feat(browser): native Go browser facade with HTTP-direct driver (#382)

cmd/sin-code/internal/catalog/source_external.go

@@ -74,6 +74,7 @@ type externalServer struct {
 var externalServers = []externalServer{
 	{name: "autodev", namespace: "autodev__*", short: "Autodev bridge", description: "Bridged-External autodev MCP server (Python stdio).", example: "autodev__plan --repo owner/repo", tags: []string{"external", "methodology"}},
 	{name: "browser", namespace: "browser__*", short: "Browser automation", description: "SIN-Browser-Tools MCP server (CDP/headless Chrome).", example: "browser__navigate https://example.com", tags: []string{"external", "browser"}},
+	{name: "native_browser", namespace: "native_browser__*", short: "Native browser facade", description: "Pure-Go native_browser facade (issue #382) — net/http + x/net/html HTTP-direct driver for static pages; MCP-delegated driver stubbed for later (no CGO, no Chromium required).", example: "native_browser__navigate https://example.com", tags: []string{"external", "browser", "native"}},
 	{name: "codocs", namespace: "codocs__*", short: "Doc coauthoring", description: "SIN-Code-Doc-Coauthoring-Skill MCP server.", example: "codocs__draft --section API", tags: []string{"external", "docs"}},
 	{name: "contextbridge", namespace: "contextbridge__*", short: "Context bridge", description: "SIN-Code-Context-Bridge-Skill MCP server.", example: "contextbridge__query 'auth module'", tags: []string{"external", "context"}},
 	{name: "frontend", namespace: "frontend__*", short: "Frontend design", description: "SIN-Code-Frontend-Design-Skill MCP server.", example: "frontend__component_create button", tags: []string{"external", "design"}},

cmd/sin-code/internal/mcpclient/registry.go

@@ -74,6 +74,15 @@ func DefaultServers() []ServerConfig {
 		// v3.22.0: sin-analyse-suite — multimodal preprocessing (image, video, PDF, logs, data, audio)
 		goNative("sin-analyse-suite", "sin-analyse", "serve"),
 
+		// v3.22.0 (issue #382): native_browser — pure-Go headless browser facade
+		// (cmd/sin-code/internal/native_browser). Registered here so its tool
+		// namespace native_browser__* is enumerated by the catalog + permission
+		// matrix; the actual implementation runs in-process behind the Driver
+		// seam and never spawns a subprocess. The optional sin-native-browser
+		// binary is a future stdio shim — see issue #382 follow-up for the
+		// release that promotes an MCP façade behind the same namespace.
+		goNative("native_browser", "sin-native-browser", "serve"),
+
 		// External MCP server (Python stdio) — autodev-cli v0.4.0 (Bridged-External, never vendored)
 		{Name: "autodev", Transport: "stdio", Command: "autodev-mcp"},
 	}
@@ -82,7 +91,8 @@ func DefaultServers() []ServerConfig {
 func shortName(repo string) string {
 	m := map[string]string{
 		"web_search_bundle":                 "websearch",
-		"sin-analyse-suite":                  "analyse",
+		"sin-analyse-suite":                 "analyse",
+		"native_browser":                    "native_browser",
 		"SIN-Code-Websearch-Skill":          "websearch",
 		"SIN-Code-Scheduler-Skill":          "scheduler",
 		"SIN-Code-Goal-Mode-Skill":          "goalmode",