Simplifies the task support story for proxies and mounts:
- Mounts get full SEP-1686 task support (unchanged)
- Proxies explicitly forbid task execution
The cross-session task forwarding for proxies turned out to be complex
since each client connection creates a new server lifespan with a new
Docket context, and task keys include session_id. Rather than introduce
that complexity, proxies now explicitly refuse task-augmented execution.
Key changes:
- All proxy components (ProxyTool, ProxyPrompt, ProxyResource,
ProxyTemplate) now have task_config.mode="forbidden"
- Proxy tests verify forbidden behavior (sync execution works,
task=True returns error/raises McpError)
- Fixed prompt task handler to check hasattr(prompt, "task_config")
instead of isinstance(prompt, FunctionPrompt) so it applies to
ProxyPrompt too
- Added test suites for both proxy and mount task behavior
Also includes minor fixes:
- Fixed result.meta_ -> result.meta in ProxyTool.run()
- Fixed client handling of returned_immediately without taskId
- Bumped pydocket>=0.15.2
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
