Add middleware to baggage and output spans

[Copilot]

Manual testing

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}

Reverts the UseObservabilityMiddleware IChannelAdapter extension added in the previous commit, per author request.

• Removed ObservabilityMiddlewareExtensions.cs and its test file
• Restored design.md to its prior state

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• agent365.svc.cloud.microsoft
  • Triggering command: /usr/share/dotnet/dotnet /usr/share/dotnet/dotnet exec --runtimeconfig /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/Microsoft.Agents.A365.Observability.Runtime.Tests.runtimeconfig.json --depsfile /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/Microsoft.Agents.A365.Observability.Runtime.Tests.deps.json /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/testhost.dll --port 46691 --endpoint 127.0.0.1:046691 --role client --parentprocessid 4310 --telemetryoptedin false (dns block)
  • Triggering command: /usr/share/dotnet/dotnet /usr/share/dotnet/dotnet exec --runtimeconfig /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/Microsoft.Agents.A365.Observability.Runtime.Tests.runtimeconfig.json --depsfile /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/Microsoft.Agents.A365.Observability.Runtime.Tests.deps.json /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/testhost.dll --port 44183 --endpoint 127.0.0.1:044183 --role client --parentprocessid 4967 --telemetryoptedin false (dns block)
• override.example.com
  • Triggering command: /usr/share/dotnet/dotnet /usr/share/dotnet/dotnet exec --runtimeconfig /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/Microsoft.Agents.A365.Observability.Runtime.Tests.runtimeconfig.json --depsfile /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/Microsoft.Agents.A365.Observability.Runtime.Tests.deps.json /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/testhost.dll --port 46691 --endpoint 127.0.0.1:046691 --role client --parentprocessid 4310 --telemetryoptedin false (dns block)
  • Triggering command: /usr/share/dotnet/dotnet /usr/share/dotnet/dotnet exec --runtimeconfig /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/Microsoft.Agents.A365.Observability.Runtime.Tests.runtimeconfig.json --depsfile /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/Microsoft.Agents.A365.Observability.Runtime.Tests.deps.json /home/REDACTED/work/Agent365-dotnet/Agent365-dotnet/src/Tests/Microsoft.Agents.A365.Observability.Runtime.Tests/bin/Debug/net8.0/testhost.dll --port 44183 --endpoint 127.0.0.1:044183 --role client --parentprocessid 4967 --telemetryoptedin false (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[github-actions]

⚠️ Deprecation Warning: The deny-licenses option is deprecated for possible removal in the next major release. For more information, see issue 997.

Dependency Review

The following issues were found:

• ✅ 0 vulnerable package(s)
• ✅ 0 package(s) with incompatible licenses
• ✅ 0 package(s) with invalid SPDX license definitions
• ⚠️ 1 package(s) with unknown licenses.

See the Details below.

License Issues

src/Tests/Microsoft.Agents.A365.Observability.Hosting.Tests/Microsoft.Agents.A365.Observability.Hosting.Tests.csproj

Package	Version	License	Issue Type
Moq	>= 0	Null	Unknown License

Denied Licenses:

GPL-3.0-only, AGPL-3.0-only

OpenSSF Scorecard

Package	Version	Score	Details
nuget/Moq	>= 0	Unknown	Unknown

Scanned Files

• src/Tests/Microsoft.Agents.A365.Observability.Hosting.Tests/Microsoft.Agents.A365.Observability.Hosting.Tests.csproj

[Copilot]

Pull request overview

This PR appears to adjust the Observability Hosting surface area by adding Bot Framework middleware for OpenTelemetry baggage propagation and output span creation, along with corresponding unit tests and test dependencies.

Changes:

• Added BaggageTurnMiddleware to establish/dispose OpenTelemetry baggage per turn (skipping ContinueConversation events).
• Added OutputLoggingMiddleware to create OutputScope spans for outgoing message activities and optionally link to a parent span.
• Added/updated Hosting test project assets: new middleware unit tests and a Moq package reference.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/Observability/Hosting/Middleware/BaggageTurnMiddleware.cs	Adds Bot Framework middleware to set OpenTelemetry baggage derived from ITurnContext.
src/Observability/Hosting/Middleware/OutputLoggingMiddleware.cs	Adds Bot Framework middleware to create output tracing spans for sent message activities.
src/Tests/Microsoft.Agents.A365.Observability.Hosting.Tests/Middleware/BaggageTurnMiddlewareTests.cs	Adds unit tests covering baggage behavior and ContinueConversation skip behavior.
src/Tests/Microsoft.Agents.A365.Observability.Hosting.Tests/Middleware/OutputLoggingMiddlewareTests.cs	Adds unit tests verifying handler registration and pass-through behavior for missing context.
src/Tests/Microsoft.Agents.A365.Observability.Hosting.Tests/Microsoft.Agents.A365.Observability.Hosting.Tests.csproj	Adds Moq dependency needed by the new tests.