diff --git a/App/CLAUDE.md b/App/CLAUDE.md
index 6037430..1794f35 100644
--- a/App/CLAUDE.md
+++ b/App/CLAUDE.md
@@ -118,6 +118,16 @@ Inventory (`ItemInventory`, keyed by `productId` + `siteId`) is **incremented at
 
 `/po/import` parses a Pelagia-format Excel PO and saves it **directly as `CLOSED`** (historical record, bypasses approval). It auto-detects the company (by header/code), auto-matches the vessel by code, **auto-creates the vendor and any unknown products**, and upserts per-vendor prices.
 
+### Crewing (feature-flagged)
+
+A crew-management module built incrementally per the **wiki `Crewing-Implementation-Spec`** (the authoritative spec), behind `NEXT_PUBLIC_CREWING_ENABLED` (off unless `"true"`). It is delivered in phases (spec §12); only the **Foundations** layer ships so far:
+
+- **Role:** `SITE_STAFF` (the new `Role` enum member) — PM / Assistant PM / Site In-charge log in as site staff and act on behalf of crew. MPO is `MANNING`.
+- **Permissions:** `lib/permissions.ts` holds the full crewing grant matrix (spec §6) as the source of truth — `PO_ROLE_PERMISSIONS` + `CREWING_ROLE_PERMISSIONS` are merged into `ROLE_PERMISSIONS`. Notable rules: MPO has **no** attendance/leave; `decide_leave`/`approve_*`/`select_candidate` are Manager-only; `manage_ranks` is Manager + Admin.
+- **Reference data:** `Rank` is a self-referential org-chart hierarchy (like `Account`), seeded from `prisma/rank-data.ts`; `RankDocRequirement` (seeded from `prisma/rank-doc-data.ts`) lists the documents each rank must hold. Both seed via the shared `prisma/seed-ranks.ts` in dev **and** prod seeds. `Rank.grantsLogin` is true only for the three management ranks.
+- **Admin screen:** `/admin/ranks` ("Ranks & documents", gated by `manage_ranks` + the flag) — the rank hierarchy card + per-rank required-documents card.
+- The sidebar has a flag-gated **Crewing** section scaffold (`CREWING_ITEMS`, empty until later phases) and the Ranks link under Administration.
+
 ### GST Calculation
 
 `totalAmount = sum(quantity × unitPrice × (1 + gstRate))` for each line item. The `gstRate` is stored as a decimal on `POLineItem` (e.g., `0.18` = 18%). This applies in Server Actions when computing `totalPrice` per line and the PO `totalAmount`.
@@ -142,6 +152,7 @@ FORGEJO_URL, FORGEJO_REPO, FORGEJO_TOKEN
 
 GST_SERVICE_URL         # GstService microservice (defaults to localhost:3003)
 NEXT_PUBLIC_INVENTORY_ENABLED   # Inventory feature flag
+NEXT_PUBLIC_CREWING_ENABLED     # Crewing module feature flag (opt-in "true"; off by default)
 NEXT_PUBLIC_ENV_LABEL   # When set, shows a non-prod banner (EnvBanner). Leave unset in prod.
 ```
 
diff --git a/App/app/(portal)/admin/ranks/actions.ts b/App/app/(portal)/admin/ranks/actions.ts
new file mode 100644
index 0000000..2f2bbf0
--- /dev/null
+++ b/App/app/(portal)/admin/ranks/actions.ts
@@ -0,0 +1,187 @@
+"use server";
+
+import { auth } from "@/auth";
+import { db } from "@/lib/db";
+import { hasPermission } from "@/lib/permissions";
+import { CREWING_ENABLED } from "@/lib/feature-flags";
+import { RankCategory, SeafarerDocType } from "@prisma/client";
+import { z } from "zod";
+import { revalidatePath } from "next/cache";
+
+type ActionResult = { ok: true } | { error: string };
+
+async function guard(): Promise<{ error: string } | null> {
+  if (!CREWING_ENABLED) return { error: "Crewing is not enabled" };
+  const session = await auth();
+  if (!session?.user || !hasPermission(session.user.role, "manage_ranks")) {
+    return { error: "Unauthorized" };
+  }
+  return null;
+}
+
+const rankSchema = z.object({
+  code: z.string().trim().min(1, "Code is required").max(16, "Code is too long"),
+  name: z.string().trim().min(1, "Name is required"),
+  description: z.string().optional(),
+  parentId: z.string().optional(),
+  category: z.nativeEnum(RankCategory),
+  isSeafarer: z.boolean(),
+  grantsLogin: z.boolean(),
+});
+
+function parseRank(formData: FormData) {
+  return rankSchema.safeParse({
+    code: formData.get("code"),
+    name: formData.get("name"),
+    description: (formData.get("description") as string) || undefined,
+    parentId: (formData.get("parentId") as string) || undefined,
+    category: formData.get("category"),
+    isSeafarer: formData.get("isSeafarer") === "on" || formData.get("isSeafarer") === "true",
+    grantsLogin: formData.get("grantsLogin") === "on" || formData.get("grantsLogin") === "true",
+  });
+}
+
+// True if `candidateParentId` is `rankId` itself or one of its descendants —
+// setting it as the parent would create a cycle.
+async function wouldCycle(rankId: string, candidateParentId: string): Promise<boolean> {
+  if (rankId === candidateParentId) return true;
+  const all = await db.rank.findMany({ select: { id: true, parentId: true } });
+  const childrenOf = new Map<string, string[]>();
+  for (const r of all) {
+    if (r.parentId) {
+      const list = childrenOf.get(r.parentId) ?? [];
+      list.push(r.id);
+      childrenOf.set(r.parentId, list);
+    }
+  }
+  const stack = [rankId];
+  while (stack.length) {
+    const cur = stack.pop()!;
+    if (cur === candidateParentId) return true;
+    stack.push(...(childrenOf.get(cur) ?? []));
+  }
+  return false;
+}
+
+export async function createRank(formData: FormData): Promise<ActionResult> {
+  const denied = await guard();
+  if (denied) return denied;
+
+  const parsed = parseRank(formData);
+  if (!parsed.success) return { error: parsed.error.errors[0]?.message ?? "Validation failed" };
+  const data = parsed.data;
+
+  const exists = await db.rank.findUnique({ where: { code: data.code } });
+  if (exists) return { error: "A rank with that code already exists" };
+
+  await db.rank.create({
+    data: {
+      code: data.code,
+      name: data.name,
+      description: data.description ?? null,
+      parentId: data.parentId ?? null,
+      category: data.category,
+      isSeafarer: data.isSeafarer,
+      grantsLogin: data.grantsLogin,
+    },
+  });
+  revalidatePath("/admin/ranks");
+  return { ok: true };
+}
+
+export async function updateRank(formData: FormData): Promise<ActionResult> {
+  const denied = await guard();
+  if (denied) return denied;
+
+  const id = formData.get("id") as string;
+  if (!id) return { error: "Rank ID is required" };
+
+  const parsed = parseRank(formData);
+  if (!parsed.success) return { error: parsed.error.errors[0]?.message ?? "Validation failed" };
+  const data = parsed.data;
+
+  const conflict = await db.rank.findFirst({ where: { code: data.code, id: { not: id } } });
+  if (conflict) return { error: "Another rank already uses that code" };
+
+  if (data.parentId && (await wouldCycle(id, data.parentId))) {
+    return { error: "A rank cannot report to itself or one of its sub-ranks" };
+  }
+
+  await db.rank.update({
+    where: { id },
+    data: {
+      code: data.code,
+      name: data.name,
+      description: data.description ?? null,
+      parentId: data.parentId ?? null,
+      category: data.category,
+      isSeafarer: data.isSeafarer,
+      grantsLogin: data.grantsLogin,
+    },
+  });
+  revalidatePath("/admin/ranks");
+  return { ok: true };
+}
+
+export async function deleteRank(id: string): Promise<ActionResult> {
+  const denied = await guard();
+  if (denied) return denied;
+
+  const hasChildren = await db.rank.findFirst({ where: { parentId: id } });
+  if (hasChildren) return { error: "Cannot delete: this rank has sub-ranks. Reassign or remove them first." };
+
+  // Document requirements cascade on delete.
+  await db.rank.delete({ where: { id } });
+  revalidatePath("/admin/ranks");
+  return { ok: true };
+}
+
+export async function toggleRankActive(id: string): Promise<ActionResult> {
+  const denied = await guard();
+  if (denied) return denied;
+
+  const rank = await db.rank.findUnique({ where: { id }, select: { isActive: true } });
+  if (!rank) return { error: "Rank not found" };
+
+  await db.rank.update({ where: { id }, data: { isActive: !rank.isActive } });
+  revalidatePath("/admin/ranks");
+  return { ok: true };
+}
+
+const docReqSchema = z.object({
+  rankId: z.string().min(1),
+  docType: z.nativeEnum(SeafarerDocType),
+  isMandatory: z.boolean(),
+  note: z.string().optional(),
+});
+
+export async function addRankDocRequirement(formData: FormData): Promise<ActionResult> {
+  const denied = await guard();
+  if (denied) return denied;
+
+  const parsed = docReqSchema.safeParse({
+    rankId: formData.get("rankId"),
+    docType: formData.get("docType"),
+    isMandatory: formData.get("isMandatory") === "on" || formData.get("isMandatory") === "true",
+    note: (formData.get("note") as string) || undefined,
+  });
+  if (!parsed.success) return { error: parsed.error.errors[0]?.message ?? "Validation failed" };
+  const data = parsed.data;
+
+  await db.rankDocRequirement.upsert({
+    where: { rankId_docType: { rankId: data.rankId, docType: data.docType } },
+    update: { isMandatory: data.isMandatory, note: data.note ?? null },
+    create: { rankId: data.rankId, docType: data.docType, isMandatory: data.isMandatory, note: data.note ?? null },
+  });
+  revalidatePath("/admin/ranks");
+  return { ok: true };
+}
+
+export async function removeRankDocRequirement(id: string): Promise<ActionResult> {
+  const denied = await guard();
+  if (denied) return denied;
+
+  await db.rankDocRequirement.delete({ where: { id } });
+  revalidatePath("/admin/ranks");
+  return { ok: true };
+}
diff --git a/App/app/(portal)/admin/ranks/page.tsx b/App/app/(portal)/admin/ranks/page.tsx
new file mode 100644
index 0000000..9d1db72
--- /dev/null
+++ b/App/app/(portal)/admin/ranks/page.tsx
@@ -0,0 +1,44 @@
+import { auth } from "@/auth";
+import { db } from "@/lib/db";
+import { hasPermission } from "@/lib/permissions";
+import { CREWING_ENABLED } from "@/lib/feature-flags";
+import { redirect, notFound } from "next/navigation";
+import { RanksManager } from "./ranks-manager";
+import type { Metadata } from "next";
+
+export const metadata: Metadata = { title: "Ranks & Documents" };
+
+export default async function AdminRanksPage() {
+  // Dark unless the crewing module is switched on.
+  if (!CREWING_ENABLED) notFound();
+
+  const session = await auth();
+  if (!session?.user) redirect("/login");
+  if (!hasPermission(session.user.role, "manage_ranks")) redirect("/dashboard");
+
+  const ranks = await db.rank.findMany({
+    orderBy: [{ name: "asc" }],
+    include: { docRequirements: { orderBy: { docType: "asc" } } },
+  });
+
+  // Flatten to plain props (no Date/Decimal crosses the server→client boundary).
+  const rows = ranks.map((r) => ({
+    id: r.id,
+    code: r.code,
+    name: r.name,
+    description: r.description,
+    category: r.category,
+    isSeafarer: r.isSeafarer,
+    grantsLogin: r.grantsLogin,
+    isActive: r.isActive,
+    parentId: r.parentId,
+    docRequirements: r.docRequirements.map((d) => ({
+      id: d.id,
+      docType: d.docType,
+      isMandatory: d.isMandatory,
+      note: d.note,
+    })),
+  }));
+
+  return <RanksManager ranks={rows} />;
+}
diff --git a/App/app/(portal)/admin/ranks/rank-doc-panel.tsx b/App/app/(portal)/admin/ranks/rank-doc-panel.tsx
new file mode 100644
index 0000000..593fa34
--- /dev/null
+++ b/App/app/(portal)/admin/ranks/rank-doc-panel.tsx
@@ -0,0 +1,132 @@
+"use client";
+
+import { useState } from "react";
+import { useRouter } from "next/navigation";
+import type { SeafarerDocType } from "@prisma/client";
+import type { RankRow } from "./ranks-manager";
+import { addRankDocRequirement, removeRankDocRequirement } from "./actions";
+
+// Listed (not imported as a runtime enum) to keep @prisma/client out of the client bundle.
+const DOC_TYPES: { value: SeafarerDocType; label: string }[] = [
+  { value: "STCW", label: "STCW" },
+  { value: "AADHAAR", label: "Aadhaar" },
+  { value: "PAN", label: "PAN" },
+  { value: "PASSPORT", label: "Passport" },
+  { value: "CDC", label: "CDC" },
+  { value: "COC", label: "COC" },
+  { value: "PHOTOGRAPH", label: "Photograph" },
+  { value: "DRIVING_LICENSE", label: "Driving licence" },
+  { value: "MEDICAL_FITNESS", label: "Medical fitness" },
+  { value: "CONTRACT_LETTER", label: "Contract letter" },
+];
+
+const DOC_LABEL = Object.fromEntries(DOC_TYPES.map((d) => [d.value, d.label])) as Record<SeafarerDocType, string>;
+
+const INPUT =
+  "w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20";
+
+export function RankDocPanel({ rank }: { rank: RankRow | null }) {
+  const router = useRouter();
+  const [adding, setAdding] = useState(false);
+  const [pending, setPending] = useState(false);
+  const [error, setError] = useState("");
+
+  if (!rank) {
+    return (
+      <div className="rounded-lg border border-neutral-200 bg-white p-8 text-center text-sm text-neutral-400">
+        Select a rank to manage its required documents.
+      </div>
+    );
+  }
+
+  async function handleAdd(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    setPending(true);
+    setError("");
+    const fd = new FormData(e.currentTarget);
+    fd.set("rankId", rank!.id);
+    const result = await addRankDocRequirement(fd);
+    if ("error" in result) {
+      setError(result.error);
+      setPending(false);
+    } else {
+      setPending(false);
+      setAdding(false);
+      router.refresh();
+    }
+  }
+
+  async function handleRemove(id: string) {
+    await removeRankDocRequirement(id);
+    router.refresh();
+  }
+
+  return (
+    <div className="rounded-lg border border-neutral-200 bg-white overflow-hidden">
+      <div className="px-4 py-3 border-b border-neutral-200 bg-neutral-50 flex items-center justify-between">
+        <div>
+          <h2 className="text-sm font-semibold text-neutral-900">Required documents</h2>
+          <p className="text-xs text-neutral-500 mt-0.5">{rank.code} — {rank.name}</p>
+        </div>
+        <button
+          onClick={() => setAdding((v) => !v)}
+          className="rounded-lg border border-primary-200 bg-primary-50 px-2.5 py-1 text-xs font-medium text-primary-700 hover:bg-primary-100"
+        >
+          {adding ? "Close" : "+ Add"}
+        </button>
+      </div>
+
+      {adding && (
+        <form onSubmit={handleAdd} className="px-4 py-3 border-b border-neutral-100 bg-neutral-50/50 space-y-2">
+          <select name="docType" className={INPUT} defaultValue={DOC_TYPES[0].value}>
+            {DOC_TYPES.map((d) => (
+              <option key={d.value} value={d.value}>{d.label}</option>
+            ))}
+          </select>
+          <label className="flex items-center gap-2 text-sm text-neutral-700">
+            <input type="checkbox" name="isMandatory" defaultChecked className="h-4 w-4" />
+            Mandatory (uncheck for conditional)
+          </label>
+          <input name="note" className={INPUT} placeholder="Note (optional)" />
+          {error && <p className="text-sm text-danger-700 bg-danger-50 rounded-lg px-3 py-2">{error}</p>}
+          <button
+            type="submit"
+            disabled={pending}
+            className="rounded-lg bg-primary-600 px-3 py-1.5 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60"
+          >
+            {pending ? "Saving…" : "Add requirement"}
+          </button>
+        </form>
+      )}
+
+      {rank.docRequirements.length === 0 ? (
+        <p className="px-4 py-8 text-center text-sm text-neutral-400">No required documents for this rank.</p>
+      ) : (
+        <div>
+          {rank.docRequirements.map((d) => (
+            <div key={d.id} className="flex items-center gap-2 px-4 py-2.5 border-b border-neutral-100 last:border-0">
+              <span className="text-sm text-neutral-900 flex-1">{DOC_LABEL[d.docType] ?? d.docType}</span>
+              {d.note && <span className="text-xs text-neutral-400 max-w-[10rem] truncate">{d.note}</span>}
+              <span
+                className={
+                  d.isMandatory
+                    ? "rounded-full bg-warning-100 text-warning-700 px-2 py-0.5 text-xs font-medium"
+                    : "rounded-full bg-neutral-100 text-neutral-500 px-2 py-0.5 text-xs font-medium"
+                }
+              >
+                {d.isMandatory ? "Mandatory" : "Conditional"}
+              </span>
+              <button
+                onClick={() => handleRemove(d.id)}
+                className="text-xs text-danger-700 hover:underline"
+                title="Remove"
+              >
+                Remove
+              </button>
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}
diff --git a/App/app/(portal)/admin/ranks/rank-form.tsx b/App/app/(portal)/admin/ranks/rank-form.tsx
new file mode 100644
index 0000000..6af403f
--- /dev/null
+++ b/App/app/(portal)/admin/ranks/rank-form.tsx
@@ -0,0 +1,184 @@
+"use client";
+
+import { useState } from "react";
+import { useRouter } from "next/navigation";
+import { AdminDialog } from "@/components/ui/admin-dialog";
+import { createRank, updateRank } from "./actions";
+import type { RankRow } from "./ranks-manager";
+
+const INPUT =
+  "w-full rounded-lg border border-neutral-300 px-3 py-2 text-sm focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-primary-500/20";
+
+function RankFormFields({ rank, allRanks }: { rank?: RankRow; allRanks: RankRow[] }) {
+  const parentOptions = allRanks.filter((r) => !rank || r.id !== rank.id);
+
+  return (
+    <div className="space-y-3">
+      <div className="grid grid-cols-2 gap-3">
+        <div>
+          <label className="block text-xs font-medium text-neutral-700 mb-1">Code *</label>
+          <input name="code" defaultValue={rank?.code} required maxLength={16} placeholder="e.g. SDO" className={INPUT} />
+        </div>
+        <div>
+          <label className="block text-xs font-medium text-neutral-700 mb-1">Name *</label>
+          <input name="name" defaultValue={rank?.name} required placeholder="e.g. Sr. Dredge Operator" className={INPUT} />
+        </div>
+      </div>
+
+      <div className="grid grid-cols-2 gap-3">
+        <div>
+          <label className="block text-xs font-medium text-neutral-700 mb-1">Reports to</label>
+          <select name="parentId" defaultValue={rank?.parentId ?? ""} className={INPUT}>
+            <option value="">— Top of the org —</option>
+            {parentOptions.map((r) => (
+              <option key={r.id} value={r.id}>
+                {r.code} — {r.name}
+              </option>
+            ))}
+          </select>
+        </div>
+        <div>
+          <label className="block text-xs font-medium text-neutral-700 mb-1">Category</label>
+          <select name="category" defaultValue={rank?.category ?? "OPERATIONAL"} className={INPUT}>
+            <option value="OPERATIONAL">Operational</option>
+            <option value="SUPPORT">Support</option>
+          </select>
+        </div>
+      </div>
+
+      <div className="flex items-center gap-6 pt-1">
+        <label className="flex items-center gap-2 text-sm text-neutral-700">
+          <input type="checkbox" name="isSeafarer" defaultChecked={rank?.isSeafarer ?? false} className="h-4 w-4" />
+          Seafarer (holds STCW / CDC etc.)
+        </label>
+        <label className="flex items-center gap-2 text-sm text-neutral-700">
+          <input type="checkbox" name="grantsLogin" defaultChecked={rank?.grantsLogin ?? false} className="h-4 w-4" />
+          Grants portal login
+        </label>
+      </div>
+
+      <div>
+        <label className="block text-xs font-medium text-neutral-700 mb-1">Description</label>
+        <input name="description" defaultValue={rank?.description ?? ""} className={INPUT} placeholder="Optional" />
+      </div>
+    </div>
+  );
+}
+
+export function AddRankButton({ allRanks }: { allRanks: RankRow[] }) {
+  const router = useRouter();
+  const [open, setOpen] = useState(false);
+  const [pending, setPending] = useState(false);
+  const [error, setError] = useState("");
+
+  async function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    setPending(true);
+    setError("");
+    const result = await createRank(new FormData(e.currentTarget));
+    if ("error" in result) {
+      setError(result.error);
+      setPending(false);
+    } else {
+      setPending(false);
+      setOpen(false);
+      router.refresh();
+    }
+  }
+
+  return (
+    <>
+      <button
+        onClick={() => setOpen(true)}
+        className="rounded-lg bg-primary-600 px-4 py-2.5 text-sm font-semibold text-white hover:bg-primary-700 transition-colors"
+      >
+        + Add Rank
+      </button>
+      <AdminDialog title="Add Rank" open={open} onClose={() => setOpen(false)}>
+        <form onSubmit={handleSubmit} className="space-y-4">
+          <RankFormFields allRanks={allRanks} />
+          {error && <p className="text-sm text-danger-700 bg-danger-50 rounded-lg px-3 py-2">{error}</p>}
+          <div className="flex justify-end gap-3 pt-1">
+            <button
+              type="button"
+              onClick={() => setOpen(false)}
+              className="rounded-lg border border-neutral-300 px-4 py-2 text-sm font-medium text-neutral-700 hover:bg-neutral-50"
+            >
+              Cancel
+            </button>
+            <button
+              type="submit"
+              disabled={pending}
+              className="rounded-lg bg-primary-600 px-4 py-2 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60"
+            >
+              {pending ? "Creating…" : "Create Rank"}
+            </button>
+          </div>
+        </form>
+      </AdminDialog>
+    </>
+  );
+}
+
+export function EditRankButton({
+  rank,
+  allRanks,
+  open: controlledOpen,
+  onOpenChange,
+}: {
+  rank: RankRow;
+  allRanks: RankRow[];
+  open?: boolean;
+  onOpenChange?: (v: boolean) => void;
+}) {
+  const router = useRouter();
+  const [internalOpen, setInternalOpen] = useState(false);
+  const [pending, setPending] = useState(false);
+  const [error, setError] = useState("");
+
+  const isControlled = controlledOpen !== undefined;
+  const open = isControlled ? controlledOpen : internalOpen;
+  const setOpen = isControlled ? (onOpenChange ?? (() => {})) : setInternalOpen;
+
+  async function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    setPending(true);
+    setError("");
+    const fd = new FormData(e.currentTarget);
+    fd.set("id", rank.id);
+    const result = await updateRank(fd);
+    if ("error" in result) {
+      setError(result.error);
+      setPending(false);
+    } else {
+      setPending(false);
+      setOpen(false);
+      router.refresh();
+    }
+  }
+
+  return (
+    <AdminDialog title="Edit Rank" open={open} onClose={() => setOpen(false)}>
+      <form onSubmit={handleSubmit} className="space-y-4">
+        <RankFormFields rank={rank} allRanks={allRanks} />
+        {error && <p className="text-sm text-danger-700 bg-danger-50 rounded-lg px-3 py-2">{error}</p>}
+        <div className="flex justify-end gap-3 pt-1">
+          <button
+            type="button"
+            onClick={() => setOpen(false)}
+            className="rounded-lg border border-neutral-300 px-4 py-2 text-sm font-medium text-neutral-700 hover:bg-neutral-50"
+          >
+            Cancel
+          </button>
+          <button
+            type="submit"
+            disabled={pending}
+            className="rounded-lg bg-primary-600 px-4 py-2 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60"
+          >
+            {pending ? "Saving…" : "Save Changes"}
+          </button>
+        </div>
+      </form>
+    </AdminDialog>
+  );
+}
diff --git a/App/app/(portal)/admin/ranks/ranks-manager.tsx b/App/app/(portal)/admin/ranks/ranks-manager.tsx
new file mode 100644
index 0000000..e4c537b
--- /dev/null
+++ b/App/app/(portal)/admin/ranks/ranks-manager.tsx
@@ -0,0 +1,200 @@
+"use client";
+
+import { useState } from "react";
+import type { RankCategory, SeafarerDocType } from "@prisma/client";
+import { AddRankButton, EditRankButton } from "./rank-form";
+import { RankDocPanel } from "./rank-doc-panel";
+import { RowActionsMenu, RowActionsItem, RowActionsDestructiveItem, RowActionsSeparator } from "@/components/ui/row-actions-menu";
+import { DeleteConfirmDialog } from "@/components/ui/delete-confirm-dialog";
+import { ConfirmDialog } from "@/components/ui/confirm-dialog";
+import { deleteRank, toggleRankActive } from "./actions";
+import { cn } from "@/lib/utils";
+
+export type DocReqRow = {
+  id: string;
+  docType: SeafarerDocType;
+  isMandatory: boolean;
+  note: string | null;
+};
+
+export type RankRow = {
+  id: string;
+  code: string;
+  name: string;
+  description: string | null;
+  category: RankCategory;
+  isSeafarer: boolean;
+  grantsLogin: boolean;
+  isActive: boolean;
+  parentId: string | null;
+  docRequirements: DocReqRow[];
+};
+
+type TreeNode = RankRow & { children: TreeNode[] };
+
+function buildTree(ranks: RankRow[]): TreeNode[] {
+  const byId = new Map<string, TreeNode>();
+  ranks.forEach((r) => byId.set(r.id, { ...r, children: [] }));
+  const roots: TreeNode[] = [];
+  byId.forEach((node) => {
+    if (node.parentId && byId.has(node.parentId)) {
+      byId.get(node.parentId)!.children.push(node);
+    } else {
+      roots.push(node);
+    }
+  });
+  const sortRec = (nodes: TreeNode[]) => {
+    nodes.sort((a, b) => a.name.localeCompare(b.name));
+    nodes.forEach((n) => sortRec(n.children));
+  };
+  sortRec(roots);
+  return roots;
+}
+
+function RankActionsMenu({ rank, allRanks }: { rank: RankRow; allRanks: RankRow[] }) {
+  const [editOpen, setEditOpen] = useState(false);
+  const [deleteOpen, setDeleteOpen] = useState(false);
+  const [toggleOpen, setToggleOpen] = useState(false);
+
+  return (
+    <>
+      <RowActionsMenu>
+        <RowActionsItem onClick={() => setEditOpen(true)}>Edit</RowActionsItem>
+        <RowActionsItem onClick={() => setToggleOpen(true)}>
+          {rank.isActive ? "Deactivate" : "Activate"}
+        </RowActionsItem>
+        <RowActionsSeparator />
+        <RowActionsDestructiveItem onClick={() => setDeleteOpen(true)}>Delete</RowActionsDestructiveItem>
+      </RowActionsMenu>
+      <EditRankButton rank={rank} allRanks={allRanks} open={editOpen} onOpenChange={setEditOpen} />
+      <DeleteConfirmDialog
+        open={deleteOpen}
+        onOpenChange={setDeleteOpen}
+        label={`${rank.code} — ${rank.name}`}
+        onConfirm={() => deleteRank(rank.id)}
+      />
+      <ConfirmDialog
+        open={toggleOpen}
+        onOpenChange={setToggleOpen}
+        title={rank.isActive ? `Deactivate ${rank.name}?` : `Activate ${rank.name}?`}
+        description={
+          rank.isActive
+            ? `${rank.name} will be hidden from new requisitions and crew records.`
+            : `${rank.name} will become available again.`
+        }
+        confirmLabel={rank.isActive ? "Deactivate" : "Activate"}
+        onConfirm={() => toggleRankActive(rank.id)}
+      />
+    </>
+  );
+}
+
+function RankRowView({
+  node,
+  depth,
+  allRanks,
+  selectedId,
+  onSelect,
+}: {
+  node: TreeNode;
+  depth: number;
+  allRanks: RankRow[];
+  selectedId: string | null;
+  onSelect: (id: string) => void;
+}) {
+  const isSelected = node.id === selectedId;
+  return (
+    <>
+      <div
+        className={cn(
+          "flex items-center gap-2 px-3 py-2 border-b border-neutral-100 last:border-0 cursor-pointer",
+          isSelected ? "bg-primary-50" : "hover:bg-neutral-50"
+        )}
+        style={{ paddingLeft: 12 + depth * 20 }}
+        onClick={() => onSelect(node.id)}
+      >
+        <span className="font-mono text-xs text-neutral-400 w-12 shrink-0">{node.code}</span>
+        <span className={cn("text-sm flex-1", node.isActive ? "text-neutral-900" : "text-neutral-400 line-through")}>
+          {node.name}
+        </span>
+        {node.grantsLogin && (
+          <span className="rounded-full bg-primary-100 text-primary-700 px-2 py-0.5 text-xs font-medium">Login</span>
+        )}
+        {node.isSeafarer && (
+          <span className="rounded-full bg-neutral-100 text-neutral-600 px-2 py-0.5 text-xs font-medium">Seafarer</span>
+        )}
+        <span className="rounded-full bg-neutral-100 text-neutral-500 px-2 py-0.5 text-xs">{node.category}</span>
+        <span className="text-xs text-neutral-400 w-16 text-right shrink-0">
+          {node.docRequirements.length} doc{node.docRequirements.length === 1 ? "" : "s"}
+        </span>
+        <div onClick={(e) => e.stopPropagation()}>
+          <RankActionsMenu rank={node} allRanks={allRanks} />
+        </div>
+      </div>
+      {node.children.map((child) => (
+        <RankRowView
+          key={child.id}
+          node={child}
+          depth={depth + 1}
+          allRanks={allRanks}
+          selectedId={selectedId}
+          onSelect={onSelect}
+        />
+      ))}
+    </>
+  );
+}
+
+export function RanksManager({ ranks }: { ranks: RankRow[] }) {
+  const tree = buildTree(ranks);
+  const [selectedId, setSelectedId] = useState<string | null>(ranks[0]?.id ?? null);
+  const selected = ranks.find((r) => r.id === selectedId) ?? null;
+
+  return (
+    <div>
+      <div className="mb-6 flex items-center justify-between">
+        <div>
+          <h1 className="text-2xl font-semibold text-neutral-900">Ranks &amp; Documents</h1>
+          <p className="text-sm text-neutral-500 mt-0.5">
+            {ranks.length} ranks · the crew org chart and the documents each rank must hold
+          </p>
+        </div>
+        <AddRankButton allRanks={ranks} />
+      </div>
+
+      <div className="grid grid-cols-1 lg:grid-cols-5 gap-6">
+        {/* Rank hierarchy card */}
+        <div className="lg:col-span-3 rounded-lg border border-neutral-200 bg-white overflow-hidden">
+          <div className="px-4 py-3 border-b border-neutral-200 bg-neutral-50">
+            <h2 className="text-sm font-semibold text-neutral-900">Rank hierarchy</h2>
+            <p className="text-xs text-neutral-500 mt-0.5">
+              The org chart. <span className="text-primary-700 font-medium">Login</span> ranks (PM, Assistant PM, Site
+              In-charge) map to a portal account; all others are crew records.
+            </p>
+          </div>
+          {tree.length === 0 ? (
+            <p className="px-4 py-12 text-center text-neutral-400">No ranks yet. Add a top-level rank to begin.</p>
+          ) : (
+            <div>
+              {tree.map((node) => (
+                <RankRowView
+                  key={node.id}
+                  node={node}
+                  depth={0}
+                  allRanks={ranks}
+                  selectedId={selectedId}
+                  onSelect={setSelectedId}
+                />
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* Required documents card */}
+        <div className="lg:col-span-2">
+          <RankDocPanel rank={selected} />
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/App/app/(portal)/admin/superuser-requests/page.tsx b/App/app/(portal)/admin/superuser-requests/page.tsx
index 23251ff..a1bca57 100644
--- a/App/app/(portal)/admin/superuser-requests/page.tsx
+++ b/App/app/(portal)/admin/superuser-requests/page.tsx
@@ -22,6 +22,7 @@ const ROLE_LABELS: Record<string, string> = {
   SUPERUSER: "SuperUser",
   AUDITOR: "Auditor",
   ADMIN: "Admin",
+  SITE_STAFF: "Site Staff",
 };
 
 export default async function SuperUserRequestsPage() {
diff --git a/App/app/(portal)/admin/users/users-table.tsx b/App/app/(portal)/admin/users/users-table.tsx
index 644a90a..2a1f1b1 100644
--- a/App/app/(portal)/admin/users/users-table.tsx
+++ b/App/app/(portal)/admin/users/users-table.tsx
@@ -30,6 +30,7 @@ const ROLE_LABELS: Record<string, string> = {
   SUPERUSER: "SuperUser",
   AUDITOR: "Auditor",
   ADMIN: "Admin",
+  SITE_STAFF: "Site Staff",
 };
 
 const CHIPS = ["Manning", "Technical", "Accounts", "Manager", "Superuser", "Auditor", "Admin", "Active", "Inactive"];
diff --git a/App/app/(portal)/profile/page.tsx b/App/app/(portal)/profile/page.tsx
index 81f1bea..b8f765f 100644
--- a/App/app/(portal)/profile/page.tsx
+++ b/App/app/(portal)/profile/page.tsx
@@ -18,6 +18,7 @@ const ROLE_LABELS: Record<string, string> = {
   SUPERUSER: "SuperUser",
   AUDITOR: "Auditor",
   ADMIN: "Admin",
+  SITE_STAFF: "Site Staff",
 };
 
 export default async function ProfilePage() {
diff --git a/App/components/layout/header.tsx b/App/components/layout/header.tsx
index c70d7f8..613b823 100644
--- a/App/components/layout/header.tsx
+++ b/App/components/layout/header.tsx
@@ -15,6 +15,7 @@ const ROLE_LABELS: Record<Role, string> = {
   SUPERUSER: "SuperUser",
   AUDITOR: "Auditor",
   ADMIN: "Admin",
+  SITE_STAFF: "Site Staff",
 };
 
 const CART_ROLES: Role[] = ["TECHNICAL", "MANNING", "SUPERUSER", "MANAGER"];
diff --git a/App/components/layout/sidebar.tsx b/App/components/layout/sidebar.tsx
index fcd17bc..7a1287a 100644
--- a/App/components/layout/sidebar.tsx
+++ b/App/components/layout/sidebar.tsx
@@ -2,7 +2,7 @@
 
 import { usePathname } from "next/navigation";
 import Link from "next/link";
-import { INVENTORY_ENABLED } from "@/lib/feature-flags";
+import { INVENTORY_ENABLED, CREWING_ENABLED } from "@/lib/feature-flags";
 import { cn } from "@/lib/utils";
 import {
   LayoutDashboard,
@@ -24,6 +24,7 @@ import {
   ShoppingCart,
   UserCircle,
   ShieldCheck,
+  Network,
 } from "lucide-react";
 import type { Role } from "@prisma/client";
 
@@ -67,11 +68,22 @@ const PURCHASING_MGMT: NavItem[] = [
 
 const PURCHASING_ITEMS: NavItem[] = [...PURCHASING_STAFF, ...PURCHASING_MGMT];
 
+// ── Crewing section (feature-flagged) ─────────────────────────────────────────
+// Scaffold for the Crewing module. Phase 1 (Foundations) adds no top-level items
+// here — its only screen, "Ranks & documents", lives under Administration. Later
+// phases append Requisitions / Candidates / Crew / Leave / Attendance /
+// Verification with their per-role visibility (see Crewing-Implementation-Spec §7).
+const CREWING_ITEMS: NavItem[] = [];
+
 // ── Administration section ────────────────────────────────────────────────────
 // Vendors shown to MANAGER / ACCOUNTS under their own Administration header
 const MANAGER_ADMIN_ITEMS: NavItem[] = [
   { href: "/admin/vendors",   label: "Vendors", icon: Store,   roles: ["MANAGER", "ACCOUNTS", "ADMIN"] },
   { href: "/admin/products",  label: "Items",   icon: Package, roles: ["MANAGER", "ADMIN"] },
+  // Crewing reference data — gated by the crewing flag; held by manage_ranks (MGR/ADMIN).
+  ...(CREWING_ENABLED
+    ? [{ href: "/admin/ranks", label: "Ranks & documents", icon: Network, roles: ["MANAGER", "ADMIN"] as Role[] }]
+    : []),
 ];
 
 // Full Administration section (ADMIN only)
@@ -90,6 +102,7 @@ export function Sidebar({ userRole }: { userRole: Role }) {
 
   const visibleMain       = NAV_ITEMS.filter((i) => !i.roles || i.roles.includes(userRole));
   const visiblePurchasing = PURCHASING_ITEMS.filter((i) => !i.roles || i.roles.includes(userRole));
+  const visibleCrewing    = CREWING_ITEMS.filter((i) => !i.roles || i.roles.includes(userRole));
   const visibleMgrAdmin   = MANAGER_ADMIN_ITEMS.filter((i) => !i.roles || i.roles.includes(userRole));
 
   return (
@@ -115,6 +128,16 @@ export function Sidebar({ userRole }: { userRole: Role }) {
           </>
         )}
 
+        {/* Crewing — only renders once the flag is on and items exist (later phases) */}
+        {visibleCrewing.length > 0 && (
+          <>
+            <SectionHeader label="Crewing" />
+            {visibleCrewing.map((item) => (
+              <NavLink key={item.href} item={item} pathname={pathname} />
+            ))}
+          </>
+        )}
+
         {/* Vendors under Administration for MANAGER / ACCOUNTS */}
         {!isAdmin && visibleMgrAdmin.length > 0 && (
           <>
diff --git a/App/lib/feature-flags.ts b/App/lib/feature-flags.ts
index 3b662a2..3923a3c 100644
--- a/App/lib/feature-flags.ts
+++ b/App/lib/feature-flags.ts
@@ -4,7 +4,15 @@
  *
  * NEXT_PUBLIC_INVENTORY_ENABLED=false  →  hides inventory tracking (site qty/consumption)
  *   Vendor list, product catalogue, and cart remain available for PO creation regardless.
+ *
+ * NEXT_PUBLIC_CREWING_ENABLED=true  →  exposes the Crewing module (crew/ranks/requisitions
+ *   etc.). Opt-in (off unless explicitly "true") because the feature is built incrementally;
+ *   keeping it dark by default leaves production unchanged. See lib/permissions.ts (§6 matrix)
+ *   and wiki Crewing-Implementation-Spec.
  */
 
 export const INVENTORY_ENABLED =
   process.env.NEXT_PUBLIC_INVENTORY_ENABLED !== "false";
+
+export const CREWING_ENABLED =
+  process.env.NEXT_PUBLIC_CREWING_ENABLED === "true";
diff --git a/App/lib/id-generators.ts b/App/lib/id-generators.ts
index 58df64a..7aeccd9 100644
--- a/App/lib/id-generators.ts
+++ b/App/lib/id-generators.ts
@@ -6,6 +6,7 @@ export const ROLE_PREFIX: Record<string, string> = {
   SUPERUSER: "SUP",
   AUDITOR: "AUD",
   ADMIN: "ADM",
+  SITE_STAFF: "SIT",
 };
 
 /** Find max existing number for prefix and return prefix-(max+1), zero-padded to 3 digits */
diff --git a/App/lib/permissions.ts b/App/lib/permissions.ts
index 24c549c..bf297bb 100644
--- a/App/lib/permissions.ts
+++ b/App/lib/permissions.ts
@@ -20,9 +20,42 @@ export type Permission =
   | "create_vendor"
   | "manage_vessels_accounts"
   | "manage_products"
-  | "manage_sites";
+  | "manage_sites"
+  // ── Crewing (feature-flagged) — mirrors Crewing-Implementation-Spec §6 ──────
+  | "raise_requisition"
+  | "request_relief_cover"
+  | "convert_relief_to_requisition"
+  | "cancel_requisition"
+  | "view_requisitions"
+  | "manage_candidates"
+  | "record_reference_check"
+  | "record_interview_result"
+  | "request_interview_waiver"
+  | "approve_interview_waiver"
+  | "approve_salary_structure"
+  | "select_candidate"
+  | "onboard_crew"
+  | "sign_off_crew"
+  | "view_crew_records"
+  | "upload_crew_records"
+  | "issue_ppe"
+  | "apply_leave"
+  | "decide_leave"
+  | "record_attendance"
+  | "view_attendance"
+  | "verify_site_records"
+  | "verify_bank_epf"
+  | "raise_appraisal"
+  | "verify_appraisal"
+  | "approve_appraisal"
+  | "generate_wage_report"
+  | "approve_wage_report"
+  | "view_wage_report"
+  | "manage_ranks";
 
-const ROLE_PERMISSIONS: Record<Role, Permission[]> = {
+// Purchasing / admin permissions (the original PPMS matrix). SITE_STAFF is a
+// crewing-only role and holds no purchasing permissions.
+const PO_ROLE_PERMISSIONS: Record<Role, Permission[]> = {
   TECHNICAL: ["create_po", "submit_po", "edit_own_draft_po", "view_own_pos", "confirm_receipt", "create_vendor"],
   MANNING: ["create_po", "submit_po", "edit_own_draft_po", "view_own_pos", "confirm_receipt", "create_vendor"],
   ACCOUNTS: ["view_all_pos", "process_payment", "manage_vendors", "create_vendor"],
@@ -77,8 +110,115 @@ const ROLE_PERMISSIONS: Record<Role, Permission[]> = {
     "manage_products",
     "manage_sites",
   ],
+  SITE_STAFF: [],
 };
 
+// Crewing permissions — a verbatim transcription of the §6 grant matrix in
+// wiki Crewing-Implementation-Spec. Gating these is harmless until the screens
+// land (the module is behind NEXT_PUBLIC_CREWING_ENABLED). Notes from the spec:
+// MPO (MANNING) has NO attendance/leave; decide_leave/approve_* and selection are
+// Manager-only; manage_ranks is Manager + Admin (not SuperUser).
+const CREWING_ROLE_PERMISSIONS: Record<Role, Permission[]> = {
+  TECHNICAL: [],
+  SITE_STAFF: [
+    "request_relief_cover",
+    "sign_off_crew",
+    "view_crew_records",
+    "upload_crew_records",
+    "issue_ppe",
+    "apply_leave",
+    "record_attendance",
+    "view_attendance",
+    "raise_appraisal",
+  ],
+  MANNING: [
+    "raise_requisition",
+    "convert_relief_to_requisition",
+    "cancel_requisition",
+    "view_requisitions",
+    "manage_candidates",
+    "record_reference_check",
+    "record_interview_result",
+    "request_interview_waiver",
+    "onboard_crew",
+    "sign_off_crew",
+    "view_crew_records",
+    "upload_crew_records",
+    "issue_ppe",
+    "verify_site_records",
+    "verify_appraisal",
+  ],
+  ACCOUNTS: ["view_crew_records", "verify_bank_epf", "view_wage_report"],
+  MANAGER: [
+    "raise_requisition",
+    "convert_relief_to_requisition",
+    "cancel_requisition",
+    "view_requisitions",
+    "manage_candidates",
+    "record_reference_check",
+    "record_interview_result",
+    "approve_interview_waiver",
+    "approve_salary_structure",
+    "select_candidate",
+    "onboard_crew",
+    "sign_off_crew",
+    "view_crew_records",
+    "upload_crew_records",
+    "issue_ppe",
+    "apply_leave",
+    "decide_leave",
+    "view_attendance",
+    "verify_site_records",
+    "raise_appraisal",
+    "verify_appraisal",
+    "approve_appraisal",
+    "generate_wage_report",
+    "approve_wage_report",
+    "view_wage_report",
+    "manage_ranks",
+  ],
+  SUPERUSER: [
+    "raise_requisition",
+    "request_relief_cover",
+    "convert_relief_to_requisition",
+    "cancel_requisition",
+    "view_requisitions",
+    "manage_candidates",
+    "record_reference_check",
+    "record_interview_result",
+    "request_interview_waiver",
+    "approve_interview_waiver",
+    "approve_salary_structure",
+    "select_candidate",
+    "onboard_crew",
+    "sign_off_crew",
+    "view_crew_records",
+    "upload_crew_records",
+    "issue_ppe",
+    "apply_leave",
+    "decide_leave",
+    "record_attendance",
+    "view_attendance",
+    "verify_site_records",
+    "verify_bank_epf",
+    "raise_appraisal",
+    "verify_appraisal",
+    "approve_appraisal",
+    "generate_wage_report",
+    "approve_wage_report",
+    "view_wage_report",
+  ],
+  AUDITOR: ["view_requisitions", "view_crew_records", "view_attendance", "view_wage_report"],
+  ADMIN: ["view_requisitions", "view_crew_records", "view_wage_report", "manage_ranks"],
+};
+
+const ROLE_PERMISSIONS: Record<Role, Permission[]> = Object.fromEntries(
+  (Object.keys(PO_ROLE_PERMISSIONS) as Role[]).map((role) => [
+    role,
+    [...PO_ROLE_PERMISSIONS[role], ...CREWING_ROLE_PERMISSIONS[role]],
+  ])
+) as Record<Role, Permission[]>;
+
 export function hasPermission(role: Role, permission: Permission): boolean {
   return ROLE_PERMISSIONS[role]?.includes(permission) ?? false;
 }
diff --git a/App/prisma/migrations/20260622071237_crewing_foundations/migration.sql b/App/prisma/migrations/20260622071237_crewing_foundations/migration.sql
new file mode 100644
index 0000000..374e294
--- /dev/null
+++ b/App/prisma/migrations/20260622071237_crewing_foundations/migration.sql
@@ -0,0 +1,49 @@
+-- CreateEnum
+CREATE TYPE "RankCategory" AS ENUM ('OPERATIONAL', 'SUPPORT');
+
+-- CreateEnum
+CREATE TYPE "SeafarerDocType" AS ENUM ('STCW', 'AADHAAR', 'PAN', 'PASSPORT', 'CDC', 'COC', 'PHOTOGRAPH', 'DRIVING_LICENSE', 'MEDICAL_FITNESS', 'CONTRACT_LETTER');
+
+-- AlterEnum
+ALTER TYPE "Role" ADD VALUE 'SITE_STAFF';
+
+-- CreateTable
+CREATE TABLE "Rank" (
+    "id" TEXT NOT NULL,
+    "code" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "description" TEXT,
+    "category" "RankCategory" NOT NULL DEFAULT 'OPERATIONAL',
+    "isSeafarer" BOOLEAN NOT NULL DEFAULT false,
+    "grantsLogin" BOOLEAN NOT NULL DEFAULT false,
+    "isActive" BOOLEAN NOT NULL DEFAULT true,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+    "parentId" TEXT,
+
+    CONSTRAINT "Rank_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "RankDocRequirement" (
+    "id" TEXT NOT NULL,
+    "rankId" TEXT NOT NULL,
+    "docType" "SeafarerDocType" NOT NULL,
+    "isMandatory" BOOLEAN NOT NULL DEFAULT true,
+    "note" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "RankDocRequirement_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Rank_code_key" ON "Rank"("code");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "RankDocRequirement_rankId_docType_key" ON "RankDocRequirement"("rankId", "docType");
+
+-- AddForeignKey
+ALTER TABLE "Rank" ADD CONSTRAINT "Rank_parentId_fkey" FOREIGN KEY ("parentId") REFERENCES "Rank"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "RankDocRequirement" ADD CONSTRAINT "RankDocRequirement_rankId_fkey" FOREIGN KEY ("rankId") REFERENCES "Rank"("id") ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/App/prisma/rank-data.ts b/App/prisma/rank-data.ts
new file mode 100644
index 0000000..25a313a
--- /dev/null
+++ b/App/prisma/rank-data.ts
@@ -0,0 +1,48 @@
+// Crew rank hierarchy (org chart) — captured from Crewing.excalidraw and the
+// tree in wiki Crewing-Data-Model §2. A self-referential tree like the Account
+// accounting-code hierarchy: `parentCode = null` is the top of the org.
+//
+//   grantsLogin = true  → only PM, Assistant PM, Site In-charge (the three ranks
+//                         that map to a SITE_STAFF portal login). Everyone else is
+//                         a crew member / data subject with no account.
+//   isSeafarer  = true  → the dredging/engine/deck crew who hold seafarer documents
+//                         (STCW/CDC/COC/medical). Management & shore-support do not.
+//   category            → OPERATIONAL vs SUPPORT (the classDef "sup" nodes).
+
+import type { RankCategory } from "@prisma/client";
+
+export type RankEntry = {
+  code: string;
+  name: string;
+  parentCode: string | null;
+  category: RankCategory;
+  isSeafarer: boolean;
+  grantsLogin: boolean;
+};
+
+export const RANKS: RankEntry[] = [
+  // ── Management (portal logins) ──────────────────────────────────────────────
+  { code: "PM",   name: "PM",                parentCode: null,  category: "OPERATIONAL", isSeafarer: false, grantsLogin: true  },
+  { code: "APM",  name: "Assistant PM",      parentCode: "PM",  category: "OPERATIONAL", isSeafarer: false, grantsLogin: true  },
+  { code: "SIC",  name: "Site In-charge",    parentCode: "APM", category: "OPERATIONAL", isSeafarer: false, grantsLogin: true  },
+
+  // ── Shore support (no login, no seafarer docs) ──────────────────────────────
+  { code: "ACC",  name: "Accountant",        parentCode: "APM",  category: "SUPPORT", isSeafarer: false, grantsLogin: false },
+  { code: "DRV",  name: "Driver",            parentCode: "APM",  category: "SUPPORT", isSeafarer: false, grantsLogin: false },
+  { code: "COOK", name: "Cook",              parentCode: "APM",  category: "SUPPORT", isSeafarer: false, grantsLogin: false },
+  { code: "CKH",  name: "Cook Helper",       parentCode: "COOK", category: "SUPPORT", isSeafarer: false, grantsLogin: false },
+
+  // ── Operational crew (seafarers) ────────────────────────────────────────────
+  { code: "DIC",  name: "Dredger In-charge",     parentCode: "SIC", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "SDO",  name: "Sr. Dredge Operator",   parentCode: "DIC", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "PLS",  name: "Pipeline Supervisor",   parentCode: "SDO", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "PLA",  name: "Pipeline Assistant",    parentCode: "PLS", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "JDO",  name: "Jr. Dredge Operator",   parentCode: "SDO", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "ERO",  name: "Engine Room Operator",  parentCode: "JDO", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "DH",   name: "Deck Hand",             parentCode: "ERO", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "TR",   name: "Trainee",               parentCode: "DH",  category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "MB",   name: "Mess Boy",              parentCode: "DH",  category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "ELE",  name: "Electrician",           parentCode: "SDO", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "SFB",  name: "Sr. Fabricator",        parentCode: "SDO", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+  { code: "FW",   name: "Fabricator / Welder",   parentCode: "SFB", category: "OPERATIONAL", isSeafarer: true, grantsLogin: false },
+];
diff --git a/App/prisma/rank-doc-data.ts b/App/prisma/rank-doc-data.ts
new file mode 100644
index 0000000..ef4c89e
--- /dev/null
+++ b/App/prisma/rank-doc-data.ts
@@ -0,0 +1,42 @@
+// Default required-document set per rank, derived from the rank flags in
+// rank-data.ts. Drives candidate vetting and crew uploads (RankDocRequirement).
+//   - Every crew member: Aadhaar, PAN, photograph.
+//   - Seafarers additionally: STCW, CDC, passport, medical fitness (mandatory);
+//     COC is conditional (officer/senior ranks only).
+//   - Driver: driving licence (mandatory).
+// Editable afterwards at /admin/ranks; this is just the seeded baseline.
+
+import type { SeafarerDocType } from "@prisma/client";
+import { RANKS } from "./rank-data";
+
+export type RankDocReq = {
+  rankCode: string;
+  docType: SeafarerDocType;
+  isMandatory: boolean;
+  note?: string;
+};
+
+const COMMON: { docType: SeafarerDocType; isMandatory: boolean }[] = [
+  { docType: "AADHAAR", isMandatory: true },
+  { docType: "PAN", isMandatory: true },
+  { docType: "PHOTOGRAPH", isMandatory: true },
+];
+
+const SEAFARER: { docType: SeafarerDocType; isMandatory: boolean; note?: string }[] = [
+  { docType: "STCW", isMandatory: true },
+  { docType: "CDC", isMandatory: true },
+  { docType: "PASSPORT", isMandatory: true },
+  { docType: "MEDICAL_FITNESS", isMandatory: true },
+  { docType: "COC", isMandatory: false, note: "Officer / senior ranks only" },
+];
+
+export const RANK_DOC_REQUIREMENTS: RankDocReq[] = RANKS.flatMap((rank) => {
+  const reqs: RankDocReq[] = COMMON.map((c) => ({ rankCode: rank.code, ...c }));
+  if (rank.isSeafarer) {
+    reqs.push(...SEAFARER.map((s) => ({ rankCode: rank.code, ...s })));
+  }
+  if (rank.code === "DRV") {
+    reqs.push({ rankCode: "DRV", docType: "DRIVING_LICENSE", isMandatory: true });
+  }
+  return reqs;
+});
diff --git a/App/prisma/schema.prisma b/App/prisma/schema.prisma
index c33e499..2458040 100644
--- a/App/prisma/schema.prisma
+++ b/App/prisma/schema.prisma
@@ -15,6 +15,7 @@ enum Role {
   SUPERUSER
   AUDITOR
   ADMIN
+  SITE_STAFF
 }
 
 enum POStatus {
@@ -60,6 +61,32 @@ enum RequestStatus {
   DENIED
 }
 
+// ─── Crewing (feature-flagged: NEXT_PUBLIC_CREWING_ENABLED) ──────────────────
+// Phase 1 (Foundations) lands only the reference-data layer. The lifecycle
+// models/enums (Requisition, Application, Assignment, …) arrive in later phases.
+// See wiki Crewing-Implementation-Spec §12.
+
+// Org-chart grouping for a Rank. Drives reporting/segmentation, not login.
+enum RankCategory {
+  OPERATIONAL
+  SUPPORT
+}
+
+// The seafarer/crew document set a rank may be required to hold. Drives
+// candidate vetting and crew uploads via RankDocRequirement.
+enum SeafarerDocType {
+  STCW
+  AADHAAR
+  PAN
+  PASSPORT
+  CDC
+  COC
+  PHOTOGRAPH
+  DRIVING_LICENSE
+  MEDICAL_FITNESS
+  CONTRACT_LETTER
+}
+
 model User {
   id           String   @id @default(cuid())
   employeeId   String   @unique
@@ -375,3 +402,43 @@ model Notification {
   userId String
   user   User           @relation(fields: [userId], references: [id])
 }
+
+// ─── Crewing reference data ──────────────────────────────────────────────────
+
+// The crew org hierarchy. A self-referential tree (parent/children), exactly
+// like the Account accounting-code hierarchy. Reference data managed at
+// /admin/ranks. `grantsLogin` is true only for the three management ranks
+// (PM, Assistant PM, Site In-charge) — every other rank is a crew member /
+// data subject with no portal account. See Crewing-Data-Model §2.
+model Rank {
+  id          String       @id @default(cuid())
+  code        String       @unique
+  name        String
+  description String?
+  category    RankCategory @default(OPERATIONAL)
+  isSeafarer  Boolean      @default(false)
+  grantsLogin Boolean      @default(false)
+  isActive    Boolean      @default(true)
+  createdAt   DateTime     @default(now())
+  updatedAt   DateTime     @updatedAt
+
+  parentId String?
+  parent   Rank?  @relation("RankHierarchy", fields: [parentId], references: [id])
+  children Rank[] @relation("RankHierarchy")
+
+  docRequirements RankDocRequirement[]
+}
+
+// Which documents a rank is required (or conditionally required) to hold.
+// `isMandatory = false` is the "conditional" tag in the UI.
+model RankDocRequirement {
+  id          String          @id @default(cuid())
+  rankId      String
+  rank        Rank            @relation(fields: [rankId], references: [id], onDelete: Cascade)
+  docType     SeafarerDocType
+  isMandatory Boolean         @default(true)
+  note        String?
+  createdAt   DateTime        @default(now())
+
+  @@unique([rankId, docType])
+}
diff --git a/App/prisma/seed-prod.ts b/App/prisma/seed-prod.ts
index 80b7f48..2cf04cb 100644
--- a/App/prisma/seed-prod.ts
+++ b/App/prisma/seed-prod.ts
@@ -13,6 +13,7 @@
 
 import { PrismaClient, Role } from "@prisma/client";
 import { ACCOUNTING_CODES } from "./accounting-codes-data";
+import { seedRanks } from "./seed-ranks";
 import bcrypt from "bcryptjs";
 
 const hash = (p: string) => bcrypt.hash(p, 12);
@@ -235,6 +236,10 @@ async function main() {
   }).length;
   console.log(`   ✓ ${ACCOUNTING_CODES.length} codes (${leafCount} selectable leaf items)`);
 
+  // ── Crewing reference data (ranks + document rules) ──────────────────────────
+  console.log("\n⚓  Seeding crew ranks…");
+  await seedRanks(db);
+
   console.log("\n✅  Production seed complete.");
 }
 
diff --git a/App/prisma/seed-ranks.ts b/App/prisma/seed-ranks.ts
new file mode 100644
index 0000000..aa012b3
--- /dev/null
+++ b/App/prisma/seed-ranks.ts
@@ -0,0 +1,56 @@
+// Shared, idempotent seeding of the crewing reference data (ranks + their
+// required-document rules). Used by both the dev seed (seed.ts) and the
+// production seed (seed-prod.ts). Two passes mirror the accounting-code seed:
+// upsert every rank by code, then link parents, then upsert doc requirements.
+
+import type { PrismaClient } from "@prisma/client";
+import { RANKS } from "./rank-data";
+import { RANK_DOC_REQUIREMENTS } from "./rank-doc-data";
+
+export async function seedRanks(db: PrismaClient) {
+  const rankIdMap = new Map<string, string>();
+
+  // Pass 1: upsert all ranks (no parent yet) to obtain ids.
+  for (const r of RANKS) {
+    const rec = await db.rank.upsert({
+      where: { code: r.code },
+      update: {
+        name: r.name,
+        category: r.category,
+        isSeafarer: r.isSeafarer,
+        grantsLogin: r.grantsLogin,
+      },
+      create: {
+        code: r.code,
+        name: r.name,
+        category: r.category,
+        isSeafarer: r.isSeafarer,
+        grantsLogin: r.grantsLogin,
+      },
+    });
+    rankIdMap.set(r.code, rec.id);
+  }
+
+  // Pass 2: link parent relationships.
+  for (const r of RANKS) {
+    if (r.parentCode) {
+      const parentId = rankIdMap.get(r.parentCode);
+      if (parentId) {
+        await db.rank.update({ where: { code: r.code }, data: { parentId } });
+      }
+    }
+  }
+
+  // Document requirements (keyed by the rank + docType compound unique).
+  for (const req of RANK_DOC_REQUIREMENTS) {
+    const rankId = rankIdMap.get(req.rankCode);
+    if (!rankId) continue;
+    await db.rankDocRequirement.upsert({
+      where: { rankId_docType: { rankId, docType: req.docType } },
+      update: { isMandatory: req.isMandatory, note: req.note ?? null },
+      create: { rankId, docType: req.docType, isMandatory: req.isMandatory, note: req.note ?? null },
+    });
+  }
+
+  console.log(`   ✓ ${RANKS.length} ranks, ${RANK_DOC_REQUIREMENTS.length} document requirements`);
+}
diff --git a/App/prisma/seed.ts b/App/prisma/seed.ts
index 26e3446..f1e34dd 100644
--- a/App/prisma/seed.ts
+++ b/App/prisma/seed.ts
@@ -1,6 +1,7 @@
 import { PrismaClient, Role } from "@prisma/client";
 import bcrypt from "bcryptjs";
 import { ACCOUNTING_CODES } from "./accounting-codes-data";
+import { seedRanks } from "./seed-ranks";
 
 const db = new PrismaClient();
 
@@ -203,6 +204,9 @@ async function main() {
     }
   }
 
+  // ─── Crewing: Ranks (hierarchical) + document requirements ───────────────────
+  await seedRanks(db);
+
   // Convenience variables for PO seed data below (map to real leaf codes)
   const accTechOps = { id: codeIdMap.get("401012")! }; // Spares- Others
   const accCrewMgt = { id: codeIdMap.get("500101")! }; // Salary
diff --git a/App/tests/integration/admin-ranks.test.ts b/App/tests/integration/admin-ranks.test.ts
new file mode 100644
index 0000000..ca32caf
--- /dev/null
+++ b/App/tests/integration/admin-ranks.test.ts
@@ -0,0 +1,145 @@
+/**
+ * Integration tests for the Ranks & Documents admin server actions (Crewing
+ * Phase 1 foundations). Covers create/update/delete, parent linking, the
+ * cycle/children guards, doc-requirement add/remove, and permission gating.
+ */
+import { vi, describe, it, expect, beforeAll, afterEach } from "vitest";
+
+vi.mock("@/auth", () => ({ auth: vi.fn() }));
+vi.mock("next/cache", () => ({ revalidatePath: vi.fn() }));
+// The actions are gated by the crewing flag; force it on for the test run.
+vi.mock("@/lib/feature-flags", () => ({ CREWING_ENABLED: true, INVENTORY_ENABLED: true }));
+
+import { auth } from "@/auth";
+import { db } from "@/lib/db";
+import {
+  createRank,
+  updateRank,
+  deleteRank,
+  addRankDocRequirement,
+  removeRankDocRequirement,
+} from "@/app/(portal)/admin/ranks/actions";
+import { makeSession, getSeedUser, fd } from "./helpers";
+
+const PREFIX = "ITRANK_";
+let managerId: string;
+
+const asManager = () =>
+  vi.mocked(auth as unknown as () => Promise<unknown>).mockResolvedValue(makeSession(managerId, "MANAGER"));
+
+beforeAll(async () => {
+  const mgr = await getSeedUser("manager@pelagia.local");
+  managerId = mgr.id;
+});
+
+afterEach(async () => {
+  // Break self-relations before deleting so parent/child FK order never bites.
+  const rows = await db.rank.findMany({ where: { code: { startsWith: PREFIX } }, select: { id: true } });
+  const ids = rows.map((r) => r.id);
+  if (ids.length) {
+    await db.rankDocRequirement.deleteMany({ where: { rankId: { in: ids } } });
+    await db.rank.updateMany({ where: { id: { in: ids } }, data: { parentId: null } });
+    await db.rank.deleteMany({ where: { id: { in: ids } } });
+  }
+  vi.clearAllMocks();
+});
+
+describe("createRank", () => {
+  it("creates a rank with its flags", async () => {
+    asManager();
+    const res = await createRank(
+      fd({ code: `${PREFIX}PM`, name: "Test PM", category: "OPERATIONAL", grantsLogin: "on" })
+    );
+    expect(res).toEqual({ ok: true });
+
+    const rank = await db.rank.findUnique({ where: { code: `${PREFIX}PM` } });
+    expect(rank?.grantsLogin).toBe(true);
+    expect(rank?.isSeafarer).toBe(false);
+    expect(rank?.category).toBe("OPERATIONAL");
+  });
+
+  it("rejects a duplicate code", async () => {
+    asManager();
+    await createRank(fd({ code: `${PREFIX}DUP`, name: "One", category: "SUPPORT" }));
+    const res = await createRank(fd({ code: `${PREFIX}DUP`, name: "Two", category: "SUPPORT" }));
+    expect("error" in res).toBe(true);
+  });
+
+  it("is rejected for roles without manage_ranks", async () => {
+    vi.mocked(auth as unknown as () => Promise<unknown>).mockResolvedValue(makeSession(managerId, "SITE_STAFF"));
+    const res = await createRank(fd({ code: `${PREFIX}NO`, name: "Nope", category: "OPERATIONAL" }));
+    expect(res).toEqual({ error: "Unauthorized" });
+    expect(await db.rank.findUnique({ where: { code: `${PREFIX}NO` } })).toBeNull();
+  });
+});
+
+describe("updateRank — parent linking & cycle guard", () => {
+  it("links a child to its parent", async () => {
+    asManager();
+    await createRank(fd({ code: `${PREFIX}P`, name: "Parent", category: "OPERATIONAL" }));
+    const parent = await db.rank.findUniqueOrThrow({ where: { code: `${PREFIX}P` } });
+    await createRank(fd({ code: `${PREFIX}C`, name: "Child", category: "OPERATIONAL" }));
+    const child = await db.rank.findUniqueOrThrow({ where: { code: `${PREFIX}C` } });
+
+    const res = await updateRank(
+      fd({ id: child.id, code: `${PREFIX}C`, name: "Child", category: "OPERATIONAL", parentId: parent.id })
+    );
+    expect(res).toEqual({ ok: true });
+    expect((await db.rank.findUnique({ where: { id: child.id } }))?.parentId).toBe(parent.id);
+  });
+
+  it("refuses to make a rank its own ancestor", async () => {
+    asManager();
+    await createRank(fd({ code: `${PREFIX}A`, name: "A", category: "OPERATIONAL" }));
+    const a = await db.rank.findUniqueOrThrow({ where: { code: `${PREFIX}A` } });
+    await createRank(fd({ code: `${PREFIX}B`, name: "B", category: "OPERATIONAL", parentId: a.id }));
+    const b = await db.rank.findUniqueOrThrow({ where: { code: `${PREFIX}B` } });
+
+    // Try to make A report to B (its own descendant) → cycle.
+    const res = await updateRank(fd({ id: a.id, code: `${PREFIX}A`, name: "A", category: "OPERATIONAL", parentId: b.id }));
+    expect("error" in res).toBe(true);
+  });
+});
+
+describe("deleteRank", () => {
+  it("blocks deletion when the rank has sub-ranks", async () => {
+    asManager();
+    await createRank(fd({ code: `${PREFIX}TOP`, name: "Top", category: "OPERATIONAL" }));
+    const top = await db.rank.findUniqueOrThrow({ where: { code: `${PREFIX}TOP` } });
+    await createRank(fd({ code: `${PREFIX}SUB`, name: "Sub", category: "OPERATIONAL", parentId: top.id }));
+
+    const res = await deleteRank(top.id);
+    expect("error" in res).toBe(true);
+    expect(await db.rank.findUnique({ where: { id: top.id } })).not.toBeNull();
+  });
+
+  it("deletes a leaf rank and cascades its doc requirements", async () => {
+    asManager();
+    await createRank(fd({ code: `${PREFIX}LEAF`, name: "Leaf", category: "OPERATIONAL" }));
+    const leaf = await db.rank.findUniqueOrThrow({ where: { code: `${PREFIX}LEAF` } });
+    await addRankDocRequirement(fd({ rankId: leaf.id, docType: "PASSPORT", isMandatory: "on" }));
+
+    const res = await deleteRank(leaf.id);
+    expect(res).toEqual({ ok: true });
+    expect(await db.rankDocRequirement.findMany({ where: { rankId: leaf.id } })).toHaveLength(0);
+  });
+});
+
+describe("rank document requirements", () => {
+  it("adds (upserting) and removes a requirement", async () => {
+    asManager();
+    await createRank(fd({ code: `${PREFIX}DOC`, name: "Doc", category: "OPERATIONAL", isSeafarer: "on" }));
+    const rank = await db.rank.findUniqueOrThrow({ where: { code: `${PREFIX}DOC` } });
+
+    await addRankDocRequirement(fd({ rankId: rank.id, docType: "STCW", isMandatory: "on" }));
+    // Upsert: same docType again flips it to conditional rather than duplicating.
+    await addRankDocRequirement(fd({ rankId: rank.id, docType: "STCW", isMandatory: "false" }));
+    const reqs = await db.rankDocRequirement.findMany({ where: { rankId: rank.id } });
+    expect(reqs).toHaveLength(1);
+    expect(reqs[0].isMandatory).toBe(false);
+
+    const rm = await removeRankDocRequirement(reqs[0].id);
+    expect(rm).toEqual({ ok: true });
+    expect(await db.rankDocRequirement.findMany({ where: { rankId: rank.id } })).toHaveLength(0);
+  });
+});
diff --git a/App/tests/unit/permissions-crewing.test.ts b/App/tests/unit/permissions-crewing.test.ts
new file mode 100644
index 0000000..1f883d9
--- /dev/null
+++ b/App/tests/unit/permissions-crewing.test.ts
@@ -0,0 +1,104 @@
+import { describe, it, expect, afterEach, vi } from "vitest";
+import { hasPermission } from "@/lib/permissions";
+
+// Verifies the crewing rows of the §6 grant matrix in the wiki
+// Crewing-Implementation-Spec are wired up exactly as written.
+describe("Crewing permissions (spec §6)", () => {
+  it("SITE_STAFF holds its site-level grants", () => {
+    for (const p of [
+      "request_relief_cover",
+      "sign_off_crew",
+      "view_crew_records",
+      "upload_crew_records",
+      "issue_ppe",
+      "apply_leave",
+      "record_attendance",
+      "view_attendance",
+      "raise_appraisal",
+    ] as const) {
+      expect(hasPermission("SITE_STAFF", p)).toBe(true);
+    }
+  });
+
+  it("SITE_STAFF cannot raise requisitions or decide leave or do any purchasing", () => {
+    expect(hasPermission("SITE_STAFF", "raise_requisition")).toBe(false);
+    expect(hasPermission("SITE_STAFF", "decide_leave")).toBe(false);
+    expect(hasPermission("SITE_STAFF", "create_po")).toBe(false);
+    expect(hasPermission("SITE_STAFF", "manage_ranks")).toBe(false);
+  });
+
+  it("MPO (MANNING) has NO attendance or leave access (R5/R1)", () => {
+    expect(hasPermission("MANNING", "record_attendance")).toBe(false);
+    expect(hasPermission("MANNING", "view_attendance")).toBe(false);
+    expect(hasPermission("MANNING", "apply_leave")).toBe(false);
+    expect(hasPermission("MANNING", "decide_leave")).toBe(false);
+  });
+
+  it("MPO sources recruitment but never gives final approvals", () => {
+    expect(hasPermission("MANNING", "raise_requisition")).toBe(true);
+    expect(hasPermission("MANNING", "manage_candidates")).toBe(true);
+    expect(hasPermission("MANNING", "record_interview_result")).toBe(true);
+    expect(hasPermission("MANNING", "verify_site_records")).toBe(true);
+    // Approvals are Manager-only:
+    expect(hasPermission("MANNING", "approve_salary_structure")).toBe(false);
+    expect(hasPermission("MANNING", "select_candidate")).toBe(false);
+    expect(hasPermission("MANNING", "approve_interview_waiver")).toBe(false);
+  });
+
+  it("Manager owns every crewing approval gate (R1/R2/R8)", () => {
+    for (const p of [
+      "decide_leave",
+      "approve_interview_waiver",
+      "approve_salary_structure",
+      "select_candidate",
+      "approve_appraisal",
+      "approve_wage_report",
+      "generate_wage_report",
+    ] as const) {
+      expect(hasPermission("MANAGER", p)).toBe(true);
+    }
+  });
+
+  it("Accounts verifies bank/EPF and sees wages only (R11)", () => {
+    expect(hasPermission("ACCOUNTS", "verify_bank_epf")).toBe(true);
+    expect(hasPermission("ACCOUNTS", "view_wage_report")).toBe(true);
+    expect(hasPermission("ACCOUNTS", "view_crew_records")).toBe(true);
+    expect(hasPermission("ACCOUNTS", "verify_site_records")).toBe(false);
+    expect(hasPermission("ACCOUNTS", "record_attendance")).toBe(false);
+  });
+
+  it("manage_ranks is Manager + Admin only (not SuperUser)", () => {
+    expect(hasPermission("MANAGER", "manage_ranks")).toBe(true);
+    expect(hasPermission("ADMIN", "manage_ranks")).toBe(true);
+    expect(hasPermission("SUPERUSER", "manage_ranks")).toBe(false);
+    expect(hasPermission("MANNING", "manage_ranks")).toBe(false);
+  });
+
+  it("Auditor keeps read-only crewing visibility", () => {
+    expect(hasPermission("AUDITOR", "view_requisitions")).toBe(true);
+    expect(hasPermission("AUDITOR", "view_crew_records")).toBe(true);
+    expect(hasPermission("AUDITOR", "view_wage_report")).toBe(true);
+    expect(hasPermission("AUDITOR", "raise_requisition")).toBe(false);
+  });
+});
+
+describe("CREWING_ENABLED flag", () => {
+  afterEach(() => {
+    vi.unstubAllEnvs();
+    vi.resetModules();
+  });
+
+  it("defaults off when the env var is unset", async () => {
+    vi.resetModules();
+    vi.stubEnv("NEXT_PUBLIC_CREWING_ENABLED", "");
+    const flags = await import("@/lib/feature-flags");
+    expect(flags.CREWING_ENABLED).toBe(false);
+  });
+
+  it("is on only for the exact string \"true\"", async () => {
+    vi.resetModules();
+    vi.stubEnv("NEXT_PUBLIC_CREWING_ENABLED", "true");
+    const flags = await import("@/lib/feature-flags");
+    expect(flags.CREWING_ENABLED).toBe(true);
+  });
+});