← Refinery/Stratum S4Weeks 4–9 · retrieval plane live by day 63Pressure 91

Synthesise — RAG · GraphRAG · Feature mesh

Synthesise fuses vectors, graphs and features into a single retrieval plane your agents can actually trust. Every chunk carries policy, every feature has a point-in-time guarantee, every answer is evaluated.

Retrieval p50

<80ms

Answer faithfulness

>0.92

Feature freshness

<5s online

Commission this stratum →See deliverables

Deliverables

Everything that ships

Vector store (pgvector / Pinecone)
Chunked, embedded, governed corpora with TTL + ACL.
Knowledge graph
Entities, relations, temporal edges — queryable via Cypher / GraphQL.
Online feature store
Feast / Tecton — point-in-time correct features for serving.
Hybrid retriever
BM25 + dense + graph re-rank, evaluated on golden Q&A set.
Eval harness
RAGAS + custom metrics, gated by CI for every embedding change.

Pod composition

ML Engineer
Knowledge Engineer
Backend Engineer

Example output · Retriever call · /v1/retrievejson

{
  "query": "Why did churn spike in EU-West last week?",
  "scope": ["crm", "billing", "support"],
  "k": 8,
  "rerank": "graph",
  "policy": "agent.read.governed"
}

Timeline

Weeks 4–9 · retrieval plane live by day 63

1
Weeks 4–5
Corpora + embeddings
Govern, chunk, embed; TTL + ACL on every vector.
2
Weeks 5–7
Graph + features
Entity/relation graph + online feature store stood up.
3
Weeks 7–9
Hybrid retriever + evals
BM25 + dense + graph rerank, RAGAS gating in CI.

FAQs

Things prospects ask

Self-host or managed?

Both. Default is pgvector + a small graph DB on your cloud; we'll run Pinecone/Neo4j Aura if you prefer managed.

How do you stop hallucinations?

Hybrid retrieval, citation-required prompts, faithfulness scoring and a refusal policy when score < threshold.

Commission · S4 Synthesise

Stand up Synthesise in Weeks 4–9.

We'll respond within one business day with a scoping note, a fixed-price outcome contract, and a named principal. Your details sync straight into our concierge queue.

• Outcome-priced — no T&M.
• Sovereign by default — your data, your region, your keys.
• Wired into the Fuel Pressure gauge from day one.