diff --git a/modules/claude-code/README.md b/modules/claude-code/README.md
new file mode 100644
index 0000000..2575ad9
--- /dev/null
+++ b/modules/claude-code/README.md
@@ -0,0 +1,74 @@
+# claude-code
+
+The operator's agent on a machine (novox/hq design 36): its package, its machine-wide managed
+configuration, and the consumer side of the Anthropic licence manager (design 39, ADR 0183).
+
+## What it owns
+
+Two directories, declared, so the mesh refuses a second module owning either:
+
+- `/etc/claude-code`, the agent's machine-wide managed directory, root's, `0755`.
+- `~/.claude` under the operator account's home, the operator's, `0700`. The module owns the directory —
+  that it exists, who owns it, its mode — and of what is inside only what it writes. Everything else
+  in it (memory, history, projects, local settings, a person's own rules and skills) is the person's
+  and is never read or written (hq ADR 0182). Unassigned, the module leaves the directory: the host
+  removes a directory only when it is empty.
+
+## What it writes
+
+Under the agent's managed directory, `/etc/claude-code`, owned whole by this module and rewritten
+whenever the node's tool runtime collects the module's tools:
+
+| file | holds |
+|---|---|
+| `managed-mcp.json` | the tool servers every session loads: the mesh's console as `mesh`, and the servers set in this module's `mcp_servers` setting. **Exclusive**: a server not listed here does not load — not one added with `claude mcp add`, not a project's `.mcp.json`, not a plugin's |
+| `managed-settings.json` | the repositories' attribution convention, the claude.ai connectors kept beside the managed servers, and the key-helper while the node holds an API-key licence |
+| `CLAUDE.md` | how a session on this mesh works, this node's name and role, the conventions |
+
+Under the operator's home, only `~/.claude/.credentials.json`, and only when the licence manager hands
+this node a subscription token. Nothing else under the home is read or written.
+
+## Over NATS
+
+Everything between this module and the rest of the mesh is NATS, in three kinds: an **event** says that
+something happened and carries no secret, because a stream keeps it; a **request** carries a token,
+because nothing keeps it (hq design 32 §10); and **state** is the current value of something every node
+must see, a node that joins later included — kept, so it carries no secret either (hq ADR 0202).
+
+| what | how |
+|---|---|
+| the licence manager rotated a licence, or switched this node | its `licence.rotated` / `licence.switched` event; this module then asks `anthropic-licence-manager.current` for its token, sealed to the key it sends |
+| this node starts | it asks `current` once, so a node that was off catches up |
+| a person ran `/login` here | the credentials file gains a refresh token this module never writes; it asks `anthropic-licence-manager.adopt` at once with the grant sealed to the manager's key — the one time a refresh token travels, because the login made the manager's stale |
+| an MCP server registered through this module | a key in the module's `servers` state — `all.<server>` for every node, `<node>.<server>` for one; every node watches it and renders what applies to it, a node's own entry over the one for every node. A node that joins later, or was off, reads the whole current set at start; unregistering is a delete. An entry with a secret in its `env` or `headers` is refused by the runtime |
+
+## Tools
+
+`claude_code_status`, `claude_code_render`, `claude_code_pull`, `claude_code_mcp_list`,
+`claude_code_mcp_register` (this node by default; `nodes: "all"` or a list for more — called for this
+node alone, its answer names the other nodes running claude-code), `claude_code_mcp_unregister`.
+
+## Settings
+
+Per node or for the whole mesh, through `mesh-controller.settings module=claude-code`:
+
+- `role` — what this node is, in a few words; shown to every session.
+- `mcp_servers` — extra tool servers, set by the operator for the mesh or a node, beside the ones
+  registered through the tools; keyed by name, in the vendor's `.mcp.json` entry shape
+  (`{"type":"http","url":…}` or `{"type":"stdio","command":…,"args":[…]}`). The name `mesh` is the
+  module's own and cannot be set. Put a person's own servers here, or they stop loading.
+
+## On a machine that carried the predecessor
+
+Remove these by hand, once; the mesh removes nothing it did not make (ADR 0182):
+
+- `~/.claude/CLAUDE.md`
+- `~/.claude/rules/00-hal-mesh.md`, `~/.claude/rules/conventions.md`
+- `~/.claude/skills/cleanup/`, `~/.claude/skills/hal-switch-license/`
+- the hand-made console entry in `~/.claude.json` under `mcpServers` — it is ignored now anyway
+
+## Escalation
+
+Writing `/etc/claude-code` needs root. The runtime runs as the operator account, and the module uses
+that account's passwordless `sudo`; on a machine without it, `claude_code_render` says so and nothing
+is written.
diff --git a/modules/claude-code/grant.ts b/modules/claude-code/grant.ts
new file mode 100644
index 0000000..3b425d8
--- /dev/null
+++ b/modules/claude-code/grant.ts
@@ -0,0 +1,112 @@
+// The agent's credentials file, and whether an offered grant may replace what it holds (novox/hq
+// ADR 0183, design 36 §5). Pure where it decides, so the rules are tested without a file.
+//
+// The file is the vendor's: `{ claudeAiOauth: { accessToken, expiresAt, refreshTokenExpiresAt?,
+// scopes?, subscriptionType?, rateLimitTier? }, ... }`. A node never holds a refresh token, so the
+// one this module writes never carries one, and a full grant a login left behind is stripped the
+// moment the manager hands the node its own.
+//
+// The lineage rule is the predecessor's, with the incidents that earned it: a rotation of the same
+// licence is applied only if newer; a grant re-issued by a login is adopted whatever its expiry; a
+// switch to another licence is applied regardless, because across licences the expiries are
+// unrelated numbers.
+
+import { readFileSync, renameSync, writeFileSync, mkdirSync } from "node:fs";
+import { dirname } from "node:path";
+
+export interface Grant {
+  readonly accessToken: string;
+  readonly expiresAt: number;
+  readonly refreshTokenExpiresAt?: number | null;
+  readonly scopes?: readonly string[] | null;
+  readonly subscriptionType?: string | null;
+  readonly rateLimitTier?: string | null;
+}
+
+export type ApplySource = "rotation" | "switch";
+
+export type ApplyDecision =
+  | { apply: true; reissued?: boolean }
+  | { apply: false; reason: "already-current" }
+  | { apply: false; reason: "not-newer"; localExpiresAt: number };
+
+/** Two refresh-token expiries within a day are one lineage; a login starts a fresh window weeks away. */
+export const GENERATION_TOLERANCE_MS = 24 * 60 * 60 * 1000;
+
+export function sameGeneration(a?: number | null, b?: number | null): boolean {
+  if (a == null || b == null) return true;
+  return Math.abs(Number(a) - Number(b)) <= GENERATION_TOLERANCE_MS;
+}
+
+export function decideApply(local: Grant | null | undefined, offered: Grant, source: ApplySource): ApplyDecision {
+  if (!local?.accessToken) return { apply: true };
+  if (local.accessToken === offered.accessToken) return { apply: false, reason: "already-current" };
+  const reissued = !sameGeneration(local.refreshTokenExpiresAt, offered.refreshTokenExpiresAt);
+  if (source === "rotation" && !reissued && Number(local.expiresAt) >= Number(offered.expiresAt)) {
+    return { apply: false, reason: "not-newer", localExpiresAt: Number(local.expiresAt) };
+  }
+  return reissued ? { apply: true, reissued: true } : { apply: true };
+}
+
+type Oauth = Record<string, unknown> & { accessToken?: string; refreshToken?: string; expiresAt?: number };
+type Credentials = Record<string, unknown> & { claudeAiOauth?: Oauth };
+
+export function readCredentials(path: string): Credentials | null {
+  try {
+    const parsed = JSON.parse(readFileSync(path, "utf8")) as Credentials;
+    return parsed && typeof parsed === "object" ? parsed : null;
+  } catch {
+    return null;
+  }
+}
+
+/** The grant the file holds, or null. */
+export function grantOf(creds: Credentials | null): Grant | null {
+  const o = creds?.claudeAiOauth;
+  if (!o?.accessToken) return null;
+  return {
+    accessToken: o.accessToken,
+    expiresAt: Number(o.expiresAt ?? 0),
+    refreshTokenExpiresAt: o.refreshTokenExpiresAt == null ? null : Number(o.refreshTokenExpiresAt),
+  };
+}
+
+/** Does the file hold a full grant — a refresh token this module never writes, so a person's login? */
+export function holdsLogin(creds: Credentials | null): boolean {
+  return typeof creds?.claudeAiOauth?.refreshToken === "string" && creds.claudeAiOauth.refreshToken.length > 0;
+}
+
+/**
+ * The handed grant laid over what is there — a rotation of the licence the node already holds — or,
+ * for a switch, in place of it: the old licence's grant goes whole, scopes and subscription included,
+ * and only keys outside the grant (another kind of credential the vendor keeps in the file) stay.
+ * Either way, no refresh token survives.
+ */
+export function replacedBy(local: Credentials | null, grant: Grant): Credentials {
+  const next: Credentials = { ...(local ?? {}) };
+  delete next.claudeAiOauth;
+  return withGrant(next, grant);
+}
+
+/** Overlay the handed grant on what is there, and delete any refresh token. */
+export function withGrant(local: Credentials | null, grant: Grant): Credentials {
+  const next: Credentials = { ...(local ?? {}) };
+  const oauth: Oauth = { ...(local?.claudeAiOauth ?? {}) };
+  oauth.accessToken = grant.accessToken;
+  oauth.expiresAt = grant.expiresAt;
+  for (const k of ["refreshTokenExpiresAt", "scopes", "subscriptionType", "rateLimitTier"] as const) {
+    const v = grant[k];
+    if (v != null) oauth[k] = v as unknown;
+  }
+  delete oauth.refreshToken;
+  next.claudeAiOauth = oauth;
+  return next;
+}
+
+/** Write atomically at 0600: a partial credentials file must never be read as a whole one. */
+export function writeCredentials(path: string, creds: Credentials): void {
+  mkdirSync(dirname(path), { recursive: true, mode: 0o700 });
+  const tmp = `${path}.mesh-tmp`;
+  writeFileSync(tmp, JSON.stringify(creds, null, 2) + "\n", { mode: 0o600 });
+  renameSync(tmp, path);
+}
diff --git a/modules/claude-code/identity.ts b/modules/claude-code/identity.ts
new file mode 100644
index 0000000..aa526a9
--- /dev/null
+++ b/modules/claude-code/identity.ts
@@ -0,0 +1,50 @@
+// Which account the agent is logged in as (novox/hq ADR 0183): not in the token, but in the agent's
+// own state file beside the home, `~/.claude.json` → `oauthAccount`. Read to attribute a login; written,
+// three keys and nothing else, when a licence is switched, so the file Claude Code shows the account from
+// names the account whose token it now holds (as the predecessor learned: two files that disagree make
+// a later login look like the wrong account).
+
+import { readFileSync, renameSync, writeFileSync } from "node:fs";
+
+export interface Identity {
+  readonly accountUuid: string;
+  readonly emailAddress?: string;
+  readonly organizationUuid?: string;
+}
+
+export function readIdentity(stateFile: string): Identity | null {
+  try {
+    const raw = JSON.parse(readFileSync(stateFile, "utf8")) as { oauthAccount?: Record<string, unknown> };
+    const a = raw.oauthAccount;
+    if (!a || typeof a.accountUuid !== "string") return null;
+    return {
+      accountUuid: a.accountUuid,
+      emailAddress: typeof a.emailAddress === "string" ? a.emailAddress : undefined,
+      organizationUuid: typeof a.organizationUuid === "string" ? a.organizationUuid : undefined,
+    };
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Point the state file's account at `id`, keeping every other key as found. Returns whether the file
+ * changed; a file that cannot be read as an object is left alone rather than replaced.
+ */
+export function writeIdentity(stateFile: string, id: Identity): boolean {
+  let raw: Record<string, unknown>;
+  try {
+    raw = JSON.parse(readFileSync(stateFile, "utf8")) as Record<string, unknown>;
+    if (!raw || typeof raw !== "object") return false;
+  } catch {
+    raw = {};
+  }
+  const current = (raw.oauthAccount ?? {}) as Record<string, unknown>;
+  if (current.accountUuid === id.accountUuid && current.emailAddress === id.emailAddress
+      && current.organizationUuid === id.organizationUuid) return false;
+  raw.oauthAccount = { ...current, accountUuid: id.accountUuid, emailAddress: id.emailAddress, organizationUuid: id.organizationUuid };
+  const tmp = `${stateFile}.mesh-tmp`;
+  writeFileSync(tmp, JSON.stringify(raw, null, 2), { mode: 0o600 });
+  renameSync(tmp, stateFile);
+  return true;
+}
diff --git a/modules/claude-code/module.json b/modules/claude-code/module.json
new file mode 100644
index 0000000..841e009
--- /dev/null
+++ b/modules/claude-code/module.json
@@ -0,0 +1,90 @@
+{
+  "module": "claude-code",
+  "version": "1",
+  "slug": "agent",
+  "capabilities": [
+    "package-manager"
+  ],
+  "requires": [
+    "mcp-endpoint"
+  ],
+  "binds": {
+    "mcp-endpoint": "${dir:state}/mcp-endpoint.json"
+  },
+  "consumes": [
+    "claude-licence-manager.licence.rotated",
+    "claude-licence-manager.licence.switched"
+  ],
+  "state": [
+    "servers"
+  ],
+  "tools": [
+    "claude_code_status",
+    "claude_code_render",
+    "claude_code_pull",
+    "claude_code_mcp_list",
+    "claude_code_mcp_register",
+    "claude_code_mcp_unregister"
+  ],
+  "resources": [
+    {
+      "id": "package",
+      "type": "package",
+      "package": "claude-code"
+    },
+    {
+      "id": "managed",
+      "type": "directory",
+      "path": "/etc/claude-code",
+      "mode": "0755"
+    },
+    {
+      "id": "agent-home",
+      "type": "directory",
+      "path": "${machine:account-home}/.claude",
+      "mode": "0700",
+      "owner": "${machine:account}"
+    },
+    {
+      "id": "state",
+      "type": "directory",
+      "mode": "0700",
+      "owner": "${machine:account}",
+      "place": "."
+    },
+    {
+      "id": "facts",
+      "type": "file",
+      "path": "${dir:state}/facts.json",
+      "mode": "0600",
+      "owner": "${machine:account}",
+      "content": "{\n  \"node\": \"${machine:name}\",\n  \"console\": \"http://127.0.0.1:${bound:mcp-endpoint:port}/mcp\"\n}\n"
+    },
+    {
+      "id": "settings",
+      "type": "file",
+      "path": "${dir:state}/settings.json",
+      "mode": "0600",
+      "owner": "${machine:account}",
+      "merge": "json",
+      "content": "{\n  \"role\": \"\",\n  \"mcp_servers\": {}\n}\n"
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools",
+        "kind": "bundle",
+        "language": "typescript",
+        "entrypoints": [
+          "tools/index.js"
+        ],
+        "env": {
+          "MESH_CLAUDE_CODE_STATE": "${dir:state}",
+          "MESH_CLAUDE_CODE_FACTS": "${dir:state}/facts.json",
+          "MESH_CLAUDE_CODE_SETTINGS": "${dir:state}/settings.json"
+        }
+      }
+    ]
+  }
+}
diff --git a/modules/claude-code/node.ts b/modules/claude-code/node.ts
new file mode 100644
index 0000000..af22d7f
--- /dev/null
+++ b/modules/claude-code/node.ts
@@ -0,0 +1,271 @@
+// What claude-code does on a node, written against two things it is handed — a way to ask a tool on the
+// bus and a way to emit an event — so every path is tested without a bus (novox/hq design 36 §4–§5,
+// ADR 0183, ADR 0198).
+//
+// **Over NATS, in two kinds** (design 32 §10): an event says that something happened and carries no
+// secret, because a stream keeps it; a token travels on a request, which nothing keeps. So:
+//   - the licence manager's `licence.rotated` and `licence.switched` events tell this module to ask the
+//     seat for its current token, sealed to the key it sends with the request;
+//   - a login a person made here — a refresh token this module never writes — is offered to the seat at
+//     once, sealed to the seat's key: the one moment a refresh token travels, because the login made the
+//     manager's stale;
+//   - an MCP server registered through this module is **state, not an event** (novox/hq ADR 0202): one
+//     key per server in the module's `servers` bucket — `all.<server>` for every node, `<node>.<server>`
+//     for one — which every node watches. A node that joins later, or was off, reads the whole current set
+//     at start; unregistering is a delete. A secret never goes in an entry: the runtime refuses one.
+
+import { chmodSync, existsSync, readFileSync, rmSync, writeFileSync } from "node:fs";
+import { join } from "node:path";
+
+import { render, entryProblem, MANAGED_DIR, type Binding, type Facts, type Settings, type Servers } from "./render.js";
+import { generateKeyPair, open, seal, type SealedBox } from "./seal.js";
+import { decideApply, grantOf, holdsLogin, readCredentials, replacedBy, withGrant, writeCredentials, type Grant } from "./grant.js";
+import { readIdentity, writeIdentity, type Identity } from "./identity.js";
+
+export const SEAT = "anthropic-licence-manager";
+
+export interface Paths {
+  state: string;
+  facts: string;
+  settings: string;
+  home: string;
+  node: string;
+}
+
+/** A tool on the bus: its address and arguments in, its JSON answer out. */
+export type Ask = (address: string, args: Record<string, unknown>) => Promise<unknown>;
+/** An event of this module's, by its local name. */
+export type Emit = (type: string, body: unknown) => Promise<void>;
+/** Write one managed file; answers what happened. */
+export type WriteManaged = (name: string, content: string) => string;
+
+export const readJson = <T>(p: string, fallback: T): T => {
+  try {
+    return JSON.parse(readFileSync(p, "utf8")) as T;
+  } catch {
+    return fallback;
+  }
+};
+
+const credentialsPath = (p: Paths) => join(p.home, ".claude", ".credentials.json");
+const accountPath = (p: Paths) => join(p.home, ".claude.json");
+const bindingPath = (p: Paths) => join(p.state, "licence.json");
+const apiKeyPath = (p: Paths) => join(p.state, "api-key");
+export const helperPath = (p: Paths) => join(p.state, "api-key-helper");
+const keyPath = (p: Paths) => join(p.state, "key.pem");
+const pubPath = (p: Paths) => join(p.state, "key.pub.pem");
+const registryPath = (p: Paths) => join(p.state, "mcp-servers.json");
+
+export function keypair(p: Paths): { publicKey: string; privateKey: string } {
+  if (!existsSync(keyPath(p))) {
+    const k = generateKeyPair();
+    writeFileSync(keyPath(p), k.privateKey, { mode: 0o600 });
+    writeFileSync(pubPath(p), k.publicKey, { mode: 0o644 });
+  }
+  return { privateKey: readFileSync(keyPath(p), "utf8"), publicKey: readFileSync(pubPath(p), "utf8") };
+}
+
+export function registered(p: Paths): Servers {
+  return readJson<Servers>(registryPath(p), {});
+}
+
+export function renderNow(p: Paths, write: WriteManaged): string[] {
+  const facts = readJson<Facts | null>(p.facts, null);
+  if (!facts?.console) throw new Error(`the mesh has not rendered ${p.facts} yet; nothing to write`);
+  const files = render(facts, readJson<Settings>(p.settings, {}), readJson<Binding | null>(bindingPath(p), null),
+    helperPath(p), registered(p));
+  return Object.entries(files).map(([name, content]) => write(name, content));
+}
+
+// ---- the licence ----------------------------------------------------------------------------------
+
+/** What the seat answers to `current`: the licence this node is bound to and its token, sealed. */
+export interface Current {
+  licence: string;
+  kind: "subscription" | "api-key";
+  sealed: SealedBox;
+  identity?: Identity | null;
+}
+
+/** Ask the seat for this node's current token and apply it. */
+export async function pull(p: Paths, ask: Ask, write: WriteManaged): Promise<Record<string, unknown>> {
+  const answer = (await ask(`${SEAT}.current`, { node: p.node, public_key: keypair(p).publicKey })) as Current | null;
+  if (!answer?.sealed) return { applied: false, reason: "the seat holds no licence for this node" };
+  return apply(p, answer, write);
+}
+
+/** Apply what the seat handed over. A switch replaces the grant whole and cleans up after the old licence. */
+export function apply(p: Paths, handed: Current, write: WriteManaged): Record<string, unknown> {
+  const plain = open(handed.sealed, keypair(p).privateKey);
+  const previous = readJson<Binding | null>(bindingPath(p), null);
+  const switched = previous?.licence !== handed.licence;
+  let outcome: Record<string, unknown> = { applied: true, licence: handed.licence, kind: handed.kind, switched };
+  if (handed.kind === "api-key") {
+    writeFileSync(apiKeyPath(p), plain.trim() + "\n", { mode: 0o600 });
+    writeFileSync(helperPath(p), `#!/bin/sh\nexec cat '${apiKeyPath(p)}'\n`, { mode: 0o700 });
+    chmodSync(helperPath(p), 0o700);
+  } else {
+    const grant = JSON.parse(plain) as Grant;
+    const local = readCredentials(credentialsPath(p));
+    const d = decideApply(grantOf(local), grant, switched ? "switch" : "rotation");
+    if (d.apply) writeCredentials(credentialsPath(p), switched ? replacedBy(local, grant) : withGrant(local, grant));
+    else outcome = { applied: false, licence: handed.licence, reason: "reason" in d ? d.reason : undefined }; // narrowed by hand: the build compiles without strict
+    // Away from the API key: it goes, with its helper.
+    rmSync(apiKeyPath(p), { force: true });
+    rmSync(helperPath(p), { force: true });
+  }
+  if (switched && handed.identity?.accountUuid) {
+    outcome.account = writeIdentity(accountPath(p), handed.identity) ? "updated" : "unchanged";
+  }
+  writeFileSync(bindingPath(p), JSON.stringify({ licence: handed.licence, kind: handed.kind }) + "\n", { mode: 0o600 });
+  try {
+    outcome.rendered = renderNow(p, write); // the key-helper comes or goes with the licence's kind
+  } catch (err) {
+    outcome.rendered = { failed: err instanceof Error ? err.message : String(err) };
+  }
+  return outcome;
+}
+
+/** A licence event from the manager: is it for this node? */
+export function concerns(p: Paths, type: string, body: { licence?: string; node?: string }): boolean {
+  if (type.endsWith("licence.switched")) return body.node === p.node;
+  if (type.endsWith("licence.rotated")) return body.licence === readJson<Binding | null>(bindingPath(p), null)?.licence;
+  return false;
+}
+
+/** A refresh token in the credentials file is a login: this module never writes one. Offer it to the seat. */
+export async function offerLogin(p: Paths, ask: Ask): Promise<Record<string, unknown> | null> {
+  const creds = readCredentials(credentialsPath(p));
+  if (!holdsLogin(creds)) return null;
+  const key = (await ask(`${SEAT}.public_key`, {})) as { public_key?: string } | null;
+  if (!key?.public_key) throw new Error("the licence manager did not say what key to seal a login to");
+  return (await ask(`${SEAT}.adopt`, {
+    node: p.node,
+    identity: readIdentity(accountPath(p)),
+    sealed: seal(JSON.stringify(creds!.claudeAiOauth), key.public_key),
+  })) as Record<string, unknown>;
+}
+
+// ---- MCP servers ----------------------------------------------------------------------------------
+
+export interface Registration {
+  name: string;
+  entry?: Record<string, unknown>;
+  /** Which nodes: this one (absent), every node running the module ("all"), or a list. */
+  nodes?: "all" | string[];
+}
+
+/** The `servers` state, as this module reaches it through the runtime (`state("servers")` in the SDK). */
+export interface ServerState {
+  put(key: string, value: Record<string, unknown>): Promise<number>;
+  delete(key: string): Promise<void>;
+  keys(): Promise<string[]>;
+}
+
+/** One change to the `servers` state, as a watch hands it over. */
+export interface ServerChange {
+  key: string;
+  op: "put" | "delete";
+  value?: Record<string, unknown>;
+}
+
+/** The key a registration lives at: `all.<server>` for every node, `<node>.<server>` for one. */
+export const keyOf = (scope: string, name: string) => `${scope}.${name}`;
+
+/**
+ * What this node takes from the `servers` state: the entries for every node and for this one, by key —
+ * kept in memory from the watch, and written through to the module's own file whenever what applies here
+ * changes, so the managed directory can be rendered without the bus.
+ */
+export class ServerView {
+  private readonly entries = new Map<string, Record<string, unknown>>();
+  constructor(private readonly p: Paths) {}
+
+  /** Take one change; answers whether what applies to this node changed. */
+  take(c: ServerChange): boolean {
+    const dot = c.key.indexOf(".");
+    const scope = c.key.slice(0, dot), name = c.key.slice(dot + 1);
+    if (dot <= 0 || (scope !== "all" && scope !== this.p.node)) return false;
+    if (c.op === "put" && c.value && entryProblem(name, c.value) === null) this.entries.set(c.key, c.value);
+    else this.entries.delete(c.key);
+    return this.writeThrough();
+  }
+
+  /** What applies here: every node's entries, with this node's own laid over them by server name. */
+  effective(): Servers {
+    const out: Record<string, Record<string, unknown>> = {};
+    for (const scope of ["all", this.p.node]) {
+      for (const [key, entry] of [...this.entries].sort(([a], [b]) => a.localeCompare(b))) {
+        if (key.startsWith(scope + ".")) out[key.slice(scope.length + 1)] = entry;
+      }
+    }
+    return out;
+  }
+
+  private writeThrough(): boolean {
+    const now = JSON.stringify(this.effective(), null, 2) + "\n";
+    let before = "";
+    try {
+      before = readFileSync(registryPath(this.p), "utf8");
+    } catch {
+      /* none yet */
+    }
+    if (now === before) return false;
+    writeFileSync(registryPath(this.p), now, { mode: 0o600 });
+    return true;
+  }
+}
+
+/** A change from the watch: take it, and render when what applies here changed. */
+export function onServerChange(view: ServerView, c: ServerChange, p: Paths, write: WriteManaged): string | null {
+  if (!view.take(c)) return null;
+  renderNow(p, write);
+  return `${c.op === "put" ? "registered" : "unregistered"} ${c.key}`;
+}
+
+const scopesOf = (p: Paths, nodes: Registration["nodes"]): string[] =>
+  nodes === undefined ? [p.node] : nodes === "all" ? ["all"] : nodes;
+
+/**
+ * Register (or with no entry, unregister) a server: a put (or delete) per scope in the `servers` state.
+ * Taken into this node's view at once, so the answer says what it did here; every other node takes it
+ * from its watch, and a node that joins later from the current state.
+ */
+export async function registerServer(p: Paths, r: Registration, servers: ServerState, view: ServerView,
+                                     write: WriteManaged, others: () => Promise<string[]>): Promise<Record<string, unknown>> {
+  if (r.entry) {
+    const problem = entryProblem(r.name, r.entry);
+    if (problem) return { registered: false, reason: problem };
+  }
+  const scopes = scopesOf(p, r.nodes);
+  // Compared before and after rather than read from take(): this node's own watch may hand the view the
+  // same change first, and then take() here finds nothing new although this call made it.
+  const before = JSON.stringify(view.effective());
+  for (const scope of scopes) {
+    const key = keyOf(scope, r.name);
+    if (r.entry) await servers.put(key, r.entry);
+    else await servers.delete(key);
+    view.take({ key, op: r.entry ? "put" : "delete", value: r.entry });
+  }
+  const changedHere = JSON.stringify(view.effective()) !== before;
+  const here = scopes.includes("all") || scopes.includes(p.node);
+  const answer: Record<string, unknown> = {
+    [r.entry ? "registered" : "unregistered"]: r.name,
+    on: r.nodes === undefined ? [p.node] : r.nodes,
+    here: here ? (changedHere ? "changed" : "already so") : "not this node",
+    rendered: changedHere ? renderNow(p, write) : [],
+  };
+  if (!r.entry && view.effective()[r.name]) {
+    answer.still = `${r.name} still applies here from another registration (for every node, or for this one); unregister that too`;
+  }
+  if (r.nodes === undefined) {
+    // The question the operator wanted asked: here only, or more?
+    const elsewhere = (await others().catch(() => [] as string[])).filter((n) => n !== p.node);
+    answer.also = elsewhere.length
+      ? `claude-code also runs on ${elsewhere.join(", ")}. To ${r.entry ? "register" : "unregister"} it there too, call again with nodes: "all" or a list of those nodes.`
+      : `To do the same on every node running claude-code, call again with nodes: "all".`;
+  }
+  return answer;
+}
+
+export { MANAGED_DIR };
diff --git a/modules/claude-code/package.json b/modules/claude-code/package.json
new file mode 100644
index 0000000..fc05060
--- /dev/null
+++ b/modules/claude-code/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "@novox/module-claude-code",
+  "version": "0.1.0",
+  "description": "claude-code — the operator's agent on a machine: its managed configuration, and the consumer side of the Anthropic licence manager (novox/hq design 36).",
+  "type": "module",
+  "private": true,
+  "scripts": {
+    "build": "tsc seal.ts grant.ts identity.ts render.ts node.ts tools/index.ts --module NodeNext --moduleResolution NodeNext --target ES2022 --rootDir . --outDir dist",
+    "test": "npm run build && node --test --experimental-strip-types 'test/*.test.ts'"
+  },
+  "dependencies": {
+    "@novox/mesh-sdk": "^0.1.7"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "typescript": "^5.6.0"
+  }
+}
diff --git a/modules/claude-code/render.ts b/modules/claude-code/render.ts
new file mode 100644
index 0000000..bdc361b
--- /dev/null
+++ b/modules/claude-code/render.ts
@@ -0,0 +1,135 @@
+// What the module writes into the agent's machine-wide managed directory (novox/hq design 36 §1–§4).
+// Pure: composed from the facts the mesh rendered, the settings the operator set and the licence the
+// node holds, so what lands under /etc is tested without a machine.
+//
+// Three files, owned whole by this module:
+//   managed-mcp.json        the tool servers every session loads: the mesh's console as `mesh`, and the
+//                           servers the operator declared for the mesh or this node. Exclusive by the
+//                           vendor's rule — a server not listed here does not load — which is why the
+//                           list is the module's settings and nothing else (operator's choice, 2026-10-03).
+//   managed-settings.json   the mesh's keys only: the repositories' attribution convention, the
+//                           claude.ai connectors kept beside the managed servers, and — for an API-key
+//                           licence only — the key-helper. A person's preferences are theirs.
+//   CLAUDE.md               how a session on this mesh works, who this node is, the conventions.
+
+export const MANAGED_DIR = "/etc/claude-code";
+
+export interface Facts {
+  readonly node: string;
+  readonly console: string;
+}
+
+export interface Settings {
+  readonly role?: string;
+  /** Extra tool servers, in the vendor's `.mcp.json` entry shape, keyed by name. */
+  readonly mcp_servers?: Readonly<Record<string, Record<string, unknown>>>;
+}
+
+export interface Binding {
+  readonly licence: string;
+  readonly kind: "subscription" | "api-key";
+}
+
+export interface Rendered {
+  readonly [file: string]: string;
+}
+
+const MESH_ENTRY = "mesh";
+
+export type Servers = Readonly<Record<string, Record<string, unknown>>>;
+
+/** Whether an entry is one the vendor's managed file takes: a name of letters, digits, `-` and `_`, and
+ *  an http/sse server with a url or a stdio server with a command. Returns why not, or null. */
+export function entryProblem(name: string, entry: Record<string, unknown>): string | null {
+  if (!/^[A-Za-z0-9_-]+$/.test(name)) return `"${name}" is not a name the agent takes: letters, digits, - and _`;
+  if (name === MESH_ENTRY) return `"${MESH_ENTRY}" is the mesh's own entry`;
+  const type = entry?.type ?? "stdio";
+  if (type === "http" || type === "sse" || type === "streamable-http") {
+    return typeof entry.url === "string" && entry.url ? null : `an ${type} server needs a url`;
+  }
+  if (type === "stdio") return typeof entry.command === "string" && entry.command ? null : "a stdio server needs a command";
+  return `"${String(type)}" is not a server type the agent knows (http, sse, stdio)`;
+}
+
+/**
+ * Compose the three files. `registered` is the module's own list on this node — what was registered
+ * through its tools — laid over the servers the operator set in its settings.
+ */
+export function render(facts: Facts, settings: Settings, binding: Binding | null, helperPath: string,
+                       registered: Servers = {}): Rendered {
+  const servers: Record<string, unknown> = {};
+  for (const [name, entry] of Object.entries({ ...(settings.mcp_servers ?? {}), ...registered })) {
+    if (entryProblem(name, entry) !== null) continue; // the mesh's own entry, or one the agent would refuse
+    servers[name] = entry;
+  }
+  servers[MESH_ENTRY] = { type: "http", url: facts.console };
+
+  const managed: Record<string, unknown> = {
+    attribution: { commit: "", pr: "" },
+    allowAllClaudeAiMcps: true,
+  };
+  if (binding?.kind === "api-key") managed.apiKeyHelper = helperPath;
+
+  return {
+    "managed-mcp.json": json({ mcpServers: sortKeys(servers) }),
+    "managed-settings.json": json(managed),
+    "CLAUDE.md": instructions(facts, settings),
+  };
+}
+
+function json(v: unknown): string {
+  return JSON.stringify(v, null, 2) + "\n";
+}
+
+function sortKeys(o: Record<string, unknown>): Record<string, unknown> {
+  return Object.fromEntries(Object.keys(o).sort().map((k) => [k, o[k]]));
+}
+
+export function instructions(facts: Facts, settings: Settings): string {
+  const role = settings.role?.trim() ? settings.role.trim() : "not stated — set it in this module's settings for the node";
+  return `# This machine is a node of a Novox mesh
+
+Written by the mesh's \`claude-code\` module. Edit the module's settings or the catalogue, never this file:
+it is rewritten whenever the module renders.
+
+## Who this node is
+
+- **Node:** \`${facts.node}\`
+- **Role:** ${role}
+- The other nodes, their roles and what runs where: ask the controller (\`mesh-controller.nodes\`,
+  \`mesh-controller.node\`). Nothing here lists them, because a copy drifts.
+
+## How a session on this mesh works
+
+The console is the only way to the mesh: the MCP server named \`mesh\`. It offers five tools, and
+everything else is an address you find and call through them:
+
+- \`mesh_search\` — words in, matching addresses out. \`mesh_describe\` — one address's arguments.
+- \`mesh_call\` — call an address. A seat the mesh holds once is \`<seat>.<verb>\` (the mesh's own verbs
+  are \`mesh-controller.<verb>\`: \`status\`, \`plan\`, \`node\`, \`assign\`, \`push\`, \`settings\`);
+  a module on a machine is \`<node>/<module>.<tool>\`.
+- \`mesh_overview\` and \`mesh_machine\` — the mesh's seats and machines, and what one machine runs.
+
+- **Symptom first.** For an error, a failing service or anything unexpected, search the record with the
+  literal text before forming a hypothesis: the records module's \`records_search\`, then
+  \`records_read\`.
+- **Ask the mesh before changing it**, and change it through the controller's verbs or the catalogue.
+- **A licence** through the \`anthropic-licence-manager\` seat's verbs. Never edit the agent's credentials
+  file by hand, never print or ask for a token.
+
+## Hard rules
+
+- A file the mesh manages is changed through the verb or the catalogue that owns it, never on disk. If
+  unsure, \`mesh-controller.plan\` for the node says what the mesh writes there.
+- Never write to a store's database by hand; schema changes are numbered migrations.
+- Never push to a main branch: a branch, a pull request, and a human approval for every merge.
+- The mesh creates no symlinks, and nobody else does either.
+- A package is declared in a module, never installed by hand.
+
+## Conventions
+
+- Commit messages are concise, in the imperative, about why.
+- Test before pushing: nodes update unattended.
+- The playbooks in the record say how research, decisions, designs, issues and hand-offs are done.
+`;
+}
diff --git a/modules/claude-code/seal.ts b/modules/claude-code/seal.ts
new file mode 100644
index 0000000..8c467c0
--- /dev/null
+++ b/modules/claude-code/seal.ts
@@ -0,0 +1,77 @@
+// Sealing a token to one recipient (novox/hq ADR 0183): the manager seals what it hands a node to that
+// node's agent module key, and a node seals a waiting login to the key the manager names. X25519 for
+// the agreement, HKDF-SHA256 for the key, AES-256-GCM for the box — all from Node's own library, so a
+// bundle carries no dependency and no secret ever crosses the bus in the clear.
+//
+// A sealed box is `{ v: 1, eph, iv, tag, ct }`, every field base64. `eph` is a one-time public key, so
+// two boxes of one value to one recipient share nothing, and only the recipient's private key opens it.
+
+import {
+  createCipheriv, createDecipheriv, createPrivateKey, createPublicKey, diffieHellman,
+  generateKeyPairSync, hkdfSync, randomBytes, type KeyObject,
+} from "node:crypto";
+
+export interface SealedBox {
+  readonly v: 1;
+  readonly eph: string;
+  readonly iv: string;
+  readonly tag: string;
+  readonly ct: string;
+}
+
+/** A recipient's keypair, as the two PEM strings it is kept and published as. */
+export interface KeyPairPem {
+  readonly publicKey: string;
+  readonly privateKey: string;
+}
+
+const INFO = Buffer.from("novox-mesh sealed box v1");
+
+export function generateKeyPair(): KeyPairPem {
+  const { publicKey, privateKey } = generateKeyPairSync("x25519");
+  return {
+    publicKey: publicKey.export({ type: "spki", format: "pem" }).toString(),
+    privateKey: privateKey.export({ type: "pkcs8", format: "pem" }).toString(),
+  };
+}
+
+function keyFor(secret: Buffer, eph: Buffer, recipient: Buffer): Buffer {
+  // The ephemeral and the recipient's public halves are bound into the key, so a box cannot be
+  // re-addressed to another recipient by swapping its `eph`.
+  return Buffer.from(hkdfSync("sha256", secret, Buffer.concat([eph, recipient]), INFO, 32));
+}
+
+function rawPublic(key: KeyObject): Buffer {
+  return key.export({ type: "spki", format: "der" }).subarray(-32);
+}
+
+export function seal(plaintext: string, recipientPublicPem: string): SealedBox {
+  const recipient = createPublicKey(recipientPublicPem);
+  const eph = generateKeyPairSync("x25519");
+  const secret = diffieHellman({ privateKey: eph.privateKey, publicKey: recipient });
+  const ephRaw = eph.publicKey.export({ type: "spki", format: "der" });
+  const key = keyFor(secret, ephRaw, rawPublic(recipient));
+  const iv = randomBytes(12);
+  const cipher = createCipheriv("aes-256-gcm", key, iv);
+  const ct = Buffer.concat([cipher.update(plaintext, "utf8"), cipher.final()]);
+  return {
+    v: 1,
+    eph: ephRaw.toString("base64"),
+    iv: iv.toString("base64"),
+    tag: cipher.getAuthTag().toString("base64"),
+    ct: ct.toString("base64"),
+  };
+}
+
+/** Open a box with the recipient's private key. Throws on a box for another key or one tampered with. */
+export function open(box: SealedBox, privateKeyPem: string): string {
+  if (!box || box.v !== 1) throw new Error("not a sealed box this module can open");
+  const priv = createPrivateKey(privateKeyPem);
+  const ephRaw = Buffer.from(box.eph, "base64");
+  const eph = createPublicKey({ key: ephRaw, format: "der", type: "spki" });
+  const secret = diffieHellman({ privateKey: priv, publicKey: eph });
+  const key = keyFor(secret, ephRaw, rawPublic(createPublicKey(priv)));
+  const decipher = createDecipheriv("aes-256-gcm", key, Buffer.from(box.iv, "base64"));
+  decipher.setAuthTag(Buffer.from(box.tag, "base64"));
+  return Buffer.concat([decipher.update(Buffer.from(box.ct, "base64")), decipher.final()]).toString("utf8");
+}
diff --git a/modules/claude-code/test/grant.test.ts b/modules/claude-code/test/grant.test.ts
new file mode 100644
index 0000000..1b10895
--- /dev/null
+++ b/modules/claude-code/test/grant.test.ts
@@ -0,0 +1,54 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { mkdtempSync, readFileSync, statSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import {
+  decideApply, grantOf, holdsLogin, readCredentials, withGrant, writeCredentials, type Grant,
+} from "../dist/grant.js";
+
+const NOW = 1_700_000_000_000;
+const HOUR = 3_600_000;
+const g = (over: Partial<Grant> = {}): Grant => ({
+  accessToken: "tok-A", expiresAt: NOW + HOUR, refreshTokenExpiresAt: NOW + 30 * 24 * HOUR, ...over,
+});
+
+test("a rotation applies a newer grant of the same licence", () => {
+  assert.deepEqual(decideApply(g(), g({ accessToken: "tok-B", expiresAt: NOW + 2 * HOUR }), "rotation"), { apply: true });
+});
+
+test("a rotation refuses a grant that arrived late and is older", () => {
+  const d = decideApply(g({ accessToken: "new", expiresAt: NOW + 2 * HOUR }), g({ accessToken: "old" }), "rotation");
+  assert.equal(d.apply === false && d.reason, "not-newer");
+});
+
+test("a grant re-issued by a login is adopted even though it expires sooner (2026-09-05)", () => {
+  const local = g({ expiresAt: NOW + 8 * HOUR, refreshTokenExpiresAt: NOW + 30 * 24 * HOUR });
+  const offered = g({ accessToken: "reissued", expiresAt: NOW + HOUR, refreshTokenExpiresAt: NOW + 5 * 24 * HOUR });
+  assert.deepEqual(decideApply(local, offered, "rotation"), { apply: true, reissued: true });
+});
+
+test("a switch to another licence applies whatever the expiries say", () => {
+  const local = g({ expiresAt: NOW + 8 * HOUR });
+  assert.equal(decideApply(local, g({ accessToken: "other", expiresAt: NOW + HOUR }), "switch").apply, true);
+});
+
+test("the same token is not rewritten", () => {
+  assert.deepEqual(decideApply(g(), g(), "switch"), { apply: false, reason: "already-current" });
+});
+
+test("a full grant left by a login is seen as a login, and stripped when the node's own is written", () => {
+  const dir = mkdtempSync(join(tmpdir(), "claude-code-"));
+  const path = join(dir, ".claude", ".credentials.json");
+  writeFileSync(join(dir, "x"), "");
+  const login = { claudeAiOauth: { accessToken: "at-login", refreshToken: "rt-login", expiresAt: NOW }, other: 1 };
+  assert.equal(holdsLogin(login), true);
+  writeCredentials(path, withGrant(login, g({ accessToken: "at-mesh", scopes: ["user:inference"] })));
+  const back = readCredentials(path)!;
+  assert.equal(holdsLogin(back), false);
+  assert.equal(grantOf(back)!.accessToken, "at-mesh");
+  assert.deepEqual(back.claudeAiOauth!.scopes, ["user:inference"]);
+  assert.equal(back.other, 1, "a key the module does not know was lost");
+  assert.ok(!readFileSync(path, "utf8").includes("rt-login"));
+  assert.equal(statSync(path).mode & 0o777, 0o600);
+});
diff --git a/modules/claude-code/test/identity.test.ts b/modules/claude-code/test/identity.test.ts
new file mode 100644
index 0000000..31f8c6b
--- /dev/null
+++ b/modules/claude-code/test/identity.test.ts
@@ -0,0 +1,19 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { mkdtempSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { readIdentity } from "../dist/identity.js";
+
+test("the account is read from the agent's state file", () => {
+  const p = join(mkdtempSync(join(tmpdir(), "cc-id-")), ".claude.json");
+  writeFileSync(p, JSON.stringify({ oauthAccount: { accountUuid: "u-1", emailAddress: "a@example.org" }, other: 2 }));
+  assert.deepEqual(readIdentity(p), { accountUuid: "u-1", emailAddress: "a@example.org", organizationUuid: undefined });
+});
+
+test("no state file, or no account in it, is no identity rather than a guess", () => {
+  assert.equal(readIdentity("/nonexistent/.claude.json"), null);
+  const p = join(mkdtempSync(join(tmpdir(), "cc-id-")), ".claude.json");
+  writeFileSync(p, "{}");
+  assert.equal(readIdentity(p), null);
+});
diff --git a/modules/claude-code/test/node.test.ts b/modules/claude-code/test/node.test.ts
new file mode 100644
index 0000000..d7cd92d
--- /dev/null
+++ b/modules/claude-code/test/node.test.ts
@@ -0,0 +1,173 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { existsSync, mkdirSync, mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import {
+  apply, concerns, keypair, offerLogin, onServerChange, pull, registerServer, registered, ServerView, type Paths,
+  type ServerChange, type ServerState,
+} from "../dist/node.js";
+import { generateKeyPair, open, seal } from "../dist/seal.js";
+
+const NOW = Date.now();
+function node(name = "laptop"): { p: Paths; written: Record<string, string> } {
+  const root = mkdtempSync(join(tmpdir(), "cc-node-"));
+  const p = { state: join(root, "state"), facts: join(root, "state", "facts.json"), settings: join(root, "state", "settings.json"), home: join(root, "home"), node: name };
+  mkdirSync(p.state, { recursive: true });
+  mkdirSync(join(p.home, ".claude"), { recursive: true });
+  writeFileSync(p.facts, JSON.stringify({ node: name, console: "http://127.0.0.1:4270/mcp" }));
+  writeFileSync(p.settings, JSON.stringify({ role: "", mcp_servers: {} }));
+  return { p, written: {} };
+}
+const writer = (w: Record<string, string>) => (name: string, content: string) => { w[name] = content; return `${name}: written`; };
+const creds = (p: Paths) => JSON.parse(readFileSync(join(p.home, ".claude", ".credentials.json"), "utf8"));
+const grantFor = (p: Paths, licence: string, token: string, kind: "subscription" | "api-key" = "subscription", identity?: object) => ({
+  licence, kind, identity,
+  sealed: seal(kind === "api-key" ? token : JSON.stringify({ accessToken: token, expiresAt: NOW + 3_600_000, refreshTokenExpiresAt: NOW + 86_400_000, subscriptionType: licence }), keypair(p).publicKey),
+});
+
+test("a pull asks the seat with this node's key and applies what it answers", async () => {
+  const { p, written } = node();
+  let asked: [string, Record<string, unknown>] | null = null;
+  const r = await pull(p, async (address, args) => { asked = [address, args]; return grantFor(p, "personal", "at-1"); }, writer(written));
+  assert.equal(asked![0], "anthropic-licence-manager.current");
+  assert.equal(asked![1].node, "laptop");
+  assert.match(String(asked![1].public_key), /BEGIN PUBLIC KEY/);
+  assert.equal(r.applied, true);
+  assert.equal(creds(p).claudeAiOauth.accessToken, "at-1");
+  assert.ok(written["managed-mcp.json"]);
+});
+
+test("a switch replaces the old licence's grant whole and points the account at the new one", () => {
+  const { p, written } = node();
+  writeFileSync(join(p.home, ".claude.json"), JSON.stringify({ oauthAccount: { accountUuid: "old" }, projects: { keep: 1 } }));
+  apply(p, grantFor(p, "personal", "at-1"), writer(written));
+  const r = apply(p, grantFor(p, "work", "at-2", "subscription", { accountUuid: "new", emailAddress: "w@example.org" }), writer(written));
+  assert.equal(r.switched, true);
+  assert.equal(creds(p).claudeAiOauth.accessToken, "at-2");
+  assert.equal(creds(p).claudeAiOauth.subscriptionType, "work", "the old licence's subscription type survived the switch");
+  const account = JSON.parse(readFileSync(join(p.home, ".claude.json"), "utf8"));
+  assert.equal(account.oauthAccount.accountUuid, "new");
+  assert.deepEqual(account.projects, { keep: 1 });
+});
+
+test("switching to the API key adds the key-helper; switching away removes the key and the helper", () => {
+  const { p, written } = node();
+  apply(p, grantFor(p, "api", "sk-key", "api-key"), writer(written));
+  assert.ok(JSON.parse(written["managed-settings.json"]).apiKeyHelper);
+  assert.ok(existsSync(join(p.state, "api-key")));
+  apply(p, grantFor(p, "personal", "at-1"), writer(written));
+  assert.ok(!("apiKeyHelper" in JSON.parse(written["managed-settings.json"])));
+  assert.ok(!existsSync(join(p.state, "api-key")) && !existsSync(join(p.state, "api-key-helper")));
+});
+
+test("a rotation event concerns the node bound to that licence; a switch event the node it names", () => {
+  const { p, written } = node();
+  apply(p, grantFor(p, "personal", "at-1"), writer(written));
+  assert.equal(concerns(p, "claude-licence-manager.licence.rotated", { licence: "personal" }), true);
+  assert.equal(concerns(p, "claude-licence-manager.licence.rotated", { licence: "work" }), false);
+  assert.equal(concerns(p, "claude-licence-manager.licence.switched", { node: "laptop", licence: "work" }), true);
+  assert.equal(concerns(p, "claude-licence-manager.licence.switched", { node: "server" }), false);
+});
+
+test("a login is offered to the seat sealed to the seat's key, with the account it belongs to", async () => {
+  const { p } = node();
+  const manager = generateKeyPair();
+  writeFileSync(join(p.home, ".claude", ".credentials.json"), JSON.stringify({ claudeAiOauth: { accessToken: "at-login", refreshToken: "rt-login", expiresAt: NOW } }));
+  writeFileSync(join(p.home, ".claude.json"), JSON.stringify({ oauthAccount: { accountUuid: "u-9" } }));
+  const calls: [string, Record<string, unknown>][] = [];
+  await offerLogin(p, async (address, args) => { calls.push([address, args]); return address.endsWith("public_key") ? { public_key: manager.publicKey } : { adopted: true }; });
+  assert.deepEqual(calls.map((c) => c[0]), ["anthropic-licence-manager.public_key", "anthropic-licence-manager.adopt"]);
+  const adopt = calls[1][1] as { identity: { accountUuid: string }; sealed: never };
+  assert.equal(adopt.identity.accountUuid, "u-9");
+  assert.equal(JSON.parse(open(adopt.sealed, manager.privateKey)).refreshToken, "rt-login");
+  assert.ok(!JSON.stringify(adopt).includes("rt-login"), "the refresh token crossed in the clear");
+});
+
+test("no refresh token in the file is no login, and nothing is asked", async () => {
+  const { p } = node();
+  writeFileSync(join(p.home, ".claude", ".credentials.json"), JSON.stringify({ claudeAiOauth: { accessToken: "at", expiresAt: NOW } }));
+  assert.equal(await offerLogin(p, async () => { throw new Error("asked"); }), null);
+});
+
+/** The `servers` state as the bus holds it, shared by every node in a test, with each node's watch. */
+function bus() {
+  const kept = new Map<string, Record<string, unknown>>();
+  const watchers: ((c: ServerChange) => void)[] = [];
+  const state: ServerState = {
+    put: async (key, value) => { kept.set(key, value); watchers.forEach((w) => w({ key, op: "put", value })); return kept.size; },
+    delete: async (key) => { kept.delete(key); watchers.forEach((w) => w({ key, op: "delete" })); },
+    keys: async () => [...kept.keys()].sort(),
+  };
+  /** A node joining: its view takes the current state, then every change. */
+  const join = (n: { p: Paths; written: Record<string, string> }) => {
+    const view = new ServerView(n.p);
+    for (const [key, value] of kept) onServerChange(view, { key, op: "put", value }, n.p, writer(n.written));
+    watchers.push((c) => onServerChange(view, c, n.p, writer(n.written)));
+    return view;
+  };
+  return { state, join, kept };
+}
+
+test("registering a server here puts it under this node's key, renders it, and asks about the other nodes", async () => {
+  const n = node();
+  const b = bus();
+  const view = b.join(n);
+  const r = await registerServer(n.p, { name: "search", entry: { type: "http", url: "https://s.example/mcp" } },
+    b.state, view, writer(n.written), async () => ["laptop", "server", "desktop"]);
+  assert.equal(r.here, "changed");
+  assert.match(String(r.also), /server, desktop/);
+  assert.deepEqual([...b.kept.keys()], ["laptop.search"]);
+  assert.ok(JSON.parse(n.written["managed-mcp.json"]).mcpServers.search);
+});
+
+test("registering for every node reaches the others through their watch, and a node joining later reads it", async () => {
+  const a = node("laptop"), s = node("server");
+  const b = bus();
+  const va = b.join(a);
+  b.join(s);
+  await registerServer(a.p, { name: "docs", entry: { type: "stdio", command: "docs-mcp" }, nodes: "all" },
+    b.state, va, writer(a.written), async () => []);
+  assert.deepEqual([...b.kept.keys()], ["all.docs"]);
+  assert.deepEqual(registered(s.p).docs, { type: "stdio", command: "docs-mcp" });
+  assert.ok(JSON.parse(s.written["managed-mcp.json"]).mcpServers.docs);
+  // The gap events left: a node assigned after the registration takes the whole current set at start.
+  const late = node("desktop");
+  b.join(late);
+  assert.deepEqual(registered(late.p).docs, { type: "stdio", command: "docs-mcp" });
+  // Unregistering is a delete, and every node's view drops it.
+  await registerServer(a.p, { name: "docs", nodes: "all" }, b.state, va, writer(a.written), async () => []);
+  assert.equal(registered(s.p).docs, undefined);
+  assert.equal(registered(late.p).docs, undefined);
+});
+
+test("a node's own registration overrides the one for every node; other nodes' keys leave this one alone", async () => {
+  const a = node("laptop"), s = node("server");
+  const b = bus();
+  const va = b.join(a);
+  const vs = b.join(s);
+  await registerServer(a.p, { name: "x", entry: { type: "http", url: "https://all" }, nodes: "all" }, b.state, va, writer(a.written), async () => []);
+  await registerServer(a.p, { name: "x", entry: { type: "http", url: "https://laptop" } }, b.state, va, writer(a.written), async () => []);
+  assert.equal(registered(a.p).x.url, "https://laptop");
+  assert.equal(registered(s.p).x.url, "https://all");
+  await registerServer(a.p, { name: "only", entry: { type: "http", url: "https://o" }, nodes: ["server"] }, b.state, va, writer(a.written), async () => []);
+  assert.equal(registered(a.p).only, undefined);
+  assert.equal(registered(s.p).only.url, "https://o");
+  // Unregistering here leaves the every-node one applying, and says so.
+  const r = await registerServer(a.p, { name: "x" }, b.state, va, writer(a.written), async () => []);
+  assert.match(String(r.still), /still applies here/);
+  assert.equal(registered(a.p).x.url, "https://all");
+  assert.equal(vs.effective().x.url, "https://all");
+});
+
+test("a bad entry is refused before anything is put; a repeated change changes nothing", async () => {
+  const n = node();
+  const b = bus();
+  const view = b.join(n);
+  const r = await registerServer(n.p, { name: "mesh", entry: { type: "http", url: "https://x" } }, b.state, view, writer(n.written), async () => []);
+  assert.equal(r.registered, false);
+  assert.equal(b.kept.size, 0);
+  assert.equal(onServerChange(view, { key: "all.a", op: "put", value: { type: "http", url: "https://a" } }, n.p, writer(n.written)), "registered all.a");
+  assert.equal(onServerChange(view, { key: "all.a", op: "put", value: { type: "http", url: "https://a" } }, n.p, writer(n.written)), null);
+  assert.equal(onServerChange(view, { key: "server.b", op: "put", value: { type: "http", url: "https://b" } }, n.p, writer(n.written)), null);
+});
diff --git a/modules/claude-code/test/render.test.ts b/modules/claude-code/test/render.test.ts
new file mode 100644
index 0000000..2efeb59
--- /dev/null
+++ b/modules/claude-code/test/render.test.ts
@@ -0,0 +1,40 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { render } from "../dist/render.js";
+
+const facts = { node: "workstation", console: "http://127.0.0.1:4270/mcp" };
+
+test("the console is the `mesh` server, and an operator's servers are listed beside it", () => {
+  const out = render(facts, { mcp_servers: { search: { type: "http", url: "https://s.example/mcp" } } }, null, "/h");
+  const mcp = JSON.parse(out["managed-mcp.json"]);
+  assert.deepEqual(Object.keys(mcp.mcpServers), ["mesh", "search"]);
+  assert.deepEqual(mcp.mcpServers.mesh, { type: "http", url: facts.console });
+});
+
+test("a setting cannot replace the mesh's own entry, and a name the vendor refuses is left out", () => {
+  const out = render(facts, { mcp_servers: { mesh: { type: "http", url: "http://evil" }, "bad name": {} } }, null, "/h");
+  const mcp = JSON.parse(out["managed-mcp.json"]);
+  assert.equal(mcp.mcpServers.mesh.url, facts.console);
+  assert.ok(!("bad name" in mcp.mcpServers));
+});
+
+test("managed settings carry the mesh's keys only, and the key-helper only for an API-key licence", () => {
+  const sub = JSON.parse(render(facts, {}, { licence: "personal", kind: "subscription" }, "/h")["managed-settings.json"]);
+  assert.deepEqual(sub, { attribution: { commit: "", pr: "" }, allowAllClaudeAiMcps: true });
+  const key = JSON.parse(render(facts, {}, { licence: "api", kind: "api-key" }, "/state/api-key-helper")["managed-settings.json"]);
+  assert.equal(key.apiKeyHelper, "/state/api-key-helper");
+  assert.ok(!("model" in key), "a preference is the person's");
+});
+
+test("the instruction file names the node and its role, and no other node", () => {
+  const md = render(facts, { role: "the laptop" }, null, "/h")["CLAUDE.md"];
+  assert.match(md, /\*\*Node:\*\* `workstation`/);
+  assert.match(md, /\*\*Role:\*\* the laptop/);
+  assert.match(md, /mesh_call/);
+  assert.match(md, /records_search/);
+});
+
+test("rendering is deterministic, so an unchanged input writes nothing", () => {
+  const s = { mcp_servers: { b: { type: "http", url: "https://b" }, a: { type: "http", url: "https://a" } } };
+  assert.deepEqual(render(facts, s, null, "/h"), render(facts, s, null, "/h"));
+});
diff --git a/modules/claude-code/test/seal.test.ts b/modules/claude-code/test/seal.test.ts
new file mode 100644
index 0000000..9685d4e
--- /dev/null
+++ b/modules/claude-code/test/seal.test.ts
@@ -0,0 +1,31 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { generateKeyPair, open, seal } from "../dist/seal.js";
+
+test("a box opens with its recipient's key and yields the value", () => {
+  const k = generateKeyPair();
+  assert.equal(open(seal("at-secret", k.publicKey), k.privateKey), "at-secret");
+});
+
+test("a box sealed for one node does not open with another node's key", () => {
+  const a = generateKeyPair();
+  const b = generateKeyPair();
+  assert.throws(() => open(seal("at-secret", a.publicKey), b.privateKey));
+});
+
+test("a tampered box is refused, not opened to garbage", () => {
+  const k = generateKeyPair();
+  const box = seal("at-secret", k.publicKey);
+  const ct = Buffer.from(box.ct, "base64");
+  ct[0] ^= 0xff;
+  assert.throws(() => open({ ...box, ct: ct.toString("base64") }, k.privateKey));
+});
+
+test("two boxes of one value share nothing a reader could compare", () => {
+  const k = generateKeyPair();
+  const x = seal("at-secret", k.publicKey);
+  const y = seal("at-secret", k.publicKey);
+  assert.notEqual(x.ct, y.ct);
+  assert.notEqual(x.eph, y.eph);
+  assert.ok(!JSON.stringify(x).includes("at-secret"));
+});
diff --git a/modules/claude-code/tools/index.ts b/modules/claude-code/tools/index.ts
new file mode 100644
index 0000000..af4bffb
--- /dev/null
+++ b/modules/claude-code/tools/index.ts
@@ -0,0 +1,208 @@
+// claude-code's bundle (novox/hq design 36, ADR 0183). The node's runtime launches it over stdio, as the
+// operator account (ADR 0193), and is its bus (ADR 0198): it asks tools, emits and consumes through the
+// runtime. It is given its state directory and two files the mesh renders into it (ADR 0192), beside the
+// runtime's own words. **stdout is the MCP channel**: everything this module says, it says on stderr.
+//
+// At start it renders the agent's managed directory, asks the licence manager for this node's token,
+// begins watching the credentials file for a login, takes the manager's licence events, and watches the
+// module's `servers` state — every node's MCP server registrations (novox/hq ADR 0202). node.ts holds the
+// logic.
+
+import { readFileSync, watchFile } from "node:fs";
+import { spawnSync } from "node:child_process";
+import { join } from "node:path";
+import { registerModuleTools, type ToolDefinition } from "@novox/mesh-sdk/tools";
+import { broker } from "@novox/mesh-sdk/messaging";
+import { on } from "@novox/mesh-sdk/events";
+import { state } from "@novox/mesh-sdk/state";
+
+import {
+  MANAGED_DIR, SEAT, ServerView, concerns, keypair, offerLogin, onServerChange, pull, readJson, registerServer,
+  registered, renderNow, type Ask, type Paths, type Registration, type ServerChange, type ServerState, type WriteManaged,
+} from "../node.js";
+import { grantOf, holdsLogin, readCredentials } from "../grant.js";
+import { createHash } from "node:crypto";
+
+const say = (line: string) => console.error(`[claude-code] ${line}`);
+const fingerprint = (s: string) => "sha256:" + createHash("sha256").update(s).digest("hex").slice(0, 16);
+
+function pathsFrom(env: NodeJS.ProcessEnv): Paths | null {
+  const state = env.MESH_CLAUDE_CODE_STATE, facts = env.MESH_CLAUDE_CODE_FACTS;
+  const settings = env.MESH_CLAUDE_CODE_SETTINGS, home = env.MESH_OPERATOR_HOME, node = env.MESH_NODE;
+  if (!state || !facts || !settings || !home || !node) return null;
+  return { state, facts, settings, home, node };
+}
+
+/** Write one managed file as root, only when its content changed. */
+const writeManaged: WriteManaged = (name, content) => {
+  const path = join(MANAGED_DIR, name);
+  try {
+    if (readFileSync(path, "utf8") === content) return `${name}: unchanged`;
+  } catch {
+    /* absent */
+  }
+  const asRoot = process.getuid?.() === 0;
+  const cmd = asRoot ? ["install", "-D", "-m", "0644", "/dev/stdin", path] : ["sudo", "-n", "install", "-D", "-m", "0644", "/dev/stdin", path];
+  const r = spawnSync(cmd[0], cmd.slice(1), { input: content, encoding: "utf8" });
+  if (r.status !== 0) {
+    throw new Error(`${name}: could not be written to ${MANAGED_DIR} (${(r.stderr || r.error?.message || "").trim()}); ` +
+      `the module writes there through the operator account's passwordless sudo`);
+  }
+  return `${name}: written`;
+};
+
+/** A tool on the bus, through the runtime; its MCP answer read back as JSON where it is JSON. */
+const ask: Ask = async (address, args) => {
+  const answer = (await broker().request<Record<string, unknown>, { content?: { text?: string }[]; isError?: boolean }>(address, args)) ?? {};
+  const text = answer.content?.map((c) => c.text ?? "").join("") ?? "";
+  if (answer.isError) throw new Error(`${address}: ${text}`);
+  try {
+    return JSON.parse(text);
+  } catch {
+    return text;
+  }
+};
+
+/** The nodes claude-code runs on, from the controller's list of modules — for the register tool's question. */
+async function nodesRunningMe(): Promise<string[]> {
+  const out = await ask("mesh-controller.modules", {});
+  const text = typeof out === "string" ? out : String((out as { output?: string })?.output ?? "");
+  const line = text.split("\n").find((l) => /^claude-code\s/.test(l)) ?? "";
+  const on = line.split(" on ")[1] ?? "";
+  return on.trim() === "nothing" ? [] : on.split(",").map((s) => s.trim()).filter(Boolean);
+}
+
+function status(p: Paths): Record<string, unknown> {
+  const creds = readCredentials(join(p.home, ".claude", ".credentials.json"));
+  const grant = grantOf(creds);
+  const managed = ["managed-mcp.json", "managed-settings.json", "CLAUDE.md"].map((f) => {
+    try {
+      return { file: join(MANAGED_DIR, f), fingerprint: fingerprint(readFileSync(join(MANAGED_DIR, f), "utf8")) };
+    } catch {
+      return { file: join(MANAGED_DIR, f), fingerprint: null };
+    }
+  });
+  return {
+    node: p.node,
+    licence: readJson(join(p.state, "licence.json"), null),
+    token: grant ? { fingerprint: fingerprint(grant.accessToken), expiresAt: new Date(grant.expiresAt).toISOString(),
+      loginWaiting: holdsLogin(creds) } : null,
+    managed,
+    registered: Object.keys(registered(p)),
+  };
+}
+
+/** The module's MCP servers on the bus (ADR 0202): its own state, which every node of it watches. */
+const servers = () => state<Record<string, unknown>>("servers") as unknown as ServerState;
+
+/** What this node takes from that state, kept from the watch. One per process. */
+let view: ServerView | null = null;
+const viewOf = (p: Paths) => (view ??= new ServerView(p));
+
+function tools(p: Paths): ToolDefinition[] {
+  const nodesArg = { type: "string", description: 'more nodes: "all" for every node running claude-code, or a comma-separated list; absent is this node only' };
+  const nodesOf = (v: unknown): Registration["nodes"] =>
+    v === undefined || v === "" ? undefined : v === "all" ? "all" : String(v).split(",").map((s) => s.trim()).filter(Boolean);
+  return [
+    {
+      name: "claude_code_status",
+      description: "Claude Code on this machine as the mesh configured it: the licence it holds and when its token expires, the managed files, the MCP servers registered here. Fingerprints only, never a token.",
+      input: {},
+      run: async () => status(p),
+    },
+    {
+      name: "claude_code_render",
+      description: "Write Claude Code's managed directory now, from the mesh's facts, this module's settings and the servers registered here.",
+      input: {},
+      run: async () => ({ rendered: renderNow(p, writeManaged) }),
+    },
+    {
+      name: "claude_code_pull",
+      description: "Ask the licence manager for this node's current token now and apply it, rather than waiting for its next event.",
+      input: {},
+      run: async () => pull(p, ask, writeManaged),
+    },
+    {
+      name: "claude_code_mcp_list",
+      description: "The MCP servers registered through this module: those that apply on this node (beside the console, `mesh`, and those set in the module's settings), and every registration on the mesh, by key — `all.<server>` for every node, `<node>.<server>` for one.",
+      input: {},
+      run: async () => ({ here: registered(p), everywhere: await servers().keys() }),
+    },
+    {
+      name: "claude_code_mcp_register",
+      description: "Register an MCP server with Claude Code on this node, every node, or a list — an http/sse server by url, or a stdio server by command. Kept on the bus, so a node that joins later takes it too. Never put a secret in env or headers: the mesh refuses one.",
+      input: {
+        name: { type: "string", description: "the server's name: letters, digits, - and _" },
+        type: { type: "string", description: "http, sse or stdio (default stdio when a command is given, http when a url is)" },
+        url: { type: "string", description: "an http or sse server's url" },
+        command: { type: "string", description: "a stdio server's program" },
+        args: { type: "array", description: "a stdio server's arguments" },
+        env: { type: "object", description: "a stdio server's environment" },
+        headers: { type: "object", description: "an http server's headers" },
+        nodes: nodesArg,
+      },
+      run: async (a) => {
+        const entry: Record<string, unknown> = { type: a.type ?? (a.url ? "http" : "stdio") };
+        for (const k of ["url", "command", "args", "env", "headers"]) if (a[k] !== undefined) entry[k] = a[k];
+        return registerServer(p, { name: String(a.name ?? ""), entry, nodes: nodesOf(a.nodes) }, servers(), viewOf(p), writeManaged, nodesRunningMe);
+      },
+    },
+    {
+      name: "claude_code_mcp_unregister",
+      description: "Remove an MCP server registered through this module, on this node or more.",
+      input: { name: { type: "string", description: "the server's name" }, nodes: nodesArg },
+      run: async (a) => registerServer(p, { name: String(a.name ?? ""), nodes: nodesOf(a.nodes) }, servers(), viewOf(p), writeManaged, nodesRunningMe),
+    },
+  ];
+}
+
+registerModuleTools("claude-code", (env) => {
+  const p = pathsFrom(env);
+  if (!p) return [];
+  try {
+    keypair(p);
+    for (const line of renderNow(p, writeManaged)) if (!line.endsWith("unchanged")) say(line);
+  } catch (err) {
+    say(err instanceof Error ? err.message : String(err));
+  }
+  return tools(p);
+});
+
+// Launched by the runtime: the bus is there from the first line (ADR 0198). Outside it — a test, a
+// build — nothing below runs.
+const p = process.env.MESH_SERVED_MODULE ? pathsFrom(process.env) : null;
+if (p) {
+  const loud = (what: string) => (err: unknown) => say(`${what}: ${err instanceof Error ? err.message : String(err)}`);
+
+  void on<{ licence?: string; node?: string }>("claude-licence-manager.licence.*", async (event) => {
+    if (!concerns(p, event.type, event.body ?? {})) return;
+    say(`${event.type} — asking ${SEAT} for this node's token`);
+    say(JSON.stringify(await pull(p, ask, writeManaged).catch((e) => ({ failed: String(e) }))));
+  }).catch(loud("the licence events"));
+
+  // Every node's MCP servers: the whole current set first, then each change (ADR 0202). Awaited, so the
+  // managed directory holds every server that applies here before the bundle says what it serves.
+  try {
+    await state<Record<string, unknown>>("servers").watch((c) => {
+      try {
+        const done = onServerChange(viewOf(p), c as ServerChange, p, writeManaged);
+        if (done) say(done);
+      } catch (err) {
+        loud(`taking ${c.op} ${c.key}`)(err); // the view took it; the next render writes it
+      }
+    });
+  } catch (err) {
+    loud("watching the MCP servers")(err);
+  }
+
+  // Catch up once at start: a node that was off takes its current token now.
+  void pull(p, ask, writeManaged).then((r) => say(`at start: ${JSON.stringify(r)}`), loud("asking for this node's token at start"));
+
+  // A login: a refresh token appears in the credentials file. Polled, because the file is replaced by
+  // rename and a watch on the old inode would go quiet.
+  const credentials = join(p.home, ".claude", ".credentials.json");
+  watchFile(credentials, { interval: 5000 }, () => {
+    void offerLogin(p, ask).then((r) => { if (r) say(`a login here was offered to ${SEAT}: ${JSON.stringify(r)}`); },
+      loud("offering a login to the licence manager"));
+  });
+}
diff --git a/modules/claude-code/tsconfig.json b/modules/claude-code/tsconfig.json
new file mode 100644
index 0000000..8e1f1bb
--- /dev/null
+++ b/modules/claude-code/tsconfig.json
@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "noEmit": true
+  },
+  "include": ["seal.ts", "grant.ts", "identity.ts", "render.ts", "node.ts", "tools/index.ts"]
+}