overthinkos/niri
ov-selkies/skills/niri/SKILL.md
Niri Wayland compositor (Smithay-based) built from source with virtual output support. Use when working with niri compositor, headless Wayland, or Smithay-based desktop containers.
data-ai
Updated May 5, 2026
$ install --global
skillsauthnpx skillsauth add overthinkos/overthink-plugins niriInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: May 5, 2026, 7:16 AM213.2s1 file scanned
SKILL.md
- name:
- niri
- description:
- |
niri -- Headless Smithay Wayland compositor
Layer Properties
| Property | Value |
|----------|-------|
| Dependencies | dbus, rust, build-toolchain |
| Service | niri (supervisord, priority 10) |
| Install files | tasks:, config.kdl, niri-wrapper |
| Built from | QaidVoid/niri feat/virtual branch (Smithay + virtual outputs) |
Environment Variables
| Variable | Value |
|----------|-------|
| WAYLAND_DISPLAY | wayland-1 |
| XDG_RUNTIME_DIR | /tmp |
| XDG_CURRENT_DESKTOP | niri |
| EGL_LOG_LEVEL | fatal |
Note: Niri/Smithay creates wayland-1 (not wayland-0 like wlroots). All downstream services must use wayland-1.
Build From Source
Niri is built from the QaidVoid/niri fork (feat/virtual branch) which adds:
NIRI_BACKEND=headlessmode — creates virtual outputs without DRM/KMSniri msg create-virtual-output— dynamic virtual output creation- Timer-based vblank simulation for proper frame pacing
Build process (in tasks:):
git clone --depth 1 --branch feat/virtual https://github.com/QaidVoid/niri.gitcargo build --release- Install binary to
/usr/local/bin/niri - Clean up build deps to reduce image size
Headless Mode
The niri-wrapper starts niri with NIRI_BACKEND=headless:
- Creates
HEADLESS-1virtual output automatically (1920x1080@60Hz) - No GPU-specific env vars needed (unlike sway which needs 4 NVIDIA vars +
--unsupported-gpu) - No
cap_sys_nicestripping needed (niri is a Rust binary, no file capabilities) - No
WLR_BACKENDScoordination needed
Differences from Sway
| Aspect | Sway (wlroots) | Niri (Smithay) |
|--------|----------------|----------------|
| Headless mode | WLR_BACKENDS=headless | NIRI_BACKEND=headless |
| Socket name | wayland-0 | wayland-1 |
| GPU workarounds | 4 env vars + --unsupported-gpu | None needed |
| File capabilities | cap_sys_nice must be stripped | No file caps |
| IPC | sway-ipc socket | niri IPC socket |
| Config format | i3-style | KDL |
| Screen capture | wlr-screencopy | ext-image-copy-capture (pending) |
Known Limitation: Screen Capture
Niri does not implement the wlr-screencopy protocol (it's wlroots-specific). The ext-image-copy-capture protocol support is pending.
Used In Images
Part of niri-desktop composition.
Related Layers
/ov-selkies:sway-- wlroots compositor alternative/ov-foundation:dbus-- D-Bus session bus dependency/ov-selkies:chrome-niri-- Chrome browser on Niri/ov-selkies:niri-apps-- Desktop apps (terminal, file manager)/ov-selkies:niri-desktop-- Full desktop composition
When to Use This Skill
Use when the user asks about:
- Niri compositor configuration
- Smithay-based Wayland setup
- Headless virtual output support
- Alternative to Sway for containers
- Building niri from source
Related
/ov-build:layer— layer authoring reference (layer.ymlschema, task verbs, service declarations)/ov-build:eval— declarative testing (tests:block,ov eval image,ov test)
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