# Deployment Architecture — Unit: SlpSoftware Client Setup

**Status note**: this diagram documents the **target state after** the Operations-phase cutover (D-15) — it is reference/planning context for Code Generation, not something this unit deploys itself. No infrastructure changes happen as part of this Construction stage.

```mermaid
graph TD
    visitor["Site Visitor / CMS Administrator browser"]
    proxy["Proxy Pi<br/>nginx + TLS (certbot)"]
    pimain["pi-main<br/>systemd --user"]
    svc_test["slpsoftware-test.service<br/>port 5100"]
    svc_prod["slpsoftware-production.service<br/>port 5101"]
    dll["SlpModularCms.Api.SlpSoftware.dll<br/>(replaces Api.dll at cutover)"]
    db["MariaDB<br/>SlpSoftwareTest / SlpSoftwareProduction"]
    sentry["Sentry (shared project)"]

    visitor -->|"HTTPS"| proxy
    proxy -->|"proxy_pass, plain HTTP over LAN"| pimain
    pimain --> svc_test
    pimain --> svc_prod
    svc_test --> dll
    svc_prod --> dll
    dll -->|"EF Core / MariaDB provider"| db
    dll -->|"error/event reporting"| sentry

    classDef external fill:#e9d8fd,stroke:#553c9a,stroke-width:2px,color:#000000,font-weight:bold;
    classDef proxy fill:#bee3f8,stroke:#2b6cb0,stroke-width:2px,color:#000000,font-weight:bold;
    classDef compute fill:#fefcbf,stroke:#b7791f,stroke-width:2px,color:#000000,font-weight:bold;
    classDef data fill:#c6f6d5,stroke:#2f855a,stroke-width:2px,color:#000000,font-weight:bold;

    class visitor external;
    class proxy proxy;
    class pimain,svc_test,svc_prod,dll compute;
    class db,sentry data;

    linkStyle default stroke:#666666,stroke-width:2px;
```

Text alternative: a visitor's browser reaches the proxy Pi over HTTPS, which forwards plain HTTP over the LAN to pi-main; pi-main runs two systemd-managed instances (test on port 5100, production on port 5101), both eventually running `SlpModularCms.Api.SlpSoftware.dll` after the cutover, each talking to its own MariaDB database and the shared Sentry project (purple = external actor, blue = the TLS-terminating proxy, yellow = compute/hosting, green = data/observability backends).

## Local Development (Current Scope of This Unit)

```mermaid
graph LR
    dev["Developer machine"]
    api["SlpModularCms.Api<br/>(existing dev host)"]
    apislp["SlpModularCms.Api.SlpSoftware<br/>(new, this unit)"]
    dbA["Local DB: Api"]
    dbB["Local DB: Api.SlpSoftware (isolated)"]

    dev --> api
    dev --> apislp
    api --> dbA
    apislp --> dbB

    classDef dev fill:#fefcbf,stroke:#b7791f,stroke-width:2px,color:#000000,font-weight:bold;
    classDef data fill:#c6f6d5,stroke:#2f855a,stroke-width:2px,color:#000000,font-weight:bold;

    class dev,api,apislp dev;
    class dbA,dbB data;

    linkStyle default stroke:#666666,stroke-width:2px;
```

Text alternative: locally, `Api` and the new `Api.SlpSoftware` each connect to their own separate, isolated database (decision Q1 = B) — no shared local dev data between the two.