install-deps

Install Dependencies

Two surfaces:

1. System binaries — required: ImageMagick, exiftool. Optional: libvips-tools, libheif-examples, oxipng, pngquant, jpegoptim, mozjpeg, libavif-bin, libjxl-tools, realesrgan-ncnn-vulkan, darktable-cli.
2. Python tools — imagehash, Pillow (perceptual dedupe). Installed into a plugin-owned uv venv at <data-dir>/venv/.

The plugin invokes Python via <data-dir>/venv/bin/python, so the user's system Python stays untouched and PEP 668 / externally-managed-environment errors never occur.

Resolve paths

PLUGIN_DATA_DIR="${CLAUDE_USER_DATA:-${XDG_DATA_HOME:-$HOME/.local/share}/claude-plugins}/image-production"
VENV_DIR="$PLUGIN_DATA_DIR/venv"

Procedure

1. Detect host

uname -s
which apt-get apt brew dnf pacman 2>/dev/null
which uv 2>/dev/null

Record what's available; this drives which install commands you propose.

2. Ensure uv is available

uv is the only hard prerequisite for the Python side. If missing, propose:

curl -LsSf https://astral.sh/uv/install.sh | sh

Ask before running. Fall back to system pip with --break-system-packages only if the user declines — prefer uv.

3. Walk the system-binary matrix

Tool	Detect	Required?	Install (apt)	Install (brew)
magick / convert / identify	which magick || which convert	required	sudo apt install imagemagick	brew install imagemagick
exiftool	which exiftool	required	sudo apt install libimage-exiftool-perl	brew install exiftool
fdupes	which fdupes	optional	sudo apt install fdupes	brew install fdupes
vips / vipsthumbnail	which vips	optional (recommended >500 images)	sudo apt install libvips-tools	brew install vips
heif-convert	which heif-convert	optional	sudo apt install libheif-examples	brew install libheif
oxipng	which oxipng	optional	sudo apt install oxipng	brew install oxipng
pngquant	which pngquant	optional	sudo apt install pngquant	brew install pngquant
jpegoptim	which jpegoptim	optional	sudo apt install jpegoptim	brew install jpegoptim
mozjpeg (cjpeg-mozjpeg)	which cjpeg-mozjpeg	optional	cargo install mozjpeg-cli (or binary)	brew install mozjpeg
avifenc	which avifenc	optional	sudo apt install libavif-bin	brew install libavif
cjxl / djxl	which cjxl	optional	sudo apt install libjxl-tools	brew install jpeg-xl
upscayl-bin	which upscayl-bin || ls /opt/Upscayl/resources/bin/upscayl-bin 2>/dev/null	optional	install Upscayl from https://upscayl.org (deb / flatpak / appimage)	install Upscayl from https://upscayl.org
realesrgan-ncnn-vulkan (fallback)	which realesrgan-ncnn-vulkan	optional	binary release from upstream	binary release from upstream
darktable-cli	which darktable-cli	optional	sudo apt install darktable (GUI + CLI)	brew install darktable
img2pdf	which img2pdf	optional	uv tool install img2pdf (or sudo apt install python3-img2pdf)	pipx install img2pdf

For each: if missing, stage the install command tagged required/optional. Required tools that are missing block the install — surface that clearly.

realesrgan-ncnn-vulkan and mozjpeg are not in apt — for those, point the user at the upstream releases page rather than auto-downloading. Ask before placing binaries under ~/bin/.

4. Provision the venv

If <VENV_DIR> doesn't exist:

uv venv "$VENV_DIR" --python 3.11

If it exists, leave it.

5. Install Python packages into the venv

Package	Required?	Used by
Pillow	required	dedupe (perceptual), inspection
imagehash	required	dedupe (perceptual)
numpy	required (Pillow/imagehash dep)	dedupe
cairosvg	optional	svg-to-raster (SVG → PNG/PDF). Needs system libcairo2 (preinstalled on most Linux/macOS).
vtracer	optional	vectorize (raster → SVG). Self-contained wheel (bundled Rust binary).

Stage:

source "$VENV_DIR/bin/activate"
uv pip install Pillow imagehash numpy
# Optional — only if user wants SVG conversion / vectorization:
uv pip install cairosvg vtracer

If cairosvg import fails at runtime with a libcairo error, prompt the user to install the system lib: sudo apt install libcairo2 (Linux) / brew install cairo (macOS).

6. Verify

After installs, re-run the detect commands and report a green/red status table per tool. Surface install commands the user still needs to run themselves (sudo, cargo).

Output

Single status report:

• Required system bins: present / missing.
• Optional system bins: present / missing (with one-line reason to install each).
• Venv: provisioned at <VENV_DIR>, Python <version>.
• Python packages: installed.

Refuse to mark "OK" if any required tool is missing.