AgentHub/server/__tests__/server-s3-review5.test.js

/**
 * @file server-s3-review5.test.js
 * @description S3 plan, fifth review: a member's Antigravity conversation is
 * read from a private copy (a FIFO beside it blocks nothing); a developer's
 * extra workspace folder is refused outside their home before it is probed;
 * the config reader never serves the data dir (pane tokens, push keys, the
 * database); a stopped or flooding member tmux server and a hung sudo never
 * block the dashboard nor blind it to other members' panes; a one-line 512 MB
 * file, a huge member file and a sparse transcript neither crash the server
 * nor fill the host's disk; an async route that throws answers 500; a
 * non-admin owns no host-folder workspace and a pane's cwd is its
 * workspace's account's; a pane token works only from its pane's uid; an
 * analyst's GET path stays in their own folder; a drop goes to the pane's
 * account. A fake passwd (every member = this test's uid) and server.conf
 * make the members provisioned; fake sudo runs their commands as this
 * account — and a fake `sudo` on PATH that never returns stands in for a
 * stalled member, in a child process.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { describe, it, before, after } = require("node:test");
const assert = require("node:assert/strict");
const path = require("node:path");
const fs = require("node:fs");
const os = require("node:os");
const { spawnSync } = require("node:child_process");

const TMP = fs.realpathSync(fs.mkdtempSync(path.join(os.tmpdir(), "server-s3-review5-")));
const USERS = path.join(TMP, "users");
const MIA = path.join(USERS, "mia");
const BOB = path.join(USERS, "bob");
// The real layout: the data dir (and its database) inside CLAUDE_HOME.
const DATA = path.join(TMP, "host-claude", "agenthub");
process.env.DASHBOARD_DATA_DIR = DATA;
process.env.DASHBOARD_DB_PATH = path.join(DATA, "dashboard.db");
process.env.DASHBOARD_LIVENESS_PROBE = "0";
process.env.LANES_ROOT = path.join(TMP, "lanes");
process.env.CLAUDE_HOME = path.join(TMP, "host-claude");
process.env.CODEX_HOME = path.join(TMP, "host-codex");
process.env.AGENTHUB_SERVER_CONF = path.join(TMP, "server.conf");
process.env.AGENTHUB_PASSWD = path.join(TMP, "passwd");
process.env.AGENTHUB_USERS_ROOT = USERS;

const { createApp, startServer } = require("../index");
const { db } = require("../db");
const auth = require("../lib/auth");
const linux = require("../lib/linux-accounts");
const runAs = require("../lib/run-as");
const tmux = require("../lib/tmux");
const { fakeSudo } = require("./fixtures/fake-sudo");

let server;
let BASE;
const cookies = {};

const call = (who, method, p, body) =>
  fetch(BASE + p, {
    method,
    headers: { "Content-Type": "application/json", cookie: cookies[who] },
    body: body ? JSON.stringify(body) : undefined,
  }).then(async (r) => ({ status: r.status, body: await r.json().catch(() => null) }));

const idOf = (name) => db.prepare("SELECT id FROM users WHERE username = ?").get(name).id;
const addLane = (cwd, owner) =>
  Number(
    db
      .prepare("INSERT INTO lanes (cwd, tool, owner_id, status) VALUES (?, 'claude', ?, 'idle')")
      .run(cwd, idOf(owner)).lastInsertRowid
  );

const UID = process.getuid();
let tmuxCalls = [];
let liveRuns = new Set();
const fakeTmux = (args) => {
  tmuxCalls.push(args);
  if (args[0] === "-V") return "tmux 3.4";
  if (args.includes("has-session")) {
    if (liveRuns.has(String(args.at(-1)).replace(/^=/, ""))) return "";
    throw Object.assign(new Error("no"), { status: 1 });
  }
  return "";
};

before(async () => {
  for (const d of [path.join(MIA, "proj"), path.join(MIA, "extra"), path.join(BOB, "private")])
    fs.mkdirSync(d, { recursive: true });
  fs.writeFileSync(
    process.env.AGENTHUB_PASSWD,
    ["mia", "bob", "ana", "boss"].map((n) => `ah-${n}:x:${UID}:${UID}::/:/bin/sh`).join("\n") + "\n"
  );
  runAs.__resetCache();
  fs.writeFileSync(
    process.env.AGENTHUB_SERVER_CONF,
    `HOST_USER=h\nHOST_UID=1\nUSERS_ROOT=${USERS}\nPORT=4820\n`
  );
  linux.__resetConfCache();
  linux.__setRunImpl(() => "ok");
  runAs.__setExecImpl(fakeSudo().exec);
  tmux.__setExecImpl(fakeTmux);
  server = await startServer(createApp(), 0);
  BASE = `http://127.0.0.1:${server.address().port}`;
  process.env.AGENTHUB_MODE = "server";
  for (const [n, role] of [
    ["mia", "developer"],
    ["bob", "developer"],
    ["ana", "analyst"],
    ["boss", "admin"],
  ]) {
    await auth.createUser(n, `${n}-pass-123`, role);
    const login = await fetch(`${BASE}/api/auth/login`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({ username: n, password: `${n}-pass-123` }),
    });
    cookies[n] = login.headers.get("set-cookie").split(";")[0];
  }
});

after(() => {
  tmux.__reset();
  delete process.env.AGENTHUB_MODE;
  delete process.env.AGENTHUB_USERS_ROOT;
  server?.close();
  fs.rmSync(TMP, { recursive: true, force: true });
});

describe("a member's Antigravity conversation", () => {
  it("is read from a private copy: a FIFO beside it blocks nothing", () => {
    const Database = require("better-sqlite3");
    const dir = path.join(MIA, ".gemini", "antigravity-cli", "conversations");
    fs.mkdirSync(dir, { recursive: true });
    const file = path.join(dir, "7481e37e-9157-4145-b985-2ea9a2117f52.db");
    const c = new Database(file);
    c.exec(`CREATE TABLE gen_metadata (idx integer, data blob, PRIMARY KEY (idx));
      CREATE TABLE trajectory_metadata_blob (id text, data blob, PRIMARY KEY (id));`);
    c.close();
    // A "hot journal" SQLite would open by name — and block on, as a FIFO.
    assert.equal(spawnSync("mkfifo", [`${file}-journal`]).status, 0);
    // In a child: the old open blocked its whole thread, which no test timeout interrupts.
    const child = spawnSync(
      process.execPath,
      [
        "-e",
        `const r = require(${JSON.stringify(path.join(__dirname, "..", "lib", "antigravity-usage"))}).readConversation(${JSON.stringify(file)});
         process.stdout.write(JSON.stringify(r));`,
      ],
      { env: { ...process.env, AGENTHUB_MODE: "server" }, timeout: 15_000, encoding: "utf8" }
    );
    assert.equal(child.signal, null, "the read never blocked");
    assert.equal(child.status, 0, child.stderr);
    assert.deepEqual(JSON.parse(child.stdout), { cwd: null, usage: {}, model: null });
    assert.ok(fs.statSync(`${file}-journal`).isFIFO(), "the member's files are left alone");
  });
});

describe("a developer's extra workspace folder", () => {
  it("is refused outside their own home before anything probes it", async () => {
    const lane = addLane(path.join(MIA, "proj"), "mia");
    const add = (p) => call("mia", "POST", `/api/lanes/${lane}/sources/folder`, { path: p });
    // Bob's folder answers exactly like a folder that does not exist.
    for (const p of [path.join(BOB, "private"), path.join(BOB, "nope")]) {
      const r = await add(p);
      assert.equal(r.status, 403, `${p}: ${JSON.stringify(r.body)}`);
      assert.equal(r.body.error.code, "EFOLDER");
    }
    // A link in her own home that points out is refused too.
    fs.symlinkSync(path.join(BOB, "private"), path.join(MIA, "to-bob"));
    const linked = await add(path.join(MIA, "to-bob"));
    assert.equal(linked.status, 403, JSON.stringify(linked.body));
    // Her own folder is fine.
    const mine = await add(path.join(MIA, "extra"));
    assert.equal(mine.status, 201, JSON.stringify(mine.body));
    assert.deepEqual(
      mine.body.sources.map((s) => s.path),
      [path.join(MIA, "extra")]
    );
  });
});

describe("the Claude config file reader", () => {
  it("never serves AgentHub's data dir: pane tokens, push keys, the database", async () => {
    fs.mkdirSync(path.join(DATA, "proxy-settings"), { recursive: true });
    const token = path.join(DATA, "proxy-settings", "gw--agenthub-lane-4.json");
    fs.writeFileSync(token, '{"env":{"ANTHROPIC_AUTH_TOKEN":"ahpane_SECRET"}}');
    fs.writeFileSync(path.join(DATA, "vapid-keys.json"), '{"privateKey":"VAPID-SECRET"}');
    // Through a link elsewhere in CLAUDE_HOME too.
    fs.symlinkSync(token, path.join(TMP, "host-claude", "innocent.json"));
    for (const who of ["ana", "boss"]) {
      for (const f of [
        token,
        path.join(DATA, "vapid-keys.json"),
        path.join(DATA, "dashboard.db"),
        path.join(TMP, "host-claude", "innocent.json"),
      ]) {
        const r = await call(who, "GET", `/api/cc-config/file?path=${encodeURIComponent(f)}`);
        assert.equal(r.status, 400, `${who} ${f}: ${JSON.stringify(r.body).slice(0, 200)}`);
        assert.ok(!/SECRET|SQLite/.test(JSON.stringify(r.body)));
      }
    }
    fs.writeFileSync(path.join(TMP, "host-claude", "settings.json"), '{"ok":true}');
    const ok = await call(
      "ana",
      "GET",
      `/api/cc-config/file?path=${encodeURIComponent(path.join(TMP, "host-claude", "settings.json"))}`
    );
    assert.equal(ok.status, 200);
  });
});

// ── Robustness: what a member can do to the dashboard's one thread ─────────

const LIB = path.join(__dirname, "..", "lib");
/** Run `code` in a child (the old code hung or crashed the whole process). */
const inChild = (code, env = {}) =>
  spawnSync(process.execPath, ["-e", code], {
    env: { ...process.env, AGENTHUB_MODE: "server", ...env },
    timeout: 40_000,
    encoding: "utf8",
  });
/** A sparse file of `size` bytes (costs no disk), optionally with text at both ends. */
function sparse(file, size, { head = "", tail = "" } = {}) {
  fs.mkdirSync(path.dirname(file), { recursive: true });
  fs.writeFileSync(file, head);
  fs.truncateSync(file, size - Buffer.byteLength(tail));
  if (tail) fs.appendFileSync(file, tail);
}

describe("a member's stopped tmux server or planted FIFO", () => {
  it("never blocks the dashboard: every sudo into a member is bounded", () => {
    const lane = addLane(path.join(MIA, "tm"), "mia");
    const net = require("node:net");
    const sock = path.join(MIA, ".agenthub", "tmux", "sock");
    fs.mkdirSync(path.dirname(sock), { recursive: true });
    fs.rmSync(sock, { force: true });
    const srv = net.createServer().listen(sock);
    // sudo that never returns: a tmux client talking to a SIGSTOPped server.
    const bin = path.join(TMP, "fakebin");
    fs.mkdirSync(bin, { recursive: true });
    fs.writeFileSync(path.join(bin, "sudo"), "#!/bin/sh\nexec sleep 60\n", { mode: 0o755 });
    try {
      const child = inChild(
        `const runAs = require(${JSON.stringify(`${LIB}/run-as`)});
         const tmux = require(${JSON.stringify(`${LIB}/tmux`)});
         const proj = ${JSON.stringify(path.join(MIA, "proj"))};
         const time = (f) => { const t = Date.now(); try { f(); return { ms: Date.now() - t }; }
           catch (e) { return { code: e.code, ms: Date.now() - t }; } };
         let live;
         const first = time(() => (live = tmux.liveSessions()));
         const again = time(() => tmux.liveSessions());
         process.stdout.write(JSON.stringify({
           isSet: live instanceof Set,
           keeps: live.has("agenthub-lane-${lane}"),
           other: live.has("agenthub-lane-999999"),
           first, again,
           git: time(() => runAs.execIn(proj, "git", ["status"])),
           write: time(() => runAs.writeAs(runAs.accountForPath(proj), proj + "/f.txt", "", "x")),
         }));`,
        { PATH: `${bin}:${process.env.PATH}` }
      );
      assert.equal(child.signal, null, "nothing hung");
      assert.equal(child.status, 0, child.stderr);
      const r = JSON.parse(child.stdout);
      // Her panes are UNKNOWN, not dead: nothing of hers is ended for a stall.
      assert.equal(r.isSet, true, "the host's answer still counts");
      assert.equal(r.keeps, true);
      assert.equal(r.other, false);
      assert.ok(r.first.ms < 10_000, `first list: ${r.first.ms} ms`);
      assert.ok(r.again.ms < 500, `backed off: ${r.again.ms} ms`);
      assert.equal(r.git.code, "ETIMEDOUT");
      assert.equal(r.write.code, "ETIMEDOUT");
    } finally {
      srv.close();
    }
  });

  it("one member's failing server never blinds the dashboard to everyone else's", () => {
    const net = require("node:net");
    const sock = path.join(MIA, ".agenthub", "tmux", "sock");
    fs.mkdirSync(path.dirname(sock), { recursive: true });
    fs.rmSync(sock, { force: true });
    const srv = net.createServer().listen(sock);
    const lane = addLane(path.join(MIA, "proj2"), "mia");
    let memberCalls = 0;
    let hostFails = false;
    tmux.__reset();
    tmux.__setExecImpl(() => {
      if (hostFails) throw Object.assign(new Error("fork"), { code: "EAGAIN" });
      return "agenthub-lane-1\n";
    });
    tmux.__setAccountImpl(
      (name) => runAs.accountForSession(name),
      () => {
        memberCalls += 1;
        throw Object.assign(new Error("spawnSync sudo ENOBUFS"), { code: "ENOBUFS" });
      }
    );
    try {
      const live = tmux.liveSessions();
      assert.ok(live, "not null for everyone");
      assert.equal(live.has("agenthub-lane-1"), true);
      assert.equal(live.has(`agenthub-lane-${lane}`), true, "hers: unknown, kept");
      assert.equal(live.has("agenthub-lane-999999"), false);
      tmux.__setExecImpl(() => "agenthub-lane-1\n");
      tmux.liveSessions();
      assert.equal(memberCalls, 1, "a flooding server is not asked again at once");
      hostFails = true;
      tmux.__setExecImpl(() => {
        throw Object.assign(new Error("fork"), { code: "EAGAIN" });
      });
      assert.equal(tmux.liveSessions(), null, "our own failure still proves nothing");
    } finally {
      srv.close();
      tmux.__reset();
      tmux.__setExecImpl(fakeTmux);
    }
  });
});

describe("a member's huge or sparse files", () => {
  it("a 600 MB line without a newline never crashes the transcript reader", () => {
    const big = path.join(TMP, "one-line.jsonl");
    sparse(big, 600 * 1024 * 1024, { head: '{"type":"user"' });
    try {
      const child = inChild(
        `require(${JSON.stringify(path.join(__dirname, "..", "..", "scripts", "import-history"))})
           .parseSessionFile(${JSON.stringify(big)})
           .then(() => process.stdout.write("survived"));`
      );
      assert.equal(child.status, 0, child.stderr.slice(-400));
      assert.equal(child.stdout, "survived");
    } finally {
      fs.rmSync(big, { force: true });
    }
  });

  it("readLines keeps line numbers and never builds an over-long line", async () => {
    const f = path.join(TMP, "lines.jsonl");
    fs.writeFileSync(f, `a\r\n\n${"x".repeat(3 << 20)}\nlast`);
    const out = [];
    for await (const l of runAs.readLines(f, { maxLine: 1 << 20 })) out.push(l);
    assert.deepEqual(out, ["a", "", "", "last"]);
    fs.rmSync(f);
  });

  it("a member's file is read only up to its cap", async () => {
    const f = path.join(MIA, ".codex", "auth.json");
    sparse(f, 70 * 1024 * 1024);
    assert.throws(() => runAs.readFileSafe(f, "utf8"), { code: "ETOOBIG" });
    await assert.rejects(runAs.readFileSafeAsync(f), { code: "ETOOBIG" });
    fs.writeFileSync(f, `{"pad":"${"x".repeat(2 << 20)}"}`);
    assert.throws(() => runAs.readFileSafe(f, "utf8", { max: 1 << 20 }), { code: "ETOOBIG" });
    fs.writeFileSync(f, '{"ok":1}');
    assert.equal(runAs.readFileSafe(f, "utf8"), '{"ok":1}');
    // A member transcript past the cap is not read on the event loop.
    const t = path.join(MIA, ".claude", "projects", "p", "big.jsonl");
    sparse(t, 300 * 1024 * 1024);
    const real = fs.readSync;
    let reads = 0;
    fs.readSync = (...a) => {
      reads += 1;
      return real(...a);
    };
    try {
      const TranscriptCache = require("../lib/transcript-cache");
      new TranscriptCache()._streamRange(t, 0, fs.statSync(t).size);
    } finally {
      fs.readSync = real;
    }
    assert.equal(reads, 0);
    fs.rmSync(t);
  });

  it("the transcript snapshot never fills the host's disk from a sparse file", () => {
    const { snapshotTranscript } = require("../../scripts/import-history");
    const { getTranscriptSnapshotDir } = require("../lib/claude-home");
    const proj = path.join(MIA, ".claude", "projects", "-p");
    const huge = "11111111-2222-4333-8444-555555555555";
    sparse(path.join(proj, `${huge}.jsonl`), 300 * 1024 * 1024);
    snapshotTranscript(path.join(proj, `${huge}.jsonl`), huge);
    assert.equal(fs.existsSync(path.join(getTranscriptSnapshotDir(), `${huge}.jsonl`)), false);
    // Under the cap: copied, and its hole stays a hole.
    const holey = "11111111-2222-4333-8444-666666666666";
    sparse(path.join(proj, `${holey}.jsonl`), 32 * 1024 * 1024, {
      head: '{"a":1}\n',
      tail: '{"z":1}\n',
    });
    snapshotTranscript(path.join(proj, `${holey}.jsonl`), holey);
    const copy = path.join(getTranscriptSnapshotDir(), `${holey}.jsonl`);
    const st = fs.statSync(copy);
    assert.equal(st.size, 32 * 1024 * 1024);
    assert.ok(st.blocks * 512 < 4 * 1024 * 1024, `copy allocated ${st.blocks * 512} bytes`);
    const text = fs.readFileSync(copy);
    assert.equal(text.subarray(0, 8).toString(), '{"a":1}\n');
    assert.equal(text.subarray(-8).toString(), '{"z":1}\n');
  });
});

describe("a request that makes an async route throw", () => {
  it("answers an error instead of taking the server down", async () => {
    const r = await call("mia", "POST", "/api/lanes/worktree", {
      sourceRepo: path.join(USERS, "ghost", "x"),
      branch: "b",
    });
    assert.equal(r.status, 403, JSON.stringify(r.body));
    assert.equal(r.body.error.code, "EMEMBERLANE");
    // Any async handler that rejects: a 500, not an exit.
    const express = require("express");
    const app = express();
    app.get("/boom", async () => {
      await null;
      throw new Error("boom");
    });
    const s = await new Promise((ok) => {
      const h = app.listen(0, () => ok(h));
    });
    try {
      const res = await fetch(`http://127.0.0.1:${s.address().port}/boom`);
      assert.equal(res.status, 500);
    } finally {
      s.close();
    }
    assert.equal((await call("mia", "GET", "/api/lanes")).status, 200, "still serving");
  });
});

describe("who a pane runs as", () => {
  const pty = require("../lib/pty-run");
  const HOST = path.join(TMP, "hostdir");
  before(() => fs.mkdirSync(HOST, { recursive: true }));

  it("a non-admin owns no workspace outside their own home: no host pane for them", () => {
    const lane = addLane(HOST, "boss");
    assert.throws(() => auth.assignWorkspace(lane, "mia"), { code: "EOWNERFOLDER" });
    assert.throws(() => auth.assignWorkspace(lane, "ana"), { code: "EOWNERFOLDER" });
    // One that got there anyway (assigned before this rule, or a demoted admin's).
    const theirs = addLane(path.join(HOST, "x"), "mia");
    assert.throws(() => pty.spawnRun({ laneId: theirs, cwd: path.join(HOST, "x"), tool: "claude" }), {
      code: "EOWNERFOLDER",
    });
    assert.throws(() => pty.spawnShell({ laneId: theirs, cwd: path.join(HOST, "x") }), {
      code: "EOWNERFOLDER",
    });
    fs.mkdirSync(path.join(HOST, "y"), { recursive: true });
    const viaRoute = addLane(path.join(HOST, "y"), "mia");
    return call("mia", "POST", "/api/run", { laneId: viaRoute, cwd: path.join(HOST, "y") }).then(
      (r) => {
        assert.equal(r.status, 409, JSON.stringify(r.body));
        assert.equal(r.body.error.code, "EOWNERFOLDER");
      }
    );
  });

  it("demoting or disabling a user ends their panes that run as the host", () => {
    const lane = addLane(path.join(HOST, "z"), "boss");
    const run = pty.runIdForLane(lane, 0);
    liveRuns = new Set([run]);
    tmuxCalls = [];
    try {
      auth.setRole("boss", "developer");
      assert.ok(
        tmuxCalls.some((a) => a[0] === "kill-session" && String(a.at(-1)).includes(run)),
        "the host pane was killed"
      );
    } finally {
      auth.setRole("boss", "admin");
      liveRuns = new Set();
    }
  });

  it("a pane's cwd must be its workspace's account's (POST /api/run names the cwd)", async () => {
    const mine = addLane(path.join(MIA, "own"), "mia");
    assert.throws(
      () => pty.spawnRun({ laneId: mine, cwd: path.join(BOB, "private"), tool: "claude" }),
      { code: "ECWDACCOUNT" }
    );
    const host = addLane(path.join(HOST, "h"), "boss");
    const r = await call("boss", "POST", "/api/run", { laneId: host, cwd: path.join(MIA, "proj") });
    assert.equal(r.status, 409, JSON.stringify(r.body));
    assert.equal(r.body.error.code, "ECWDACCOUNT");
  });
});

describe("a pane token", () => {
  const hookAuth = require("../lib/hook-auth");
  const crypto = require("node:crypto");

  it("is accepted only from the Linux account its pane runs as", async () => {
    const lane = addLane(path.join(MIA, "pt"), "mia");
    const run = `agenthub-lane-${lane}`;
    const token = "ahpane_review5-token-value-0123456789";
    db.prepare(
      `INSERT INTO dashboard_runs (id, mode, cwd, status, lane_id, pane_token_hash)
       VALUES (?, 'interactive', ?, 'running', ?, ?)`
    ).run(run, path.join(MIA, "pt"), lane, crypto.createHash("sha256").update(token).digest("hex"));
    tmux.__setAccountImpl(
      (name) => runAs.accountForSession(name),
      (acct, args) => fakeTmux(args)
    );
    liveRuns = new Set([run]);
    const asPane = () =>
      fetch(`${BASE}/api/sessions`, { headers: { "x-agenthub-pane-token": token } }).then(
        (r) => r.status
      );
    try {
      hookAuth.__setPeerUid(() => UID); // mia's uid in this test's passwd
      assert.equal(await asPane(), 200);
      hookAuth.__setPeerUid(() => UID + 7); // another local account
      assert.equal(await asPane(), 401);
      hookAuth.__setPeerUid(() => null); // a peer the kernel table does not show
      assert.equal(await asPane(), 401);
      // The AI Proxy gateway takes the same token: refused from another uid.
      hookAuth.__setPeerUid(() => UID + 7);
      const gw = await fetch(`${BASE}/api/proxy-gw/x/v1/messages`, {
        method: "POST",
        headers: { authorization: `Bearer ${token}` },
      });
      assert.equal(gw.status, 401);
    } finally {
      hookAuth.__setPeerUid(null);
      liveRuns = new Set();
      db.prepare("DELETE FROM dashboard_runs WHERE id = ?").run(run);
      tmux.__reset();
      tmux.__setExecImpl(fakeTmux);
    }
  });
});

describe("an analyst's GET that names a path", () => {
  it("stays in their own folder or workspaces, like any non-admin's request", async () => {
    fs.mkdirSync(path.join(USERS, "ana", "work"), { recursive: true });
    const q = encodeURIComponent(path.join(BOB, "private"));
    for (const p of [
      `/api/lanes/browse?path=${q}`,
      `/api/lanes/branches?repo=${q}`,
      `/api/run/files?cwd=${q}`,
    ]) {
      const r = await call("ana", "GET", p);
      assert.equal(r.status, 403, `${p}: ${JSON.stringify(r.body)}`);
      assert.equal(r.body.error.code, "EFOLDER");
    }
    const own = await call(
      "ana",
      "GET",
      `/api/lanes/browse?path=${encodeURIComponent(path.join(USERS, "ana"))}`
    );
    assert.equal(own.status, 200, JSON.stringify(own.body));
    assert.equal((await call("boss", "GET", `/api/lanes/browse?path=${q}`)).status, 200);
  });
});

describe("a dropped file", () => {
  const drop = (who, laneId) =>
    fetch(`${BASE}/api/run/drop-file?name=a.txt${laneId ? `&laneId=${laneId}` : ""}`, {
      method: "POST",
      headers: { "Content-Type": "application/octet-stream", cookie: cookies[who] },
      body: Buffer.from("hello"),
    }).then(async (r) => ({ status: r.status, body: await r.json().catch(() => null) }));

  it("goes where the workspace's panes can read it, not to the requester's account", async () => {
    fs.mkdirSync(path.join(MIA, ".agenthub", "handoff"), { recursive: true });
    const miaLane = addLane(path.join(MIA, "drop"), "mia");
    const byAdmin = await drop("boss", miaLane);
    assert.equal(byAdmin.status, 200, JSON.stringify(byAdmin.body));
    assert.ok(
      byAdmin.body.path.startsWith(path.join(MIA, ".agenthub", "handoff", "drops") + path.sep),
      byAdmin.body.path
    );
    // A host workspace's pane runs as the host: the host's own 0700 drops dir.
    const hostLane = addLane(path.join(TMP, "hostdir", "d"), "boss");
    const host = await drop("boss", hostLane);
    assert.equal(host.status, 200, JSON.stringify(host.body));
    assert.equal(path.dirname(host.body.path), path.join(DATA, "drops"));
    // Another member's workspace is not one to name.
    assert.equal((await drop("bob", miaLane)).status, 404);
  });
});