sway-browser-vnc

Recipe card from the charly-selkies plugin (Images — the deployable catalog).

sway-browser-vnc

Minimal Sway desktop with VNC (wayvnc on port 5900) and Chrome (CDP on port 9222).

Box Properties

Property	Value
Base	fedora
Candies	agent-forwarding, sway-desktop-vnc, dbus, charly
Ports	5900, 9222, 9224

Quick Start

charly box build sway-browser-vnc
charly start sway-browser-vnc
charly status sway-browser-vnc          # Shows all probes: supervisord, cdp, dbus, charly, sway, vnc, wl
charly check live sway-browser-vnc --filter vnc   # run the candy's vnc: status / screenshot steps
charly check live sway-browser-vnc --filter wl    # desktop screenshot via the wl: screenshot step

D-Bus and Notification Support

This box includes the dbus candy (D-Bus session bus) plus the charly candy, enabling:

• the dbus: check verb (notify/list/call/introspect) — D-Bus interaction served out-of-process by candy/plugin-dbus, driving the session bus with gdbus
• charly cmd — single command execution with desktop notification on completion
• charly agent terminal — typed persistent TTY sessions, input, snapshots, and transcripts
• charly status — supervisord, dbus, and charly probes

# author dbus: steps in the plan, run with: charly check live sway-browser-vnc --filter dbus
notify-build-done:
    check: a desktop notification is delivered
    dbus: notify
    context: [deploy]
    text: Build Complete
    description: Image built successfully
list-services:
    check: the notifications service is on the session bus
    dbus: list
    context: [deploy]
    stdout:
        contains: org.freedesktop.Notifications

charly cmd sway-browser-vnc "make test"    # Notifies on completion (gdbus, host-side)

The notification daemon (swaync) is included via the sway-desktop metalayer.

Overlays

Fullscreen overlays for recording (via wl-overlay, included in sway-desktop):

# author overlay steps in the plan, run with: charly check live sway-browser-vnc --filter wl
show-title:
    check: a fullscreen title card is shown
    wl: overlay-show
    context: [deploy]
    type: text
    text: INTRO
    name: title
show-lower-third:
    check: a lower-third is shown
    wl: overlay-show
    context: [deploy]
    type: lower-third
    text: Speaker
    subtitle: Role
    name: lt
show-countdown:
    check: a 3-second countdown is shown
    wl: overlay-show
    context: [deploy]
    type: countdown
    seconds: 3
    name: cd
show-highlight:
    check: a highlight region is shown
    wl: overlay-show
    context: [deploy]
    type: highlight
    region: "430,290,510,50"
    name: hl
show-fade:
    check: a fade-to-black outro is shown
    wl: overlay-show
    context: [deploy]
    type: fade
    color: black
    name: outro
hide-all:
    check: all overlays are hidden
    wl: overlay-hide
    context: [deploy]
    all: true

All overlay types render with true RGBA compositor transparency. See /charly-check:wl-overlay for the full recording workflow.

Recording

Desktop video recording via wf-recorder (included in sway-desktop) is authored as record: plan steps (the declarative verb served out-of-process by candy/plugin-record) and run with charly check live sway-browser-vnc --filter record:

sway-rec-start:
    check: a desktop recording starts
    record: start
    context: [deploy]
    record_name: demo
    record_mode: desktop
sway-rec-stop:
    check: the desktop recording is captured
    record: stop
    context: [deploy]
    record_name: demo
    artifact: demo.mp4

Use as Selkies Remote Desktop Client

sway-browser-vnc can act as a test client for selkies-desktop, simulating how a real user would connect via browser:

# Both containers must be running on the charly bridge network
charly start sway-browser-vnc
charly start selkies-desktop

# Open selkies URL in sway-browser-vnc's Chrome via a cdp: open step
# (the cdp: verb is served out-of-process by candy/plugin-cdp):
#   cdp: open  url: https://charly-selkies-desktop:3000
# Run with: charly check live sway-browser-vnc --filter cdp

# Interact with the remote desktop:
# Mouse: cdp: spa-click on the Selkies tab (with ~0.82x coordinate scaling)
# Keyboard: a vnc: type step (passthrough via SPA's overlayInput)
# Screenshots: a vnc: screenshot step (shows full client desktop with stream)
#              a cdp: screenshot step (shows only the stream content)

Key limitations when using as a client:

• Super key consumed by sway (can’t trigger remote labwc keybinds like Super+e)
• Ctrl+T/W consumed by local Chrome (open/close tabs locally, not remotely)
• Clipboard permission dialog appears on first connection — dismiss with a vnc: key step (key: Return) or CDP Browser.grantPermissions

See /charly-selkies:selkies-labwc for detailed SPA interaction documentation.

Test Coverage

Latest charly check live sway-browser-vnc run: 84 passed, 0 failed, 1 skipped (chrome-devtools-mcp-port references ${HOST_PORT:9224} which isn’t mapped here — correct skip behavior).

Covers all 19 transitive candies: wayvnc (VNC), sway (compositor), chrome-sway, xdg-portal, waybar, swaync, pavucontrol, thunar, xfce4-terminal, pipewire, wl-screenshot-grim, wl-overlay, wf-recorder, desktop-fonts, fastfetch, asciinema, tmux, dbus, charly. Deploy-scope: VNC port 5900 reachable, Chrome CDP on port 9250→9222 with /json/version 200. Box-scope: sway + wayvnc both RUNNING under supervisord.

Related Skills

• /charly-selkies:sway-desktop-vnc, /charly-selkies:sway, /charly-selkies:wayvnc, /charly-selkies:chrome-sway, /charly-selkies:xdg-portal, /charly-infrastructure:dbus-layer, /charly-tools:charly, /charly-distros:agent-forwarding
• /charly-check:check — declarative testing framework (parent router for the out-of-process live-container check verbs wl:/cdp:/vnc:/mcp:/dbus:)
• /charly-check:vnc — VNC automation on this box
• /charly-check:cdp — Chrome automation (CDP on host port 9250)
• /charly-check:wl — Wayland input/windows/clipboard (sway subgroup for compositor control)
• /charly-check:dbus — the dbus: check verb (notifications/list/call/introspect, served out-of-process by candy/plugin-dbus)
• /charly-build:charly-mcp-cmd — the box inherits 2 deploy-scope mcp: checks from the chrome-devtools-mcp candy (ping + list-tools asserting navigate_page/take_screenshot). charly check live sway-browser-vnc --filter mcp runs them; note the port-publishing gotcha — if your charly.yml has an explicit port: override that predates chrome-devtools-mcp, port 9224 may not be published. See /charly-build:charly-mcp-cmd for the fix.

Related Boxes

• selkies-desktop — browser-accessible remote desktop (can be accessed from sway-browser-vnc’s Chrome)

Related

• /charly-image:image — image family umbrella (candy: image entries — those carrying base:/from: — in charly.yml, build/validate/inspect/list)
• /charly-build:build — the embedded build vocabulary (distros, builders, init-systems)