fix: v2.5.7 — panes work on psmux, the Windows tmux

psmux (the WinGet `tmux` on Windows) has no `=name` exact-match targets: it
answered "no server running on session '=agenthub-lane-1'" for a live pane,
so every Windows start reported "the session's command exited as soon as it
started" while the session ran on, and the browser could not attach.

- server/lib/tmux.js: `session`/`pane` targets probe the first live session
  once — `=name` failing where the bare name answers means bare names from
  then on; real tmux keeps `=name` / `=name:` (it matches by prefix otherwise)
- pty-attach.js and cc-update-all-helper.js use the same targets

client/src/pages/__tests__/__snapshots__/screens.snapshot.test.tsx.snap

@@ -7233,7 +7233,7 @@ exports[`screen snapshots > Settings — about 1`] = `
             <p
               class="text-[10px] text-status-warning/90 mt-1"
             >
-              UI build v2.5.6 (rebuild client to match)
+              UI build v2.5.7 (rebuild client to match)
             </p>
           </div>
           <div

openapi.yaml

@@ -3,7 +3,7 @@
 openapi: 3.0.3
 info:
   title: Agent Dashboard for Claude Code API
-  version: 2.5.6
+  version: 2.5.7
   description: HTTP API for real-time Claude Code session monitoring, agent lifecycle tracking, analytics, pricing, hooks ingestion, and workflow intelligence.
   contact:
     name: Nguyễn Ngọc Trí Vĩ

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "agenthub",
-  "version": "2.5.6",
+  "version": "2.5.7",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "agenthub",
-      "version": "2.5.6",
+      "version": "2.5.7",
       "hasInstallScript": true,
       "license": "UNLICENSED",
       "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "agenthub",
-  "version": "2.5.6",
+  "version": "2.5.7",
   "bin": {
     "agenthub": "bin/agenthub.js"
   },

scripts/cc-update-all-helper.js

@@ -29,6 +29,8 @@ const path = require("path");
 const { execFileSync, spawnSync } = require("child_process");
 // What a failed command printed — plugin-bootstrap.js says why on STDOUT.
 const { failureText } = require("./plugin-update-helper");
+// psmux (the Windows `tmux`) has no `=name:` targets; tmux.js knows which form.
+const { pane: paneTarget } = require("../server/lib/tmux");
 
 const [, , runtimeDirArg, planJson] = process.argv;
 
@@ -170,7 +172,7 @@ function reloadPanes() {
     try {
       paneCmd = execFileSync(
         "tmux",
-        ["display-message", "-p", "-t", `=${name}:`, "#{pane_current_command}"],
+        ["display-message", "-p", "-t", paneTarget(name), "#{pane_current_command}"],
         { encoding: "utf8", timeout: 15_000, stdio: ["ignore", "pipe", "pipe"] }
       ).trim();
     } catch {
@@ -190,8 +192,10 @@ function reloadPanes() {
         // Atomics.wait, not `sleep`: Windows has no sleep binary.
         if (!first) Atomics.wait(new Int32Array(new SharedArrayBuffer(4)), 0, 0, 1000);
         first = false;
-        execFileSync("tmux", ["send-keys", "-t", `=${name}:`, "-l", command], { timeout: 15_000 });
-        execFileSync("tmux", ["send-keys", "-t", `=${name}:`, "Enter"], { timeout: 15_000 });
+        execFileSync("tmux", ["send-keys", "-t", paneTarget(name), "-l", command], {
+          timeout: 15_000,
+        });
+        execFileSync("tmux", ["send-keys", "-t", paneTarget(name), "Enter"], { timeout: 15_000 });
       }
       reloaded.push(name);
     } catch {

server/__tests__/tmux.test.js

@@ -51,6 +51,36 @@ describe("tmux wrapper", () => {
     assert.deepEqual(calls[0], ["new-session", "-d", "-s", "agenthub-lane-1", "-c", "C:\\repo"]);
   });
 
+  it("names sessions bare on psmux, which has no `=name` targets, and keeps `=` on tmux", () => {
+    // psmux (the WinGet `tmux` on Windows) answers "no server running on
+    // session '=agenthub-lane-1'" for a session that is alive, so every
+    // `=` target read a live pane as gone.
+    const fake = (supportsExact) => {
+      const calls = [];
+      tmux.__setExecImpl(
+        (args) => {
+          calls.push(args);
+          if (args[0] === "list-sessions") return "agenthub-lane-1\n";
+          const t = args[args.indexOf("-t") + 1];
+          if (t && t.startsWith("=") && !supportsExact) throw new Error("no server running");
+          return "";
+        },
+        { exact: null }
+      );
+      return calls;
+    };
+
+    let calls = fake(false);
+    assert.equal(tmux.hasSession("agenthub-lane-1"), true);
+    tmux.enableMouse("agenthub-lane-1");
+    assert.ok(calls.some((c) => c[0] === "set-option" && c[2] === "agenthub-lane-1"));
+    assert.ok(!calls.some((c) => c[0] === "set-option" && c[2].startsWith("=")));
+
+    calls = fake(true);
+    tmux.enableMouse("agenthub-lane-1");
+    assert.ok(calls.some((c) => c[0] === "set-option" && c[2] === "=agenthub-lane-1:"));
+  });
+
   it("newSession builds the correct argv", () => {
     const calls = [];
     tmux.__setExecImpl((args) => {

server/lib/pty-attach.js

@@ -70,7 +70,7 @@ function attach(ws, runId, { cols, rows }) {
   } catch {
     /* session gone or tmux unavailable — attach below will surface that */
   }
-  const pty = spawnImpl(attachBinary(), ["attach-session", "-t", `=${runId}`], {
+  const pty = spawnImpl(attachBinary(), ["attach-session", "-t", tmux.session(runId)], {
     name: "xterm-256color",
     cols: cols || 80,
     rows: rows || 24,

server/lib/tmux.js

@@ -26,19 +26,58 @@ const { execFileSync } = require("node:child_process");
 const EXEC_OPTS = { encoding: "utf8", stdio: ["pipe", "pipe", "ignore"] };
 let execImpl = (args) => execFileSync("tmux", args, EXEC_OPTS);
 
-function __setExecImpl(fn) {
+// Whether this tmux takes `=name` targets: true for tmux itself, false for
+// psmux (the WinGet `tmux` on Windows), null until a live session has shown
+// which. A fake exec in a test is real tmux unless it says otherwise.
+let exactTargets = null;
+
+function __setExecImpl(fn, { exact = true } = {}) {
   execImpl = fn;
+  exactTargets = exact;
 }
 function __reset() {
   execImpl = (args) => execFileSync("tmux", args, EXEC_OPTS);
+  exactTargets = null;
+}
+
+/**
+ * Probe once, on a session that exists: `=name` failing where the bare name
+ * answers means this tmux has no exact-match syntax (psmux answers
+ * "no server running on session '=name'"), so every target there is the bare
+ * name. Until a session exists to ask, tmux's own syntax.
+ */
+function exact() {
+  if (exactTargets !== null) return exactTargets;
+  let first;
+  try {
+    first = String(execImpl(["list-sessions", "-F", "#{session_name}"]))
+      .split("\n")
+      .map((x) => x.trim())
+      .find(Boolean);
+  } catch {
+    return true;
+  }
+  if (!first) return true;
+  const answers = (t) => {
+    try {
+      execImpl(["has-session", "-t", t]);
+      return true;
+    } catch {
+      return false;
+    }
+  };
+  if (answers(`=${first}`)) exactTargets = true;
+  else if (answers(first)) exactTargets = false;
+  return exactTargets ?? true;
 }
 
 // tmux resolves a bare `-t agenthub-lane-1` by PREFIX when no exact match
 // exists, so it would hit `agenthub-lane-12` once lane 1's session is gone —
 // and killSession would kill the wrong lane. `=` forces an exact match; pane
 // and option targets need the trailing `:` (tmux 3.4 rejects `=name` there).
-const session = (name) => `=${name}`;
-const pane = (name) => `=${name}:`;
+// psmux has neither form and names a session by its bare name.
+const session = (name) => (exact() ? `=${name}` : name);
+const pane = (name) => (exact() ? `=${name}:` : name);
 
 function hasSession(name) {
   try {
@@ -247,6 +286,8 @@ function serverVersion() {
 }
 
 module.exports = {
+  session,
+  pane,
   hasSession,
   newSession,
   enableMouse,