feat: add model routing table with three-layer priority

internal/config/models_test.go

@@ -0,0 +1,44 @@
+package config_test
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/mathiasbq/supervisor/internal/config"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestModelsResolve(t *testing.T) {
+	yaml := `
+default: ollama/default-model
+skills:
+  tdd: ollama/qwen3-coder-30b-tuned
+  review: ollama/devstral-tuned
+`
+	f := filepath.Join(t.TempDir(), "models.yaml")
+	require.NoError(t, os.WriteFile(f, []byte(yaml), 0644))
+
+	m, err := config.LoadModels(f)
+	require.NoError(t, err)
+
+	assert.Equal(t, "ollama/qwen3-coder-30b-tuned", m.Resolve("tdd", ""))
+	assert.Equal(t, "ollama/devstral-tuned", m.Resolve("review", ""))
+	assert.Equal(t, "ollama/default-model", m.Resolve("unknown", ""))
+}
+
+func TestModelsOverride(t *testing.T) {
+	yaml := `
+default: ollama/default-model
+skills:
+  tdd: ollama/qwen3-coder-30b-tuned
+`
+	f := filepath.Join(t.TempDir(), "models.yaml")
+	require.NoError(t, os.WriteFile(f, []byte(yaml), 0644))
+
+	m, err := config.LoadModels(f)
+	require.NoError(t, err)
+
+	assert.Equal(t, "anthropic/claude-sonnet-4-6", m.Resolve("tdd", "anthropic/claude-sonnet-4-6"))
+}