e2e: main->RunTurn->RegisterAll executors; gated dispatch

taicpp/main.cpp

@@ -1,4 +1,8 @@
 #include "cli/cli.h"
+#include "agent/agent.h"
+#include "agent/exec.h"
+#include "agent/loop.h"
+#include "llm/llm.h"
 #include "version.hpp"
 #include <cstdio>
 #include <string>
@@ -6,5 +10,12 @@ int main(int argc, char** argv){
   detz::cli::Parser p; auto cmd = p.parse(argc, argv);
   if(cmd.opts.version){ std::puts(std::string(detz::kVersion).c_str()); return 0; }
   if(cmd.opts.cap_manifest){ std::fputs("# tai CAP agent manifest\n", stdout); return 0; }
+  if(cmd.name=="run" && !cmd.args.empty()){
+    detz::agent::ToolRegistry reg; detz::agent::RegisterAll(reg, ".");
+    std::string prompt; for(auto& a: cmd.args) prompt += a + " ";
+    auto r = detz::agent::RunTurn(reg, prompt);
+    std::fputs(r.output.c_str(), stdout);
+    return r.ok?0:1;
+  }
   return cmd.run();
 }