%% Grounded research desk: request journey and team handoffs. Generated.
sequenceDiagram
  autonumber
  actor n_analyst as Analyst
  participant n_workspace as Research workspace
  participant n_sso as Workforce sign-in
  participant n_answer_api as Answer API
  participant n_index as Hybrid retrieval index
  participant n_gateway as Model gateway
  participant n_model as Generation model
  participant n_ledger as Answer ledger
  participant n_corpus as Source corpus
  participant n_ingest as Ingestion pipeline
  participant n_evals as Eval harness
  participant n_traces as Traces and cost
  Note over n_analyst: Ask under your own identity
  n_analyst->>n_workspace: Question
  n_workspace-->>n_sso: SSO and group claims
  n_workspace->>n_answer_api: Question with scope token
  Note over n_answer_api: Retrieve only what they may read
  n_answer_api->>n_index: Permission-filtered query
  Note over n_answer_api: Write from passages, not memory
  n_answer_api->>n_gateway: Prompt with top passages
  n_gateway->>n_model: Model call
  Note over n_answer_api: Answer, or refuse plainly
  n_answer_api->>n_workspace: Cited answer or refusal
  n_answer_api->>n_ledger: Answer, citations, trace ID
  Note over n_corpus: Keep the corpus current
  n_corpus->>n_ingest: New or changed document
  n_ingest->>n_index: Chunks, embeddings, permission tags
  Note over n_evals: Prove it on every release
  n_evals-->>n_answer_api: Replay frozen questions per release
  n_gateway-->>n_traces: Tokens, latency, cost