Automated summary
This skill steers the agent to use the mochify.app `squish` tool to compress, convert, resize, crop, and rotate images.
Strengths
- Handles the common operations in one tool: compression, format conversion, resizing, cropping, and rotation.
- Includes a format recommendation table (avif/webp for web, png for transparency, jxl for maximum compression, jpg for compatibility).
- Applies sensible defaults: avif for photos, png for transparency, 1200px width for web optimisation.
- Instructs the agent to report the output path back to the user after processing.
Limitations
- Fully dependent on the `squish` tool and the external mochify.app API being available.
- Exposes no quality or compression-level parameter, only format and dimensions.
- Multi-file work is done through sequential calls, with no native batch processing.
Use it whenever a task involves compressing, converting, resizing, cropping, or rotating an image file.
Avoid it for advanced image editing (retouching, layers, background removal) or unsupported formats such as animated SVG or GIF.
Security analysis
SafeThe skill contains no executable code, no shell commands, no credential handling, and no obfuscation. It is pure natural-language instruction that maps user intent to documented parameters of a single image-processing tool. The only noteworthy aspect is that image data is sent to an external API, which is the stated purpose of the skill and clearly disclosed rather than hidden.
- •Processes local image files by uploading them to the third-party mochify.app service — disclosed openly in the description, but users should be aware files leave the local machine
- •No allowed-tools declared, so the `squish` tool's actual permissions/implementation cannot be verified from this file
Examples
Compress /Users/me/site/hero.jpg for the web — make it 1200px wide and as small as possible.Convert ./assets/photo.png to webp and put the result in ./assets/web/.Resize ./shots/profile.jpg to 400x400, crop it to exactly those dimensions, and rotate it 90 degrees.name: mochify
description: Use this skill whenever the user wants to compress, convert, resize, crop, or rotate images. Triggers on requests like "compress this image", "convert to WebP/AVIF/JXL", "resize to X pixels wide", "make this image smaller for the web", or any image optimisation task. Calls the mochify squish tool with the appropriate parameters.
Mochify — Image Compression & Conversion
Use the squish tool to process images via the mochify.app API.
Parameters
- file_path (required) — absolute path to the image file
- type — output format:
jpg,png,webp,avif,jxl - width — target width in pixels (height scales proportionally unless
heightis also set) - height — target height in pixels
- crop — set
trueto crop to exactwidth×heightrather than letterboxing - rotation — degrees:
0,90,180,270 - output_dir — directory to write the result (defaults to same directory as input)
Format guidance
| Goal | Recommended format |
|---|---|
| Web photos | avif or webp |
| Lossless / transparency | png |
| Maximum compression | jxl |
| Broad compatibility | jpg |
Tips
- If the user doesn't specify a format, default to
aviffor photos andpngfor images with transparency. - If the user says "resize" without a format, keep the original format.
- For "web-optimised" or "compress for web" requests, use
avifat the user's desired width (or 1200px if unspecified). - Multiple files can be processed in sequence with separate
squishcalls. - Always confirm the output path back to the user after processing.
From the file to a first result
The download contains exactly the content displayed on this page. This copy may differ from the latest version in the source repository.
View the source and supporting filesThis download contains SKILL.md only. Any scripts, references, templates and dependencies are not included. Get the required files from the source, preserving their directory structure, before continuing.
1. Download the file
Download SKILL.mdFrom the root of a test project, save the file as .skill-downloads/mochify-image-compression-conversion-mrx3y0sc/SKILL.md, or use the command below. This folder is for inspecting the skill before installation.
Command for macOS/Linux or WSL: requires a POSIX shell and curl. On Windows without WSL, use the download button and create the folder manually.
mkdir -p '.skill-downloads/mochify-image-compression-conversion-mrx3y0sc' && curl --fail --show-error --location 'https://skills-guides.com/api/skills/mochify-image-compression-conversion-mrx3y0sc/download' --output '.skill-downloads/mochify-image-compression-conversion-mrx3y0sc/SKILL.md.part' && mv '.skill-downloads/mochify-image-compression-conversion-mrx3y0sc/SKILL.md.part' '.skill-downloads/mochify-image-compression-conversion-mrx3y0sc/SKILL.md'2. Check prerequisites
Read SKILL.md before using it. If it references scripts or external services, inspect them and prepare the required access in your test environment.
No recognized prerequisites section in this file. This does not mean it is self-contained: libraries, tools and access requirements may be mentioned elsewhere in the content or source repository.
The platforms on this page are catalog indications. The paths below follow tool documentation; they do not prove this skill has been run in those tools. No minimum tool version is confirmed for this listing.
3. Load the skill
After inspection, copy the complete folder into your project using one of the commands below, then open a new tool session. The command stops if a folder with the same name already exists: compare the files before replacing it.
Claude Code
test -f '.skill-downloads/mochify-image-compression-conversion-mrx3y0sc/SKILL.md' && test -s '.skill-downloads/mochify-image-compression-conversion-mrx3y0sc/SKILL.md' && mkdir -p '.claude/skills' && test ! -e '.claude/skills/mochify' && cp -R '.skill-downloads/mochify-image-compression-conversion-mrx3y0sc' '.claude/skills/mochify'OpenSkills
OpenSkills must already be installed. The local install/read procedure is checked with OpenSkills 1.5.0, which requires Node.js ≥ 20.6.0. Catalog slugs are not resolved automatically.
Official OpenSkills installationopenskills install './.skill-downloads/mochify-image-compression-conversion-mrx3y0sc'openskills read 'mochify-image-compression-conversion-mrx3y0sc'Reading should display the installed file content and its base directory. It does not run the skill or install its dependencies.
For an agent that reads AGENTS.md, then sync the index. This command changes AGENTS.md: review the diff before using it.
openskills syncManual method or another tool: attach SKILL.md to a conversation, or open it in an agent that can read files. Include any required supporting resources. No universal folder is recognized by every tool.
4. Try a first task
Use a short, synthetic input: an API endpoint, a small document or an interface brief. In a new conversation, attach the file or give the agent its path, then adapt this request:
Read .skill-downloads/mochify-image-compression-conversion-mrx3y0sc/SKILL.md and apply its instructions to this example: [describe a test input]. Identify any missing files, dependencies or access. Produce the result requested by the skill without inventing data or running unreviewed scripts.Expected result: output matching the skill instructions, or a precise list of missing prerequisites. A read confirmation alone does not validate a first use. If an external resource is unavailable, that path remains untested.
Writing Fragments
Content
Mine raw writing fragments through a relentless interview, without imposing structure. Capture ideas, quotes, and leading words for later use.
UI Copywriting & Auditing
Content
Write or audit user-facing UI copy including buttons, errors, empty states, and tooltips across the monorepo, following the design system source of truth.
Music MIDI Extraction
Content
Extracts the MIDI or score from an existing music production via the CogMusic MCP tool and confirms availability.