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# dingger
macOS agent watcher for tmux panes: herdr's agent panel, without herdr.
dingger watches every pane in your tmux server, detects which AI coding agent
runs in each (claude, codex, pi, gemini, and 19 others), tracks herdr's five
statuses, and tells you which agents are waiting for you: in the menu bar, in
the tmux status line, and with a notification and a sound.
dingger owns no terminals. It is a client of your tmux server. The detection
engine and rule manifests are extracted from
[herdr](https://github.com/herdrdev/herdr) (Apache-2.0).
## Statuses (herdr's, verbatim)
| status | meaning | symbol | color | priority |
|---------|--------------------------------------------------|--------|--------|----------|
| blocked | needs your input | `×` | red | 4 |
| done | finished a turn while you were looking elsewhere | `✓` | teal | 3 |
| working | turn in flight | `◐` | yellow | 2 |
| idle | at its prompt, nothing new since you looked | `○` | green | 1 |
The state machine is herdr's `apply_pane_state_change` and
`mark_active_tab_seen`, implemented as one pure function (`watcher::advance`)
and unit-tested against herdr's own test cases:
- a turn that finishes while you look at another window becomes **done**;
- a turn that finishes in the window you are looking at stays **idle**;
- looking at a window (a tmux window is herdr's tab) turns its done agents
**idle**, as does jumping to one from the menu bar or status line;
- an agent seen for the first time is **idle**, not done.
dingger watches tmux focus through tmux hooks, so attendance updates the
moment you switch windows; agent reports apply in order, so a turn shorter
than a poll is still a completion.
## Surfaces
- **Menu bar** (`menubar/main.swift`): `×1 ✓3 ◐2` in herdr's colors; the
menu lists every agent in priority order, oldest waiting first. Clicking a
row jumps to that pane.
- **Floating panel** (`menubar/panel.swift`): an always-on-top HUD that never
takes focus, on every Space and over full-screen apps. It lists the agents
waiting for you (blocked, done) and summarizes the rest
(`◐ 2 working · ○ 15 idle`); click a row to jump there, drag to move it.
**⌃⌥⌘E** (or "Show Panel" in the menu) turns it on or off; off stays off
until you turn it back on. While on, "Panel Shows" picks *Only When Agents
Are Waiting* (default: it hides itself while nothing waits; turning it on
then shows it for 3 seconds so you see it is armed; compact) or *Always*
(with a "Show all / Show less" toggle for the full list). The panel is
always dark, in herdr's palette, so it reads the same over any desktop.
- **Jump shortcut**: **⌃⌥⌘U** jumps to the top waiting agent from anywhere,
like clicking the tmux status line.
- **Agent search**: **⌃⌥⇧⌘U** opens a Spotlight-style search over every
agent. Type to fuzzy-filter (each word must match, letters in order, the
name, session, window, harness, status, or directory); ↑↓ or ⌃N ⌃P / ⌃J ⌃K
select, ↩ or a click jumps, esc closes, ⌃U clears. With nothing typed,
agents are in the menu's order, so ↩ jumps to the top waiting agent. It
takes the keyboard without activating dingger, so focus returns where it
was.
- **Restore**: dingger saves your tmux layout as it changes (sessions,
windows, panes, layouts, directories) under
`~/.local/state/dingger/snapshots/`. After a crash, shutdown, or
`kill-server`, `dingger restore` brings back what is missing (`--dry-run`
to preview, `--list` for saved snapshots, `--session` for some). Sessions
that exist are left alone, except a bare one of the same name (what a
terminal creates on startup), which is replaced with its clients moved
over. Agents are resumed in their own sessions: pi with `pi --session
<file>` (reported by the pi extension), Claude Code with `claude --resume
<id>` (reported by its SessionStart hook, `dingger install claude`), in
the directory they ran in. A session that never got a message has nothing
to resume, so its command line is typed instead. Agents that were
mid-turn are listed. Other panes get the command line that was running typed at the
prompt, not run: exactly as typed with the zsh hook (`dingger install
zsh`, then source the file it names from your `.zshrc`), otherwise the
program's arguments. An agent or program that exits within a minute
before tmux stops (a shutdown) is still restored.
When tmux stops, the panel (first row: "↺ Restore 9 sessions · 22
agents", or "Not now"), the menu (all, or one session at a time), and the
status line (`↺9`, clickable) offer the restore; it runs through your
login shell, like a terminal starting tmux, and a notification
summarizes (full report: `~/.local/state/dingger/restore.log`).
- All shortcuts live in `~/.config/dingger/config.toml` (menu bar,
Settings…), reloaded on save.
- **Jumping to an agent** (any click, a shortcut, search) shows it in a
terminal window and raises that window. With several terminal windows,
one already on the agent's session wins (it shows the agent without
switching), then the focused one, then the one used last. In Ghostty
(1.3+), the exact window, tab, and split is raised: dingger learns which
terminal holds each tmux client when it gains focus (tmux's focus hook
asks Ghostty which terminal is focused; nothing visible changes).
Other terminals: the app is activated.
- **tmux status line** (`packaging/tmux/dingger.tmux`): the same summary after
the clock. Clicking it jumps to the top waiting agent (the menu's top row),
skipping the window you already look at.
- **Notifications**: "needs attention" (blocked) and "finished" (done), with
herdr's sounds; silent for completions you are already watching.
## Where state comes from
1. **Agent hooks** (authoritative): `dingger install pi` installs a pi
extension that reports working/blocked/idle over
`~/.local/state/dingger/agent.sock`. Restart running pi agents to load it.
`dingger install claude` adds a SessionStart hook to
`~/.claude/settings.json` (keeping everything else; the original is
backed up to `settings.json.bak-dingger`) that reports only Claude's
session, for restore; its state comes from screen matching.
2. **Screen matching** (fallback): `capture-pane` text through herdr's
manifests, for agents without hooks.
All per-pane state lives in tmux pane options (`@agent_state`,
`@dingger_since`, `@dingger_hook`), so restarting dingger loses nothing.
## Usage
```bash
dingger watch # the daemon (run by launchd, see below)
dingger status # agents in priority order
dingger focus [--pane ID] # jump to an agent (default: the top waiter)
dingger install pi # install the pi state-reporting extension
dingger install claude # report Claude Code sessions, for restore
dingger install zsh # record typed command lines, for restore
dingger manifests update # refresh manifests from herdr's catalog
```
## Install
```bash
cargo build --release
cp target/release/dingger ~/.local/bin/dingger # do not strip: invalidates
codesign --force --sign - ~/.local/bin/dingger # the signature, macOS kills it
swiftc -O -o target/dingger-menu menubar/*.swift # menu bar + panel, bundled
# as ~/Applications/dingger.app
```
- launchd agents (start at login, restart on exit):
`packaging/launchd/dev.dingger.{dingger,menubar}.plist`; adjust the user
path, copy to `~/Library/LaunchAgents/`, `launchctl bootstrap gui/$(id -u) <plist>`.
- tmux: `source-file /path/to/dingger/packaging/tmux/dingger.tmux` (needs
`set -g mouse on` for the click).
dingger does not need tmux running first; it attaches when a server appears.
## Testing
```bash
cargo test # engine tests + herdr state-machine tests
tests/e2e.sh # end to end against an isolated tmux server
tests/pi-live.sh <pi> # a real pi binary against dingger (new pi releases)
```
`tests/e2e.sh` starts its own tmux server, its own daemon (polling only every
30 s, so everything asserted must arrive through events), fake agents driven
over the hook protocol, and a real tmux client whose focus it controls. It
asserts every status transition, attendance by navigation, both click paths
(including the real menu bar binary), the floating panel's visibility and
layout rules and content (compact, full, toggle), agent search (matching,
ranking, selection), the status-line segment, latency with a
deliberately slow notifier, and state surviving a daemon restart. It never
touches your tmux server.
`tests/pi-live.sh <pi binary>` checks a real pi release on a tmux server and
daemon of its own, with a fake local model (`tests/fake-model.py`) and its
own pi agent directory: no network, no credentials, your pi untouched. It
covers identification, the extension's state and session reports, a turn,
`/reload`, an extension's blocked event, screen detection without the
extension, restore, and exit. To try a release without installing it:
`npm install --prefix /tmp/pi-next @earendil-works/pi-coding-agent@<version>`
(through `sfw`), then `tests/pi-live.sh /tmp/pi-next/node_modules/.bin/pi`.
## Layout
- `crates/detect-core`: the detection engine and 22 manifests, from herdr.
- `crates/dinggerd`: the `dingger` binary (watcher, hooks, focus, CLI).
- `menubar/`: the menu bar app (`model.swift` rows and colors, `panel.swift`
the floating panel, `hotkey.swift` the global shortcut and settings).
- `packaging/`: launchd agents and the tmux snippet.
- `tests/e2e.sh`: the end-to-end suite; `tests/pi-live.sh`: a real pi.
|
