anthropic-bed: prove model-access refreshes on the manager node

A lab bed for Phase C of model-access (ADR 0050), OAuth endpoint stubbed. It drives the real runtime images through the whole flow: the manager seals a refresh token at rest and opens it on the manager node alone, mesh-control is handed only the access token and an opaque re-sealed envelope via licence submit-refresh, and the consumer writes an access-token-only credential. Asserts the refresh token -- original and rotated -- is nowhere on the consuming node and only ciphertext in the control plane's database. build-module-runtime.sh also compiles adopt/refresh/apply/usage entrypoints. Stubbed and flagged: the vendor endpoint, the manager node's private key (mounted; a host capability to deliver it does not exist today), and the submit transport (the test invokes the CLI on the manager's output). Claude-Session: https://claude.ai/code/session_01LrgweAeERJYBg88c5cKDzF
2026-09-07 01:00:37 +02:00
parent 0a132aa00e
commit 6be5072565
3 changed files with 446 additions and 2 deletions
@@ -0,0 +1,45 @@
+# One machine that becomes a mesh, then plays out the whole model-access refreshable-grant flow for
+# Anthropic (novox/hq ADR 0050, Phase C) with the vendor's OAuth endpoint STUBBED — no real Anthropic
+# is reached. The bed proves the one property the carve-out rests on: the refresh token is opened only
+# on the manager node, the control plane seals and delivers only the ACCESS token, and a consuming
+# node writes an access-token-only credential and is never given a refresh token.
+#
+# The flow the test drives (OAuth stubbed, so it is the FLOW that is proven, not the vendor):
+#   manager opens the at-rest envelope on the manager node  ->  calls the stub token endpoint  ->
+#   submits back only { access token, re-sealed refresh envelope }  ->  mesh-control seals the access
+#   token per holder  ->  the consumer runtime writes ~/.claude/.credentials.json, access-token-only.
+#
+#   MESH_LAB_HOST_BINARY=.../mesh-host   MESH_LAB_BUNDLE=.../examples/substrate-first-node.lock
+#   Build BOTH runtime images into the local daemon first (the scenario stocks and serves them by
+#   digest, which is where the host pulls them from):
+#     scripts/build-module-runtime.sh anthropic-manager  /tmp/anthropic-manager.tar
+#     scripts/build-module-runtime.sh anthropic-consumer  /tmp/anthropic-consumer.tar
+#   (the tar output is incidental — the build also tags the image into the local docker daemon, which
+#   is what raise() stocks.) The stub OAuth endpoint is a tiny node server the test runs from the
+#   manager runtime image itself, so no extra image is needed.
+scenario: anthropic-bed
+
+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:
+  # The first-node substrate: store, broker, control.
+  - postgres:17-alpine
+  - cloudamqp/lavinmq:latest
+  - mesh-control:development
+  # The two model-access runtimes, built by scripts/build-module-runtime.sh into the local daemon and
+  # stocked into the scenario's own registry, which is where the host pulls them from.
+  - mesh-runtime-anthropic-manager:development
+  - mesh-runtime-anthropic-consumer:development
+
+place:
+  all: [host, runtime]
@@ -20,8 +20,16 @@ BASE="${RUNTIME_BASE:-node:22-bookworm-slim}"

 ( cd "$MESH_SDK" && npm run build >/dev/null )
 ( cd "$MESH_TOOLS" && npm run build >/dev/null )
-# Compile whichever of the module's entrypoints exist.
-SRCS=(); for f in client.ts index.ts tools/index.ts provisioner/index.ts bootstrap/index.ts; do [ -f "$MOD/$f" ] && SRCS+=("$f"); done
+# Compile whichever of the module's entrypoints exist. Besides the serve-time entrypoints (tools,
+# events, provisioner) and the run-once bootstrap, a module may carry scheduled/one-shot entrypoints
+# it names in a `schedule`/`run-once` container's args (novox/hq ADR 0052/0053) — refresh/apply/usage
+# for the anthropic model-access modules. tsc pulls in their imports, so leaf files they use are
+# compiled with them.
+SRCS=(); for f in \
+  client.ts index.ts tools/index.ts provisioner/index.ts bootstrap/index.ts \
+  adopt/index.ts refresh/index.ts apply/index.ts usage/index.ts; do
+  [ -f "$MOD/$f" ] && SRCS+=("$f")
+done
 TSC="$MESH_SDK/node_modules/.bin/tsc"; ( cd "$MOD" && "$TSC" "${SRCS[@]}" --module NodeNext --moduleResolution NodeNext --target ES2022 --outDir dist >/dev/null )

 STAGE="$(mktemp -d)"; trap 'rm -rf "$STAGE"' EXIT
@@ -0,0 +1,391 @@
+/**
+ * The mesh plays out the model-access refreshable-grant flow for Anthropic end to end, with the
+ * vendor's OAuth endpoint STUBBED (novox/hq ADR 0050, Phase C). It proves the one property the
+ * carve-out rests on, and the reviewer will scrutinise it: the refresh token is opened ONLY on the
+ * manager node, the control plane is handed only the ACCESS token in the clear (plus an opaque
+ * re-sealed refresh envelope), and a consuming node writes an access-token-only credential and is
+ * never delivered a refresh token — nowhere on the machine, nowhere in the control plane's database.
+ *
+ * The flow, driven deterministically (the runtime images are the real ones the host pulled; the
+ * OAuth endpoint is a tiny node stub the test runs from the same image, so no vendor is reached):
+ *   1. adopt: the manager runtime seals a refresh token at rest to a node key pair (the seal runs on
+ *      the manager node; the plaintext never leaves it). The sealed envelope is stored via
+ *      `licence set-grant` — the control plane stores ciphertext it cannot open.
+ *   2. refresh: the manager runtime OPENS the envelope with the node's own key, calls the stub token
+ *      endpoint, and writes out ONLY { access token, re-sealed refresh envelope }.
+ *   3. submit: `licence submit-refresh` hands the control plane those two things — never the refresh
+ *      token in the clear — and it seals the access token to the consumer holder.
+ *   4. deliver: a push delivers the sealed access token to the consumer; the consumer runtime writes
+ *      ~/.claude/.credentials.json, access-token-only.
+ *
+ * STUBBED, and flagged in the report: (a) the vendor OAuth endpoint (a node stub); (b) the manager
+ * node's private sealing key, mounted as a test key pair — production needs a host capability to
+ * place the node private key where a manager module reads it, which mesh-host does not have today;
+ * (c) the submit transport (the test invokes `mesh-control licence submit-refresh` on the manager's
+ * output, standing in for the authenticated cross-node call a manager node would make).
+ *
+ *   MESH_LAB_HOST_BINARY=.../mesh-host   MESH_LAB_BUNDLE=.../examples/substrate-first-node.lock
+ *   Build both runtime images into the local daemon first:
+ *     scripts/build-module-runtime.sh anthropic-manager  /tmp/anthropic-manager.tar
+ *     scripts/build-module-runtime.sh anthropic-consumer  /tmp/anthropic-consumer.tar
+ */
+
+import { test, before, after } from "node:test";
+import assert from "node:assert/strict";
+import { existsSync, readFileSync } from "node:fs";
+import { generateKeyPairSync } from "node:crypto";
+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: ${capability.why}`
+  : !binary || !existsSync(binary)
+    ? "MESH_LAB_HOST_BINARY is not set to a built mesh-host"
+    : !bundle || !existsSync(bundle)
+      ? "MESH_LAB_BUNDLE is not set to a substrate bundle (mesh-host examples/)"
+      : false;
+
+const SCENARIO = "anthropic-bed";
+const MACHINE = "anchor";
+
+// The fake tokens the flow moves. The whole test is: the second reaches the consumer, the first never
+// does.
+const REFRESH_TOKEN = "rt-lab-refresh-must-never-be-delivered";
+const ACCESS_TOKEN = "at-lab-access-token-minted-by-the-stub";
+const ROTATED_REFRESH = "rt-lab-rotated-still-must-never-be-delivered";
+
+let instanceId = "";
+let stocked: string[] = [];
+
+function quote(s: string): string {
+  return `'${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);
+}
+
+async function meshTry(command: string): Promise<{ out: string; ok: boolean }> {
+  return on(`docker exec mesh-control /mesh-control ${command}`);
+}
+
+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;
+}
+
+/** A node key pair as the mesh records it: raw 32-byte X25519 keys, standard base64. */
+function nodeKeyPair(): { pub: string; priv: string } {
+  const kp = generateKeyPairSync("x25519");
+  const std = (b64url: string) => Buffer.from(b64url, "base64url").toString("base64");
+  return {
+    pub: std((kp.publicKey.export({ format: "jwk" }) as { x: string }).x),
+    priv: std((kp.privateKey.export({ format: "jwk" }) as { d: string }).d),
+  };
+}
+
+/** The local image id the host pulled for a runtime, so the test can drive it deterministically. */
+async function imageId(substr: string): Promise<string> {
+  const out = (await must(`docker images --no-trunc --format '{{.ID}} {{.Repository}}' | grep ${quote(substr)} | head -1`)).trim();
+  const id = out.split(/\s+/)[0] ?? "";
+  assert.ok(id.startsWith("sha256:") || id.length > 0, `no local image matched ${substr}:\n${out}`);
+  return id;
+}
+
+async function settled(withinMs = 600_000): Promise<void> {
+  const until = Date.now() + withinMs;
+  let last = "";
+  while (Date.now() < until) {
+    const asked = await meshTry(`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("model access refreshes on the manager node and delivers only the access token, never the refresh token", {
+  skip, timeout: 1_500_000,
+}, async () => {
+  const managerImage = pinned("mesh-runtime-anthropic-manager");
+  const consumerImage = pinned("mesh-runtime-anthropic-consumer");
+
+  // --- the licence, its manager, and the consumer holder ------------------------------------------
+  await mesh(`licence add anthropic personal --serves '{"model":"a-model"}'`);
+  await mesh(`licence manager personal ${MACHINE}`);
+  await mesh(`licence use personal ${MACHINE} anthropic-consumer`);
+
+  // --- both runtimes are placed so the host pulls their images (which the test then drives) --------
+  // Inline manifests, env pointed at the stub, mirroring the committed module.json. The scheduled
+  // containers install as present state (ADR 0053); the test drives the entrypoints directly for a
+  // deterministic flow rather than waiting on cron.
+  const managerManifest = JSON.stringify({
+    module: "anthropic-manager",
+    version: "1",
+    "own-secrets": { broker: "/var/lib/mesh/anthropic-manager/broker" },
+    emits: ["module.anthropic-manager.usage.read"],
+    resources: [
+      { id: "mesh-state", type: "directory", path: "/var/lib/mesh/anthropic-manager", mode: "0700" },
+      { id: "keys", type: "directory", path: "/var/lib/mesh/anthropic-manager/keys", mode: "0700" },
+      { id: "out", type: "directory", path: "/var/lib/mesh/anthropic-manager/out", mode: "0700" },
+      {
+        id: "refresh", type: "container", name: "mesh-anthropic-manager-refresh",
+        image: managerImage, network: "host", schedule: "*/9 * * * *",
+        args: ["run", "/app/modules/anthropic-manager/dist/refresh/index.js"],
+        volumes: ["/var/lib/mesh/anthropic-manager:/run/state"],
+        env: {
+          MESH_ANTHROPIC_LICENCE: "personal",
+          MESH_ANTHROPIC_TOKEN_ENDPOINT: "http://127.0.0.1:9099/token",
+          MESH_ANTHROPIC_USAGE_ENDPOINT: "http://127.0.0.1:9099/usage",
+          MESH_ANTHROPIC_GRANT_FILE: "/run/state/grant.json",
+          MESH_NODE_SEALING_PUBLIC_FILE: "/run/state/keys/sealing.pub",
+          MESH_NODE_SEALING_PRIVATE_FILE: "/run/state/keys/sealing.priv",
+          MESH_ANTHROPIC_ACCESS_OUT: "/run/state/out/access-token",
+          MESH_ANTHROPIC_GRANT_OUT: "/run/state/out/grant.json",
+          MESH_ANTHROPIC_USAGE_OUT: "/run/state/out/usage.json",
+        },
+      },
+    ],
+  });
+  const consumerManifest = JSON.stringify({
+    module: "anthropic-consumer",
+    version: "1",
+    requires: ["model-access"],
+    binds: { "model-access": "/var/lib/anthropic-consumer/model.json" },
+    secrets: { "model-access": "/var/lib/anthropic-consumer/access-token" },
+    "own-secrets": { broker: "/var/lib/mesh/anthropic-consumer/broker" },
+    emits: ["module.anthropic-consumer.usage.session"],
+    resources: [
+      { id: "mesh-state", type: "directory", path: "/var/lib/mesh/anthropic-consumer", mode: "0700" },
+      { id: "state", type: "directory", path: "/var/lib/anthropic-consumer", mode: "0700" },
+      { id: "claude-home", type: "directory", path: "/var/lib/anthropic-consumer/claude", mode: "0700" },
+      {
+        id: "apply", type: "container", name: "mesh-anthropic-consumer-apply",
+        image: consumerImage, network: "host", schedule: "*/9 * * * *",
+        args: ["run", "/app/modules/anthropic-consumer/dist/apply/index.js"],
+        volumes: ["/var/lib/anthropic-consumer:/run/state"],
+        env: {
+          MESH_MODEL_ACCESS_SECRET_FILE: "/run/state/access-token",
+          MESH_MODEL_ACCESS_BIND_FILE: "/run/state/model.json",
+          MESH_CLAUDE_CREDENTIALS_FILE: "/run/state/claude/.credentials.json",
+          MESH_CLAUDE_IDENTITY_FILE: "/run/state/claude/.claude.json",
+        },
+      },
+    ],
+  });
+
+  for (const [name, body] of [["anthropic-manager", managerManifest], ["anthropic-consumer", consumerManifest]] as const) {
+    await must(`printf %s ${quote(body)} > /tmp/${name}.json && docker cp /tmp/${name}.json mesh-control:/${name}.json`);
+    await mesh(`module add /${name}.json`);
+    await mesh(`module issue ${name} --node ${MACHINE}`);
+    await mesh(`assign ${MACHINE} ${name}`);
+  }
+  await mesh(`push ${MACHINE}`);
+  await settled();
+
+  // The images the host pulled to run the scheduled containers are now local; drive them directly.
+  const managerId = await imageId("anthropic-manager");
+  const consumerId = await imageId("anthropic-consumer");
+
+  // --- the stubbed node private key, mounted (FLAGGED) --------------------------------------------
+  // Production needs a host capability to place the node private key where the manager reads it;
+  // mesh-host has none today. Here the test mounts a generated key pair as that key.
+  const keys = nodeKeyPair();
+  await must(`printf %s ${quote(keys.pub)} > /var/lib/mesh/anthropic-manager/keys/sealing.pub`);
+  await must(`printf %s ${quote(keys.priv)} > /var/lib/mesh/anthropic-manager/keys/sealing.priv`);
+
+  // --- the OAuth stub: a tiny node server run from the manager image itself -----------------------
+  const stub = [
+    "const http=require('http');",
+    "http.createServer((req,res)=>{let b='';req.on('data',c=>b+=c);req.on('end',()=>{",
+    "  if(req.url.startsWith('/token')){res.setHeader('content-type','application/json');",
+    `    res.end(JSON.stringify({access_token:${JSON.stringify(ACCESS_TOKEN)},refresh_token:${JSON.stringify(ROTATED_REFRESH)},expires_in:3600,refresh_token_expires_in:2592000,subscription_type:'pro'}));return;}`,
+    "  if(req.url.startsWith('/usage')){res.setHeader('content-type','application/json');",
+    "    res.end(JSON.stringify({five_hour:{utilization:12,resets_at:'2026-01-01T00:00:00Z'},seven_day:{utilization:3}}));return;}",
+    "  res.statusCode=404;res.end('no');});}).listen(9099,'127.0.0.1',()=>console.log('stub up'));",
+  ].join("\n");
+  await must(`printf %s ${quote(stub)} > /var/lib/mesh/anthropic-manager/stub.js`);
+  await must(`docker rm -f oauth-stub 2>/dev/null; docker run -d --name oauth-stub --network host --entrypoint node -v /var/lib/mesh/anthropic-manager/stub.js:/run/stub.js:ro ${managerId} /run/stub.js`);
+  // Give it a moment to bind.
+  await must(`for i in $(seq 1 20); do curl -s -X POST http://127.0.0.1:9099/token >/dev/null && break; sleep 1; done`);
+
+  // --- 1. adopt: seal the refresh token at rest, on the manager node ------------------------------
+  await must(`printf %s ${quote(REFRESH_TOKEN)} > /var/lib/mesh/anthropic-manager/refresh-token`);
+  await must(
+    `docker run --rm --network host -v /var/lib/mesh/anthropic-manager:/run/state ` +
+      `-e MESH_ANTHROPIC_REFRESH_TOKEN_FILE=/run/state/refresh-token ` +
+      `-e MESH_NODE_SEALING_PUBLIC_FILE=/run/state/keys/sealing.pub ` +
+      `-e MESH_ANTHROPIC_GRANT_OUT=/run/state/grant.json ` +
+      `${managerId} run /app/modules/anthropic-manager/dist/adopt/index.js`,
+  );
+  const envelope = await must(`cat /var/lib/mesh/anthropic-manager/grant.json`);
+  assert.doesNotMatch(envelope, new RegExp(REFRESH_TOKEN),
+    `the adopted envelope holds the refresh token in the clear:\n${envelope}`);
+
+  // Store the sealed envelope in the control plane — which never sees the refresh token.
+  await must(`docker cp /var/lib/mesh/anthropic-manager/grant.json mesh-control:/grant.json`);
+  await mesh(`licence set-grant personal --file /grant.json`);
+
+  // --- 2. refresh: open on the manager node, call the stub, write access token + re-sealed refresh -
+  await must(
+    `docker run --rm --network host -v /var/lib/mesh/anthropic-manager:/run/state ` +
+      `-e MESH_ANTHROPIC_LICENCE=personal ` +
+      `-e MESH_ANTHROPIC_TOKEN_ENDPOINT=http://127.0.0.1:9099/token ` +
+      `-e MESH_ANTHROPIC_USAGE_ENDPOINT=http://127.0.0.1:9099/usage ` +
+      `-e MESH_ANTHROPIC_GRANT_FILE=/run/state/grant.json ` +
+      `-e MESH_NODE_SEALING_PUBLIC_FILE=/run/state/keys/sealing.pub ` +
+      `-e MESH_NODE_SEALING_PRIVATE_FILE=/run/state/keys/sealing.priv ` +
+      `-e MESH_ANTHROPIC_ACCESS_OUT=/run/state/out/access-token ` +
+      `-e MESH_ANTHROPIC_GRANT_OUT=/run/state/out/grant.json ` +
+      `-e MESH_ANTHROPIC_USAGE_OUT=/run/state/out/usage.json ` +
+      `${managerId} run /app/modules/anthropic-manager/dist/refresh/index.js`,
+  );
+  const producedAccess = (await must(`cat /var/lib/mesh/anthropic-manager/out/access-token`)).trim();
+  assert.equal(producedAccess, ACCESS_TOKEN, "the manager did not mint the stub's access token");
+  const newEnvelope = await must(`cat /var/lib/mesh/anthropic-manager/out/grant.json`);
+  assert.doesNotMatch(newEnvelope, new RegExp(ROTATED_REFRESH),
+    `the re-sealed envelope holds the rotated refresh token in the clear:\n${newEnvelope}`);
+  // Licence-grain usage was read and recorded.
+  const usage = await must(`cat /var/lib/mesh/anthropic-manager/out/usage.json`);
+  assert.match(usage, /"sessionPct":12/, `the licence-grain usage reading is wrong:\n${usage}`);
+
+  // --- 3. submit: the control plane is handed only the access token + opaque envelope -------------
+  await must(`docker cp /var/lib/mesh/anthropic-manager/out/access-token mesh-control:/access-token`);
+  await must(`docker cp /var/lib/mesh/anthropic-manager/out/grant.json mesh-control:/new-grant.json`);
+  const submitted = await mesh(`licence submit-refresh personal --access-file /access-token --grant-file /new-grant.json`);
+  assert.match(submitted, /sealed to 1 holder/, submitted);
+
+  // --- 4. deliver: the consumer gets the sealed access token and writes the credential -------------
+  await mesh(`push ${MACHINE}`);
+  await settled();
+
+  // Drive the consumer's apply once the token has been delivered to its secret path.
+  let delivered = false;
+  for (let i = 0; i < 20 && !delivered; i++) {
+    delivered = (await on(`test -s /var/lib/anthropic-consumer/access-token`)).ok;
+    if (!delivered) await new Promise((r) => setTimeout(r, 3000));
+  }
+  assert.ok(delivered, "the sealed access token was never delivered to the consumer's secret path");
+  await must(
+    `docker run --rm --network host -v /var/lib/anthropic-consumer:/run/state ` +
+      `-e MESH_MODEL_ACCESS_SECRET_FILE=/run/state/access-token ` +
+      `-e MESH_MODEL_ACCESS_BIND_FILE=/run/state/model.json ` +
+      `-e MESH_CLAUDE_CREDENTIALS_FILE=/run/state/claude/.credentials.json ` +
+      `-e MESH_CLAUDE_IDENTITY_FILE=/run/state/claude/.claude.json ` +
+      `${consumerId} run /app/modules/anthropic-consumer/dist/apply/index.js`,
+  );
+
+  // --- the invariant, asserted from every angle ---------------------------------------------------
+  const creds = await must(`cat /var/lib/anthropic-consumer/claude/.credentials.json`);
+  assert.match(creds, new RegExp(ACCESS_TOKEN), `the access token did not reach the credential file:\n${creds}`);
+  const parsed = JSON.parse(creds) as { claudeAiOauth?: { accessToken?: string; refreshToken?: string } };
+  assert.equal(parsed.claudeAiOauth?.accessToken, ACCESS_TOKEN);
+  assert.ok(!parsed.claudeAiOauth?.refreshToken, "the consumer was given a refresh token");
+
+  // The refresh token — original or rotated — is nowhere on the consuming node.
+  for (const secret of [REFRESH_TOKEN, ROTATED_REFRESH]) {
+    const found = await on(`grep -rq ${quote(secret)} /var/lib/anthropic-consumer`);
+    assert.ok(!found.ok, `a refresh token is on the consuming node under /var/lib/anthropic-consumer`);
+  }
+
+  // The control plane's own database holds the refresh token only as ciphertext.
+  const grantRow = await must(
+    `docker exec mesh-store psql -U postgres -d licences -qAt -c "select token, wrapped_key from refresh_grant where licence='personal'"`,
+  );
+  assert.ok(grantRow.trim().length > 0, "no refresh grant was stored");
+  for (const secret of [REFRESH_TOKEN, ROTATED_REFRESH]) {
+    assert.doesNotMatch(grantRow, new RegExp(secret),
+      `the refresh token is in the control plane's database in the clear:\n${grantRow}`);
+  }
+  // And the holder's sealed column carries the access token's seal, never a refresh token.
+  const holder = await must(
+    `docker exec mesh-store psql -U postgres -d licences -qAt -c "select coalesce(sealed,'') from licence_holder where licence='personal'"`,
+  );
+  assert.ok(holder.trim().length > 0, "nothing was sealed to the holder");
+  for (const secret of [REFRESH_TOKEN, ROTATED_REFRESH]) {
+    assert.doesNotMatch(holder, new RegExp(secret), "a refresh token is in the holder row");
+  }
+
+  await must(`docker rm -f oauth-stub 2>/dev/null || true`);
+});