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.NET: Fix FileAgentSkillsProvider custom SkillsInstructionPrompt silently dropping skills #4388

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Merged
SergeyMenshykh merged 1 commit into from
Mar 2, 2026
Merged

.NET: Fix FileAgentSkillsProvider custom SkillsInstructionPrompt silently dropping skills #4388

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3 changes: 2 additions & 1 deletion dotnet/src/Microsoft.Agents.AI/Skills/FileAgentSkillsProvider.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -174,7 +174,8 @@ private async Task<string> ReadSkillResourceAsync(string skillName, string resou
{
try
{
promptTemplate = string.Format(optionsInstructions, string.Empty);
_ = string.Format(optionsInstructions, string.Empty);
promptTemplate = optionsInstructions;
}
catch (FormatException ex)
{
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2 changes: 2 additions & 0 deletions dotnet/tests/Microsoft.Agents.AI.UnitTests/AgentSkills/FileAgentSkillsProviderTests.cs
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Expand Up @@ -108,6 +108,8 @@ public async Task InvokingCoreAsync_CustomPromptTemplate_UsesCustomTemplateAsync
// Assert
Assert.NotNull(result.Instructions);
Assert.StartsWith("Custom template:", result.Instructions);
Assert.Contains("custom-prompt-skill", result.Instructions);
Assert.Contains("Custom prompt", result.Instructions);
}

[Fact]
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