v1.1.6

Features

• Skill: Added a recoverable Cube sandbox runtime for skills, including CubeClientConfig, a unified create_cube_sandbox_client entry point, optional auto_recover support in CubeSandboxClient, sandbox lifecycle helpers, and direct CubeWorkspaceRuntime creation from the client.
• Skill: Unified skill load/run/exec/stager paths around repository-level workspace runtime resolution via repository.get_workspace_runtime(ctx), so tools under the same skill repository share one workspace runtime context.
• MCP: Added MCP tool caching to avoid repeated network access.
• Tools: Added GraphAgent support in AgentTool, allowing wrapped graph agents to return results from tool context state.
• Examples/Eval: Restored evaluation examples that were previously removed during open-source cleanup.
• Optimizer: Added support for the prompt self-optimization AgentOptimizer.

Bug Fixes

• Storage: Fixed frequent sqlite warnings in SqlSessionService by consistently using database-side func.now() for update timestamps.