[FEATURE] Add the Task ID generated by the A2A server at the end of the streaming output

[edenreich]

Summary

Add the Task ID generated by the A2A server at the end of the streaming output.

This is useful in particular when using submit-streaming, because the chunks could get noisy and if I want to refer back to the Task ID I have to list the tasks before I can retrieve it - extra unnecessary step.

Ideally at the end of the stream I would like to see basic information like Task ID perhaps also how many tokens I spent on this particular run, how many tool calls were and a summary of the process in general.

Acceptance Criteria

• There is a useful summary at the end of the stream
• It's documented
• It's tested

[edenreich]

@claude Can you work on this?

[claude]

Claude finished @edenreich's task —— View job • claude/issue-6-20250906-2340 • Create PR ➔

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✅ Task Complete - Streaming Summary Feature Implemented!

I've successfully implemented the requested Task ID and summary display feature for the submit-streaming command.

🎯 Features Implemented

Core Summary Information:

• Task ID: Always displayed at the end of streaming
• Context ID: Conversation context identifier
• Final Status: Task completion status (completed, failed, etc.)
• Duration: Total time for streaming operation
• Event Statistics:
  • Total events processed
  • Status updates count
  • Artifact updates count
• Message Parts: Count of parts in final agent response

Example Output:

📋 Streaming Summary:
  Task ID: task-xyz123
  Context ID: ctx-abc789
  Final Status: completed
  Duration: 2.5s
  Total Events: 5
    Status Updates: 3
    Artifact Updates: 2
  Final Message Parts: 2

🚀 Implementation Highlights

• ✅ Works in both normal and raw modes - Summary appears regardless of --raw flag
• ✅ Comprehensive test coverage - Added full test suite with mock A2A client
• ✅ Type-safe implementation - Proper handling of a2a/adk type conversions
• ✅ Documentation updated - Both main and example READMEs include new features
• ✅ Follows project conventions - Passes linting, builds, and tests successfully

📋 Acceptance Criteria Status

• There is a useful summary at the end of the stream ✅
• It's documented ✅
• It's tested ✅

🔗 Create Pull Request

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Job Run: View Details | Branch: claude/issue-6-20250906-2340