareDevelopment != *cond.IsSoftwareDevelopment {
+			return false
+		}
+	}
+
 	// Check multimodal flag
 	if cond.HasMultimodalInput != nil {
 		if routeCtx.HasMultimodalInput != *cond.HasMultimodalInput {

internal/router/heuristic_test.go

@@ -140,3 +140,65 @@ func TestRouteHeuristic_LegacyRules(t *testing.T) {
 		t.Fatalf("expected kimi-k2.6, got %s", dec2.SelectedModel)
 	}
 }
+
+func TestRouteHeuristic_SoftwareDevelopmentCondition(t *testing.T) {
+	targets := []string{
+		"gemini-3-flash",
+		"kimi-k2.7-code",
+		"deepseek-v4-pro",
+		"mimo-v2.5-pro",
+	}
+
+	rulesJSON := `[
+		{
+			"rule_id": "agentic_code_and_tools",
+			"conditions": {
+				"requires_tool_calling": true,
+				"is_software_development": true
+			},
+			"primary_model": "kimi-k2.7-code",
+			"fallback_model": "deepseek-v4-pro"
+		},
+		{
+			"rule_id": "agentic_general_tasks",
+			"conditions": {
+				"requires_tool_calling": true
+			},
+			"primary_model": "mimo-v2.5-pro"
+		}
+	]`
+
+	group := db.ModelGroup{
+		ID:             "dustins_stack",
+		Strategy:       "heuristic",
+		HeuristicRules: &rulesJSON,
+	}
+
+	// 1. Tool calling + Software dev should route to kimi-k2.7-code
+	ctx1 := &RouteContext{
+		UserMessage:           "Write a python script to parse logs",
+		RequiresToolCalling:   true,
+		IsSoftwareDevelopment: true,
+	}
+	dec1, err := routeHeuristic(group, targets, ctx1)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if dec1.SelectedModel != "kimi-k2.7-code" {
+		t.Fatalf("expected kimi-k2.7-code, got %s", dec1.SelectedModel)
+	}
+
+	// 2. Tool calling but NOT Software dev should route to mimo-v2.5-pro
+	ctx2 := &RouteContext{
+		UserMessage:           "Search the web for weather in New York",
+		RequiresToolCalling:   true,
+		IsSoftwareDevelopment: false,
+	}
+	dec2, err := routeHeuristic(group, targets, ctx2)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if dec2.SelectedModel != "mimo-v2.5-pro" {
+		t.Fatalf("expected mimo-v2.5-pro, got %s (reason: %s)", dec2.SelectedModel, dec2.Reason)
+	}
+}

internal/router/router.go

@@ -18,12 +18,13 @@ type Decision struct {
 
 // RouteContext holds metadata of the request to evaluate condition rules.
 type RouteContext struct {
-	UserMessage         string   `json:"user_message"`
-	InputTokens         int      `json:"input_tokens"`
-	HasMultimodalInput  bool     `json:"has_multimodal_input"`
-	RequiresToolCalling bool     `json:"requires_tool_calling"`
-	RequiresReasoning   bool     `json:"requires_reasoning"`
-	Tags                []string `json:"tags"`
+	UserMessage           string   `json:"user_message"`
+	InputTokens           int      `json:"input_tokens"`
+	HasMultimodalInput    bool     `json:"has_multimodal_input"`
+	RequiresToolCalling   bool     `json:"requires_tool_calling"`
+	RequiresReasoning     bool     `json:"requires_reasoning"`
+	IsSoftwareDevelopment bool     `json:"is_software_development"`
+	Tags                  []string `json:"tags"`
 }
 
 // ClassifierFunc is the callback for classifier-based routing.