feat: metric definitions glossary + IPEDS/state cross-walks (#105)

codebenders-dashboard/app/glossary/page.tsx

@@ -0,0 +1,117 @@
+import Link from "next/link"
+import {
+  buildGlossaryTopicBlocks,
+  formatGlossarySlugForDisplay,
+  parseGlossaryEntries,
+  readMetricGlossaryMarkdown,
+} from "@/lib/metric-glossary"
+
+const BOLD_LEAD_PARAGRAPH = /^\*\*([^*]+)\*\*:\s*([\s\S]*)$/
+
+function GlossaryBody({ text }: { text: string }) {
+  const paragraphs = text.split(/\n\n+/).filter(Boolean)
+  return (
+    <div className="space-y-3 text-sm text-muted-foreground">
+      {paragraphs.map((p, i) => {
+        const boldLead = BOLD_LEAD_PARAGRAPH.exec(p)
+        if (boldLead) {
+          return (
+            <p key={i}>
+              <span className="font-medium text-foreground">{boldLead[1]}:</span> {boldLead[2]}
+            </p>
+          )
+        }
+        return <p key={i}>{p}</p>
+      })}
+    </div>
+  )
+}
+
+export default function GlossaryPage() {
+  const md = readMetricGlossaryMarkdown()
+  const entries = parseGlossaryEntries(md)
+  const topicBlocks = buildGlossaryTopicBlocks(entries)
+  const alphaSlugs = Object.keys(entries).sort((a, b) => a.localeCompare(b))
+
+  return (
+    <div className="min-h-screen bg-background">
+      <div className="container mx-auto max-w-4xl p-6 space-y-10">
+        <header className="space-y-2 border-b border-border pb-6">
+          <h1 className="text-3xl font-bold tracking-tight">Metric glossary</h1>
+          <p className="text-muted-foreground">
+            In-context definitions for dashboard KPIs, with PDP field notes and high-level IPEDS / state
+            cross-walks. Source:{" "}
+            <code className="text-xs bg-muted px-1 py-0.5 rounded">content/metric-glossary.md</code>
+          </p>
+          <p className="text-sm text-muted-foreground">
+            <Link href="/" className="text-primary underline-offset-4 hover:underline">
+              Back to dashboard
+            </Link>
+            {" · "}
+            <Link href="/methodology" className="text-primary underline-offset-4 hover:underline">
+              Methodology
+            </Link>
+          </p>
+        </header>
+
+        <nav aria-label="On this page" className="rounded-lg border border-border bg-muted/30 p-4 space-y-3">
+          <h2 className="text-sm font-semibold text-foreground">By topic</h2>
+          <ul className="flex flex-wrap gap-x-4 gap-y-1 text-sm">
+            {topicBlocks.map((t) => (
+              <li key={t.id}>
+                <a href={`#topic-${t.id}`} className="text-primary underline-offset-4 hover:underline">
+                  {t.label}
+                </a>
+              </li>
+            ))}
+          </ul>
+          <h2 className="text-sm font-semibold text-foreground pt-2">A–Z</h2>
+          <ul className="flex flex-wrap gap-x-3 gap-y-1 text-xs font-mono text-muted-foreground">
+            {alphaSlugs.map((slug) => (
+              <li key={slug}>
+                <a href={`#${slug}`} className="hover:text-foreground underline-offset-2 hover:underline">
+                  {formatGlossarySlugForDisplay(slug)}
+                </a>
+              </li>
+            ))}
+          </ul>
+        </nav>
+
+        {topicBlocks.map((topic) => (
+          <section key={topic.id} id={`topic-${topic.id}`} className="space-y-6 scroll-mt-20">
+            <h2 className="text-xl font-semibold tracking-tight border-b border-border pb-2">{topic.label}</h2>
+            {topic.slugs.map((slug) => {
+              const body = entries[slug]!
+              const title = formatGlossarySlugForDisplay(slug)
+              return (
+                <article key={slug} id={slug} className="scroll-mt-20 space-y-2 rounded-lg border border-border p-5">
+                  <h3 className="text-lg font-medium capitalize">{title}</h3>
+                  <GlossaryBody text={body} />
+                </article>
+              )
+            })}
+          </section>
+        ))}
+
+        <footer className="text-xs text-muted-foreground border-t border-border pt-6">
+          <p>
+            Epic tracking:{" "}
+            <a
+              href="https://github.com/devcolor/codebenders-datathon/issues/124"
+              className="text-primary underline-offset-4 hover:underline"
+            >
+              #124 AASCU convening follow-ups
+            </a>
+            {" · "}Issue{" "}
+            <a
+              href="https://github.com/devcolor/codebenders-datathon/issues/105"
+              className="text-primary underline-offset-4 hover:underline"
+            >
+              #105
+            </a>
+          </p>
+        </footer>
+      </div>
+    </div>
+  )
+}

codebenders-dashboard/app/page.tsx

@@ -16,6 +16,7 @@ import {
 } from "@/components/ui/select"
 import { TrendingUp, Users, AlertTriangle, BookOpen, Search, Table2, X } from "lucide-react"
 import Link from "next/link"
+import { GLOSSARY_HREF } from "@/lib/glossary-constants"
 
 interface KPIData {
   overallRetentionRate: string
@@ -275,6 +276,11 @@ export default function DashboardPage() {
                 <p><strong>What it shows:</strong> Percentage of students retained year-to-year based on historical data.</p>
                 <p className="mt-2"><strong>Data source:</strong> Retention field from student cohort records (0=Not Retained, 1=Retained).</p>
                 <p className="mt-2"><strong>Use for:</strong> Baseline institutional performance metric.</p>
+                <p className="mt-3">
+                  <Link href={`${GLOSSARY_HREF}#overall-retention-rate`} className="text-primary underline-offset-4 hover:underline text-xs font-medium">
+                    Full glossary entry (PDP / IPEDS cross-walk) →
+                  </Link>
+                </p>
               </>
             }
           />
@@ -295,6 +301,11 @@ export default function DashboardPage() {
                   <li>First Year GPA (2.9%)</li>
                 </ul>
                 <p className="mt-2"><strong>Use for:</strong> Early identification of at-risk students for proactive intervention.</p>
+                <p className="mt-3">
+                  <Link href={`${GLOSSARY_HREF}#avg-predicted-retention`} className="text-primary underline-offset-4 hover:underline text-xs font-medium">
+                    Full glossary entry (PDP / IPEDS cross-walk) →
+                  </Link>
+                </p>
               </>
             }
           />
@@ -319,6 +330,11 @@ export default function DashboardPage() {
                   <li><strong>HIGH:</strong> Priority intervention</li>
                 </ul>
                 <p className="mt-2"><strong>Recommended actions:</strong> Immediate advisor outreach, financial aid review, tutoring referrals.</p>
+                <p className="mt-3">
+                  <Link href={`${GLOSSARY_HREF}#students-at-high-critical-risk`} className="text-primary underline-offset-4 hover:underline text-xs font-medium">
+                    Full glossary entry (PDP / IPEDS cross-walk) →
+                  </Link>
+                </p>
               </>
             }
           />
@@ -339,6 +355,11 @@ export default function DashboardPage() {
                   <li>&lt;50%: Critical - failing nearly half of courses</li>
                 </ul>
                 <p className="mt-2"><strong>Why it matters:</strong> Strong predictor of retention and credential completion.</p>
+                <p className="mt-3">
+                  <Link href={`${GLOSSARY_HREF}#avg-course-completion`} className="text-primary underline-offset-4 hover:underline text-xs font-medium">
+                    Full glossary entry (PDP / IPEDS cross-walk) →
+                  </Link>
+                </p>
               </>
             }
           />

codebenders-dashboard/components/nav-header.tsx

@@ -6,6 +6,7 @@ import { GraduationCap, LogOut } from "lucide-react"
 import { Button } from "@/components/ui/button"
 import { signOut } from "@/app/actions/auth"
 import { AI_TRANSPARENCY_HREF } from "@/content/ai-transparency"
+import { GLOSSARY_HREF } from "@/lib/glossary-constants"
 import { ROLE_COLORS, ROLE_LABELS, type Role } from "@/lib/roles"
 
 interface NavHeaderProps {
@@ -15,6 +16,7 @@ interface NavHeaderProps {
 
 const NAV_LINKS: Array<{ href: string; label: string; roles?: Role[] }> = [
   { href: "/", label: "Dashboard" },
+  { href: GLOSSARY_HREF, label: "Glossary" },
   { href: "/courses", label: "Courses" },
   { href: "/students", label: "Students" },
   { href: "/query", label: "Query" },

codebenders-dashboard/content/metric-glossary.md

@@ -0,0 +1,51 @@
+# Metric glossary
+
+Single source of truth for dashboard KPI definitions. Each section is keyed by its URL anchor (e.g. `/glossary#overall-retention-rate`). Cross-walks are indicative — institutions should confirm against their PDP documentation, IPEDS submission manuals, and state reporting rules.
+
+---
+
+## overall-retention-rate
+
+**Plain English:** Share of students in the selected cohort who are still enrolled (or completed) one year later — a common “year-to-year” retention view for the students you are filtering.
+
+**PDP / analysis-ready:** Uses the cohort retention indicator on `student_level_with_predictions` (historical `Retention` field: 0 = not retained to the next year, 1 = retained) after filters (cohort, enrollment intensity, credential goal) are applied.
+
+**IPEDS:** Closest published analog is *Fall cohort retention* for first-time full-time students; PDP cohorts may include part-time or mixed populations, so percentages will not match IPEDS one-to-one without aligning cohort definitions.
+
+**State compliance:** Many state accountability dashboards publish “first-year retention” or “persistence”; map this metric to the state field that uses the same cohort and time window.
+
+---
+
+## avg-predicted-retention
+
+**Plain English:** Average of the model’s estimated probability (0–100%) that each student in the filtered set will retain — not the same as historical retention above.
+
+**PDP / analysis-ready:** Mean of `retention_probability` from the deployed XGBoost retention model on `student_level_with_predictions`.
+
+**IPEDS:** No direct IPEDS submission — this is an institutional analytics prediction, not an audited outcome count.
+
+**State compliance:** Treat as early-warning / planning metric unless your state explicitly allows predictive indicators in reporting.
+
+---
+
+## students-at-high-critical-risk
+
+**Plain English:** Count of students whose composite risk score places them in the **HIGH** or **URGENT** alert bands used for intervention triage.
+
+**PDP / analysis-ready:** Derived from `at_risk_alert` and related thresholds on `student_level_with_predictions` (see dashboard methodology for the composite formula).
+
+**IPEDS:** Not an IPEDS field; comparable to internal early-alert counts only.
+
+**State compliance:** Use for operations; confirm before exporting small subgroup counts externally (FERPA / small-N policies).
+
+---
+
+## avg-course-completion
+
+**Plain English:** Credits successfully completed divided by credits attempted, expressed as a percentage, aggregated across students in the filter.
+
+**PDP / analysis-ready:** Computed from course completion fields on `student_level_with_predictions` (credits attempted vs. earned in the modeled year window).
+
+**IPEDS:** Conceptually related to success rates and progression, but IPEDS collects many distinct measures (e.g., completions by award) — do not assume identity without a written cross-walk.
+
+**State compliance:** Often parallels “success rate” or “credit completion ratio” in performance funding models; verify denominator rules match your state formula.

codebenders-dashboard/lib/__tests__/metric-glossary-coverage.test.ts

@@ -0,0 +1,26 @@
+import { describe, expect, it } from "vitest"
+import {
+  DASHBOARD_KPI_GLOSSARY_SLUGS,
+  GLOSSARY_TOPIC_SECTIONS,
+} from "@/lib/glossary-constants"
+import { parseGlossaryEntries, readMetricGlossaryMarkdown } from "@/lib/metric-glossary"
+
+describe("metric glossary coverage (#105)", () => {
+  it("includes every dashboard KPI slug in metric-glossary.md", () => {
+    const md = readMetricGlossaryMarkdown()
+    const entries = parseGlossaryEntries(md)
+    for (const slug of DASHBOARD_KPI_GLOSSARY_SLUGS) {
+      expect(entries[slug], `missing ## ${slug} in content/metric-glossary.md`).toBeTruthy()
+      expect(entries[slug]!.length).toBeGreaterThan(20)
+    }
+  })
+
+  it("topic sections list each KPI slug exactly once", () => {
+    const listed = GLOSSARY_TOPIC_SECTIONS.flatMap((t) => [...t.slugOrder])
+    expect(listed.length).toBe(DASHBOARD_KPI_GLOSSARY_SLUGS.length)
+    for (const slug of DASHBOARD_KPI_GLOSSARY_SLUGS) {
+      const n = listed.filter((s) => s === slug).length
+      expect(n, `slug ${slug} should appear once in GLOSSARY_TOPIC_SECTIONS`).toBe(1)
+    }
+  })
+})

codebenders-dashboard/lib/glossary-constants.ts

@@ -0,0 +1,42 @@
+/** Nav and deep links — safe to import from client components. */
+
+export const GLOSSARY_HREF = "/glossary" as const
+
+/**
+ * Source of truth for topic groupings and KPI slug order on the glossary page.
+ * `DASHBOARD_KPI_GLOSSARY_SLUGS` is derived from this list; every `##` section in
+ * `content/metric-glossary.md` must stay in sync (see
+ * `lib/__tests__/metric-glossary-coverage.test.ts`).
+ */
+const GLOSSARY_TOPIC_SECTIONS_RAW = [
+  {
+    id: "retention",
+    label: "Retention, risk & predictions",
+    slugOrder: [
+      "overall-retention-rate",
+      "avg-predicted-retention",
+      "students-at-high-critical-risk",
+    ] as const,
+  },
+  {
+    id: "completion",
+    label: "Completion & course success",
+    slugOrder: ["avg-course-completion"] as const,
+  },
+] as const
+
+export type DashboardKpiGlossarySlug =
+  (typeof GLOSSARY_TOPIC_SECTIONS_RAW)[number]["slugOrder"][number]
+
+export const DASHBOARD_KPI_GLOSSARY_SLUGS: readonly DashboardKpiGlossarySlug[] =
+  GLOSSARY_TOPIC_SECTIONS_RAW.flatMap((topic) => [...topic.slugOrder])
+
+export const GLOSSARY_TOPIC_SECTIONS: {
+  id: string
+  label: string
+  slugOrder: readonly DashboardKpiGlossarySlug[]
+}[] = GLOSSARY_TOPIC_SECTIONS_RAW.map((topic) => ({
+  id: topic.id,
+  label: topic.label,
+  slugOrder: topic.slugOrder,
+}))

codebenders-dashboard/lib/metric-glossary.ts

@@ -0,0 +1,49 @@
+import fs from "fs"
+import path from "path"
+
+import { GLOSSARY_TOPIC_SECTIONS } from "@/lib/glossary-constants"
+
+export function readMetricGlossaryMarkdown(): string {
+  const file = path.join(process.cwd(), "content", "metric-glossary.md")
+  return fs.readFileSync(file, "utf8")
+}
+
+/** Map slug → markdown body (text below `## slug`). */
+export function parseGlossaryEntries(md: string): Record<string, string> {
+  const out: Record<string, string> = {}
+  const lines = md.split(/\n/)
+  let current: string | null = null
+  const buf: string[] = []
+
+  const flush = (): void => {
+    if (current) out[current] = buf.join("\n").trim()
+    buf.length = 0
+  }
+
+  for (const line of lines) {
+    const m = /^## ([a-z0-9-]+)\s*$/.exec(line)
+    if (m) {
+      flush()
+      current = m[1]
+    } else if (current) {
+      buf.push(line)
+    }
+  }
+  flush()
+  return out
+}
+
+export function formatGlossarySlugForDisplay(slug: string): string {
+  return slug.replace(/-/g, " ")
+}
+
+export function buildGlossaryTopicBlocks(
+  entries: Record<string, string>
+): { id: string; label: string; slugs: string[] }[] {
+  const present = new Set(Object.keys(entries))
+  return GLOSSARY_TOPIC_SECTIONS.map((topic) => ({
+    id: topic.id,
+    label: topic.label,
+    slugs: topic.slugOrder.filter((slug) => present.has(slug)),
+  }))
+}