Multimodal RAG Platform
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System ContextC4 Level 1. Who uses the platform, which content sources feed it, and which external services it depends on.
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02
High-Level ArchitectureThe whole platform in six stages: ingest, understand, index, retrieve, generate, serve. The picture a sponsor should understand without narration.
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Layered ArchitectureSix layers with dependencies pointing downward only. Establishes what may call what.
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Container ArchitectureC4 Level 2. Deployable units, their technology, and the synchronous query path between them.
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Multimodal Ingestion PipelineOne lane per modality across five stages. The lanes run in parallel and converge on a single chunk record.
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Indexing & Embedding PipelineHow a normalised chunk becomes a retrievable, governed index entry.
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Retrieval & Generation FlowThe query path from admitted question to verified, cited answer.
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Data ArchitectureFour zones by ownership and rebuildability. Only one of them is irreplaceable.
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Integration ArchitectureEvery inbound and outbound interface, with protocol, cadence and direction.
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Security ArchitectureFive trust zones in decreasing exposure, with every boundary crossing labelled — including the attacker's path.
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11
Deployment & InfrastructureWhat runs where, across two availability zones and a warm standby region.
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CI/CD & Environment PromotionHow a change reaches production, and what stops a bad one — including a bad prompt.
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Observability & Evaluation MatrixSix signal types across five stages. A matrix rather than a flow, because it makes the gaps visible.
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RAGOps LifecycleThe improvement loop, drawn as a loop. A RAG system is never finished at launch.
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Critical Flow — Question to Cited AnswerThe end-to-end request as ordered messages across eight participants, including the abstain path.
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Core Data ModelNine entities carrying multi-tenancy, multimodal provenance and citation lineage.
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