Summary

• Add Slack native thread processing status via assistant.threads.setStatus
• Route Slack ProcessingStateOutput through the channel output renderer contract
• Keep optional status rendering best-effort with timeout, ordering, and cleanup protections
• Add actor, renderer, reply-client, and registry tests
• Document Slack loading status behavior and scope requirements

Validation

• dotnet test "Netclaw.slnx"
• dotnet slopwatch analyze
• pwsh ./scripts/Add-FileHeaders.ps1 -Verify
• git diff --check