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Roger Barreto dc4bafbc1e .NET: Add Hosted-AgentSkills sample with Foundry Skills integration (#6013)
* .NET: Add Hosted-AgentSkills sample for Foundry Skills integration

Add a new hosted agent sample that demonstrates how to load behavioral
guidelines from Foundry Skills at startup using AgentSkillsProvider and
the progressive disclosure pattern (advertise -> load on demand).

The sample:
- Downloads SKILL.md files from Foundry via ProjectAgentSkills SDK
- Extracts ZIP archives with zip-slip protection
- Wires skills into AgentSkillsProvider as an AIContextProvider
- Hosts the agent via the Responses protocol

Ships two Contoso Outdoors skills matching the Python sample (PR #5822):
- support-style: tone, formatting, signature guidelines
- escalation-policy: when and how to escalate tickets

Includes convenience provisioning gated behind PROVISION_SAMPLE_SKILLS
env var, clearly documented as NOT a production pattern.

Closes #5776

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* .NET: Add unit tests and integration test for Hosted-AgentSkills

Unit tests (14 tests, all passing):
- ZIP extraction with zip-slip guard (valid archive, traversal attack,
  sibling-prefix attack, directory entries)
- Skill name validation (rejects dots, separators, traversal patterns)
- AgentSkillsProvider with downloaded skills (advertises both skills,
  load_skill returns canary tokens, unknown skill returns error)

Container integration test:
- New 'agent-skills' scenario in the test container that creates
  Contoso Outdoors skills on disk and wires AgentSkillsProvider
- AgentSkillsHostedAgentFixture + 4 integration tests verifying:
  - Routine questions load support-style skill (STYLE-CANARY-3318)
  - Escalation triggers load escalation-policy (ESC-CANARY-7742)
  - Skills are advertised in system prompt
  - load_skill tool is invoked via FunctionCallContent

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* .NET: Add smoke test, bootstrap, and docs for agent-skills integration

- Add scripts/smoke.ps1 for local Docker smoke testing: builds the
  contributor image, runs the container, verifies both skills are loaded
  via canary tokens (STYLE-CANARY-3318, ESC-CANARY-7742)
- Add 'agent-skills' to the bootstrap script scenario list
- Add agent-skills row to the integration test README scenarios table
- Exclude HostedAgentSkillsPatternTests from net472 (uses net8.0+ APIs)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* .NET: Update commented-out package versions to latest across all hosted samples

Update the end-user PackageReference versions (in the commented-out
sections) from 1.0.0 to the current latest NuGet versions:

- Microsoft.Agents.AI: 1.6.1
- Microsoft.Agents.AI.Foundry: 1.6.1-preview.260514.1
- Microsoft.Agents.AI.Foundry.Hosting: 1.6.1-preview.260514.1
- Microsoft.Agents.AI.Hosting: 1.6.1-preview.260514.1
- Microsoft.Agents.AI.OpenAI: 1.6.1
- Microsoft.Agents.AI.Workflows: 1.6.1

Also adds explicit versions to Hosted-Workflow-Handoff which had bare
PackageReference entries without Version attributes.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* .NET: Fix broken markdown links in Hosted-AgentSkills README

Remove references to non-existent ../../README.md. Replace with
inline instructions matching other hosted samples that don't have
a parent README.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* .NET: Use OS-appropriate string comparison in zip-slip guard

Use Ordinal on Unix (case-sensitive FS) and OrdinalIgnoreCase on
Windows to prevent case-based path bypass on Linux containers.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
dc4bafbc1e · 2026-05-25 09:32:04 +00:00
History
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Agent Framework Samples

The agent framework samples are designed to help you get started with building AI-powered agents from various providers.

The Agent Framework supports building agents using various inference and inference-style services. All these are supported using the single ChatClientAgent class.

The Agent Framework also supports creating proxy agents, that allow accessing remote agents as if they were local agents. These are supported using various AIAgent subclasses.

Sample Structure

Folder Description
01-get-started/ Progressive tutorial: hello agent → hosting
02-agents/ Deep-dive by concept: tools, middleware, providers, orchestrations
03-workflows/ Workflow patterns: sequential, concurrent, state, declarative
04-hosting/ Deployment: Azure Functions, Durable Tasks
05-end-to-end/ Full applications, evaluation, demos

Getting Started

Start with 01-get-started/ and work through the numbered files:

  1. 01_hello_agent — Create and run your first agent
  2. 02_add_tools — Add function tools
  3. 03_multi_turn — Multi-turn conversations with AgentSession
  4. 04_memory — Agent memory with AIContextProvider
  5. 05_first_workflow — Build a workflow with executors and edges
  6. 06_host_your_agent — Host your agent via Azure Functions

Additional Samples

Some additional samples of note include:

  • Agents: Basic steps to get started with the agent framework. These samples demonstrate the fundamental concepts and functionalities of the agent framework when using the AIAgent and can be used with any underlying service that provides an AIAgent implementation.
  • Agent Providers: Shows how to create an AIAgent instance for a selection of providers.
  • Agent Telemetry: Demo which showcases the integration of OpenTelemetry with the Microsoft Agent Framework using Azure OpenAI and .NET Aspire Dashboard for telemetry visualization.
  • Durable Agents - Azure Functions: Samples for using the Microsoft Agent Framework with Azure Functions via the durable task extension.
  • Durable Agents - Console Apps: Samples demonstrating durable agents in console applications.

Migration from Semantic Kernel

If you are migrating from Semantic Kernel to the Microsoft Agent Framework, the following resources provide guidance and side-by-side examples to help you transition your existing agents, tools, and orchestration patterns. The migration samples map Semantic Kernel primitives (such as ChatCompletionAgent and Team orchestrations) to their Agent Framework equivalents (such as ChatClientAgent and workflow builders).

For an in-depth migration guide, see the official migration documentation.

Prerequisites

For prerequisites see each set of samples for their specific requirements.