feat(ai): MEAI Phase 1 — IChatClient pipeline behind feature flag - #231
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Map current model invocation, sanitization, audit, policy packs, RAG, and host DI seams to proposed Microsoft.Extensions.AI concepts for the governed pipeline migration. Co-authored-by: IanFrelinger <IanFrelinger@users.noreply.github.com>
Add Nexo.AI.Pipeline with keyed local:ollama and local:onnx chat clients, wire optional registration through hosting Phase 13b when Nexo:UseMeaiPipeline is enabled (default off), and cover registration with FakeChatClient tests. Legacy IProviderFactory path remains default. Co-authored-by: IanFrelinger <IanFrelinger@users.noreply.github.com>
This was referenced Jul 14, 2026
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Summary
Phase 1 of the MEAI governed pipeline migration: introduces
Nexo.AI.Pipelinewith keyedIChatClienttargets for local Ollama and local LLamaSharp (local:onnx), registered behindNexo:UseMeaiPipeline(default off). LegacyIProviderFactorypath is unchanged.Depends on / includes Phase 0 notes (
docs/meai-migration-notes.md). Prefer merging #230 first or take this PR which already contains those notes.Changes
src/Nexo.AI.Pipeline(net8.0;net9.0):OllamaHttpChatClient— thin HTTP/api/chatadapter (OllamaSharp deferred: Roslyn 5 analyzer vs repo C# 12 pin)LlamaSharpChatClient— GGUF offline target keyed aslocal:onnxAddNexoMeaiPipeline+AddKeyedChatClient; raw clients never registered in DIFakeChatClientfor testsNexoHostingOptions.UseMeaiPipeline/Nexo:UseMeaiPipeline/NEXO_USE_MEAI_PIPELINEMicrosoft.Extensions.AI10.7.0; bump related Extensions/System.Text.*10.0.8 → 10.0.9src/Nexo.Tests.AI.Pipeline(7 tests × net8/net9)docs/meai-migration-notes.mdwith Phase 1 discoveriesTesting
Testing strategy (blast radius)
Nexo.Tests.AI.Pipelinemake kernel-gate(optional follow-up for full kernel)Checklist