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watermarks-remover
Agent skill + stdlib Python service to strip multi-vendor AI provenance marks from text and files — for privacy and hygiene on content you own. The skill is a thin client: it drives the machinery over HTTP, so the agent host needs no Python.
| Layer | Target | How |
|---|---|---|
| A | Invisible Unicode, exotic spaces, bidi, tag chars | Deterministic Python scripts |
| B | Statistical (token-sampling) text watermarks | Agent rewrite + optional rewrite_text.py hook |
| Files | C2PA / EXIF / XMP / doc props | PNG, JPEG, WebP, AVIF, HEIC, BMP, GIF, TIFF, SVG, PDF, DOCX, XLSX, PPTX, EPUB, ODT, HTML, Markdown, MP4/MOV/M4A/M4V, WAV, MP3, FLAC |
Vendors / ecosystems (class-level): Claude, Gemini / SynthID-Text, OpenAI provenance surfaces, open-LLM Kirchenbauer-style (green-list) and keyed-Gumbel / EXP (Aaronson) marks.
Latest release: v0.5.0
Skill path: skills/remove-ai-marks/
Service path: service/
(migration: formerly remove-claude-marks; slash alias /remove-claude-marks still documented)
Install (agent skill)
The skill ships no code — it calls the service over HTTP. Install the skill (markdown only) and start the service, then set WATERMARKS_SERVICE_URL if it is not http://127.0.0.1:8765.
In Claude Code, the fastest route is the bundled plugin marketplace — no clone, and it updates in place. Everywhere else, one installer covers every supported host (Python 3.10+ stdlib, no dependencies):
python3 install_skill.py --skill remove-ai-marks --target claude-code
| Host | Target | Lands in |
|---|---|---|
| Claude Code (personal) | --target claude-code |
~/.claude/skills/<skill> (honors CLAUDE_CONFIG_DIR) |
| Claude Code (project) | --target claude-project --project-dir PATH |
PATH/.claude/skills/<skill> |
| Cowork, claude.ai, cloud sessions, routines | --target cowork |
dist/<skill>.zip to upload under Customize → Skills |
| Cursor | --target cursor (default) |
~/.cursor/skills/<skill> |
Shipped skills: remove-ai-marks (full, service-backed) and
clean-user-facing-text (text only, self-contained). --list prints them.
Existing installations are preserved unless you pass --force; replacement is
staged first and the previous install is kept as a uniquely named backup.
--link symlinks this checkout instead of copying, so edits are picked up
live. On Windows, use py install_skill.py ...; the install-skill.sh wrapper
is provided for macOS/Linux shells.
Before writing anything, the installer validates the skill against the
Agent Skills packaging rules that claude.ai uploads
and the Skills API enforce: spec-only frontmatter (name, description,
license, compatibility, metadata, allowed-tools), a lowercase hyphenated
name of at most 64 characters matching t