diff --git a/scenarios/postgres-node.yml b/scenarios/postgres-node.yml
new file mode 100644
index 0000000..36d7ad0
--- /dev/null
+++ b/scenarios/postgres-node.yml
@@ -0,0 +1,30 @@
+# One machine that becomes a mesh and grants a consumer a database from an assigned postgres provider.
+#
+# The redis mesh-grant bed proves the whole provider/consumer contract for a cache; this proves it for
+# a database (novox/hq ADR 0052/0053): postgres's runtime carries psql, its provisioner creates a role
+# and database under the login the mesh derived with the password the mesh minted, and a consumer
+# connects to its own database with only what the mesh delivered.
+scenario: postgres-node
+
+segments:
+  hosting:
+    kind: public
+    cidr: [192.0.2.0/24]
+
+machines:
+  anchor:
+    at: { segment: hosting, address: [192.0.2.10] }
+    inbound: allow
+    memory: 3GiB
+    cpus: 2
+
+images:
+  - postgres:17-alpine
+  - cloudamqp/lavinmq:latest
+  - mesh-control:development
+  # postgres's runtime, built by scripts/build-module-runtime.sh postgres (it carries psql), stocked
+  # into the scenario's own registry.
+  - mesh-runtime-postgres:development
+
+place:
+  all: [host, runtime]
diff --git a/test/integration/postgres-grant-end-to-end.test.ts b/test/integration/postgres-grant-end-to-end.test.ts
new file mode 100644
index 0000000..240bfdb
--- /dev/null
+++ b/test/integration/postgres-grant-end-to-end.test.ts
@@ -0,0 +1,247 @@
+/**
+ * The whole grant for a database, mesh-driven — novox/hq ADR 0052/0053, the postgres case.
+ *
+ * The redis bed proves the provider/consumer contract for a cache. This proves it for a database, on
+ * a provider whose code shells out to `psql` (so the runtime image carries it): postgres is assigned,
+ * a consumer that requires postgres-database is assigned, and the mesh mints one password, seals a
+ * copy to each end, and writes each its file. postgres's provisioner — reading only the mesh's
+ * contributions — creates a role and a database under the login the mesh derived, with the password
+ * the mesh minted. The proof is the consumer connecting to its database with the credential the mesh
+ * delivered it. Nothing is placed by the test.
+ *
+ *   MESH_LAB_HOST_BINARY=.../mesh-host   MESH_LAB_BUNDLE=.../examples/substrate-first-node.lock
+ *   scripts/build-module-runtime.sh postgres builds mesh-runtime-postgres:development (with psql),
+ *   which scenarios/postgres-node.yml stocks.
+ */
+
+import { test, before, after } from "node:test";
+import assert from "node:assert/strict";
+import { existsSync, readFileSync } from "node:fs";
+import { loadScenario } from "../../src/declaration/parse.ts";
+import { raise } from "../../src/lifecycle/raise.ts";
+import { destroy, exec } from "../../src/lifecycle/operate.ts";
+import { hostBinaryPath, HOST_PATH } from "../../src/lifecycle/place.ts";
+import { labIsUsable, destroyAll } from "./harness.ts";
+
+const capability = await labIsUsable();
+const binary = hostBinaryPath();
+const bundle = process.env["MESH_LAB_BUNDLE"] ?? "";
+
+const skip = !capability.usable
+  ? `lab not usable: ${capability.why}`
+  : !binary || !existsSync(binary)
+    ? "MESH_LAB_HOST_BINARY is not set to a built mesh-host"
+    : !bundle || !existsSync(bundle)
+      ? "MESH_LAB_BUNDLE is not set to a substrate bundle (mesh-host examples/)"
+      : false;
+
+const SCENARIO = "postgres-node";
+const MACHINE = "anchor";
+
+let instanceId = "";
+let stocked: string[] = [];
+
+function quote(s: string): string {
+  return `'${s.replaceAll("'", `'\\''`)}'`;
+}
+
+async function on(command: string, timeoutMs?: number): Promise<{ out: string; ok: boolean }> {
+  const { stdout } = await exec(instanceId, MACHINE, [
+    "sh", "-c", `exec 2>&1\n${command}\necho "__exit=$?"`,
+  ], timeoutMs);
+  const marker = stdout.lastIndexOf("__exit=");
+  if (marker < 0) return { out: stdout, ok: false };
+  return { out: stdout.slice(0, marker), ok: stdout.slice(marker + 7).trim() === "0" };
+}
+
+async function must(command: string, timeoutMs?: number): Promise<string> {
+  const { out, ok } = await on(command, timeoutMs);
+  if (!ok) throw new Error(`${MACHINE}: ${command}\n${out}`);
+  return out;
+}
+
+async function mesh(command: string, timeoutMs?: number): Promise<string> {
+  return must(`docker exec mesh-control /mesh-control ${command}`, timeoutMs);
+}
+
+function pinned(repository: string): string {
+  const found = stocked.find((r) => r.slice(r.indexOf("/") + 1, r.indexOf("@")) === repository);
+  assert.ok(found, `the scenario stocks no ${repository}; it serves ${stocked.join(", ")}`);
+  return found;
+}
+
+function bundleFor(images: string[]): string {
+  let text = readFileSync(bundle, "utf8");
+  for (const ref of images) {
+    const repository = ref.slice(ref.indexOf("/") + 1, ref.indexOf("@"));
+    const escaped = repository.replaceAll("/", "\\/").replaceAll(".", "\\.");
+    text = text.replaceAll(new RegExp(`[A-Za-z0-9_.:-]+\\/${escaped}@sha256:[0-9a-f]+`, "g"), ref);
+  }
+  return text;
+}
+
+function tokenFrom(said: string): string {
+  const found = said.split("\n").map((l) => l.trim()).find((l) => l.length > 100 && !l.includes(" "));
+  assert.ok(found, `no token in:\n${said}`);
+  return found;
+}
+
+async function settled(withinMs = 480_000): Promise<void> {
+  const until = Date.now() + withinMs;
+  let last = "";
+  while (Date.now() < until) {
+    const asked = await on(`docker exec mesh-control /mesh-control status --json`);
+    if (asked.ok) {
+      try {
+        const state = JSON.parse(asked.out) as {
+          wrong: { node: string; outcome: string }[];
+          waiting: { node: string }[];
+          reported: { node: string; outcome: string; current: boolean }[];
+        };
+        const bad = state.wrong.find((w) => w.node === MACHINE);
+        if (bad) throw new Error(`${MACHINE} did not apply what it was sent: ${bad.outcome}\n${asked.out}`);
+        const word = state.reported.find((r) => r.node === MACHINE);
+        if (!state.waiting.some((w) => w.node === MACHINE) && word?.outcome === "applied" && word.current) return;
+        last = asked.out;
+      } catch (err) {
+        if (err instanceof Error && err.message.includes("did not apply")) throw err;
+        last = asked.out;
+      }
+    }
+    await new Promise((r) => setTimeout(r, 5000));
+  }
+  throw new Error(`${MACHINE} never caught up within ${Math.round(withinMs / 1000)}s. Last:\n${last}`);
+}
+
+before(async () => {
+  if (skip) return;
+
+  const raised = await raise(loadScenario(`scenarios/${SCENARIO}.yml`), {
+    onProgress: (m) => console.log(`raise: ${m}`),
+  });
+  instanceId = raised.instanceId;
+  stocked = raised.images;
+
+  await must(`cat > /tmp/substrate.lock <<'MESHBUNDLE'\n${bundleFor(raised.images)}\nMESHBUNDLE`);
+  await must(`${HOST_PATH} apply /tmp/substrate.lock`, 600_000);
+  const up = await must(`docker ps --format '{{.Names}}'`);
+  for (const c of ["mesh-store", "mesh-broker", "mesh-control"]) {
+    assert.match(up, new RegExp(c), `the substrate did not raise ${c}:\n${up}`);
+  }
+
+  await mesh(`node add ${MACHINE}`);
+  const token = tokenFrom(await mesh(`token issue --node ${MACHINE}`));
+  await must(`${HOST_PATH} enrol --token ${quote(token)}`);
+  await must(`nohup ${HOST_PATH} run > /var/log/mesh-host.log 2>&1 & sleep 3`);
+}, { timeout: 1_800_000 });
+
+after(async () => {
+  if (instanceId) await destroy(instanceId);
+  await destroyAll(`${SCENARIO}-`);
+}, { timeout: 600_000 });
+
+test("the mesh grants a consumer a postgres database, and the credential it delivers connects", {
+  skip, timeout: 900_000,
+}, async () => {
+  // The PROVIDER: postgres in its committed shape — server and a broker-bound runtime (carrying psql)
+  // on the private postgres network, the runtime running the provisioner.
+  const postgresManifest = JSON.stringify({
+    module: "postgres",
+    version: "1",
+    provides: [{ name: "postgres-database", scope: "mesh" }],
+    serves: { "postgres-database": {} },
+    emits: ["module.postgres.database.provisioned", "module.postgres.database.deprovisioned"],
+    consumes: ["module.postgres.database.provisioned", "module.postgres.database.deprovisioned"],
+    receives: { "postgres-database": "/var/lib/postgres/grants/mesh.json" },
+    grants: { "postgres-database": "/var/lib/postgres/grants" },
+    "own-secrets": { superuser: "/var/lib/postgres/superuser.secret", broker: "/var/lib/mesh/postgres/broker" },
+    resources: [
+      { id: "mesh-state", type: "directory", path: "/var/lib/mesh/postgres", mode: "0700" },
+      { id: "state", type: "directory", path: "/var/lib/postgres", mode: "0700" },
+      { id: "grants", type: "directory", path: "/var/lib/postgres/grants", mode: "0700" },
+      { id: "superuser-env", type: "file", path: "/var/lib/postgres/superuser.env", mode: "0600", content: "POSTGRES_PASSWORD=${secret:superuser}\n" },
+      { id: "data", type: "directory", path: "/services/postgres/db-data", mode: "0700" },
+      { id: "net", type: "network", name: "postgres" },
+      {
+        // No published port here: the substrate's own store already holds host :5432 on this
+        // single-node bed, and the consumer reaches postgres over the private network by name. The
+        // committed manifest publishes it for cross-node consumers, which is a different node.
+        id: "server", type: "container", name: "postgres", image: pinned("postgres"), network: "postgres",
+        env: { POSTGRES_USER: "postgres", POSTGRES_DB: "postgres" },
+        "env-file": ["/var/lib/postgres/superuser.env"],
+        volumes: ["/services/postgres/db-data:/var/lib/postgresql/data"],
+      },
+      {
+        id: "runtime", type: "container", name: "mesh-postgres", image: pinned("mesh-runtime-postgres"),
+        network: "postgres",
+        volumes: [
+          "/var/lib/mesh/postgres/broker:/run/secrets/broker:ro",
+          "/var/lib/postgres/grants:/var/lib/postgres/grants:ro",
+          "/var/lib/postgres/superuser.secret:/run/secrets/superuser:ro",
+        ],
+        env: {
+          MESH_BROKER_FILE: "/run/secrets/broker",
+          MESH_RECEIVES: "/var/lib/postgres/grants/mesh.json",
+          MESH_PROVISION_POSTGRES: "postgres://postgres@postgres:5432/postgres?sslmode=disable",
+          MESH_PROVISION_PASSWORD_FILE: "/run/secrets/superuser",
+        },
+      },
+    ],
+  });
+
+  // The CONSUMER: a module that requires postgres-database and contributes a name so it asks.
+  const consumerManifest = JSON.stringify({
+    module: "dbuser",
+    version: "1",
+    requires: ["postgres-database"],
+    contributes: { "postgres-database": { name: "dbuser" } },
+    binds: { "postgres-database": "/var/lib/dbuser/db.json" },
+    secrets: { "postgres-database": "/var/lib/dbuser/db.secret" },
+    resources: [{ id: "state", type: "directory", path: "/var/lib/dbuser", mode: "0700" }],
+  });
+
+  await must(`printf %s ${quote(postgresManifest)} > /tmp/postgres.json && docker cp /tmp/postgres.json mesh-control:/postgres.json`);
+  await mesh("module add /postgres.json");
+  await mesh(`module issue postgres --node ${MACHINE}`);
+  await mesh(`assign ${MACHINE} postgres`);
+
+  await must(`printf %s ${quote(consumerManifest)} > /tmp/dbuser.json && docker cp /tmp/dbuser.json mesh-control:/dbuser.json`);
+  await mesh("module add /dbuser.json");
+  await mesh(`assign ${MACHINE} dbuser`);
+
+  await mesh(`push ${MACHINE}`);
+  await settled();
+
+  // The mesh delivered the consumer its bound file and its unsealed password.
+  let boundRaw = "";
+  const untilBound = Date.now() + 60_000;
+  while (Date.now() < untilBound) {
+    const got = await on(`cat /var/lib/dbuser/db.json 2>/dev/null`);
+    if (got.ok && /"as"/.test(got.out)) { boundRaw = got.out; break; }
+    await new Promise((r) => setTimeout(r, 3000));
+  }
+  assert.match(boundRaw, /"as"/, `the consumer was never told about its database:\n${boundRaw}`);
+  const bound = JSON.parse(boundRaw) as { as: string; provision: string };
+  assert.equal(bound.provision, "postgres-database");
+  const as = bound.as;
+  const password = (await must(`cat /var/lib/dbuser/db.secret`)).trim();
+  assert.ok(as && password, `the consumer's login or password was empty (as=${as})`);
+
+  // THE PROOF: connect to postgres as the consumer, with the login and password the mesh delivered
+  // it, to the database postgres's provisioner created — a real password-checked TCP connection (the
+  // runtime carries psql). A `1` back means the role, the database, and the password all line up
+  // across the two ends. A provisioner that set a different password answers "authentication failed".
+  const conn = `postgresql://${as}:${encodeURIComponent(password)}@postgres:5432/${as}?sslmode=disable`;
+  let out = { out: "", ok: false };
+  const untilConn = Date.now() + 90_000;
+  while (Date.now() < untilConn) {
+    out = await on(`docker exec mesh-postgres psql ${quote(conn)} -tAc 'select 1' 2>&1`);
+    if (out.ok && /^1$/m.test(out.out)) break;
+    if (/authentication failed/i.test(out.out)) break; // fast-fail: the credential is wrong
+    await new Promise((r) => setTimeout(r, 3000));
+  }
+  assert.doesNotMatch(out.out, /authentication failed/i,
+    `the consumer could not authenticate with the mesh's password — the two ends do not agree:\n${out.out}`);
+  assert.match(out.out, /^1$/m,
+    `the consumer could not connect to its granted database as ${as}:\n${out.out}\n---\n${(await on(`docker logs mesh-postgres 2>&1 | tail -30`)).out}`);
+});