[FEATURE] Add --benchmark flag for performance testing

[jwesleye]

Feature Description

Run standardized performance benchmarks on agents to measure speed, cost, and quality.

Problem/Motivation

Hard to compare different agents or track performance changes over time objectively.

Proposed Solution

chat_loop myagent --benchmark

# Runs standard queries and reports:
# - Average latency: 2.3s
# - Tokens/sec: 45
# - Cost per query: $0.015
# - Total time: 23s
# - Total cost: $0.15

Benefits

• Compare agents objectively
• Track performance regressions
• Optimize for speed or cost
• Share benchmarks with team

Priority

• Critical
• High
• Medium
• Low

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity.
It will be closed in 14 days if no further activity occurs.

If this issue is still relevant, please:

• Comment to keep it open
• Remove the "status: stale" label
• Provide additional information or updates

Thank you for your contributions!

[jwesleye]

Closing as out of scope for this AWS Strands-focused CLI tool.

This project is focused on providing a simple, efficient command-line interface for AWS Strands agents. Advanced features like workflow automation, collaboration tools, and complex UI enhancements would add significant complexity without serving the core use case.

We're keeping the scope focused on:

• Solid AWS Strands agent integration
• Essential CLI features (history, templates, sessions)
• Developer productivity (debugging, validation)
• Simple, maintainable codebase

Thank you for the suggestion!