Alert on tmux output while its terminal is unfocused

tmux only raises an activity flag for windows that are not currently
selected, so a long-running command in the window you left selected --
the common case, since you switch away by moving your Hyprland focus
elsewhere rather than by selecting another tmux window -- finished
silently and the indicator never lit.

Windows now also count as waiting when they are selected in an attached
client, every client showing them is unfocused, and their window_activity
is newer than an @omarchy_unfocused_activity watermark. The watermark is
stamped by a new `track` subcommand wired to client-focus-in/out and the
existing select-window hooks, so it records where attention last was.
The hooks pass #{window_id} and #{window_activity} as arguments, which
tmux expands when the hook fires; run-shell -b would otherwise let output
arriving during the handoff be swallowed by the new watermark. The focus
hooks take index 100 to leave a user's own bindings alone.

That state has no hook of its own, so it needs polling to be noticed.
The probe therefore moves out of the indicator and into a service plugin,
alongside nightlight and battery. A bar surface exists per monitor and
each one instantiates every indicator twice, once per block, so a timer
on the indicator meant a shell-out per instance per tick -- four probe
processes every three seconds on a two-monitor machine, forever. One
service polls for the whole shell instead.

Sharing the state also fixes what per-instance polling would have papered
over: each indicator used to own its own count, so a timer-driven update
only refreshed the bar it ran on and left the other monitors stale.
Refreshes still arrive over the existing indicator broadcast, which now
coalesces into a single run no matter how many bars relay it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018CC9kSQv8ZEogaxDoeKBzL

bin/omarchy-tmux-alert

@@ -8,24 +8,43 @@ set -e
 
 # Session names cannot contain colons, and window names can, so they always
 # come last when parsed.
-WINDOW_FORMAT='#{window_bell_flag}#{window_activity_flag}#{window_silence_flag}:#{session_name}:#{window_index}:#{window_name}'
+WINDOW_FORMAT='#{window_id}:#{window_bell_flag}#{window_activity_flag}#{window_silence_flag}:#{window_activity}:#{@omarchy_unfocused_activity}:#{session_name}:#{window_index}:#{window_name}'
+CLIENT_FORMAT='#{client_flags}:#{window_id}'
 
 usage() {
   echo "Usage: omarchy-tmux-alert <show [--json]|focus>" >&2
   exit 1
 }
 
-# Windows tmux has flagged with a bell, activity, or silence alert, which is the
-# same state that highlights the window in the tmux status bar.
+# Include tmux alert flags plus output newer than the last focus transition for
+# selected windows whose attached terminals are all unfocused.
 alerted_windows() {
-  local flags session index name
+  local client_flags window_id flags activity seen_activity session index name
+  local waiting
+  local -A attached_windows=()
+  local -A focused_windows=()
 
-  tmux list-windows -a -F "$WINDOW_FORMAT" 2>/dev/null |
-    while IFS=':' read -r flags session index name; do
-      if [[ $flags == *1* ]]; then
-        printf '%s:%s:%s\n' "$session" "$index" "$name"
-      fi
-    done
+  while IFS=':' read -r client_flags window_id; do
+    [[ -n $window_id ]] || continue
+    attached_windows[$window_id]=1
+    if [[ ,$client_flags, == *",focused,"* ]]; then
+      focused_windows[$window_id]=1
+    fi
+  done < <(tmux list-clients -F "$CLIENT_FORMAT" 2>/dev/null)
+
+  while IFS=':' read -r window_id flags activity seen_activity session index name; do
+    waiting=0
+    [[ $flags == *1* ]] && waiting=1
+
+    if [[ ${attached_windows[$window_id]:-} == "1" &&
+        ${focused_windows[$window_id]:-} != "1" &&
+        $activity =~ ^[0-9]+$ &&
+        $seen_activity =~ ^[0-9]+$ ]] && ((activity > seen_activity)); then
+      waiting=1
+    fi
+
+    ((waiting)) && printf '%s:%s:%s\n' "$session" "$index" "$name"
+  done < <(tmux list-windows -a -F "$WINDOW_FORMAT" 2>/dev/null)
 }
 
 show() {
@@ -73,6 +92,14 @@ most_recent_client() {
   tmux list-clients "$@" -F '#{client_activity}:#{client_tty}:#{client_pid}' 2>/dev/null | sort -rn | head -n1
 }
 
+track() {
+  local window=${1:-} activity=${2:-}
+
+  [[ $window =~ ^@[0-9]+$ && $activity =~ ^[0-9]+$ ]] || return 0
+  tmux set-option -wq -t "$window" @omarchy_unfocused_activity "$activity" 2>/dev/null || return 0
+  omarchy-shell -q omarchy.indicators refresh
+}
+
 focus() {
   local target session index client tty pid
 
@@ -103,6 +130,10 @@ case "${1:-}" in
   focus)
     focus
     ;;
+  track)
+    shift
+    track "$@"
+    ;;
   *)
     usage
     ;;

config/tmux/tmux.conf

@@ -85,8 +85,10 @@ set -sg escape-time 10
 set-hook -g alert-bell 'run-shell -b "omarchy-shell -q omarchy.indicators refresh"'
 set-hook -g alert-activity 'run-shell -b "omarchy-shell -q omarchy.indicators refresh"'
 set-hook -g alert-silence 'run-shell -b "omarchy-shell -q omarchy.indicators refresh"'
-set-hook -g after-select-window 'run-shell -b "omarchy-shell -q omarchy.indicators refresh"'
-set-hook -g client-session-changed 'run-shell -b "omarchy-shell -q omarchy.indicators refresh"'
+set-hook -g after-select-window 'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'
+set-hook -g client-session-changed 'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'
+set-hook -g client-focus-out[100] 'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'
+set-hook -g client-focus-in[100] 'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'
 
 # Status bar
 set -g status-position top

migrations/1784955584.sh

@@ -0,0 +1,17 @@
+echo "Track tmux output while its terminal is unfocused"
+
+tmux_config="$HOME/.config/tmux/tmux.conf"
+
+if [[ -f $tmux_config ]] && ! grep -q 'client-focus-out\[100\].*omarchy-tmux-alert track' "$tmux_config"; then
+  sed -i \
+    -e 's|^set-hook -g after-select-window .*|set-hook -g after-select-window '"'"'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'"'"'|' \
+    -e 's|^set-hook -g client-session-changed .*|set-hook -g client-session-changed '"'"'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'"'"'|' \
+    "$tmux_config"
+
+  cat >>"$tmux_config" <<'EOF'
+set-hook -g client-focus-out[100] 'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'
+set-hook -g client-focus-in[100] 'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'
+EOF
+
+  omarchy-restart-tmux
+fi

shell/plugins/bar/indicators/TmuxAlert.qml

@@ -1,41 +1,23 @@
 import QtQuick
 import Quickshell
-import Quickshell.Io
 import qs.Ui
 
 BarIndicator {
   id: root
 
-  property int waitingCount: 0
-  property string tooltip: ""
-  property bool refreshPending: false
+  readonly property var tmuxService: bar?.shell?.firstPartyServiceFor("omarchy.tmux")
 
-  active: waitingCount > 0
+  active: tmuxService ? tmuxService.waiting : false
   activeText: "󰆍"
   inactiveText: "󰆍"
-  activeTooltipText: tooltip
+  activeTooltipText: tmuxService ? tmuxService.tooltip : ""
   inactiveTooltipText: "No Terminal Waiting"
 
+  // The service owns the probe and its polling; the tmux hooks still reach it
+  // through the indicator host's refresh broadcast, which coalesces into a
+  // single run no matter how many bars relay it.
   function refresh() {
-    if (statusProc.running) refreshPending = true
-    else statusProc.running = true
-  }
-
-  function update(raw) {
-    var data = extractData(raw)
-    waitingCount = Number(data.count || 0)
-    tooltip = String(data.tooltip || "")
-  }
-
-  Component.onCompleted: refresh()
-
-  // Alerts can also disappear without a hook, such as when the window or its
-  // session is killed while still flagged.
-  Timer {
-    interval: 5000
-    running: root.active
-    repeat: true
-    onTriggered: root.refresh()
+    if (root.tmuxService) root.tmuxService.refresh()
   }
 
   SequentialAnimation {
@@ -58,26 +40,6 @@ BarIndicator {
     function onRefreshRequested() { root.refresh() }
   }
 
-  Process {
-    id: statusProc
-    command: ["omarchy-tmux-alert", "show", "--json"]
-    stdout: StdioCollector {
-      waitForEnd: true
-      onStreamFinished: root.update(text)
-    }
-    onExited: function(exitCode) {
-      if (exitCode !== 0) {
-        root.waitingCount = 0
-        root.tooltip = ""
-      }
-
-      if (root.refreshPending) {
-        root.refreshPending = false
-        root.refresh()
-      }
-    }
-  }
-
   onPressed: function() {
     Quickshell.execDetached(["omarchy-tmux-alert", "focus"])
   }

shell/plugins/services/tmux/Service.qml

@@ -0,0 +1,60 @@
+import QtQuick
+import Quickshell.Io
+import "TmuxModel.js" as TmuxModel
+
+Item {
+  id: root
+
+  // Injected by omarchy-shell (the first-party service loader).
+  property var shell: null
+
+  property int waitingCount: 0
+  property string tooltip: ""
+  property bool refreshPending: false
+
+  readonly property bool waiting: waitingCount > 0
+
+  // A bar surface exists per monitor and each one instantiates the indicator
+  // twice (active and inactive block), so the probe lives here instead: one
+  // process for the whole shell, and every indicator reads the same answer.
+  function refresh() {
+    if (statusProc.running) refreshPending = true
+    else statusProc.running = true
+  }
+
+  // tmux hooks cover the flag transitions, but output in a selected window
+  // whose terminal sits on another workspace never fires one, and neither does
+  // a window or session killed while it was still flagged.
+  Timer {
+    interval: 3000
+    running: true
+    repeat: true
+    onTriggered: root.refresh()
+  }
+
+  Process {
+    id: statusProc
+    command: ["omarchy-tmux-alert", "show", "--json"]
+    stdout: StdioCollector {
+      waitForEnd: true
+      onStreamFinished: {
+        var waiting = TmuxModel.waitingFromOutput(text)
+        root.waitingCount = waiting.count
+        root.tooltip = waiting.tooltip
+      }
+    }
+    onExited: function(exitCode) {
+      if (exitCode !== 0) {
+        root.waitingCount = 0
+        root.tooltip = ""
+      }
+
+      if (root.refreshPending) {
+        root.refreshPending = false
+        root.refresh()
+      }
+    }
+  }
+
+  Component.onCompleted: refresh()
+}

shell/plugins/services/tmux/TmuxModel.js

@@ -0,0 +1,29 @@
+// Shape of `omarchy-tmux-alert show --json`. The command emits one JSON object
+// on the last line; anything tmux or a shell profile printed before it is
+// ignored so a noisy environment cannot blank the indicator.
+function waitingFromOutput(output) {
+  var text = String(output === undefined || output === null ? "" : output).trim()
+  if (!text) return { count: 0, tooltip: "" }
+
+  var lines = text.split("\n")
+  var data
+  try {
+    data = JSON.parse(lines[lines.length - 1])
+  } catch (e) {
+    return { count: 0, tooltip: "" }
+  }
+
+  if (!data || typeof data !== "object") return { count: 0, tooltip: "" }
+
+  var count = Number(data.count)
+  return {
+    count: isFinite(count) && count > 0 ? Math.floor(count) : 0,
+    tooltip: data.tooltip === undefined || data.tooltip === null ? "" : String(data.tooltip)
+  }
+}
+
+if (typeof module !== "undefined") {
+  module.exports = {
+    waitingFromOutput: waitingFromOutput
+  }
+}

shell/plugins/services/tmux/manifest.json

@@ -0,0 +1,14 @@
+{
+  "schemaVersion": 1,
+  "id": "omarchy.tmux",
+  "name": "Tmux",
+  "version": "1.0.0",
+  "author": "Omarchy",
+  "description": "Owns the set of tmux windows waiting for attention for the bar indicator.",
+  "kinds": [
+    "service"
+  ],
+  "entryPoints": {
+    "service": "Service.qml"
+  }
+}

test/shell.d/tmux-alert-test.sh

@@ -6,6 +6,19 @@ source "$(dirname "$0")/base-test.sh"
 
 require_command jq
 
+run_node_test <<'JS'
+const tmux = requireFromRoot('shell/plugins/services/tmux/TmuxModel.js')
+
+assertEqual(tmux.waitingFromOutput('{"count":2,"tooltip":"claude (Work:2)"}').count, 2, 'tmux model reads the waiting count')
+assertEqual(tmux.waitingFromOutput('{"count":2,"tooltip":"claude (Work:2)"}').tooltip, 'claude (Work:2)', 'tmux model reads the tooltip')
+assertEqual(tmux.waitingFromOutput('shell noise\n{"count":1,"tooltip":"editor (Work:1)"}').count, 1, 'tmux model ignores output before the json line')
+assertEqual(tmux.waitingFromOutput('').count, 0, 'tmux model treats empty output as nothing waiting')
+assertEqual(tmux.waitingFromOutput('not json').count, 0, 'tmux model treats unparseable output as nothing waiting')
+assertEqual(tmux.waitingFromOutput('not json').tooltip, '', 'tmux model blanks the tooltip on unparseable output')
+assertEqual(tmux.waitingFromOutput('{"count":-3}').count, 0, 'tmux model clamps a negative count')
+assertEqual(tmux.waitingFromOutput('{"tooltip":"editor (Work:1)"}').count, 0, 'tmux model defaults a missing count')
+JS
+
 test_dir=$(mktemp -d)
 trap 'rm -rf "$test_dir"' EXIT
 
@@ -14,18 +27,32 @@ cat >"$test_dir/tmux" <<'STUB'
 
 if [[ $1 == "list-windows" ]]; then
   cat "$TMUX_STUB_WINDOWS"
+elif [[ $1 == "list-clients" ]]; then
+  cat "$TMUX_STUB_CLIENTS"
+elif [[ $1 == "set-option" ]]; then
+  printf '%s\n' "$*" >>"$TMUX_STUB_CALLS"
 fi
 STUB
 chmod +x "$test_dir/tmux"
 
+cat >"$test_dir/omarchy-shell" <<'STUB'
+#!/bin/bash
+
+printf '%s\n' "$*" >>"$TMUX_STUB_CALLS"
+STUB
+chmod +x "$test_dir/omarchy-shell"
+
 export TMUX_STUB_WINDOWS="$test_dir/windows"
+export TMUX_STUB_CLIENTS="$test_dir/clients"
+export TMUX_STUB_CALLS="$test_dir/calls"
 export PATH="$test_dir:$PATH"
 
 cat >"$TMUX_STUB_WINDOWS" <<'WINDOWS'
-000:Work:1:editor
-100:Work:2:claude
-001:Side|Gig:1:server: still going
+@1:000:100::Work:1:editor
+@2:100:110::Work:2:claude
+@3:001:120::Side|Gig:1:server: still going
 WINDOWS
+: >"$TMUX_STUB_CLIENTS"
 
 output=$("$ROOT/bin/omarchy-tmux-alert" show --json)
 expected='{"count":2,"tooltip":"claude (Work:2), server: still going (Side|Gig:1)"}'
@@ -37,7 +64,31 @@ output=$("$ROOT/bin/omarchy-tmux-alert" show)
 pass "tmux alert describes alerted windows"
 
 cat >"$TMUX_STUB_WINDOWS" <<'WINDOWS'
-000:Work:1:editor
+@1:000:200:100:Work:1:editor
+WINDOWS
+echo 'attached,UTF-8:@1' >"$TMUX_STUB_CLIENTS"
+
+output=$("$ROOT/bin/omarchy-tmux-alert" show --json)
+expected='{"count":1,"tooltip":"editor (Work:1)"}'
+[[ $output == "$expected" ]] || fail "tmux alert reports output in an unfocused active window" "expected: $expected"$'\n'"actual:   $output"
+pass "tmux alert reports output in an unfocused active window"
+
+echo 'attached,focused,UTF-8:@1' >"$TMUX_STUB_CLIENTS"
+output=$("$ROOT/bin/omarchy-tmux-alert" show --json)
+[[ $output == '{"count":0,"tooltip":""}' ]] || fail "tmux alert ignores output in a focused active window" "$output"
+pass "tmux alert ignores output in a focused active window"
+
+cat >"$TMUX_STUB_CLIENTS" <<'CLIENTS'
+attached,UTF-8:@1
+attached,focused,UTF-8:@1
+CLIENTS
+output=$("$ROOT/bin/omarchy-tmux-alert" show --json)
+[[ $output == '{"count":0,"tooltip":""}' ]] || fail "tmux alert ignores a window visible in another focused client" "$output"
+pass "tmux alert ignores a window visible in another focused client"
+
+echo 'attached,UTF-8:@1' >"$TMUX_STUB_CLIENTS"
+cat >"$TMUX_STUB_WINDOWS" <<'WINDOWS'
+@1:000:200:200:Work:1:editor
 WINDOWS
 
 output=$("$ROOT/bin/omarchy-tmux-alert" show --json)
@@ -48,6 +99,19 @@ pass "tmux alert reports no alerted windows"
 pass "tmux alert stays quiet without alerts"
 
 : >"$TMUX_STUB_WINDOWS"
+: >"$TMUX_STUB_CLIENTS"
 output=$("$ROOT/bin/omarchy-tmux-alert" show --json)
 [[ $output == '{"count":0,"tooltip":""}' ]] || fail "tmux alert handles a missing tmux server" "$output"
 pass "tmux alert handles a missing tmux server"
+
+: >"$TMUX_STUB_CALLS"
+"$ROOT/bin/omarchy-tmux-alert" track @3 345
+expected=$'set-option -wq -t @3 @omarchy_unfocused_activity 345\n-q omarchy.indicators refresh'
+output=$(cat "$TMUX_STUB_CALLS")
+[[ $output == "$expected" ]] || fail "tmux alert records the activity watermark and refreshes indicators" "expected: $expected"$'\n'"actual:   $output"
+pass "tmux alert records the activity watermark and refreshes indicators"
+
+: >"$TMUX_STUB_CALLS"
+"$ROOT/bin/omarchy-tmux-alert" track invalid nope
+[[ ! -s $TMUX_STUB_CALLS ]] || fail "tmux alert ignores invalid tracking arguments" "$(cat "$TMUX_STUB_CALLS")"
+pass "tmux alert ignores invalid tracking arguments"

test/shell.d/tmux-hidden-activity-migration-test.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "$(dirname "$0")/base-test.sh"
+
+migration="$ROOT/migrations/1784955584.sh"
+test_dir=$(mktemp -d)
+trap 'rm -rf "$test_dir"' EXIT
+
+mkdir -p "$test_dir/home/.config/tmux" "$test_dir/bin"
+
+cat >"$test_dir/home/.config/tmux/tmux.conf" <<'EOF'
+# Alerts
+set-hook -g alert-bell 'run-shell -b "omarchy-shell -q omarchy.indicators refresh"'
+set-hook -g after-select-window 'run-shell -b "omarchy-shell -q omarchy.indicators refresh"'
+set-hook -g client-session-changed 'run-shell -b "omarchy-shell -q omarchy.indicators refresh"'
+set-hook -g client-focus-out[42] 'display-message "custom focus hook"'
+EOF
+
+cat >"$test_dir/bin/omarchy-restart-tmux" <<'EOF'
+#!/bin/bash
+
+echo restart >>"$TMUX_MIGRATION_RESTART_LOG"
+EOF
+chmod +x "$test_dir/bin/omarchy-restart-tmux"
+
+export TMUX_MIGRATION_RESTART_LOG="$test_dir/restarts"
+tmux_config="$test_dir/home/.config/tmux/tmux.conf"
+
+HOME="$test_dir/home" PATH="$test_dir/bin:$PATH" bash -euo pipefail "$migration" >/dev/null
+
+grep -Fq 'after-select-window '"'"'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'"'" "$tmux_config" ||
+  fail "tmux activity migration tracks newly selected windows"
+grep -Fq 'client-session-changed '"'"'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'"'" "$tmux_config" ||
+  fail "tmux activity migration tracks session changes"
+grep -Fq 'client-focus-out[100] '"'"'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'"'" "$tmux_config" ||
+  fail "tmux activity migration tracks terminal focus loss"
+grep -Fq 'client-focus-in[100] '"'"'run-shell -b "omarchy-tmux-alert track #{window_id} #{window_activity}"'"'" "$tmux_config" ||
+  fail "tmux activity migration tracks terminal focus gain"
+grep -Fq 'client-focus-out[42] '"'"'display-message "custom focus hook"'"'" "$tmux_config" ||
+  fail "tmux activity migration preserves custom indexed focus hooks"
+restart_count=$(wc -l <"$TMUX_MIGRATION_RESTART_LOG")
+((restart_count == 1)) || fail "tmux activity migration reloads tmux once"
+pass "tmux activity migration installs focus-aware hooks"
+
+before=$(sha256sum "$tmux_config")
+HOME="$test_dir/home" PATH="$test_dir/bin:$PATH" bash -euo pipefail "$migration" >/dev/null
+after=$(sha256sum "$tmux_config")
+
+[[ $before == "$after" ]] || fail "tmux activity migration is idempotent"
+restart_count=$(wc -l <"$TMUX_MIGRATION_RESTART_LOG")
+((restart_count == 1)) || fail "idempotent tmux activity migration does not reload tmux"
+pass "tmux activity migration is idempotent"