Evidence Eligibility State Flow

%% Evidence Eligibility State Flow - source material must pass admission, snapshot,
%% freshness, approval, sensitivity, and permitted-use checks before it can ground reasoning.
flowchart LR
    I["Source intake<br/>retrieval · feed · upload · tool result"]
    A{"Admission decision<br/>may enter this context?"}
    X["Rejected material<br/>not evidence for this use"]
    S[("Source snapshot<br/>source id · hash · fetch date · excerpt")]
    F["Freshness state<br/>fresh · stale · unknown · expired"]
    P["Approval state<br/>approved · pending · rejected"]
    L["Use boundary<br/>sensitivity · license · permitted purpose"]
    E{"Evidence eligibility<br/>usable for this actor and claim?"}
    G["Retrieval-grounded reasoning<br/>cites eligible evidence"]
    B["Block or route review<br/>refusal · data request · approval task"]
    D[["Preserved derivation<br/>evidence bundle · decision record"]]

    I --> A
    A -->|"no"| X
    A -->|"yes"| S
    S --> F
    S --> P
    S --> L
    F --> E
    P --> E
    L --> E
    E -->|"eligible"| G
    E -->|"not eligible"| B
    G --> D
    B --> D