feat(ai): Phase 6 — MEAI default-on cutover - #236
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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>
Introduce UseNexoGovernance with fixed PolicyGate → Sanitizing → Auditing order on every keyed IChatClient, plus unit tests for deny short-circuit, PII redaction, audit outcomes, and composition/architecture guarantees. Co-authored-by: IanFrelinger <IanFrelinger@users.noreply.github.com>
Introduce policy × availability routing outside per-target governance stacks, with audited route decisions and a table-driven matrix of local/cloud fallback scenarios. Co-authored-by: IanFrelinger <IanFrelinger@users.noreply.github.com>
Register cloud:bedrock:{fast,balanced,heavy} with configurable model ids,
reuse the default AWS credential chain, keep Bedrock SDK clients out of DI,
and cover routing/sanitization/audit with fake-transport tests.
Co-authored-by: IanFrelinger <IanFrelinger@users.noreply.github.com>
Introduce an in-process Microsoft.Extensions.VectorData store, sanitizing/ auditing embedding generators, VectorDataRagService, and a CLI reindex command while leaving the legacy RAG path read-only. Align AWS SDK CPM to v4 so Bedrock MEAI and DynamoDB co-restore cleanly. Co-authored-by: IanFrelinger <IanFrelinger@users.noreply.github.com>
Default Nexo:UseMeaiPipeline to on (opt out with 0/false). Wire IModel through MeaiBackedModel over the governed IChatClient, make HotSwappableModel accept any IModel agentic leaf, and register VectorData as the default IRAGService. Add docs/governed-pipeline.md and make meai-pipeline-gate part of kernel-gate. Keep IProviderFactory for non-chat callers. Co-authored-by: IanFrelinger <IanFrelinger@users.noreply.github.com>
Remove application/ CLI reindex wiring so master layer-boundary passes (CLI belongs on an application/* PR). Add Nexo.AI.Pipeline to the Hosting pack scripts, and cover default-on MEAI + VectorData RAG wiring in HostingE2ESmoke ProdStyle tests. Co-authored-by: IanFrelinger <IanFrelinger@users.noreply.github.com>
3 tasks
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Summary
Phase 6 MEAI cutover: the governed pipeline is on by default,
IModelroutes through MEAI, and VectorData is the defaultIRAGService.Changes
Nexo:UseMeaiPipeline=false/NEXO_USE_MEAI_PIPELINE=0MeaiBackedModel—IModel→ governed / routedIChatClientHotSwappableModelaccepts anyIModelagentic leaf (MEAI or legacyProviderBackedModel)MeaiVectorDataRagAdapteras defaultIRAGServicedocs/governed-pipeline.mdmake meai-pipeline-gateincluded inmake kernel-gateIProviderFactory/ legacy RAG types remain for non-chat / opt-out callersStacking
Includes Phases 0–5. Prefer merge after #235 (or take this tip alone).
Testing
dotnet test src/Nexo.Tests.AI.Pipeline— 36 passed (net8 + net9)make meai-pipeline-gatedotnet build src/Nexo.Hostingmake kernel-gatein CITesting strategy (blast radius)
AddNexomake meai-pipeline-gate(now part of kernel-gate)HotSwappableModel)