gimp

Apply one operation across a folder of images using GIMP's headless console — resize, crop, format-convert, flatten, watermark, etc. Use when the user wants to bulk-process images and ImageMagick alone isn't enough (e.g. needs a GIMP-only filter or PSD/XCF support).

Convert a single image (XCF, PSD, PNG, JPG, TIFF, WebP, etc.) to another format via GIMP headless. Use when the user wants to export a GIMP-native file to a web format, or when format support outside GIMP is missing.

Reference for the GIMP command-line interface — non-interactive batch mode, Script-Fu invocation, console binary, and the differences between GIMP 2.10 and GIMP 3.0. Read this before authoring batch ops or Script-Fu calls.

Install a GIMP-side plugin (Script-Fu .scm, Python-Fu .py, or compiled binary) into the user's GIMP config directory so it appears in the GIMP menu next launch. Use when the user wants to add a third-party GIMP filter or extension.

List every Script-Fu, Python-Fu, and binary plugin currently installed in the user's GIMP config directory, including version (where derivable) and whether it lives in the user dir or system dir. Use when the user asks "what plugins do I have", or before installing one to check for duplicates.

First-run setup for the GIMP plugin. Detects how GIMP is installed on the user's Linux machine (native package, Flatpak, Snap, AppImage), captures version and CLI binary path, and persists a profile to $CLAUDE_USER_DATA so the other skills can shell out without re-detecting. Use the first time the plugin is invoked, after a GIMP upgrade, or whenever skills report a stale path.

Execute an arbitrary Script-Fu expression (or a .scm file) against the user's GIMP install in headless mode, using the binary path stored by onboard. Use when the user asks to run a Script-Fu snippet, debug a script, or test PDB calls.

Re-probe the local GIMP install and update the saved profile if version, binary path, or install type has changed. Use after `apt upgrade`, `flatpak update`, `snap refresh`, replacing an AppImage, or when another skill reports a stale binary.