Rename Casual to Causal

[feiyun0112]

fix #7483

[Copilot]

Pull Request Overview

This PR renames all occurrences of “Casual” to the correct “Causal” in class names, pipeline types, tests, samples, and utility methods.

• Rename model and pipeline types (e.g., Phi3ForCasualLM → Phi3ForCausalLM)
• Update related test and sample references
• Rename attention-mask helpers (e.g., MakeCasualMask → MakeCausalMask)

Reviewed Changes

Copilot reviewed 23 out of 23 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/Microsoft.ML.GenAI.Phi/Phi3/Phi3ForCausalLM.cs	Renamed class and factory methods to “Causal”
src/Microsoft.ML.GenAI.Phi/Phi2/Phi2ForCausalLM.cs	Renamed class and factory methods to “Causal”
src/Microsoft.ML.GenAI.Core/Utility/AttentionMaskConverter.cs	Renamed casual→causal flags and mask builders
test/**/*.cs	Updated tests to use new Causal classes
docs//*.cs, docs//*.md	Updated samples and docs to reference “Causal”
test/Microsoft.ML.GenAI.Core.Tests/Microsoft.ML.GenAI.Core.Tests.csproj	Updated removed test filename to Causal...

Comments suppressed due to low confidence (1)

src/Microsoft.ML.GenAI.Phi/Phi3/Phi3ForCausalLM.cs:21

• Renaming public model classes (e.g., Phi3ForCasualLM → Phi3ForCausalLM) is a breaking change. Consider providing a deprecated alias or marking the old class as [Obsolete] to help downstream consumers migrate smoothly.

public class Phi3ForCausalLM : nn.Module<CausalLMModelInput, CausalLMModelOutput>

[codecov]

Codecov Report

Attention: Patch coverage is 45.71429% with 19 lines in your changes missing coverage. Please review.

Project coverage is 68.98%. Comparing base (f861125) to head (715eb9d).

Files with missing lines	Patch %	Lines
...ft.ML.GenAI.Core/Utility/AttentionMaskConverter.cs	0.00%	10 Missing ⚠️
src/Microsoft.ML.GenAI.Phi/Module/Phi2Model.cs	0.00%	4 Missing ⚠️
src/Microsoft.ML.GenAI.Phi/Phi3/Phi3ForCausalLM.cs	25.00%	3 Missing ⚠️
...ore/Trainer/CausalLMSupervisedFineTuningTrainer.cs	0.00%	1 Missing ⚠️
src/Microsoft.ML.GenAI.Phi/Phi2/Phi2ForCausalLM.cs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7484      +/-   ##
==========================================
- Coverage   68.99%   68.98%   -0.01%     
==========================================
  Files        1482     1482              
  Lines      273880   273880              
  Branches    28254    28254              
==========================================
- Hits       188968   188949      -19     
- Misses      77529    77550      +21     
+ Partials     7383     7381       -2     

Flag	Coverage Δ
Debug	68.98% <45.71%> (-0.01%)	⬇️
production	63.27% <20.83%> (-0.01%)	⬇️
test	89.45% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
....ML.GenAI.Phi/Extension/SemanticKernelExtension.cs	100.00% <ø> (ø)
...c/Microsoft.ML.GenAI.Phi/Phi3/Phi3CausalLMAgent.cs	52.00% <100.00%> (ø)
...rosoft.ML.GenAI.Phi/Phi3/Phi3CausalLMChatClient.cs	0.00% <ø> (ø)
...enAI.Phi/Phi3/Phi3CausalLMChatCompletionService.cs	61.90% <100.00%> (ø)
...enAI.Phi/Phi3/Phi3CausalLMTextGenerationService.cs	35.71% <100.00%> (ø)
...crosoft.ML.GenAI.Core.Tests/CausalLMDatasetTest.cs	100.00% <ø> (ø)
test/Microsoft.ML.GenAI.Phi.Tests/AutoGenTests.cs	100.00% <100.00%> (ø)
test/Microsoft.ML.GenAI.Phi.Tests/Phi2Tests.cs	87.87% <100.00%> (ø)
test/Microsoft.ML.GenAI.Phi.Tests/Phi3Tests.cs	95.18% <100.00%> (ø)
...icrosoft.ML.GenAI.Phi.Tests/SemanticKernelTests.cs	100.00% <100.00%> (ø)
... and 5 more

... and 8 files with indirect coverage changes

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