Align Rust SDK public surface

[stephentoub]

This follow-up from the cross-language SDK surface audit keeps Rust aligned with the established C#, Go, Python, and TypeScript public APIs before the new SDK surface settles.

Summary

• Remove Rust-only high-level autoModeSwitch, exitPlanMode, and disabled_mcp_servers surfaces while leaving generated protocol event types untouched.
• Add Rust ResumeSessionConfig parity for available_tools and disabled_skills.
• Expand Rust tool results with binary payloads, tool telemetry, and an MCP CallToolResult conversion helper to match the richer tool-result support in the other SDKs.
• Update Rust README examples to use only valid high-level methods or generated session.rpc() calls, and fix Go permission handler comments.

[github-actions]

Cross-SDK Consistency Review ✅

This PR does an excellent job aligning the Rust SDK with the other four implementations. Here's my cross-SDK analysis:

Features Added to Match Other SDKs (Parity Improvements)

Feature	Node.js	Python	Go	.NET	Rust (this PR)
ResumeSessionConfig available_tools	✅ availableTools	✅ available_tools	✅ AvailableTools	✅ AvailableTools	✅ added
ResumeSessionConfig disabled_skills	✅ disabledSkills	✅ disabled_skills	✅ DisabledSkills	✅ DisabledSkills	✅ added
ToolBinaryResult + binary_results_for_llm	✅	✅	✅	✅	✅ added
tool_telemetry in ToolResultExpanded	✅ toolTelemetry	✅ tool_telemetry	✅ ToolTelemetry	✅ ToolTelemetry	✅ added
MCP CallToolResult converter	✅ convertMcpCallToolResult	✅ convert_mcp_call_tool_result	✅ ConvertMCPCallToolResult	❌ missing	✅ added

Rust-Only Surfaces Correctly Removed

The following features had no equivalents in any other SDK and are correctly removed:

• HandlerEvent::AutoModeSwitch / HandlerResponse::AutoModeSwitch / AutoModeSwitchResponse / request_auto_mode_switch — other SDKs expose auto_mode_switch.requested only as a generated session event type, not as a high-level handler callback
• HandlerEvent::ExitPlanMode / HandlerResponse::ExitPlanMode / ExitPlanModeResult / ExitPlanModeData / request_exit_plan_mode — same pattern
• SessionConfig::disabled_mcp_servers — not present in any other SDK

Minor Follow-Up Opportunity

The table above shows the .NET SDK is missing a public ConvertMcpCallToolResult() helper (Node, Python, Go, and now Rust all have it). This gap was pre-existing and is not introduced by this PR, but it may be worth a separate follow-up to bring .NET to parity.

Go documentation change

The comment update on OnPermissionRequest in both SessionConfig and ResumeSessionConfig is accurate and more actionable. No consistency concern.

Overall, this PR is well-scoped and moves the multi-SDK surface in the right direction. 👍

Generated by SDK Consistency Review Agent for issue #1212 · ● 2.3M · ◷

[stephentoub]

Thanks, @tclem.