ClawHub

Universal Watermarker

v2.0.0

Adds customizable text watermarks with adjustable opacity and layout to PDFs and images, saving results with wm_ prefix in the original folder.

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by@cribug
MIT-0
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LicenseMIT-0 · Free to use, modify, and redistribute. No attribution required.
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medium confidence
✓
Purpose & Capability
Name, description, SKILL.md, requirements.txt, and main.py all align: the code implements text watermarks for images and PDFs and saves outputs with a prefix in the original folder.
✓
Instruction Scope
SKILL.md keeps scope to watermarking behavior (modes, parameters, and confirming output paths). It does not instruct reading unrelated system files or requiring unrelated credentials.
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Install Mechanism
There is no install spec (instruction-only from registry), but main.py will at runtime fetch a font from raw.githubusercontent.com into ./fonts. Using raw.githubusercontent.com is a common, generally acceptable pattern for static assets, but it is an external network fetch and should be noted.
✓
Credentials
The skill requests no environment variables or credentials. The code shown does not access secrets or unrelated system config; its write access is limited to creating a ./fonts folder and writing output files next to inputs.
✓
Persistence & Privilege
Skill is not always-enabled, does not request persistent system-wide privileges, and does not modify other skills' configs. Its file writes are confined to fonts/ and the original file directories.
Assessment
This skill appears to do what it claims (watermark images/PDFs). Before installing: 1) Review the complete main.py (the provided excerpt is truncated) to confirm there are no additional network endpoints or unexpected behavior. 2) Note it will download a font at first run from https://raw.githubusercontent.com — verify that URL and the font license are acceptable for you. 3) Install dependencies (pypdf, reportlab, Pillow) in an isolated virtualenv or sandbox and run tests on non-sensitive files first. 4) Confirm output naming/paths (wm_ prefix, saved next to originals) are acceptable and that no unrelated files are modified. If you cannot review the full source, run it in a restricted environment or decline installation.

Like a lobster shell, security has layers — review code before you run it.

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License

MIT-0
Free to use, modify, and redistribute. No attribution required.
Termshttps://spdx.org/licenses/MIT-0.html

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