[Hanchi Wang (luigiw)]

Include the microsoft.foundry string marker in Python telemetry resources and existing .NET telemetry samples. Share resource configuration across logs, traces, and metrics, preserve Python overrides, and document consumer-managed resources.

Motivation & Context

Description & Review Guide

• What are the major changes?
• What is the impact of these changes?
• What do you want reviewers to focus on?

Related Issue

Fixes #

AI Assistance

• No material AI assistance was used.
• This is an AI-assisted contribution. I reviewed, understood, and verified all submitted content and accept responsibility for it.

AI assistance details:

Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR links to an agreed issue with no competing open PR, or the Related Issue section documents a trivial-change or repository-automation exception.
• This is not a breaking change. If it is a breaking change, add the breaking change label (or add "[BREAKING]" to the title prefix, before or after any language prefix) — a workflow keeps the label and title prefix in sync automatically.

[Copilot]

🟢 Approval recommended

Static review identified no blocking issues in these narrowly scoped resource changes; Python regression tests cover the key behavior, though tests were not executed.

No open issues 🎉

What changed in this PR

Adds the string resource attribute "microsoft.foundry": "True" to Python telemetry defaults and existing .NET samples, consistently identifying telemetry across configured providers.

Changes:

• Adds the Python default marker while preserving resource override precedence, with tests for defaults and shared resources across logs, traces, and metrics.
• Updates .NET samples to include the marker, shares resource configuration in AgentOpenTelemetry, and includes resource attributes in harness file exports.
• Documents resource behavior and configuration for consumer-managed providers.

File	Description
python/​packages/​core/​tests/​core/​test_observability.py	Tests marker defaults, overrides, and cross-signal resource sharing.
python/​packages/​core/​README.md	Documents defaults and consumer-managed resources.
python/​packages/​core/​agent_framework/​observability.py	Adds and documents the default resource marker.
dotnet/​samples/​05-end-to-end/​DevUIAspireIntegration/​DevUIIntegration.ServiceDefaults/​Extensions.cs	Adds the marker to shared telemetry configuration.
dotnet/​samples/​05-end-to-end/​AgentWebChat/​AgentWebChat.ServiceDefaults/​ServiceDefaultsExtensions.cs	Adds the marker to shared telemetry configuration.
dotnet/​samples/​04-hosting/​FoundryHostedAgents/​responses/​Hosted-Observability/​Program.cs	Configures the hosted sample’s resource marker.
dotnet/​samples/​03-workflows/​Observability/​WorkflowAsAnAgent/​Program.cs	Marks the workflow telemetry resource.
dotnet/​samples/​03-workflows/​Observability/​AspireDashboard/​Program.cs	Marks the dashboard sample’s telemetry resource.
dotnet/​samples/​03-workflows/​Observability/​ApplicationInsights/​Program.cs	Marks the Application Insights telemetry resource.
dotnet/​samples/​02-agents/​Harness/​Harness_Shared_Console/​HarnessTracing.cs	Adds the marker to harness tracing.
dotnet/​samples/​02-agents/​Harness/​Harness_Shared_Console/​FileSpanExporter.cs	Writes resource attributes to trace files.
dotnet/​samples/​02-agents/​Harness/​BuildYourOwnClaw/​Claw_Step04_ProductionReady/​ClawAgent.Console/​Program.cs	Marks the console app’s shared telemetry resource.
dotnet/​samples/​02-agents/​Agents/​Agent_Step05_Observability/​Program.cs	Adds the marker to agent tracing.
dotnet/​samples/​02-agents/​AgentProviders/​foundry/​Agent_Step07_Observability/​Program.cs	Adds the marker to Foundry agent tracing.
dotnet/​samples/​02-agents/​AgentOpenTelemetry/​README.md	Explains shared resources and consumer configuration.
dotnet/​samples/​02-agents/​AgentOpenTelemetry/​Program.cs	Shares marked resource configuration across all three signals.

_{Review effort: Balanced}

[Eduard van Valkenburg (eavanvalkenburg)]

Hanchi Wang (@luigiw) The current head is clean, but the PR body still contains untouched required template placeholders: all three Description & Review Guide answers are blank, and Related Issue still says only Fixes #. Because this is a non-trivial cross-language telemetry change, please replace those placeholders with the actual major changes, impact and reviewer focus, plus an agreed issue or a documented trivial/repository-automation exception before approval. The AI Assistance disclosure is not the blocker here.