fix(mcp): normalize streamable-http before config validation

cmd/picoclaw/internal/mcp/command_test.go

@@ -315,6 +315,28 @@ func TestMCPAddSupportsStreamableHTTPAlias(t *testing.T) {
 	assert.Equal(t, "https://mcp.context7.com/mcp", server.URL)
 }
 
+func TestSaveValidatedConfigNormalizesStreamableHTTPAlias(t *testing.T) {
+	configPath := setupMCPConfigEnv(t)
+
+	cfg := config.DefaultConfig()
+	cfg.Tools.MCP.Enabled = true
+	cfg.Tools.MCP.Servers = map[string]config.MCPServerConfig{
+		"context7": {
+			Enabled: true,
+			Type:    "streamable-http",
+			URL:     "https://mcp.context7.com/mcp",
+		},
+	}
+
+	require.NoError(t, saveValidatedConfig(cfg))
+
+	saved := readMCPConfig(t, configPath)
+	server := saved.Tools.MCP.Servers["context7"]
+	assert.Equal(t, "http", server.Type)
+	assert.Equal(t, "https://mcp.context7.com/mcp", server.URL)
+	assert.Equal(t, "streamable-http", cfg.Tools.MCP.Servers["context7"].Type)
+}
+
 func TestMCPRemoveRemovesLastServerAndDisablesMCP(t *testing.T) {
 	configPath := setupMCPConfigEnv(t)
 	writeMCPConfig(t, configPath, &config.Config{

cmd/picoclaw/internal/mcp/helpers.go

@@ -108,7 +108,9 @@ func saveValidatedConfig(cfg *config.Config) error {
 		return fmt.Errorf("config is nil")
 	}
 
-	data, err := json.Marshal(cfg)
+	normalizedCfg := normalizedConfigForSave(cfg)
+
+	data, err := json.Marshal(normalizedCfg)
 	if err != nil {
 		return fmt.Errorf("failed to serialize config: %w", err)
 	}
@@ -117,13 +119,32 @@ func saveValidatedConfig(cfg *config.Config) error {
 		return err
 	}
 
-	if err := config.SaveConfig(internal.GetConfigPath(), cfg); err != nil {
+	if err := config.SaveConfig(internal.GetConfigPath(), normalizedCfg); err != nil {
 		return fmt.Errorf("failed to save config: %w", err)
 	}
 
 	return nil
 }
 
+func normalizedConfigForSave(cfg *config.Config) *config.Config {
+	clone := *cfg
+	if cfg.Tools.MCP.Servers == nil {
+		return &clone
+	}
+
+	clone.Tools = cfg.Tools
+	clone.Tools.MCP = cfg.Tools.MCP
+	clone.Tools.MCP.Servers = make(map[string]config.MCPServerConfig, len(cfg.Tools.MCP.Servers))
+	for name, server := range cfg.Tools.MCP.Servers {
+		if server.Type != "" {
+			server.Type = config.NormalizeMCPTransportType(server.Type)
+		}
+		clone.Tools.MCP.Servers[name] = server
+	}
+
+	return &clone
+}
+
 func validateConfigDocument(data []byte) error {
 	var instance map[string]any
 	if err := json.Unmarshal(data, &instance); err != nil {