[xgtcode]

Summary

Align VeADK Go Skills Sandbox support with VeADK Python examples.

Changes

• Add built-in Skills Sandbox tools:
  • execute_skills
  • invoke_skill
  • poll_skill
• Add shared AgentKit client helper for endpoint, credential, and signed action requests.
• Fix AgentKit session API default host to match Python SDK behavior.
• Add Skills Sandbox advanced examples:
  • synchronous execute_skills
  • non-blocking invoke_skill / poll_skill
  • AIO/script sandbox run_code
• Load remote Skill metadata in examples via --skill-space-id.
• Support AGENTKIT_TOOL_ID_SKILLS and AGENTKIT_TOOL_ID_SCRIPT.
• Route AIO SkillToolset Python script execution through AgentKit run_code.

Validation

• go build ./examples/skills/advanced/a2a/runtime_to_aio_sandbox_run_code ./examples/skills/advanced/a2a/runtime_to_skills_sandbox_execute ./examples/skills/advanced/a2a/runtime_to_skills_sandbox_invoke_poll
• go test ./tool/skilltool
• go test tool/builtin_tools/agentkit_skills.go tool/builtin_tools/run_code.go tool/builtin_tools/agentkit_skills_test.go

Notes

• AIO run_skill_script currently supports Python scripts through run_code.
• Shell script execution is not claimed in the Go AIO example yet.