PDF Watermark

Add watermarks & stamps (pdf-watermark)

Add watermarks & stamps

Part of the Universal PDF Management & Creation Skill Repository. Category: PDF Management. Every skill is individually callable (INDIVIDUAL MODE) and may also be invoked automatically by the orchestrator (SYSTEM MODE).

When to use

Protect or mark pages with text/image watermarks and stamps.

Operations

• diagonal text watermark (arbitrary angle)
• image watermark
• opacity
• page selection
• stamp overlays (APPROVED/CONFIDENTIAL)

Engine (what actually executes this)

universal_pdf/core.annotate:add_watermark / add_stamp

All heavy lifting is done on disk / one page at a time by the shared engine — never by loading the document into an LLM context.

Tools & graceful degradation

• Preferred tool: reportlab overlay + PyMuPDF stamping
• Fallback: —

If the preferred backend is unavailable the skill transparently uses the fallback or reports a documented limitation. It never reports success when an operation did not actually happen.

Validation (this skill attaches checks to its Outcome)

page_count preserved; overlay renders

Related skills

pdf-header-footer, pdf-annotate, pdf-orchestrate

Example requests it handles

• "Watermark every page with 'CONFIDENTIAL'."
• "Stamp page 1 with APPROVED."

Notes

Provenance: outputs cite their source page/section where relevant.