From 073c6df10e475b6bb65d4d1cac60777485c18e01 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Tue, 5 May 2026 16:30:47 -0700
Subject: [PATCH 01/22] inital commit for a railengine-based status page

---
 .gitignore | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index f6c2a54..e204c20 100644
--- a/.gitignore
+++ b/.gitignore
@@ -85,12 +85,21 @@ dmypy.json
 **/package-lock.json
 **/bun.lock
 
-**/.vs/*
-**/packages/*
+**/.vs/
+**/packages/
+[Bb]in/
 [Oo]bj/
 [Dd]ebug/
 [Rr]elease/
+**/TestResults/
+*.user
+*.suo
+*.rsuser
+*.nupkg
+*.snupkg
+**/publish/
 **/Secrets.cs
 **/secrets.py
 
 
+/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.json

From d597109859622428fc939976a01ffb560058cdfb Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Tue, 5 May 2026 16:31:16 -0700
Subject: [PATCH 02/22] added page and api for displaying a chart of three
 metrics

---
 .../Controllers/MetricsController.cs          |  26 +++++
 .../Models/MetricRecord.cs                    |   8 ++
 .../RailenginePoweredStatusPage/Program.cs    |  22 ++++
 .../Properties/launchSettings.json            |  38 +++++++
 .../RailenginePoweredStatusPage.csproj        |  13 +++
 .../RailenginePoweredStatusPage.sln           |  25 +++++
 .../appsettings.Development.sample.json       |  12 +++
 .../appsettings.json                          |  13 +++
 .../wwwroot/index.html                        | 101 ++++++++++++++++++
 .../wwwroot/styles.css                        |  49 +++++++++
 10 files changed, 307 insertions(+)
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Program.cs
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Properties/launchSettings.json
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/RailenginePoweredStatusPage.csproj
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/RailenginePoweredStatusPage.sln
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
new file mode 100644
index 0000000..f2ce553
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
@@ -0,0 +1,26 @@
+using Microsoft.AspNetCore.Mvc;
+using Railengine;
+using RailenginePoweredStatusPage.Models;
+
+namespace RailenginePoweredStatusPage.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class MetricsController : ControllerBase
+{
+    private readonly RailengineClient railengineClient;
+    private readonly Guid engineId;
+
+    public MetricsController(RailengineClient railengineClient, IConfiguration configuration)
+    {
+        this.railengineClient = railengineClient;
+        engineId = Guid.Parse(configuration["RailEngine:EngineId"]!);
+    }
+
+    [HttpGet]
+    public async Task<ActionResult<List<MetricRecord>>> GetMetrics()
+    {
+        // TODO: query railengineClient with engineId
+        return Ok(new List<MetricRecord>());
+    }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs b/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs
new file mode 100644
index 0000000..295b684
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs
@@ -0,0 +1,8 @@
+namespace RailenginePoweredStatusPage.Models;
+
+public class MetricRecord
+{
+    public string Metric { get; set; } = string.Empty;
+    public long Timestamp { get; set; }
+    public double Value { get; set; }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Program.cs b/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
new file mode 100644
index 0000000..60ae884
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
@@ -0,0 +1,22 @@
+using Railengine;
+
+var builder = WebApplication.CreateBuilder(args);
+
+builder.Services.AddControllers();
+builder.Services.AddHttpClient();
+builder.Services.AddSingleton<RailengineClient>(sp =>
+{
+    var config = sp.GetRequiredService<IConfiguration>();
+    var httpClient = sp.GetRequiredService<IHttpClientFactory>().CreateClient();
+    var pat = config["RailEngine:PAT"]!;
+    return new RailengineClient(httpClient, pat);
+});
+
+var app = builder.Build();
+
+app.UseDefaultFiles();
+app.UseStaticFiles();
+
+app.MapControllers();
+
+app.Run();
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Properties/launchSettings.json b/CSharp/Examples/RailenginePoweredStatusPage/Properties/launchSettings.json
new file mode 100644
index 0000000..f6fe80d
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Properties/launchSettings.json
@@ -0,0 +1,38 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:32971",
+      "sslPort": 44321
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5142",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7042;http://localhost:5142",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/RailenginePoweredStatusPage.csproj b/CSharp/Examples/RailenginePoweredStatusPage/RailenginePoweredStatusPage.csproj
new file mode 100644
index 0000000..4c79571
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/RailenginePoweredStatusPage.csproj
@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Railengine.Retrieval" Version="1.0.2" />
+  </ItemGroup>
+
+</Project>
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/RailenginePoweredStatusPage.sln b/CSharp/Examples/RailenginePoweredStatusPage/RailenginePoweredStatusPage.sln
new file mode 100644
index 0000000..ab2bb57
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/RailenginePoweredStatusPage.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.10.35122.118
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "RailenginePoweredStatusPage", "RailenginePoweredStatusPage.csproj", "{B8DD1C94-F2B5-4183-9FED-9ABC883CFA50}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B8DD1C94-F2B5-4183-9FED-9ABC883CFA50}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B8DD1C94-F2B5-4183-9FED-9ABC883CFA50}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B8DD1C94-F2B5-4183-9FED-9ABC883CFA50}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B8DD1C94-F2B5-4183-9FED-9ABC883CFA50}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {63C4A898-DC79-4258-9B09-FF9ED957ADD6}
+	EndGlobalSection
+EndGlobal
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json
new file mode 100644
index 0000000..9b823ed
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json
@@ -0,0 +1,12 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "RailEngine": {
+    "PAT": "[your-pat-token-here]",
+    "EngineId": "[your-engine-id-here]"
+  }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
new file mode 100644
index 0000000..61ff680
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
@@ -0,0 +1,13 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*",
+  "RailEngine": {
+    "PAT": "[your-pat-token-here]",
+    "EngineId": "[your-engine-id-here]"
+  }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
new file mode 100644
index 0000000..e78892a
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
@@ -0,0 +1,101 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Status Page</title>
+  <link rel="stylesheet" href="styles.css" />
+  <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+</head>
+<body>
+  <h1>System Status</h1>
+
+  <div class="charts">
+    <div class="card">
+      <h2>Engine Load</h2>
+      <div class="chart-wrap"><canvas id="chart-engine-load"></canvas></div>
+    </div>
+    <div class="card">
+      <h2>Team Members</h2>
+      <div class="chart-wrap"><canvas id="chart-team-members"></canvas></div>
+    </div>
+    <div class="card">
+      <h2>Logs</h2>
+      <div class="chart-wrap"><canvas id="chart-logs"></canvas></div>
+    </div>
+  </div>
+
+  <p id="error" class="error" hidden></p>
+
+  <script>
+    const METRICS = [
+      { key: 'engine-load',   canvasId: 'chart-engine-load',   color: '#6366f1' },
+      { key: 'team-members',  canvasId: 'chart-team-members',  color: '#22d3ee' },
+      { key: 'logs',          canvasId: 'chart-logs',          color: '#34d399' },
+    ];
+
+    function formatTimestamp(ms) {
+      return new Date(ms).toLocaleTimeString();
+    }
+
+    function buildChart(canvasId, labels, values, color) {
+      const ctx = document.getElementById(canvasId).getContext('2d');
+      return new Chart(ctx, {
+        type: 'line',
+        data: {
+          labels,
+          datasets: [{
+            data: values,
+            borderColor: color,
+            backgroundColor: color + '22',
+            borderWidth: 2,
+            pointRadius: 4,
+            pointHoverRadius: 6,
+            fill: true,
+            tension: 0.3,
+          }],
+        },
+        options: {
+          responsive: true,
+          maintainAspectRatio: false,
+          plugins: { legend: { display: false } },
+          scales: {
+            x: { ticks: { color: '#64748b' }, grid: { color: '#2d3248' } },
+            y: { ticks: { color: '#64748b' }, grid: { color: '#2d3248' } },
+          },
+        },
+      });
+    }
+
+    async function loadMetrics() {
+      const res = await fetch('/api/metrics');
+      if (!res.ok) throw new Error(`HTTP ${res.status}`);
+      return res.json();
+    }
+
+    async function init() {
+      try {
+        const records = await loadMetrics();
+
+        for (const { key, canvasId, color } of METRICS) {
+          const subset = records
+            .filter(r => r.metric === key)
+            .sort((a, b) => a.timestamp - b.timestamp);
+
+          const labels = subset.map(r => formatTimestamp(r.timestamp));
+          const values = subset.map(r => r.value);
+
+          buildChart(canvasId, labels, values, color);
+        }
+      } catch (err) {
+        const el = document.getElementById('error');
+        el.textContent = `Failed to load metrics: ${err.message}`;
+        el.hidden = false;
+      }
+    }
+
+    init();
+    setInterval(init, 5 * 60 * 1000);
+  </script>
+</body>
+</html>
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
new file mode 100644
index 0000000..e793f21
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
@@ -0,0 +1,49 @@
+*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
+
+body {
+  font-family: system-ui, sans-serif;
+  background: #0f1117;
+  color: #e2e8f0;
+  min-height: 100vh;
+  padding: 2rem;
+}
+
+h1 {
+  font-size: 1.5rem;
+  font-weight: 600;
+  margin-bottom: 2rem;
+  color: #f8fafc;
+}
+
+.charts {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
+  gap: 1.5rem;
+}
+
+.card {
+  background: #1e2130;
+  border: 1px solid #2d3248;
+  border-radius: 12px;
+  padding: 1.5rem;
+}
+
+.card h2 {
+  font-size: 0.85rem;
+  font-weight: 500;
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  color: #94a3b8;
+  margin-bottom: 1rem;
+}
+
+.chart-wrap {
+  position: relative;
+  height: 220px;
+}
+
+.error {
+  color: #f87171;
+  font-size: 0.875rem;
+  margin-top: 1rem;
+}

From 4441d8ac72ad891e55be06c0a30424f3839504f2 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Tue, 5 May 2026 16:34:32 -0700
Subject: [PATCH 03/22] added readme file for status page example

---
 .../RailenginePoweredStatusPage/README.md     | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/README.md

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/README.md b/CSharp/Examples/RailenginePoweredStatusPage/README.md
new file mode 100644
index 0000000..412ba3c
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/README.md
@@ -0,0 +1,31 @@
+# Railengine Powered Status Page
+
+A minimal ASP.NET Core web app that demonstrates using the [Railengine](https://railtown.ai) SDK to retrieve metrics and display them as live charts on a status page.
+
+## What it does
+
+The app exposes a `/api/metrics` endpoint that queries a Railengine engine for metric records, then serves a status page that renders the results as three Chart.js line charts — one per metric. The page auto-refreshes every 5 minutes.
+
+## Expected metric shape
+
+The engine is expected to return records in the following format:
+
+```json
+{ "metric": "engine-load", "timestamp": 1778023020646, "value": 64.2 }
+{ "metric": "team-members", "timestamp": 1778023021948, "value": 1240 }
+{ "metric": "logs", "timestamp": 1778023023341, "value": 0.133333 }
+```
+
+Each record has a `metric` name, a Unix millisecond `timestamp`, and a numeric `value`. Multiple records per metric are supported and will be plotted as a time series.
+
+## Getting started
+
+1. Copy `appsettings.Development.sample.json` to `appsettings.Development.json`
+2. Fill in your Railengine PAT and engine ID
+3. Run the app:
+
+```bash
+dotnet run
+```
+
+The status page is served at `https://localhost:<port>/`.

From 3b4ff2ee8497d375bd234bb03e8800aed02a13bd Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Tue, 5 May 2026 16:39:47 -0700
Subject: [PATCH 04/22] added allowed IPs setting so the status page can be
 hidden from unauthorized users

---
 .../Middleware/IPAllowlistMiddleware.cs       | 29 +++++++++++++++++++
 .../RailenginePoweredStatusPage/Program.cs    |  3 ++
 .../RailenginePoweredStatusPage/README.md     | 17 ++++++++++-
 .../appsettings.Development.sample.json       |  3 +-
 .../appsettings.json                          |  3 +-
 .../wwwroot/index.html                        |  4 +++
 6 files changed, 56 insertions(+), 3 deletions(-)
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Middleware/IPAllowlistMiddleware.cs

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Middleware/IPAllowlistMiddleware.cs b/CSharp/Examples/RailenginePoweredStatusPage/Middleware/IPAllowlistMiddleware.cs
new file mode 100644
index 0000000..d5f43b4
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Middleware/IPAllowlistMiddleware.cs
@@ -0,0 +1,29 @@
+using System.Net;
+
+namespace RailenginePoweredStatusPage.Middleware;
+
+public class IPAllowlistMiddleware
+{
+    private readonly RequestDelegate next;
+    private readonly HashSet<IPAddress> allowedIPs;
+
+    public IPAllowlistMiddleware(RequestDelegate next, IConfiguration configuration)
+    {
+        this.next = next;
+        var entries = configuration.GetSection("AllowedIPs").Get<string[]>() ?? [];
+        allowedIPs = entries.Select(IPAddress.Parse).ToHashSet();
+    }
+
+    public async Task InvokeAsync(HttpContext context)
+    {
+        var remoteIP = context.Connection.RemoteIpAddress;
+
+        if (remoteIP is null || !allowedIPs.Contains(remoteIP.MapToIPv4()) && !allowedIPs.Contains(remoteIP.MapToIPv6()))
+        {
+            context.Response.StatusCode = StatusCodes.Status403Forbidden;
+            return;
+        }
+
+        await next(context);
+    }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Program.cs b/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
index 60ae884..4c15d70 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
@@ -1,4 +1,5 @@
 using Railengine;
+using RailenginePoweredStatusPage.Middleware;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -14,6 +15,8 @@
 
 var app = builder.Build();
 
+app.UseMiddleware<IPAllowlistMiddleware>();
+
 app.UseDefaultFiles();
 app.UseStaticFiles();
 
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/README.md b/CSharp/Examples/RailenginePoweredStatusPage/README.md
index 412ba3c..bae9367 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/README.md
+++ b/CSharp/Examples/RailenginePoweredStatusPage/README.md
@@ -18,11 +18,26 @@ The engine is expected to return records in the following format:
 
 Each record has a `metric` name, a Unix millisecond `timestamp`, and a numeric `value`. Multiple records per metric are supported and will be plotted as a time series.
 
+## Configuration
+
+### IP allowlist
+
+Access to the site is restricted by IP address. Any request from an IP not on the allowlist receives a `403 Forbidden` response.
+
+The allowed IPs are configured via the `AllowedIPs` array in `appsettings.json`:
+
+```json
+"AllowedIPs": [ "127.0.0.1", "::1" ]
+```
+
+The default permits localhost only. Add the IP addresses of any machines that should be able to view the status page.
+
 ## Getting started
 
 1. Copy `appsettings.Development.sample.json` to `appsettings.Development.json`
 2. Fill in your Railengine PAT and engine ID
-3. Run the app:
+3. Add any additional IP addresses to `AllowedIPs` as needed
+4. Run the app:
 
 ```bash
 dotnet run
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json
index 9b823ed..d95b2f7 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json
+++ b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json
@@ -8,5 +8,6 @@
   "RailEngine": {
     "PAT": "[your-pat-token-here]",
     "EngineId": "[your-engine-id-here]"
-  }
+  },
+  "AllowedIPs": [ "127.0.0.1", "::1" ]
 }
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
index 61ff680..ffccb6f 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
+++ b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
@@ -9,5 +9,6 @@
   "RailEngine": {
     "PAT": "[your-pat-token-here]",
     "EngineId": "[your-engine-id-here]"
-  }
+  },
+  "AllowedIPs": [ "127.0.0.1", "::1" ]
 }
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
index e78892a..9ec5388 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
@@ -77,6 +77,9 @@ <h2>Logs</h2>
       try {
         const records = await loadMetrics();
 
+        document.getElementById('error').hidden = true;
+        document.querySelector('.charts').hidden = false;
+
         for (const { key, canvasId, color } of METRICS) {
           const subset = records
             .filter(r => r.metric === key)
@@ -88,6 +91,7 @@ <h2>Logs</h2>
           buildChart(canvasId, labels, values, color);
         }
       } catch (err) {
+        document.querySelector('.charts').hidden = true;
         const el = document.getElementById('error');
         el.textContent = `Failed to load metrics: ${err.message}`;
         el.hidden = false;

From c4d2437975f2feed049db2641fe6ce63bca72e85 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Tue, 5 May 2026 16:45:35 -0700
Subject: [PATCH 05/22] added call to list storage documents

---
 .../Controllers/MetricsController.cs                     | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
index f2ce553..174cca8 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
@@ -20,7 +20,12 @@ public MetricsController(RailengineClient railengineClient, IConfiguration confi
     [HttpGet]
     public async Task<ActionResult<List<MetricRecord>>> GetMetrics()
     {
-        // TODO: query railengineClient with engineId
-        return Ok(new List<MetricRecord>());
+        var results = await railengineClient.ListStorageDocuments<MetricRecord>(
+            engineId,
+            pageNumber: 1,
+            pageSize: 100
+        );
+
+        return Ok(results);
     }
 }

From 1b2d62f185c17e7f73f5dcf92beaaa8b28cff359 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 10:36:16 -0700
Subject: [PATCH 06/22] fixed charts and json casing issue, stop hard refresh
 and just refresh charts, added footer

---
 .../Controllers/MetricsController.cs          |   2 +-
 .../Models/MetricRecord.cs                    |   7 +++
 ...ilengine_logo_dark-1-scaled-1-2048x585.png | Bin 0 -> 20008 bytes
 .../wwwroot/index.html                        |  49 ++++++++++++------
 .../wwwroot/styles.css                        |  35 +++++++++++++
 5 files changed, 77 insertions(+), 16 deletions(-)
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/wwwroot/cropped-Railengine_logo_dark-1-scaled-1-2048x585.png

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
index 174cca8..3217060 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
@@ -26,6 +26,6 @@ public async Task<ActionResult<List<MetricRecord>>> GetMetrics()
             pageSize: 100
         );
 
-        return Ok(results);
+        return Ok(results.Items.Select(i => i.Document).ToList());
     }
 }
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs b/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs
index 295b684..3c5bf83 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs
@@ -1,8 +1,15 @@
+using System.Text.Json.Serialization;
+
 namespace RailenginePoweredStatusPage.Models;
 
 public class MetricRecord
 {
+    [JsonPropertyName("metric")]
     public string Metric { get; set; } = string.Empty;
+
+    [JsonPropertyName("timestamp")]
     public long Timestamp { get; set; }
+
+    [JsonPropertyName("value")]
     public double Value { get; set; }
 }
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/cropped-Railengine_logo_dark-1-scaled-1-2048x585.png b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/cropped-Railengine_logo_dark-1-scaled-1-2048x585.png
new file mode 100644
index 0000000000000000000000000000000000000000..7cf5aa995433e2e210ab871dc632761cd6433550
GIT binary patch
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HcmV?d00001

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
index 9ec5388..3248143 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
@@ -3,39 +3,45 @@
 <head>
   <meta charset="UTF-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-  <title>Status Page</title>
+  <title>railtown.ai system metrics</title>
   <link rel="stylesheet" href="styles.css" />
   <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
 </head>
 <body>
-  <h1>System Status</h1>
-
+  <h1>railtown.ai system metrics</h1>
   <div class="charts">
     <div class="card">
-      <h2>Engine Load</h2>
+      <h2>Railengine<span class="latest" id="latest-engine-load"></span></h2>
       <div class="chart-wrap"><canvas id="chart-engine-load"></canvas></div>
     </div>
     <div class="card">
-      <h2>Team Members</h2>
+      <h2>Users<span class="latest" id="latest-team-members"></span></h2>
       <div class="chart-wrap"><canvas id="chart-team-members"></canvas></div>
     </div>
     <div class="card">
-      <h2>Logs</h2>
+      <h2>Conductr Logs <span class="latest" id="latest-logs"></span></h2>
       <div class="chart-wrap"><canvas id="chart-logs"></canvas></div>
     </div>
   </div>
 
   <p id="error" class="error" hidden></p>
 
+  <footer class="powered-by">
+    <span>Powered by</span>
+    <a href="https://railengine.ai/" target="_blank" rel="noopener noreferrer">
+      <img src="cropped-Railengine_logo_dark-1-scaled-1-2048x585.png" alt="Railengine" />
+    </a>
+  </footer>
+
   <script>
     const METRICS = [
-      { key: 'engine-load',   canvasId: 'chart-engine-load',   color: '#6366f1' },
-      { key: 'team-members',  canvasId: 'chart-team-members',  color: '#22d3ee' },
-      { key: 'logs',          canvasId: 'chart-logs',          color: '#34d399' },
+      { key: 'engine-load',   canvasId: 'chart-engine-load',   latestId: 'latest-engine-load',   color: '#6366f1', unit: 'bytes/min' },
+      { key: 'team-members',  canvasId: 'chart-team-members',  latestId: 'latest-team-members',  color: '#22d3ee', unit: 'users' },
+      { key: 'logs',          canvasId: 'chart-logs',          latestId: 'latest-logs',          color: '#34d399', unit: 'logs/min' },
     ];
 
     function formatTimestamp(ms) {
-      return new Date(ms).toLocaleTimeString();
+      return new Date(ms).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit', hour12: false });
     }
 
     function buildChart(canvasId, labels, values, color) {
@@ -73,14 +79,17 @@ <h2>Logs</h2>
       return res.json();
     }
 
-    async function init() {
+    const charts = {};
+
+    async function refresh() {
       try {
         const records = await loadMetrics();
 
         document.getElementById('error').hidden = true;
         document.querySelector('.charts').hidden = false;
 
-        for (const { key, canvasId, color } of METRICS) {
+        for (const metric of METRICS) {
+          const { key, canvasId, latestId, color, unit } = metric;
           const subset = records
             .filter(r => r.metric === key)
             .sort((a, b) => a.timestamp - b.timestamp);
@@ -88,7 +97,17 @@ <h2>Logs</h2>
           const labels = subset.map(r => formatTimestamp(r.timestamp));
           const values = subset.map(r => r.value);
 
-          buildChart(canvasId, labels, values, color);
+          const latest = values.length ? values[values.length - 1] : 0;
+          document.getElementById(latestId).textContent = `${latest.toFixed(2).replace(/\.00$/, '')} ${unit}`;
+
+          if (charts[canvasId]) {
+            const chart = charts[canvasId];
+            chart.data.labels = labels;
+            chart.data.datasets[0].data = values;
+            chart.update();
+          } else {
+            charts[canvasId] = buildChart(canvasId, labels, values, color);
+          }
         }
       } catch (err) {
         document.querySelector('.charts').hidden = true;
@@ -98,8 +117,8 @@ <h2>Logs</h2>
       }
     }
 
-    init();
-    setInterval(init, 5 * 60 * 1000);
+    refresh();
+    setInterval(refresh, 5 * 60 * 1000);
   </script>
 </body>
 </html>
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
index e793f21..e65bc42 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
@@ -21,6 +21,10 @@ h1 {
   gap: 1.5rem;
 }
 
+.charts[hidden] {
+  display: none;
+}
+
 .card {
   background: #1e2130;
   border: 1px solid #2d3248;
@@ -29,6 +33,10 @@ h1 {
 }
 
 .card h2 {
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+  gap: 0.5rem;
   font-size: 0.85rem;
   font-weight: 500;
   text-transform: uppercase;
@@ -37,6 +45,13 @@ h1 {
   margin-bottom: 1rem;
 }
 
+.card h2 .latest {
+  font-size: 1.25rem;
+  font-weight: 600;
+  letter-spacing: 0;
+  color: #f8fafc;
+}
+
 .chart-wrap {
   position: relative;
   height: 220px;
@@ -47,3 +62,23 @@ h1 {
   font-size: 0.875rem;
   margin-top: 1rem;
 }
+
+.powered-by {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.6rem;
+  margin-top: 3rem;
+  color: #64748b;
+  font-size: 0.8rem;
+  letter-spacing: 0.05em;
+}
+
+.powered-by img {
+  height: 2.8rem;
+  width: auto;
+  display: block;
+  background: #e2e8f0;
+  padding: 0.6rem 1.2rem;
+  border-radius: 6px;
+}

From 944aab375930c5559cde765ff76d0f16ff84b6b8 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 10:47:50 -0700
Subject: [PATCH 07/22] created the METRICS config so any number of metrics can
 be added, implemented hideRepeats which removes repetitive data points from
 the chart.

---
 .../RailenginePoweredStatusPage/README.md     | 26 ++++-
 .../wwwroot/index.html                        | 96 ++++++++++++-------
 2 files changed, 88 insertions(+), 34 deletions(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/README.md b/CSharp/Examples/RailenginePoweredStatusPage/README.md
index bae9367..789132f 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/README.md
+++ b/CSharp/Examples/RailenginePoweredStatusPage/README.md
@@ -4,7 +4,7 @@ A minimal ASP.NET Core web app that demonstrates using the [Railengine](https://
 
 ## What it does
 
-The app exposes a `/api/metrics` endpoint that queries a Railengine engine for metric records, then serves a status page that renders the results as three Chart.js line charts — one per metric. The page auto-refreshes every 5 minutes.
+The app exposes a `/api/metrics` endpoint that queries a Railengine engine for metric records, then serves a status page that renders the results as one Chart.js line chart per configured metric. Each card header shows the most recent value with its unit, rounded to 2 decimal places. The page fetches updated data every 5 minutes (configurable via `REFRESH_INTERVAL_MS` in `wwwroot/index.html`) and updates the charts in place — no full page reload.
 
 ## Expected metric shape
 
@@ -18,6 +18,30 @@ The engine is expected to return records in the following format:
 
 Each record has a `metric` name, a Unix millisecond `timestamp`, and a numeric `value`. Multiple records per metric are supported and will be plotted as a time series.
 
+The C# `MetricRecord` model deserializes from camelCase JSON via `[JsonPropertyName]` attributes. If you copy the model into another project and use PascalCase JSON content, all values will silently deserialize to their type defaults (zeros, empty strings) — adjust the attributes (or your stored JSON) to match.
+
+## Customizing metrics
+
+To adapt the page for a different set of metrics, edit only the `METRICS` array near the top of the script in `wwwroot/index.html`:
+
+```js
+const METRICS = [
+  { key: 'engine-load',  label: 'Railengine',    unit: 'bytes/min', color: '#6366f1' },
+  { key: 'team-members', label: 'Users',         unit: 'users',     color: '#22d3ee', hideRepeats: true },
+  { key: 'logs',         label: 'Conductr Logs', unit: 'logs/min',  color: '#34d399' },
+];
+```
+
+Each entry:
+
+- `key` — must match the `metric` field on records returned by `/api/metrics`
+- `label` — shown as the card header
+- `unit` — appended after the latest reading (e.g. `5.23 bytes/min`)
+- `color` — the line and fill color (any CSS color)
+- `hideRepeats` — optional, defaults to `false`. When `true`, point markers are suppressed for samples whose value matches the previous one — useful for metrics that report constantly when you only care about changes (e.g. user counts). The line itself stays continuous; only the dots are hidden.
+
+Cards are generated from this list at page load, so adding, removing, renaming, or recoloring a metric is a one-line change. The page title and `<h1>` heading are still hardcoded in `wwwroot/index.html` if you want to rebrand those too.
+
 ## Configuration
 
 ### IP allowlist
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
index 3248143..dd2207f 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
@@ -9,20 +9,7 @@
 </head>
 <body>
   <h1>railtown.ai system metrics</h1>
-  <div class="charts">
-    <div class="card">
-      <h2>Railengine<span class="latest" id="latest-engine-load"></span></h2>
-      <div class="chart-wrap"><canvas id="chart-engine-load"></canvas></div>
-    </div>
-    <div class="card">
-      <h2>Users<span class="latest" id="latest-team-members"></span></h2>
-      <div class="chart-wrap"><canvas id="chart-team-members"></canvas></div>
-    </div>
-    <div class="card">
-      <h2>Conductr Logs <span class="latest" id="latest-logs"></span></h2>
-      <div class="chart-wrap"><canvas id="chart-logs"></canvas></div>
-    </div>
-  </div>
+  <div class="charts"></div>
 
   <p id="error" class="error" hidden></p>
 
@@ -34,19 +21,65 @@ <h2>Conductr Logs <span class="latest" id="latest-logs"></span></h2>
   </footer>
 
   <script>
+    // To adapt this status page, edit only this list. Add, remove, rename,
+    // or recolor metrics here — the cards render automatically from it.
+    //   key:         matches the `metric` field on records returned by /api/metrics
+    //   label:       shown as the card header
+    //   unit:        appended after the latest reading
+    //   color:       line + fill color (any CSS color)
+    //   hideRepeats: optional. When true, point markers are suppressed for samples
+    //                whose value matches the previous one. Useful for metrics that
+    //                report constantly and you only want to highlight changes.
     const METRICS = [
-      { key: 'engine-load',   canvasId: 'chart-engine-load',   latestId: 'latest-engine-load',   color: '#6366f1', unit: 'bytes/min' },
-      { key: 'team-members',  canvasId: 'chart-team-members',  latestId: 'latest-team-members',  color: '#22d3ee', unit: 'users' },
-      { key: 'logs',          canvasId: 'chart-logs',          latestId: 'latest-logs',          color: '#34d399', unit: 'logs/min' },
+      { key: 'engine-load',  label: 'Railengine',    unit: 'bytes/min', color: '#6366f1' },
+      { key: 'team-members', label: 'Users',         unit: 'users',     color: '#22d3ee', hideRepeats: true },
+      { key: 'logs',         label: 'Conductr Logs', unit: 'logs/min',  color: '#34d399' },
     ];
 
+    const REFRESH_INTERVAL_MS = 5 * 60 * 1000;
+
+    function buildCards(metrics, container) {
+      for (const metric of metrics) {
+        const card = document.createElement('div');
+        card.className = 'card';
+
+        const heading = document.createElement('h2');
+        heading.append(metric.label);
+        const latest = document.createElement('span');
+        latest.className = 'latest';
+        heading.append(latest);
+
+        const wrap = document.createElement('div');
+        wrap.className = 'chart-wrap';
+        const canvas = document.createElement('canvas');
+        wrap.append(canvas);
+
+        card.append(heading, wrap);
+        container.append(card);
+
+        metric.latestEl = latest;
+        metric.canvas = canvas;
+      }
+    }
+
     function formatTimestamp(ms) {
       return new Date(ms).toLocaleTimeString([], { hour: '2-digit', minute: '2-digit', hour12: false });
     }
 
-    function buildChart(canvasId, labels, values, color) {
-      const ctx = document.getElementById(canvasId).getContext('2d');
-      return new Chart(ctx, {
+    function formatLatest(value, unit) {
+      return `${value.toFixed(2).replace(/\.00$/, '')} ${unit}`;
+    }
+
+    function buildChart(canvas, labels, values, color, hideRepeats) {
+      const pointRadius = hideRepeats
+        ? ctx => {
+            const data = ctx.dataset.data;
+            const i = ctx.dataIndex;
+            return i > 0 && data[i] === data[i - 1] ? 0 : 4;
+          }
+        : 4;
+
+      return new Chart(canvas.getContext('2d'), {
         type: 'line',
         data: {
           labels,
@@ -55,7 +88,7 @@ <h2>Conductr Logs <span class="latest" id="latest-logs"></span></h2>
             borderColor: color,
             backgroundColor: color + '22',
             borderWidth: 2,
-            pointRadius: 4,
+            pointRadius,
             pointHoverRadius: 6,
             fill: true,
             tension: 0.3,
@@ -79,8 +112,6 @@ <h2>Conductr Logs <span class="latest" id="latest-logs"></span></h2>
       return res.json();
     }
 
-    const charts = {};
-
     async function refresh() {
       try {
         const records = await loadMetrics();
@@ -89,24 +120,22 @@ <h2>Conductr Logs <span class="latest" id="latest-logs"></span></h2>
         document.querySelector('.charts').hidden = false;
 
         for (const metric of METRICS) {
-          const { key, canvasId, latestId, color, unit } = metric;
           const subset = records
-            .filter(r => r.metric === key)
+            .filter(r => r.metric === metric.key)
             .sort((a, b) => a.timestamp - b.timestamp);
 
           const labels = subset.map(r => formatTimestamp(r.timestamp));
           const values = subset.map(r => r.value);
 
           const latest = values.length ? values[values.length - 1] : 0;
-          document.getElementById(latestId).textContent = `${latest.toFixed(2).replace(/\.00$/, '')} ${unit}`;
+          metric.latestEl.textContent = formatLatest(latest, metric.unit);
 
-          if (charts[canvasId]) {
-            const chart = charts[canvasId];
-            chart.data.labels = labels;
-            chart.data.datasets[0].data = values;
-            chart.update();
+          if (metric.chart) {
+            metric.chart.data.labels = labels;
+            metric.chart.data.datasets[0].data = values;
+            metric.chart.update();
           } else {
-            charts[canvasId] = buildChart(canvasId, labels, values, color);
+            metric.chart = buildChart(metric.canvas, labels, values, metric.color, metric.hideRepeats);
           }
         }
       } catch (err) {
@@ -117,8 +146,9 @@ <h2>Conductr Logs <span class="latest" id="latest-logs"></span></h2>
       }
     }
 
+    buildCards(METRICS, document.querySelector('.charts'));
     refresh();
-    setInterval(refresh, 5 * 60 * 1000);
+    setInterval(refresh, REFRESH_INTERVAL_MS);
   </script>
 </body>
 </html>

From abfde6de40b1925001ba9cf0a5da37fcb0ee9856 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 10:53:23 -0700
Subject: [PATCH 08/22] made the readme examples more general

---
 .../Examples/RailenginePoweredStatusPage/README.md | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/README.md b/CSharp/Examples/RailenginePoweredStatusPage/README.md
index 789132f..dcb2295 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/README.md
+++ b/CSharp/Examples/RailenginePoweredStatusPage/README.md
@@ -11,9 +11,10 @@ The app exposes a `/api/metrics` endpoint that queries a Railengine engine for m
 The engine is expected to return records in the following format:
 
 ```json
-{ "metric": "engine-load", "timestamp": 1778023020646, "value": 64.2 }
-{ "metric": "team-members", "timestamp": 1778023021948, "value": 1240 }
-{ "metric": "logs", "timestamp": 1778023023341, "value": 0.133333 }
+{ "metric": "latency-p95",  "timestamp": 1778023020646, "value": 87.3 }
+{ "metric": "error-rate",   "timestamp": 1778023021948, "value": 2.4 }
+{ "metric": "active-users", "timestamp": 1778023023341, "value": 1240 }
+{ "metric": "requests",     "timestamp": 1778023024702, "value": 3742 }
 ```
 
 Each record has a `metric` name, a Unix millisecond `timestamp`, and a numeric `value`. Multiple records per metric are supported and will be plotted as a time series.
@@ -26,9 +27,10 @@ To adapt the page for a different set of metrics, edit only the `METRICS` array
 
 ```js
 const METRICS = [
-  { key: 'engine-load',  label: 'Railengine',    unit: 'bytes/min', color: '#6366f1' },
-  { key: 'team-members', label: 'Users',         unit: 'users',     color: '#22d3ee', hideRepeats: true },
-  { key: 'logs',         label: 'Conductr Logs', unit: 'logs/min',  color: '#34d399' },
+  { key: 'latency-p95',  label: 'API Latency (p95)', unit: 'ms',         color: '#22d3ee' },
+  { key: 'error-rate',   label: 'Error Rate',        unit: 'errors/min', color: '#f59e0b' },
+  { key: 'active-users', label: 'Active Users',      unit: 'users',      color: '#34d399', hideRepeats: true },
+  { key: 'requests',     label: 'Requests',          unit: 'req/min',    color: '#6366f1' },
 ];
 ```
 

From cb0f1c4bb9ea24dbcbd1a5935c3f1d38ea6202ba Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 10:54:58 -0700
Subject: [PATCH 09/22] cleanup references to engine/Railengine

---
 CSharp/Examples/RailenginePoweredStatusPage/README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/README.md b/CSharp/Examples/RailenginePoweredStatusPage/README.md
index dcb2295..91e4795 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/README.md
+++ b/CSharp/Examples/RailenginePoweredStatusPage/README.md
@@ -4,11 +4,11 @@ A minimal ASP.NET Core web app that demonstrates using the [Railengine](https://
 
 ## What it does
 
-The app exposes a `/api/metrics` endpoint that queries a Railengine engine for metric records, then serves a status page that renders the results as one Chart.js line chart per configured metric. Each card header shows the most recent value with its unit, rounded to 2 decimal places. The page fetches updated data every 5 minutes (configurable via `REFRESH_INTERVAL_MS` in `wwwroot/index.html`) and updates the charts in place — no full page reload.
+The app exposes a `/api/metrics` endpoint that queries Railengine for metric records, then serves a status page that renders the results as one Chart.js line chart per configured metric. Each card header shows the most recent value with its unit, rounded to 2 decimal places. The page fetches updated data every 5 minutes (configurable via `REFRESH_INTERVAL_MS` in `wwwroot/index.html`) and updates the charts in place — no full page reload.
 
 ## Expected metric shape
 
-The engine is expected to return records in the following format:
+Railengine is expected to return records in the following format:
 
 ```json
 { "metric": "latency-p95",  "timestamp": 1778023020646, "value": 87.3 }

From 600ffc59e69a3b5e38ccecb5abe333bf3287e112 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 11:00:28 -0700
Subject: [PATCH 10/22] updated csharp readme with more instructions and
 references to the sample app

---
 CSharp/README.md | 80 ++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 78 insertions(+), 2 deletions(-)

diff --git a/CSharp/README.md b/CSharp/README.md
index 0206521..966f210 100644
--- a/CSharp/README.md
+++ b/CSharp/README.md
@@ -1,5 +1,81 @@
 # Railengine samples that use the C# SDK
 
-Coming soon!
+This folder contains C# / .NET examples that use the [Railengine](https://railengine.ai) SDK. The SDK is published on NuGet and works in any .NET 8+ application.
 
-[Quick start](https://www.nuget.org/packages/Railengine.Ingestion)
+## Prerequisites
+
+- [.NET 8 SDK](https://dotnet.microsoft.com/download) or later
+- A free [Railengine](https://railengine.ai) account
+
+## Set up Railengine
+
+1. Sign up for a free account at [Railengine](https://railengine.ai)
+2. Create an Agent project
+3. Create a new Engine with a schema that matches the data you want to store
+4. From the engine settings, generate the credentials you need:
+   - **PAT** — Personal Access Token, used for retrieval
+   - **Engine Token** — used for ingestion
+   - **Engine ID** — shown on the engine page
+
+For a worked end-to-end setup with an example schema, see the [TypeScript Expense Tracker](../TypeScript/nextjs-expensify) — the engine setup flow is the same regardless of language.
+
+## Install the NuGet packages
+
+The Railengine C# SDK is split into separate packages so you can install only what you need:
+
+- **[Railengine.Retrieval](https://www.nuget.org/packages/Railengine.Retrieval)** — query stored documents (list, get by ID, index search, vector search). Used by the status page example.
+- **[Railengine.Ingestion](https://www.nuget.org/packages/Railengine.Ingestion)** — upsert and delete documents.
+
+Install via the .NET CLI:
+
+```bash
+dotnet add package Railengine.Retrieval
+dotnet add package Railengine.Ingestion
+```
+
+Or add a `<PackageReference>` to your `.csproj`:
+
+```xml
+<PackageReference Include="Railengine.Retrieval" Version="1.0.2" />
+```
+
+## Configure credentials
+
+Examples in this folder read credentials from `appsettings.Development.json` (committed only as `.sample.json` for safety). A typical configuration block:
+
+```json
+"RailEngine": {
+  "PAT": "[your-pat-token-here]",
+  "EngineId": "[your-engine-id-here]"
+}
+```
+
+Register `RailengineClient` as a singleton in `Program.cs`:
+
+```csharp
+using Railengine;
+
+builder.Services.AddHttpClient();
+builder.Services.AddSingleton<RailengineClient>(sp =>
+{
+    var config = sp.GetRequiredService<IConfiguration>();
+    var httpClient = sp.GetRequiredService<IHttpClientFactory>().CreateClient();
+    var pat = config["RailEngine:PAT"]!;
+    return new RailengineClient(httpClient, pat);
+});
+```
+
+Then inject `RailengineClient` into your controllers or services.
+
+## Examples
+
+- **[RailenginePoweredStatusPage](Examples/RailenginePoweredStatusPage)** — ASP.NET Core status page that pulls metric records from Railengine and renders them as live Chart.js line charts. Demonstrates `RailengineClient.ListStorageDocuments<T>`.
+
+## Run an example
+
+```bash
+cd Examples/RailenginePoweredStatusPage
+cp appsettings.Development.sample.json appsettings.Development.json
+# edit appsettings.Development.json with your PAT and Engine ID
+dotnet run
+```

From 96b3ea6ce4c67cf27293d2c03cf5a54df6f97493 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 11:04:58 -0700
Subject: [PATCH 11/22] clarified .net requirements

---
 CSharp/README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CSharp/README.md b/CSharp/README.md
index 966f210..87ae19d 100644
--- a/CSharp/README.md
+++ b/CSharp/README.md
@@ -1,10 +1,10 @@
 # Railengine samples that use the C# SDK
 
-This folder contains C# / .NET examples that use the [Railengine](https://railengine.ai) SDK. The SDK is published on NuGet and works in any .NET 8+ application.
+This folder contains C# / .NET examples that use the [Railengine](https://railengine.ai) SDK. The SDK targets **.NET Standard 2.0**, so it can be consumed from any compatible runtime (.NET Framework 4.6.1+, .NET Core 2.0+, .NET 5+, etc.). The sample apps in this folder target **.NET 8**.
 
 ## Prerequisites
 
-- [.NET 8 SDK](https://dotnet.microsoft.com/download) or later
+- [.NET 8 SDK](https://dotnet.microsoft.com/download) (required to build and run the samples; the SDK itself only requires a .NET Standard 2.0–compatible runtime)
 - A free [Railengine](https://railengine.ai) account
 
 ## Set up Railengine

From e2c7950d392c46e3c2dae87be8733a7d751664b5 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 11:36:23 -0700
Subject: [PATCH 12/22] added a daily insight to the status page using
 railengine MCP

---
 .../Controllers/InsightController.cs          |  24 ++++
 .../RailenginePoweredStatusPage/Program.cs    |   3 +
 .../RailenginePoweredStatusPage/README.md     |  15 +-
 .../Services/DailyInsight.cs                  |   8 ++
 .../Services/DailyInsightService.cs           | 130 ++++++++++++++++++
 .../appsettings.Development.sample.json       |   3 +
 .../appsettings.json                          |   9 +-
 .../wwwroot/index.html                        |  36 ++++-
 .../wwwroot/styles.css                        |  35 +++++
 9 files changed, 259 insertions(+), 4 deletions(-)
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Controllers/InsightController.cs
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsight.cs
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/InsightController.cs b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/InsightController.cs
new file mode 100644
index 0000000..28bb178
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/InsightController.cs
@@ -0,0 +1,24 @@
+using Microsoft.AspNetCore.Mvc;
+using RailenginePoweredStatusPage.Services;
+
+namespace RailenginePoweredStatusPage.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class InsightController : ControllerBase
+{
+    private readonly DailyInsight insight;
+
+    public InsightController(DailyInsight insight)
+    {
+        this.insight = insight;
+    }
+
+    [HttpGet]
+    public IActionResult Get() => Ok(new
+    {
+        text = insight.Text,
+        generatedAt = insight.GeneratedAt,
+        error = insight.Error,
+    });
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Program.cs b/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
index 4c15d70..275bfbb 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
@@ -1,5 +1,6 @@
 using Railengine;
 using RailenginePoweredStatusPage.Middleware;
+using RailenginePoweredStatusPage.Services;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -12,6 +13,8 @@
     var pat = config["RailEngine:PAT"]!;
     return new RailengineClient(httpClient, pat);
 });
+builder.Services.AddSingleton<DailyInsight>();
+builder.Services.AddHostedService<DailyInsightService>();
 
 var app = builder.Build();
 
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/README.md b/CSharp/Examples/RailenginePoweredStatusPage/README.md
index 91e4795..d4be078 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/README.md
+++ b/CSharp/Examples/RailenginePoweredStatusPage/README.md
@@ -44,6 +44,16 @@ Each entry:
 
 Cards are generated from this list at page load, so adding, removing, renaming, or recoloring a metric is a one-line change. The page title and `<h1>` heading are still hardcoded in `wwwroot/index.html` if you want to rebrand those too.
 
+## Daily insight (optional)
+
+If an `Anthropic:ApiKey` is configured, the app runs a `BackgroundService` that wakes once every 24 hours, calls the Claude API with the engine's [Railengine MCP server](https://cndr.railtown.ai/api/mcp/engine/{EngineId}) attached as a tool source, and asks Claude to review the recent metric data. The result is exposed at `/api/insight` and rendered as a "Daily Insight" card above the charts, with a "generated Xh ago" timestamp.
+
+This demonstrates Claude autonomously deciding which Railengine tools to call (`getEngineStorageDocuments`, `searchEngineDocuments`, …) and reasoning over the results — useful as a worked example of the MCP client beta in C#. The same PAT used for the SDK is forwarded as the MCP server's bearer token.
+
+If `Anthropic:ApiKey` is not set, the service logs a notice and exits cleanly; the insight card simply doesn't appear.
+
+> **Heads-up for local development:** the 24-hour timer is in-memory only, so each app restart triggers a fresh generation and a corresponding Anthropic API call. If you're iterating on the app you may want to comment out `AddHostedService<DailyInsightService>()` in `Program.cs` until you're ready to test it. Once deployed to a long-running host, restarts are rare and this isn't a concern.
+
 ## Configuration
 
 ### IP allowlist
@@ -62,8 +72,9 @@ The default permits localhost only. Add the IP addresses of any machines that sh
 
 1. Copy `appsettings.Development.sample.json` to `appsettings.Development.json`
 2. Fill in your Railengine PAT and engine ID
-3. Add any additional IP addresses to `AllowedIPs` as needed
-4. Run the app:
+3. (Optional) Set `Anthropic:ApiKey` to enable the daily insight card
+4. Add any additional IP addresses to `AllowedIPs` as needed
+5. Run the app:
 
 ```bash
 dotnet run
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsight.cs b/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsight.cs
new file mode 100644
index 0000000..dfd7b50
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsight.cs
@@ -0,0 +1,8 @@
+namespace RailenginePoweredStatusPage.Services;
+
+public class DailyInsight
+{
+    public string? Text { get; set; }
+    public DateTimeOffset? GeneratedAt { get; set; }
+    public string? Error { get; set; }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs b/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs
new file mode 100644
index 0000000..e509a98
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs
@@ -0,0 +1,130 @@
+using System.Net.Http.Json;
+using System.Text.Json;
+
+namespace RailenginePoweredStatusPage.Services;
+
+public class DailyInsightService : BackgroundService
+{
+    private readonly IHttpClientFactory httpClientFactory;
+    private readonly DailyInsight state;
+    private readonly ILogger<DailyInsightService> logger;
+    private readonly string apiKey;
+    private readonly string apiVersion;
+    private readonly string beta;
+    private readonly string model;
+    private readonly Guid engineId;
+    private readonly string pat;
+    private readonly string mcpServerBaseUrl;
+    private readonly string mcpServerName;
+
+    private static readonly TimeSpan Interval = TimeSpan.FromHours(24);
+
+    private const string Prompt =
+        "You are an automated reviewer for a status page dashboard. " +
+        "Use the available Railengine tools to fetch the most recent metric records stored in this engine, then summarize what you find.\n\n" +
+        "Output format (strict):\n" +
+        "- One single line per metric, nothing else.\n" +
+        "- Format: \"{Metric name}: {one-sentence insight including the latest value and any notable trend}\"\n" +
+        "- Plain text only. No markdown, no headers, no bullets, no emoji, no bold.\n" +
+        "- No preamble, no commentary about your process, no closing remarks.\n" +
+        "- If a metric is flat, say so concisely.";
+
+    public DailyInsightService(
+        IHttpClientFactory httpClientFactory,
+        DailyInsight state,
+        IConfiguration configuration,
+        ILogger<DailyInsightService> logger)
+    {
+        this.httpClientFactory = httpClientFactory;
+        this.state = state;
+        this.logger = logger;
+        apiKey = configuration["Anthropic:ApiKey"] ?? "";
+        apiVersion = configuration["Anthropic:ApiVersion"]!;
+        beta = configuration["Anthropic:Beta"]!;
+        model = configuration["Anthropic:Model"]!;
+        engineId = Guid.Parse(configuration["RailEngine:EngineId"]!);
+        pat = configuration["RailEngine:PAT"]!;
+        mcpServerBaseUrl = configuration["RailEngine:McpServerBaseUrl"]!.TrimEnd('/');
+        mcpServerName = configuration["RailEngine:McpServerName"]!;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        if (string.IsNullOrEmpty(apiKey))
+        {
+            logger.LogInformation("Anthropic:ApiKey not configured; daily insight disabled.");
+            return;
+        }
+
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            try
+            {
+                await GenerateAsync(stoppingToken);
+                state.Error = null;
+            }
+            catch (Exception ex)
+            {
+                logger.LogError(ex, "Daily insight generation failed");
+                state.Error = ex.Message;
+            }
+
+            try { await Task.Delay(Interval, stoppingToken); }
+            catch (TaskCanceledException) { return; }
+        }
+    }
+
+    private async Task GenerateAsync(CancellationToken ct)
+    {
+        using var client = httpClientFactory.CreateClient();
+        using var request = new HttpRequestMessage(HttpMethod.Post, "https://api.anthropic.com/v1/messages");
+        request.Headers.Add("x-api-key", apiKey);
+        request.Headers.Add("anthropic-version", apiVersion);
+        request.Headers.Add("anthropic-beta", beta);
+
+        var body = new
+        {
+            model,
+            max_tokens = 1024,
+            mcp_servers = new[]
+            {
+                new
+                {
+                    type = "url",
+                    url = $"{mcpServerBaseUrl}/{engineId}",
+                    name = mcpServerName,
+                    authorization_token = pat,
+                },
+            },
+            messages = new[]
+            {
+                new { role = "user", content = Prompt },
+            },
+        };
+
+        request.Content = JsonContent.Create(body);
+
+        using var response = await client.SendAsync(request, ct);
+        var responseBody = await response.Content.ReadAsStringAsync(ct);
+
+        if (!response.IsSuccessStatusCode)
+        {
+            throw new InvalidOperationException($"Claude API returned {(int)response.StatusCode}: {responseBody}");
+        }
+
+        using var doc = JsonDocument.Parse(responseBody);
+        var content = doc.RootElement.GetProperty("content");
+
+        // Take the final text block. Earlier text blocks are narration emitted
+        // between MCP tool calls ("I'll start by exploring…") which we don't want.
+        var text = content.EnumerateArray()
+            .Where(b => b.GetProperty("type").GetString() == "text")
+            .Select(b => b.GetProperty("text").GetString())
+            .Where(s => !string.IsNullOrWhiteSpace(s))
+            .LastOrDefault() ?? "";
+
+        state.Text = text;
+        state.GeneratedAt = DateTimeOffset.UtcNow;
+        logger.LogInformation("Daily insight generated ({Length} chars)", text.Length);
+    }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json
index d95b2f7..4d1fdca 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json
+++ b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.sample.json
@@ -9,5 +9,8 @@
     "PAT": "[your-pat-token-here]",
     "EngineId": "[your-engine-id-here]"
   },
+  "Anthropic": {
+    "ApiKey": "[your-anthropic-api-key-here]"
+  },
   "AllowedIPs": [ "127.0.0.1", "::1" ]
 }
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
index ffccb6f..40d6b85 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
+++ b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
@@ -8,7 +8,14 @@
   "AllowedHosts": "*",
   "RailEngine": {
     "PAT": "[your-pat-token-here]",
-    "EngineId": "[your-engine-id-here]"
+    "EngineId": "[your-engine-id-here]",
+    "McpServerBaseUrl": "https://cndr.railtown.ai/api/mcp/engine",
+    "McpServerName": "railengine"
+  },
+  "Anthropic": {
+    "ApiVersion": "2023-06-01",
+    "Beta": "mcp-client-2025-04-04",
+    "Model": "claude-sonnet-4-6"
   },
   "AllowedIPs": [ "127.0.0.1", "::1" ]
 }
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
index dd2207f..3026ae0 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
@@ -9,6 +9,12 @@
 </head>
 <body>
   <h1>railtown.ai system metrics</h1>
+
+  <section class="insight" hidden>
+    <h2>Daily Insight <span class="insight-meta"></span></h2>
+    <p class="insight-body"></p>
+  </section>
+
   <div class="charts"></div>
 
   <p id="error" class="error" hidden></p>
@@ -112,6 +118,33 @@ <h1>railtown.ai system metrics</h1>
       return res.json();
     }
 
+    function formatTimeAgo(iso) {
+      if (!iso) return '';
+      const ms = Date.now() - new Date(iso).getTime();
+      const minutes = Math.floor(ms / 60000);
+      if (minutes < 1) return 'just now';
+      if (minutes < 60) return `${minutes}m ago`;
+      const hours = Math.floor(minutes / 60);
+      if (hours < 24) return `${hours}h ago`;
+      const days = Math.floor(hours / 24);
+      return `${days}d ago`;
+    }
+
+    async function loadInsight() {
+      const section = document.querySelector('.insight');
+      try {
+        const res = await fetch('/api/insight');
+        if (!res.ok) { section.hidden = true; return; }
+        const data = await res.json();
+        if (!data.text) { section.hidden = true; return; }
+        section.querySelector('.insight-body').textContent = data.text;
+        section.querySelector('.insight-meta').textContent = `generated ${formatTimeAgo(data.generatedAt)}`;
+        section.hidden = false;
+      } catch {
+        section.hidden = true;
+      }
+    }
+
     async function refresh() {
       try {
         const records = await loadMetrics();
@@ -148,7 +181,8 @@ <h1>railtown.ai system metrics</h1>
 
     buildCards(METRICS, document.querySelector('.charts'));
     refresh();
-    setInterval(refresh, REFRESH_INTERVAL_MS);
+    loadInsight();
+    setInterval(() => { refresh(); loadInsight(); }, REFRESH_INTERVAL_MS);
   </script>
 </body>
 </html>
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
index e65bc42..c0efb70 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
@@ -15,6 +15,41 @@ h1 {
   color: #f8fafc;
 }
 
+.insight {
+  background: #1e2130;
+  border: 1px solid #2d3248;
+  border-radius: 12px;
+  padding: 1.5rem;
+  margin-bottom: 1.5rem;
+}
+
+.insight h2 {
+  display: flex;
+  align-items: baseline;
+  gap: 0.75rem;
+  font-size: 0.85rem;
+  font-weight: 500;
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  color: #94a3b8;
+  margin-bottom: 0.75rem;
+}
+
+.insight-meta {
+  font-size: 0.75rem;
+  text-transform: none;
+  letter-spacing: 0;
+  color: #64748b;
+  font-weight: 400;
+}
+
+.insight-body {
+  font-size: 0.95rem;
+  line-height: 1.5;
+  color: #e2e8f0;
+  white-space: pre-wrap;
+}
+
 .charts {
   display: grid;
   grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));

From 6209ca1111aa03b8aa9551ce0b7ae953d68e0f95 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 14:29:58 -0700
Subject: [PATCH 13/22] ignore azure publish profiles and dependencies

---
 .gitignore | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index e204c20..185ad45 100644
--- a/.gitignore
+++ b/.gitignore
@@ -100,6 +100,8 @@ dmypy.json
 **/publish/
 **/Secrets.cs
 **/secrets.py
-
+**/PublishProfiles
+**/ServiceDependencies
 
 /CSharp/Examples/RailenginePoweredStatusPage/appsettings.Development.json
+

From e762bc2f3839b9816d424a61cb93f7077b268c83 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 16:05:47 -0700
Subject: [PATCH 14/22] use streaming and optimise model and prompt to get a
 quick response

---
 .../Services/DailyInsightService.cs           | 107 +++++++++++++++---
 .../appsettings.json                          |   2 +-
 2 files changed, 92 insertions(+), 17 deletions(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs b/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs
index e509a98..2edf56d 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs
@@ -1,4 +1,5 @@
 using System.Net.Http.Json;
+using System.Text;
 using System.Text.Json;
 
 namespace RailenginePoweredStatusPage.Services;
@@ -18,10 +19,11 @@ public class DailyInsightService : BackgroundService
     private readonly string mcpServerName;
 
     private static readonly TimeSpan Interval = TimeSpan.FromHours(24);
+    private static readonly TimeSpan RequestTimeout = TimeSpan.FromMinutes(10);
 
     private const string Prompt =
-        "You are an automated reviewer for a status page dashboard. " +
-        "Use the available Railengine tools to fetch the most recent metric records stored in this engine, then summarize what you find.\n\n" +
+        "You are an automated reviewer for a status page dashboard.\n\n" +
+        "Use AT MOST 2 Railengine tool calls. Call `getEngineStorageDocuments` to fetch the 50 most recent metric records in a single call, then summarize. Do not use the vector or embedding search tools — this engine has no vectors. Do not make additional exploratory calls.\n\n" +
         "Output format (strict):\n" +
         "- One single line per metric, nothing else.\n" +
         "- Format: \"{Metric name}: {one-sentence insight including the latest value and any notable trend}\"\n" +
@@ -76,7 +78,15 @@ protected override async Task ExecuteAsync(CancellationToken stoppingToken)
 
     private async Task GenerateAsync(CancellationToken ct)
     {
+        logger.LogInformation("Starting daily insight generation…");
+
+        // Bound the entire streamed call by RequestTimeout via a linked CTS,
+        // and disable HttpClient.Timeout so it doesn't cancel the stream mid-read.
+        using var cts = CancellationTokenSource.CreateLinkedTokenSource(ct);
+        cts.CancelAfter(RequestTimeout);
+
         using var client = httpClientFactory.CreateClient();
+        client.Timeout = Timeout.InfiniteTimeSpan;
         using var request = new HttpRequestMessage(HttpMethod.Post, "https://api.anthropic.com/v1/messages");
         request.Headers.Add("x-api-key", apiKey);
         request.Headers.Add("anthropic-version", apiVersion);
@@ -85,7 +95,8 @@ private async Task GenerateAsync(CancellationToken ct)
         var body = new
         {
             model,
-            max_tokens = 1024,
+            max_tokens = 256,
+            stream = true,
             mcp_servers = new[]
             {
                 new
@@ -104,27 +115,91 @@ private async Task GenerateAsync(CancellationToken ct)
 
         request.Content = JsonContent.Create(body);
 
-        using var response = await client.SendAsync(request, ct);
-        var responseBody = await response.Content.ReadAsStringAsync(ct);
+        // ResponseHeadersRead returns as soon as headers arrive; stream is read below.
+        using var response = await client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cts.Token);
 
         if (!response.IsSuccessStatusCode)
         {
-            throw new InvalidOperationException($"Claude API returned {(int)response.StatusCode}: {responseBody}");
+            var errBody = await response.Content.ReadAsStringAsync(cts.Token);
+            throw new InvalidOperationException($"Claude API returned {(int)response.StatusCode}: {errBody}");
         }
 
-        using var doc = JsonDocument.Parse(responseBody);
-        var content = doc.RootElement.GetProperty("content");
-
-        // Take the final text block. Earlier text blocks are narration emitted
-        // between MCP tool calls ("I'll start by exploring…") which we don't want.
-        var text = content.EnumerateArray()
-            .Where(b => b.GetProperty("type").GetString() == "text")
-            .Select(b => b.GetProperty("text").GetString())
-            .Where(s => !string.IsNullOrWhiteSpace(s))
-            .LastOrDefault() ?? "";
+        var text = await ReadTextFromStreamAsync(response, cts.Token);
 
         state.Text = text;
         state.GeneratedAt = DateTimeOffset.UtcNow;
         logger.LogInformation("Daily insight generated ({Length} chars)", text.Length);
     }
+
+    // Parse Anthropic's SSE stream and accumulate text per content-block index.
+    // We only care about blocks of type "text"; mcp_tool_use and mcp_tool_result
+    // blocks are tracked but their content ignored. The final assistant answer
+    // is the highest-indexed text block.
+    private static async Task<string> ReadTextFromStreamAsync(HttpResponseMessage response, CancellationToken ct)
+    {
+        var blocks = new Dictionary<int, (string Type, StringBuilder Text)>();
+
+        using var stream = await response.Content.ReadAsStreamAsync(ct);
+        using var reader = new StreamReader(stream);
+
+        string? eventType = null;
+        string? line;
+        while ((line = await reader.ReadLineAsync(ct)) != null)
+        {
+            if (line.StartsWith("event:"))
+            {
+                eventType = line["event:".Length..].Trim();
+                continue;
+            }
+            if (!line.StartsWith("data:")) continue;
+
+            var data = line["data:".Length..].Trim();
+            if (string.IsNullOrEmpty(data)) continue;
+
+            using var doc = JsonDocument.Parse(data);
+            var root = doc.RootElement;
+
+            switch (eventType)
+            {
+                case "content_block_start":
+                {
+                    var index = root.GetProperty("index").GetInt32();
+                    var block = root.GetProperty("content_block");
+                    var blockType = block.GetProperty("type").GetString() ?? "";
+                    var sb = new StringBuilder();
+                    if (blockType == "text" && block.TryGetProperty("text", out var initialText))
+                    {
+                        sb.Append(initialText.GetString());
+                    }
+                    blocks[index] = (blockType, sb);
+                    break;
+                }
+                case "content_block_delta":
+                {
+                    var index = root.GetProperty("index").GetInt32();
+                    var delta = root.GetProperty("delta");
+                    if (delta.GetProperty("type").GetString() == "text_delta"
+                        && blocks.TryGetValue(index, out var entry))
+                    {
+                        entry.Text.Append(delta.GetProperty("text").GetString());
+                    }
+                    break;
+                }
+                case "error":
+                {
+                    var msg = root.TryGetProperty("error", out var err) && err.TryGetProperty("message", out var m)
+                        ? m.GetString()
+                        : data;
+                    throw new InvalidOperationException($"Claude API stream error: {msg}");
+                }
+            }
+        }
+
+        return blocks
+            .OrderBy(kvp => kvp.Key)
+            .Where(kvp => kvp.Value.Type == "text")
+            .Select(kvp => kvp.Value.Text.ToString())
+            .Where(s => !string.IsNullOrWhiteSpace(s))
+            .LastOrDefault() ?? "";
+    }
 }
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
index 40d6b85..9254a89 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
+++ b/CSharp/Examples/RailenginePoweredStatusPage/appsettings.json
@@ -15,7 +15,7 @@
   "Anthropic": {
     "ApiVersion": "2023-06-01",
     "Beta": "mcp-client-2025-04-04",
-    "Model": "claude-sonnet-4-6"
+    "Model": "claude-haiku-4-5-20251001"
   },
   "AllowedIPs": [ "127.0.0.1", "::1" ]
 }

From 69a4c81f9a45acdc5655a35e2a19fd30caa087ab Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 16:09:39 -0700
Subject: [PATCH 15/22] provide more info about the model and prompt choice for
 the example insights

---
 CSharp/Examples/RailenginePoweredStatusPage/README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/README.md b/CSharp/Examples/RailenginePoweredStatusPage/README.md
index d4be078..52a3a9b 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/README.md
+++ b/CSharp/Examples/RailenginePoweredStatusPage/README.md
@@ -50,6 +50,10 @@ If an `Anthropic:ApiKey` is configured, the app runs a `BackgroundService` that
 
 This demonstrates Claude autonomously deciding which Railengine tools to call (`getEngineStorageDocuments`, `searchEngineDocuments`, …) and reasoning over the results — useful as a worked example of the MCP client beta in C#. The same PAT used for the SDK is forwarded as the MCP server's bearer token.
 
+The model is configurable via `Anthropic:Model` in `appsettings.json` and defaults to `claude-haiku-4-5-20251001` for speed and cost; swap to a Sonnet or Opus identifier if you'd prefer richer prose at the expense of latency.
+
+The prompt in `Services/DailyInsightService.cs` is deliberately tuned for short, plain-text output (low `max_tokens`, "no markdown" instructions, one line per metric). If you adapt it for your own Railengine and want a longer or formatted summary, expect to relax those constraints.
+
 If `Anthropic:ApiKey` is not set, the service logs a notice and exits cleanly; the insight card simply doesn't appear.
 
 > **Heads-up for local development:** the 24-hour timer is in-memory only, so each app restart triggers a fresh generation and a corresponding Anthropic API call. If you're iterating on the app you may want to comment out `AddHostedService<DailyInsightService>()` in `Program.cs` until you're ready to test it. Once deployed to a long-running host, restarts are rare and this isn't a concern.

From 6c1751f59726a8e210f1cd4575faf097533238e4 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Wed, 6 May 2026 16:48:48 -0700
Subject: [PATCH 16/22] fix linter errors and supress linter verbose output -
 ascii art and successes

---
 .github/workflows/super-linter.yml            |  4 ++
 .../RailenginePoweredStatusPage/README.md     | 15 ++++--
 .../Services/DailyInsightService.cs           | 49 +++++++++----------
 .../wwwroot/index.html                        |  2 +-
 .../wwwroot/styles.css                        |  8 ++-
 5 files changed, 48 insertions(+), 30 deletions(-)

diff --git a/.github/workflows/super-linter.yml b/.github/workflows/super-linter.yml
index 7915c66..7f4aa73 100644
--- a/.github/workflows/super-linter.yml
+++ b/.github/workflows/super-linter.yml
@@ -39,3 +39,7 @@ jobs:
           VALIDATE_TYPESCRIPT_STANDARD: false
           DEFAULT_BRANCH: "main"
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # Suppress per-file "successfully linted" INFO lines and tool banners.
+          # Only WARN/ERROR output is shown. Switch back to VERBOSE if you need
+          # to debug which files a linter is touching.
+          LOG_LEVEL: ERROR
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/README.md b/CSharp/Examples/RailenginePoweredStatusPage/README.md
index 52a3a9b..3e99c7d 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/README.md
+++ b/CSharp/Examples/RailenginePoweredStatusPage/README.md
@@ -4,7 +4,11 @@ A minimal ASP.NET Core web app that demonstrates using the [Railengine](https://
 
 ## What it does
 
-The app exposes a `/api/metrics` endpoint that queries Railengine for metric records, then serves a status page that renders the results as one Chart.js line chart per configured metric. Each card header shows the most recent value with its unit, rounded to 2 decimal places. The page fetches updated data every 5 minutes (configurable via `REFRESH_INTERVAL_MS` in `wwwroot/index.html`) and updates the charts in place — no full page reload.
+The app exposes a `/api/metrics` endpoint that queries Railengine for metric records, then
+serves a status page that renders the results as one Chart.js line chart per configured metric.
+Each card header shows the most recent value with its unit, rounded to 2 decimal places. The
+page fetches updated data every 5 minutes (configurable via `REFRESH_INTERVAL_MS` in
+`wwwroot/index.html`) and updates the charts in place — no full page reload.
 
 ## Expected metric shape
 
@@ -46,13 +50,18 @@ Cards are generated from this list at page load, so adding, removing, renaming,
 
 ## Daily insight (optional)
 
-If an `Anthropic:ApiKey` is configured, the app runs a `BackgroundService` that wakes once every 24 hours, calls the Claude API with the engine's [Railengine MCP server](https://cndr.railtown.ai/api/mcp/engine/{EngineId}) attached as a tool source, and asks Claude to review the recent metric data. The result is exposed at `/api/insight` and rendered as a "Daily Insight" card above the charts, with a "generated Xh ago" timestamp.
+If an `Anthropic:ApiKey` is configured, the app runs a `BackgroundService` that wakes once every
+24 hours, calls the Claude API with the engine's
+[Railengine MCP server](https://cndr.railtown.ai/api/mcp/engine/{EngineId}) attached as a tool
+source, and asks Claude to review the recent metric data. The result is exposed at
+`/api/insight` and rendered as a "Daily Insight" card above the charts, with a "generated Xh
+ago" timestamp.
 
 This demonstrates Claude autonomously deciding which Railengine tools to call (`getEngineStorageDocuments`, `searchEngineDocuments`, …) and reasoning over the results — useful as a worked example of the MCP client beta in C#. The same PAT used for the SDK is forwarded as the MCP server's bearer token.
 
 The model is configurable via `Anthropic:Model` in `appsettings.json` and defaults to `claude-haiku-4-5-20251001` for speed and cost; swap to a Sonnet or Opus identifier if you'd prefer richer prose at the expense of latency.
 
-The prompt in `Services/DailyInsightService.cs` is deliberately tuned for short, plain-text output (low `max_tokens`, "no markdown" instructions, one line per metric). If you adapt it for your own Railengine and want a longer or formatted summary, expect to relax those constraints.
+The prompt in `Services/DailyInsightService.cs` is deliberately tuned for short, plain-text output (low `max_tokens`, "no Markdown" instructions, one line per metric). If you adapt it for your own Railengine and want a longer or formatted summary, expect to relax those constraints.
 
 If `Anthropic:ApiKey` is not set, the service logs a notice and exits cleanly; the insight card simply doesn't appear.
 
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs b/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs
index 2edf56d..9e6fb83 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Services/DailyInsightService.cs
@@ -1,4 +1,3 @@
-using System.Net.Http.Json;
 using System.Text;
 using System.Text.Json;
 
@@ -162,36 +161,36 @@ private static async Task<string> ReadTextFromStreamAsync(HttpResponseMessage re
             switch (eventType)
             {
                 case "content_block_start":
-                {
-                    var index = root.GetProperty("index").GetInt32();
-                    var block = root.GetProperty("content_block");
-                    var blockType = block.GetProperty("type").GetString() ?? "";
-                    var sb = new StringBuilder();
-                    if (blockType == "text" && block.TryGetProperty("text", out var initialText))
                     {
-                        sb.Append(initialText.GetString());
+                        var index = root.GetProperty("index").GetInt32();
+                        var block = root.GetProperty("content_block");
+                        var blockType = block.GetProperty("type").GetString() ?? "";
+                        var sb = new StringBuilder();
+                        if (blockType == "text" && block.TryGetProperty("text", out var initialText))
+                        {
+                            sb.Append(initialText.GetString());
+                        }
+                        blocks[index] = (blockType, sb);
+                        break;
                     }
-                    blocks[index] = (blockType, sb);
-                    break;
-                }
                 case "content_block_delta":
-                {
-                    var index = root.GetProperty("index").GetInt32();
-                    var delta = root.GetProperty("delta");
-                    if (delta.GetProperty("type").GetString() == "text_delta"
-                        && blocks.TryGetValue(index, out var entry))
                     {
-                        entry.Text.Append(delta.GetProperty("text").GetString());
+                        var index = root.GetProperty("index").GetInt32();
+                        var delta = root.GetProperty("delta");
+                        if (delta.GetProperty("type").GetString() == "text_delta"
+                            && blocks.TryGetValue(index, out var entry))
+                        {
+                            entry.Text.Append(delta.GetProperty("text").GetString());
+                        }
+                        break;
                     }
-                    break;
-                }
                 case "error":
-                {
-                    var msg = root.TryGetProperty("error", out var err) && err.TryGetProperty("message", out var m)
-                        ? m.GetString()
-                        : data;
-                    throw new InvalidOperationException($"Claude API stream error: {msg}");
-                }
+                    {
+                        var msg = root.TryGetProperty("error", out var err) && err.TryGetProperty("message", out var m)
+                            ? m.GetString()
+                            : data;
+                        throw new InvalidOperationException($"Claude API stream error: {msg}");
+                    }
             }
         }
 
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
index 3026ae0..14d78fd 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
@@ -5,9 +5,9 @@
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
   <title>railtown.ai system metrics</title>
   <link rel="stylesheet" href="styles.css" />
-  <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
 </head>
 <body>
+  <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
   <h1>railtown.ai system metrics</h1>
 
   <section class="insight" hidden>
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
index c0efb70..e94570b 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
@@ -1,4 +1,10 @@
-*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
+*,
+*::before,
+*::after {
+  box-sizing: border-box;
+  margin: 0;
+  padding: 0;
+}
 
 body {
   font-family: system-ui, sans-serif;

From 6c5fcf246e399eabc8a48498337692ed2e7a23e2 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Thu, 7 May 2026 10:00:35 -0700
Subject: [PATCH 17/22] added external metric sources to supplement the
 railengine metrics, minor CSS tweaks for better contrast

---
 .../.config/dotnet-tools.json                 | 13 ++++++
 .../Controllers/MetricsController.cs          | 22 ++++++----
 .../Models/PyPiRecentResponse.cs              | 21 ++++++++++
 .../RailenginePoweredStatusPage/Program.cs    |  1 +
 .../RailenginePoweredStatusPage/README.md     | 33 +++++++++++++++
 .../Services/IExternalMetricSource.cs         |  8 ++++
 .../Services/PyPiDownloadsSource.cs           | 40 +++++++++++++++++++
 .../wwwroot/index.html                        | 17 +++++---
 .../wwwroot/styles.css                        |  7 ++++
 9 files changed, 149 insertions(+), 13 deletions(-)
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/.config/dotnet-tools.json
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Models/PyPiRecentResponse.cs
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Services/IExternalMetricSource.cs
 create mode 100644 CSharp/Examples/RailenginePoweredStatusPage/Services/PyPiDownloadsSource.cs

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/.config/dotnet-tools.json b/CSharp/Examples/RailenginePoweredStatusPage/.config/dotnet-tools.json
new file mode 100644
index 0000000..ce0aab7
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/.config/dotnet-tools.json
@@ -0,0 +1,13 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "dotnet-ef": {
+      "version": "10.0.7",
+      "commands": [
+        "dotnet-ef"
+      ],
+      "rollForward": false
+    }
+  }
+}
\ No newline at end of file
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
index 3217060..8fd3a10 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Mvc;
 using Railengine;
 using RailenginePoweredStatusPage.Models;
+using RailenginePoweredStatusPage.Services;
 
 namespace RailenginePoweredStatusPage.Controllers;
 
@@ -10,22 +11,29 @@ public class MetricsController : ControllerBase
 {
     private readonly RailengineClient railengineClient;
     private readonly Guid engineId;
+    private readonly IEnumerable<IExternalMetricSource> externalSources;
 
-    public MetricsController(RailengineClient railengineClient, IConfiguration configuration)
+    public MetricsController(RailengineClient railengineClient, IConfiguration configuration, IEnumerable<IExternalMetricSource> externalSources)
     {
         this.railengineClient = railengineClient;
+        this.externalSources = externalSources;
         engineId = Guid.Parse(configuration["RailEngine:EngineId"]!);
     }
 
     [HttpGet]
     public async Task<ActionResult<List<MetricRecord>>> GetMetrics()
     {
-        var results = await railengineClient.ListStorageDocuments<MetricRecord>(
-            engineId,
-            pageNumber: 1,
-            pageSize: 100
-        );
+        var page1 = await railengineClient.ListStorageDocuments<MetricRecord>(engineId, pageNumber: 1, pageSize: 100);
+        var page2 = await railengineClient.ListStorageDocuments<MetricRecord>(engineId, pageNumber: 2, pageSize: 100);
 
-        return Ok(results.Items.Select(i => i.Document).ToList());
+        var railengineRecords = page1.Items.Concat(page2.Items)
+            .Select(i => i.Document)
+            .OrderByDescending(r => r.Timestamp)
+            .Take(144);
+
+        var externalTasks = externalSources.Select(s => s.GetRecordsAsync());
+        var externalRecords = (await Task.WhenAll(externalTasks)).SelectMany(r => r);
+
+        return Ok(railengineRecords.Concat(externalRecords).ToList());
     }
 }
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Models/PyPiRecentResponse.cs b/CSharp/Examples/RailenginePoweredStatusPage/Models/PyPiRecentResponse.cs
new file mode 100644
index 0000000..418efb1
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Models/PyPiRecentResponse.cs
@@ -0,0 +1,21 @@
+using System.Text.Json.Serialization;
+
+namespace RailenginePoweredStatusPage.Models;
+
+public class PyPiOverallResponse
+{
+    [JsonPropertyName("data")]
+    public List<PyPiOverallEntry> Data { get; set; } = [];
+}
+
+public class PyPiOverallEntry
+{
+    [JsonPropertyName("category")]
+    public string Category { get; set; } = string.Empty;
+
+    [JsonPropertyName("date")]
+    public string Date { get; set; } = string.Empty;
+
+    [JsonPropertyName("downloads")]
+    public double Downloads { get; set; }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Program.cs b/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
index 275bfbb..05f96f5 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Program.cs
@@ -15,6 +15,7 @@
 });
 builder.Services.AddSingleton<DailyInsight>();
 builder.Services.AddHostedService<DailyInsightService>();
+builder.Services.AddTransient<IExternalMetricSource, PyPiDownloadsSource>();
 
 var app = builder.Build();
 
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/README.md b/CSharp/Examples/RailenginePoweredStatusPage/README.md
index 3e99c7d..b5beb85 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/README.md
+++ b/CSharp/Examples/RailenginePoweredStatusPage/README.md
@@ -48,6 +48,39 @@ Each entry:
 
 Cards are generated from this list at page load, so adding, removing, renaming, or recoloring a metric is a one-line change. The page title and `<h1>` heading are still hardcoded in `wwwroot/index.html` if you want to rebrand those too.
 
+## Adding external metrics
+
+The app supports non-Railengine metric sources via the `IExternalMetricSource` interface in `Services/IExternalMetricSource.cs`:
+
+```csharp
+public interface IExternalMetricSource
+{
+    Task<IEnumerable<MetricRecord>> GetRecordsAsync();
+}
+```
+
+Implement this interface to pull data from any external API and shape it into `MetricRecord` objects. The built-in example is `PyPiDownloadsSource`, which fetches daily download counts for a PyPI package from the [pypistats.org API](https://pypistats.org/api):
+
+```csharp
+public class PyPiDownloadsSource : IExternalMetricSource
+{
+    // Returns the last 30 days of daily downloads as MetricRecords
+}
+```
+
+To add a new source:
+
+1. Create a class that implements `IExternalMetricSource`
+2. Register it in `Program.cs`:
+   ```csharp
+   builder.Services.AddTransient<IExternalMetricSource, YourSource>();
+   ```
+3. Add a corresponding entry to the `METRICS` array in `wwwroot/index.html`, using a `key` that matches the `metric` field your source returns
+
+The `MetricsController` injects all registered `IExternalMetricSource` implementations and merges their records with the Railengine data before returning from `/api/metrics`.
+
+> **Note:** External metrics are display-only. The daily insight is generated by Claude querying Railengine directly via MCP — it has no awareness of external sources and will not include them in its analysis.
+
 ## Daily insight (optional)
 
 If an `Anthropic:ApiKey` is configured, the app runs a `BackgroundService` that wakes once every
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Services/IExternalMetricSource.cs b/CSharp/Examples/RailenginePoweredStatusPage/Services/IExternalMetricSource.cs
new file mode 100644
index 0000000..54b3b1b
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Services/IExternalMetricSource.cs
@@ -0,0 +1,8 @@
+using RailenginePoweredStatusPage.Models;
+
+namespace RailenginePoweredStatusPage.Services;
+
+public interface IExternalMetricSource
+{
+    Task<IEnumerable<MetricRecord>> GetRecordsAsync();
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Services/PyPiDownloadsSource.cs b/CSharp/Examples/RailenginePoweredStatusPage/Services/PyPiDownloadsSource.cs
new file mode 100644
index 0000000..dd7599e
--- /dev/null
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Services/PyPiDownloadsSource.cs
@@ -0,0 +1,40 @@
+using System.Net.Http.Json;
+using RailenginePoweredStatusPage.Models;
+
+namespace RailenginePoweredStatusPage.Services;
+
+public class PyPiDownloadsSource : IExternalMetricSource
+{
+    private readonly IHttpClientFactory httpClientFactory;
+    private readonly string package;
+
+    public PyPiDownloadsSource(IHttpClientFactory httpClientFactory, IConfiguration configuration)
+    {
+        this.httpClientFactory = httpClientFactory;
+        package = configuration["PyPi:Package"] ?? "railtracks";
+    }
+
+    public async Task<IEnumerable<MetricRecord>> GetRecordsAsync()
+    {
+        var client = httpClientFactory.CreateClient();
+        var httpResponse = await client.GetAsync(
+            $"https://pypistats.org/api/packages/{package}/overall");
+
+        if (!httpResponse.IsSuccessStatusCode) return [];
+
+        var response = await httpResponse.Content.ReadFromJsonAsync<PyPiOverallResponse>();
+
+        if (response?.Data == null) return [];
+
+        return response.Data
+            .Where(e => e.Category == "without_mirrors")
+            .OrderByDescending(e => e.Date)
+            .Take(30)
+            .Select(e => new MetricRecord
+            {
+                Metric = "pypi-downloads",
+                Timestamp = DateTimeOffset.Parse(e.Date).ToUnixTimeMilliseconds(),
+                Value = e.Downloads,
+            });
+    }
+}
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
index 14d78fd..10cfca6 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
@@ -37,9 +37,10 @@ <h2>Daily Insight <span class="insight-meta"></span></h2>
     //                whose value matches the previous one. Useful for metrics that
     //                report constantly and you only want to highlight changes.
     const METRICS = [
-      { key: 'engine-load',  label: 'Railengine',    unit: 'bytes/min', color: '#6366f1' },
-      { key: 'team-members', label: 'Users',         unit: 'users',     color: '#22d3ee', hideRepeats: true },
-      { key: 'logs',         label: 'Conductr Logs', unit: 'logs/min',  color: '#34d399' },
+      { key: 'engine-load',    label: 'Railengine',           unit: 'bytes/min',     color: '#6366f1', interval: '12h' },
+      { key: 'team-members',  label: 'Users',                unit: 'users',         color: '#22d3ee', interval: '12h', hideRepeats: true },
+      { key: 'logs',          label: 'Conductr Logs',        unit: 'logs/min',      color: '#34d399', interval: '12h' },
+      { key: 'pypi-downloads', label: 'railtracks Downloads', unit: 'downloads/day', color: '#f59e0b', interval: '30d' },
     ];
 
     const REFRESH_INTERVAL_MS = 5 * 60 * 1000;
@@ -55,12 +56,16 @@ <h2>Daily Insight <span class="insight-meta"></span></h2>
         latest.className = 'latest';
         heading.append(latest);
 
+        const intervalEl = document.createElement('p');
+        intervalEl.className = 'card-interval';
+        intervalEl.textContent = metric.interval ?? '';
+
         const wrap = document.createElement('div');
         wrap.className = 'chart-wrap';
         const canvas = document.createElement('canvas');
         wrap.append(canvas);
 
-        card.append(heading, wrap);
+        card.append(heading, intervalEl, wrap);
         container.append(card);
 
         metric.latestEl = latest;
@@ -105,8 +110,8 @@ <h2>Daily Insight <span class="insight-meta"></span></h2>
           maintainAspectRatio: false,
           plugins: { legend: { display: false } },
           scales: {
-            x: { ticks: { color: '#64748b' }, grid: { color: '#2d3248' } },
-            y: { ticks: { color: '#64748b' }, grid: { color: '#2d3248' } },
+            x: { ticks: { color: '#94a3b8' }, grid: { color: '#3a4060' } },
+            y: { ticks: { color: '#94a3b8' }, grid: { color: '#3a4060' } },
           },
         },
       });
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
index e94570b..cdb4d94 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
@@ -93,6 +93,13 @@ h1 {
   color: #f8fafc;
 }
 
+.card-interval {
+  font-size: 0.75rem;
+  color: #64748b;
+  margin-top: -0.5rem;
+  margin-bottom: 0.75rem;
+}
+
 .chart-wrap {
   position: relative;
   height: 220px;

From 7b5e75c9357c0f7461270810d6fcb938114b8c84 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Thu, 7 May 2026 14:11:01 -0700
Subject: [PATCH 18/22] improved logo styles

---
 .../RailenginePoweredStatusPage/wwwroot/styles.css         | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
index cdb4d94..37990b8 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
@@ -116,9 +116,9 @@ h1 {
   align-items: center;
   justify-content: center;
   gap: 0.6rem;
-  margin-top: 3rem;
-  color: #64748b;
-  font-size: 0.8rem;
+  margin-top: 2.9rem;
+  color: #CCC;
+  font-size: 0.9rem;
   letter-spacing: 0.05em;
 }
 
@@ -127,6 +127,5 @@ h1 {
   width: auto;
   display: block;
   background: #e2e8f0;
-  padding: 0.6rem 1.2rem;
   border-radius: 6px;
 }

From fddba5c478d422cdcef701a6af2c00aa9ddb8793 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Thu, 7 May 2026 14:52:04 -0700
Subject: [PATCH 19/22] fixed linter error

---
 CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
index 37990b8..9466bad 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
@@ -117,7 +117,7 @@ h1 {
   justify-content: center;
   gap: 0.6rem;
   margin-top: 2.9rem;
-  color: #CCC;
+  color: #ccc;
   font-size: 0.9rem;
   letter-spacing: 0.05em;
 }

From 91803b136dd2c0ba96c4df371aa430dbfb257526 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Thu, 7 May 2026 15:28:32 -0700
Subject: [PATCH 20/22] handle null metric values and timestamps

---
 .../Controllers/MetricsController.cs                          | 1 +
 .../RailenginePoweredStatusPage/Models/MetricRecord.cs        | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
index 8fd3a10..8a89b71 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Controllers/MetricsController.cs
@@ -28,6 +28,7 @@ public async Task<ActionResult<List<MetricRecord>>> GetMetrics()
 
         var railengineRecords = page1.Items.Concat(page2.Items)
             .Select(i => i.Document)
+            .Where(r => r.Timestamp.HasValue && r.Value.HasValue)
             .OrderByDescending(r => r.Timestamp)
             .Take(144);
 
diff --git a/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs b/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs
index 3c5bf83..7ab496f 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs
+++ b/CSharp/Examples/RailenginePoweredStatusPage/Models/MetricRecord.cs
@@ -8,8 +8,8 @@ public class MetricRecord
     public string Metric { get; set; } = string.Empty;
 
     [JsonPropertyName("timestamp")]
-    public long Timestamp { get; set; }
+    public long? Timestamp { get; set; }
 
     [JsonPropertyName("value")]
-    public double Value { get; set; }
+    public double? Value { get; set; }
 }

From b0cc8c576c50e8199d16448639091a708f05b445 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Thu, 7 May 2026 15:30:46 -0700
Subject: [PATCH 21/22] more compact styles to fit lower res screens

---
 .../RailenginePoweredStatusPage/wwwroot/styles.css   | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
index 9466bad..44f258d 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/styles.css
@@ -17,7 +17,7 @@ body {
 h1 {
   font-size: 1.5rem;
   font-weight: 600;
-  margin-bottom: 2rem;
+  margin-bottom: 1rem;
   color: #f8fafc;
 }
 
@@ -25,8 +25,8 @@ h1 {
   background: #1e2130;
   border: 1px solid #2d3248;
   border-radius: 12px;
-  padding: 1.5rem;
-  margin-bottom: 1.5rem;
+  padding: 1rem;
+  margin-bottom: 1rem;
 }
 
 .insight h2 {
@@ -70,7 +70,7 @@ h1 {
   background: #1e2130;
   border: 1px solid #2d3248;
   border-radius: 12px;
-  padding: 1.5rem;
+  padding: 1rem;
 }
 
 .card h2 {
@@ -87,7 +87,7 @@ h1 {
 }
 
 .card h2 .latest {
-  font-size: 1.25rem;
+  font-size: 0.75rem;
   font-weight: 600;
   letter-spacing: 0;
   color: #f8fafc;
@@ -116,7 +116,7 @@ h1 {
   align-items: center;
   justify-content: center;
   gap: 0.6rem;
-  margin-top: 2.9rem;
+  margin-top: 1rem;
   color: #ccc;
   font-size: 0.9rem;
   letter-spacing: 0.05em;

From ac45fad9c60cd6b47ba333d66b5d920296670cc9 Mon Sep 17 00:00:00 2001
From: Matthew Boulton <matthew@railtown.ai>
Date: Thu, 7 May 2026 15:37:32 -0700
Subject: [PATCH 22/22] added additional sample metrics

---
 .../RailenginePoweredStatusPage/wwwroot/index.html        | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
index 10cfca6..6202429 100644
--- a/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
+++ b/CSharp/Examples/RailenginePoweredStatusPage/wwwroot/index.html
@@ -37,10 +37,12 @@ <h2>Daily Insight <span class="insight-meta"></span></h2>
     //                whose value matches the previous one. Useful for metrics that
     //                report constantly and you only want to highlight changes.
     const METRICS = [
-      { key: 'engine-load',    label: 'Railengine',           unit: 'bytes/min',     color: '#6366f1', interval: '12h' },
-      { key: 'team-members',  label: 'Users',                unit: 'users',         color: '#22d3ee', interval: '12h', hideRepeats: true },
+      { key: 'engine-count', label: 'Railengines', unit: 'engines', color: '#ce49ff', interval: '12h', hideRepeats: true },
+      { key: 'engine-load', label: 'Railengine Load', unit: 'bytes/min', color: '#6366f1', interval: '12h' },
+      { key: 'team-members', label: 'Conductr Users',                unit: 'users',         color: '#22d3ee', interval: '12h', hideRepeats: true },
       { key: 'logs',          label: 'Conductr Logs',        unit: 'logs/min',      color: '#34d399', interval: '12h' },
-      { key: 'pypi-downloads', label: 'railtracks Downloads', unit: 'downloads/day', color: '#f59e0b', interval: '30d' },
+      { key: 'pypi-downloads', label: 'Railtracks Downloads', unit: 'downloads/day', color: '#f59e0b', interval: '30d' },
+      { key: 'agent-run-count', label: 'Railtracks Runs', unit: 'runs', color: '#7f0000', interval: '12h' },
     ];
 
     const REFRESH_INTERVAL_MS = 5 * 60 * 1000;