feat(cli): --version, status, doctor commands (v0.1.3)

Three Tier-2 polish commands for debugging + discoverability:

- claudemesh --version / -v: print CLI version (baked from
  package.json at build time via Bun JSON import).
- claudemesh status: WS-probe each joined mesh's broker, report
  reachability per mesh. Exit 1 if any broker unreachable.
- claudemesh doctor: run 6 preconditions — Node>=20, claude on PATH,
  MCP registered, hooks registered, config file parses + chmod 0600,
  mesh keypairs validate. Each check has a pass/fail + fix hint.
  Exit 0 if all pass.

Help text now leads with version (\"claudemesh v0.1.3 —\").

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/cli/src/commands/status.ts

@@ -0,0 +1,103 @@
+/**
+ * `claudemesh status` — one-shot health report.
+ *
+ * Reports CLI version, config path + permissions, each joined mesh
+ * with broker reachability (WS handshake probe). Exit 0 if every
+ * mesh's broker is reachable, 1 otherwise.
+ */
+
+import { statSync, existsSync } from "node:fs";
+import WebSocket from "ws";
+import { loadConfig, getConfigPath } from "../state/config";
+import { VERSION } from "../version";
+
+interface MeshStatus {
+  slug: string;
+  brokerUrl: string;
+  pubkey: string;
+  reachable: boolean;
+  error?: string;
+}
+
+async function probeBroker(url: string, timeoutMs = 4000): Promise<{ ok: boolean; error?: string }> {
+  return new Promise((resolve) => {
+    const ws = new WebSocket(url);
+    const timer = setTimeout(() => {
+      try { ws.terminate(); } catch { /* noop */ }
+      resolve({ ok: false, error: "timeout" });
+    }, timeoutMs);
+    ws.on("open", () => {
+      clearTimeout(timer);
+      try { ws.close(); } catch { /* noop */ }
+      resolve({ ok: true });
+    });
+    ws.on("error", (err) => {
+      clearTimeout(timer);
+      resolve({ ok: false, error: err.message });
+    });
+  });
+}
+
+export async function runStatus(): Promise<void> {
+  const useColor =
+    !process.env.NO_COLOR && process.env.TERM !== "dumb" && process.stdout.isTTY;
+  const dim = (s: string): string => (useColor ? `\x1b[2m${s}\x1b[22m` : s);
+  const green = (s: string): string => (useColor ? `\x1b[32m${s}\x1b[39m` : s);
+  const red = (s: string): string => (useColor ? `\x1b[31m${s}\x1b[39m` : s);
+
+  console.log(`claudemesh status  (v${VERSION})`);
+  console.log("─".repeat(60));
+
+  const configPath = getConfigPath();
+  let configPerms = "missing";
+  if (existsSync(configPath)) {
+    const st = statSync(configPath);
+    const mode = (st.mode & 0o777).toString(8).padStart(4, "0");
+    configPerms = mode === "0600" ? `${mode} ✓` : `${mode} ⚠ (expected 0600)`;
+  }
+  console.log(`Config:     ${configPath} (${configPerms})`);
+
+  const config = loadConfig();
+  if (config.meshes.length === 0) {
+    console.log("");
+    console.log(dim("No meshes joined. Run `claudemesh join <invite-url>` to get started."));
+    process.exit(0);
+  }
+
+  console.log("");
+  console.log(`Meshes (${config.meshes.length}):`);
+
+  const results: MeshStatus[] = [];
+  for (const m of config.meshes) {
+    process.stdout.write(`  ${m.slug.padEnd(20)} probing ${m.brokerUrl}… `);
+    const probe = await probeBroker(m.brokerUrl);
+    results.push({
+      slug: m.slug,
+      brokerUrl: m.brokerUrl,
+      pubkey: m.pubkey,
+      reachable: probe.ok,
+      error: probe.error,
+    });
+    if (probe.ok) {
+      console.log(green("reachable"));
+    } else {
+      console.log(red(`unreachable (${probe.error})`));
+    }
+  }
+
+  console.log("");
+  for (const r of results) {
+    console.log(dim(`  ${r.slug}: pubkey ${r.pubkey.slice(0, 16)}…`));
+  }
+
+  const allOk = results.every((r) => r.reachable);
+  console.log("");
+  if (allOk) {
+    console.log(green("All meshes reachable."));
+    process.exit(0);
+  } else {
+    const broken = results.filter((r) => !r.reachable).length;
+    console.log(red(`${broken} of ${results.length} mesh(es) unreachable.`));
+    process.exit(1);
+  }
+}