AgentHub/scripts/plugin-doctor.js

#!/usr/bin/env node
/**
 * @file plugin-doctor.js
 * @description Reports the health of a plugin-installed AgentHub: Node version,
 * npm, free disk on the data dir, bootstrap state, runtime dependencies (every
 * declared package, not just that node_modules exists), server liveness,
 * duplicate hook entries (the one failure that silently doubles every token and
 * cost figure), the `agenthub` CLI launcher and its PATH, the `tmux` binary
 * every browser-started run depends on, and the dashboard bundle — quoting the
 * last build error when it is missing.
 * Read-only — it diagnoses, it never repairs.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const fs = require("fs");
const os = require("os");
const path = require("path");
const { spawnSync } = require("child_process");

const boot = require("./plugin-bootstrap");
const { getSettingsPath, getDataDir } = require("../server/lib/claude-home");

const PLUGIN_ROOT = path.resolve(__dirname, "..");

/** @returns {{level:"ok"|"warn"|"fail", label:string, detail:string}[]} */
function diagnose() {
  const rt = boot.runtimeDir();
  const out = [];
  const add = (level, label, detail) => out.push({ level, label, detail });

  add(
    boot.nodeVersionOk() ? "ok" : "fail",
    "Node",
    boot.nodeVersionOk()
      ? `v${process.versions.node}`
      : `v${process.versions.node} — AgentHub needs >= ${boot.MIN_NODE.join(".")} (node:sqlite)`
  );

  add("ok", "Plugin root", PLUGIN_ROOT);
  add("ok", "Data dir", getDataDir());

  const state = boot.readState(rt);
  if (!state) {
    add(
      "warn",
      "Bootstrap",
      `no state recorded — start a new session, or check ${rt}/bootstrap.log`
    );
  } else {
    const moved = state.pluginRoot !== PLUGIN_ROOT;
    add(
      moved ? "warn" : "ok",
      "Bootstrap",
      moved
        ? `recorded against a previous plugin version (${state.pluginRoot}) — run /agenthub-update`
        : `last run ${state.updatedAt}`
    );
  }

  add(...runtimeDepsStatus(rt));
  add(...npmStatus());
  add(...diskStatus());

  const live = boot.liveServers();
  add(
    live.length ? "ok" : "fail",
    "Server",
    live.length
      ? `listening on ${live.map((s) => `http://localhost:${s.port}`).join(", ")}`
      : `not running — see ${path.join(rt, "server.log")}`
  );

  const dup = countLegacyHookEntries();
  add(
    dup ? "fail" : "ok",
    "Hooks",
    dup
      ? `${dup} entr${dup === 1 ? "y" : "ies"} in ${getSettingsPath()} duplicate the plugin's hooks — ` +
          `every event is counted twice. Remove them (a new session does it automatically).`
      : "provided by the plugin only"
  );

  add(...cliStatus());
  add(...systemdStatus());
  add(...tmuxStatus());

  add(...dashboardUiStatus(rt));

  return out;
}

/**
 * `node_modules` existing proves nothing: an interrupted install or a truncated
 * cache entry leaves a directory that npm reports as installed and that is
 * missing packages — the failure mode that took the client build down with
 * TS2318. Check every declared runtime dependency actually landed.
 *
 * Only `dependencies` count. `optionalDependencies` (better-sqlite3) are allowed
 * to be absent by design — the server falls back to `node:sqlite`.
 */
function runtimeDepsStatus(rt) {
  const nm = path.join(rt, "node_modules");
  if (!fs.existsSync(nm)) return ["fail", "Runtime deps", "missing — run /agenthub-update"];

  let declared;
  try {
    declared = Object.keys(
      JSON.parse(fs.readFileSync(path.join(rt, "package.json"), "utf8")).dependencies || {}
    );
  } catch {
    return ["warn", "Runtime deps", `${nm} — no manifest beside it, cannot verify the tree`];
  }

  const missing = declared.filter((d) => !fs.existsSync(path.join(nm, d, "package.json")));
  if (missing.length) {
    return [
      "fail",
      "Runtime deps",
      `${missing.join(", ")} declared but not installed — the tree is incomplete. ` +
        `Delete ${nm} and run /agenthub-update`,
    ];
  }
  return ["ok", "Runtime deps", `${declared.length} packages in ${nm}`];
}

/** No npm, no dashboard bundle and no runtime install — both go through it. */
function npmStatus() {
  const res = spawnSync(process.platform === "win32" ? "npm.cmd" : "npm", ["-v"], {
    encoding: "utf8",
    shell: process.platform === "win32",
  });
  if (res.status !== 0) {
    return ["fail", "npm", "not runnable — the runtime install and the UI build both need it"];
  }
  return ["ok", "npm", `v${res.stdout.trim()}`];
}

/**
 * A full disk is the quiet cause of half-written installs and a SQLite file that
 * refuses writes, and it reads as unrelated breakage everywhere else.
 */
function diskStatus() {
  const dir = getDataDir();
  let free;
  try {
    const s = fs.statfsSync(dir);
    free = s.bavail * s.bsize;
  } catch {
    return ["ok", "Disk", "not measurable on this platform"];
  }
  const mb = Math.round(free / 1024 / 1024);
  if (free < 200 * 1024 * 1024) {
    return ["fail", "Disk", `${mb} MB free on ${dir} — installs and the database will truncate`];
  }
  if (free < 1024 * 1024 * 1024) return ["warn", "Disk", `${mb} MB free on ${dir}`];
  return ["ok", "Disk", `${Math.round(mb / 1024)} GB free`];
}

/**
 * When the bundle is missing the useful thing is not "run /agenthub-open" — it
 * is why the last build failed, which sits in `client-build.log` and which
 * nobody thinks to open.
 */
function dashboardUiStatus(rt) {
  const dist = process.env.DASHBOARD_CLIENT_DIST || path.join(rt, "client-dist");
  if (fs.existsSync(path.join(dist, "index.html"))) return ["ok", "Dashboard UI", dist];

  const err = lastBuildError(path.join(rt, "client-build.log"));
  return [
    "warn",
    "Dashboard UI",
    err
      ? `not built — the last build failed with: ${err} (full log: ${path.join(rt, "client-build.log")})`
      : "not built yet — run /agenthub-open",
  ];
}

/** First compiler/npm error line of the log's last build, or null. */
function lastBuildError(logPath) {
  let lines;
  try {
    lines = fs.readFileSync(logPath, "utf8").split("\n");
  } catch {
    return null;
  }
  const hit = lines.filter((l) => /\berror\b|npm ERR!/i.test(l)).pop();
  return hit ? hit.trim().slice(0, 200) : null;
}

/**
 * The failure this row exists for is silent by construction: a unit still
 * naming a retired plugin cache directory keeps a running dashboard looking
 * perfectly healthy, and only bites at the next reboot — when the server does
 * not come back, from a path Claude Code deleted weeks earlier. Nothing else
 * in this report would show it.
 *
 * WARN, never FAIL: the dashboard in front of you is working, and on macOS,
 * Windows or a Linux box without systemd there is no unit to have an opinion
 * about.
 */
function systemdStatus() {
  const svc = require("./service-manager");
  const unit = svc.unitPath("agenthub");
  const row = svc.kind;

  if (!svc.unitIsOurs("agenthub")) {
    if (fs.existsSync(unit)) {
      return ["warn", row, `${unit} exists but was not written by AgentHub — left untouched`];
    }
    return [
      "ok",
      row,
      svc.systemctlAvailable()
        ? "no unit — the server is started per session (install one with `agenthub service install`)"
        : "not available on this platform — the server is started per session",
    ];
  }

  if (svc.unitIsStale("agenthub", PLUGIN_ROOT)) {
    return [
      "warn",
      row,
      `${unit} still points at a previous plugin version — the dashboard will NOT come back after a reboot. ` +
        `Starting a new Claude Code session repairs it; or run: node ${path.join(PLUGIN_ROOT, "scripts", "plugin-bootstrap.js")} --force`,
    ];
  }

  if (!svc.unitIsActive("agenthub")) {
    return [
      "warn",
      row,
      svc.kind === "launchd"
        ? "LaunchAgent is installed and current but not running — start it with `agenthub service install`"
        : "unit is installed and current but not running — start it with `systemctl --user start agenthub`",
    ];
  }
  return ["ok", row, `${svc.label} is current and running — the dashboard survives reboots`];
}

/**
 * WARN (never FAIL) when `tmux` is absent: every run the dashboard starts is a
 * tmux session (`server/lib/tmux.js`), so without the binary the run console,
 * `agenthub lanes shell` and the session-reload keystrokes all fail — while
 * sessions, analytics, lanes and the CLI keep working. A partial feature
 * loss must not fail a doctor run.
 *
 * This checks the doctor's own PATH. A server started as a systemd `--user`
 * service can still see a different one — `GET /api/run/tmux` is the server's
 * own answer, and `agenthub doctor` reports that.
 *
 * Also WARN below tmux 3.7, the first with pane scrollbars (`tmux.js` turns
 * them on), and when a new binary still talks to an older running server — a
 * server keeps its version until every tmux session has closed. The doctor
 * only says so: it never installs or restarts tmux.
 */
const hasScrollbars = (version) => {
  const m = /(\d+)\.(\d+)/.exec(version || "");
  return !!m && (Number(m[1]) > 3 || (Number(m[1]) === 3 && Number(m[2]) >= 7));
};

function tmuxStatus() {
  const tmux = require("../server/lib/tmux");
  const client = tmux.clientVersion();
  if (!client) {
    return [
      "warn",
      "tmux",
      "not found — Start Run and `agenthub lanes shell` will fail (everything else is unaffected). " +
        "Install it: sudo apt install tmux / brew install tmux (Windows: run AgentHub under WSL2)",
    ];
  }
  if (!hasScrollbars(client)) {
    return [
      "warn",
      "tmux",
      `${client} works, but terminal panes get a scrollbar only from tmux 3.7. ` +
        "Upgrade: brew upgrade tmux (macOS); on Linux, when the distro ships an older one " +
        "(Ubuntu 24.04 has 3.4), build the release from https://github.com/tmux/tmux/releases " +
        "(needs libevent-dev libncurses-dev bison: ./configure && make && sudo make install)",
    ];
  }
  const server = tmux.serverVersion();
  if (server && !hasScrollbars(server)) {
    return [
      "warn",
      "tmux",
      `${client} installed, but the running tmux server is ${server} — panes get their ` +
        "scrollbar once every tmux session has closed (or after a reboot)",
    ];
  }
  return ["ok", "tmux", `${client} on PATH — the run console can start sessions, with scrollbars`];
}

function countLegacyHookEntries() {
  try {
    const settings = JSON.parse(fs.readFileSync(getSettingsPath(), "utf8"));
    if (!settings.hooks) return 0;
    const isLegacy = boot.isCheckoutHookEntry();
    return Object.values(settings.hooks)
      .filter(Array.isArray)
      .reduce((n, entries) => n + entries.filter(isLegacy).length, 0);
  } catch {
    return 0;
  }
}

function cliStatus() {
  const dir = path.join(os.homedir(), ".local", "bin");
  const file = path.join(dir, process.platform === "win32" ? "agenthub.cmd" : "agenthub");
  if (!fs.existsSync(file)) return ["warn", "agenthub CLI", `no launcher at ${file}`];
  const onPath = (process.env.PATH || "")
    .split(path.delimiter)
    .some((p) => path.resolve(p) === path.resolve(dir));
  return onPath
    ? ["ok", "agenthub CLI", file]
    : [
        "warn",
        "agenthub CLI",
        `${file} exists but ${dir} is not on PATH — add${
          process.platform === "darwin" ? " to ~/.zshrc" : ""
        }: export PATH="${dir}:$PATH"`,
      ];
}

function report() {
  const marks = { ok: "OK  ", warn: "WARN", fail: "FAIL" };
  const rows = diagnose();
  for (const r of rows) console.log(`${marks[r.level]}  ${r.label.padEnd(14)} ${r.detail}`);
  return rows.some((r) => r.level === "fail") ? 1 : 0;
}

if (require.main === module) process.exitCode = report();

module.exports = { diagnose, report, countLegacyHookEntries };