feat(ai): MEAI Phase 2 — policy, sanitize, audit middleware - #232
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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>
This was referenced Jul 14, 2026
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Summary
Phase 2 of the MEAI migration: every keyed
IChatClientregistered viaAddNexoMeaiPipelineis wrapped with the fixed governance stack PolicyGate → Sanitizing → Auditing → provider throughUseNexoGovernance().This branch stacks on Phase 0 + Phase 1 work. Prefer merging #230 → #231 → this PR, or take this PR alone (includes prior phases).
Changes
src/Nexo.AI.Pipeline/Governance/:PolicyGateChatClient,SanitizingChatClient,AuditingChatClientPolicyViolationException, sanitize dispositions, ports + defaultsUseNexoGovernance(targetKey)— enforced composition orderAddNexoMeaiPipelinealways applies governance (raw providers never DI-public)local:*allowed + sanitize Pass;cloud:*denied unless allow-listed; cloud sanitize = block-on-secret / redact-on-PIITesting
Testing strategy (blast radius)
Nexo.Tests.AI.PipelineChecklist
AddNexoMeaiPipelineNext
Phase 3:
RoutingChatClientwith local-first policy × availability matrix.