pdf-editor-compdf（PDF editor compdf 开发）

PDF Editor — PDF Document Processing CLI Tool

Platform Detection (Agent must execute automatically)

Before running any CLI command, the Agent must automatically detect the platform (read env.platform: win32→Windows, darwin→Mac; or run uname -s). Do NOT ask the user about their platform.

{skill_root} = the absolute path of the directory containing this SKILL.md.

CLI Download & Installation (Required on first use)

The CLI binary is not included in the Skill package. It is downloaded from the official ComPDFKit distribution server (download.compdf.com) operated by PDF Technologies, Inc. The Agent must complete the following steps before the first execution:

1. Check whether <CLI> exists → skip if it does
2. Inform the user that the CLI binary will be downloaded from download.compdf.com (official ComPDFKit CDN)
3. Download the appropriate archive for the platform:

- [Windows]: https://download.compdf.com/skills/winCLI/win.zip - [Mac]: https://download.compdf.com/skills/macCLI/mac.zip

1. Extract the archive to the {skill_root}/scripts/ directory (the zip already contains a win/ or mac/ prefix, so the correct directory structure is formed automatically after extraction)
2. [Mac] After extraction, run: chmod +x {skill_root}/scripts/mac/compdf_cli
3. Verify: run <CLI> --help to confirm the binary is executable

Download is performed once on first use only; no re-download is needed on subsequent runs.

License Activation (Required on first use)

1. Check whether <LICENSE_PATH> exists → skip if it does
2. Ask the user for their email address (explain: the email is sent to the official ComPDFKit license server to obtain a free trial license; no other data is transmitted)
3. After the user confirms, send POST https://wms.compdf.com/api/license/skillsTrial, Body: <LICENSE_API_BODY>

- code=200: write the data.license XML to <LICENSE_PATH> - code=500: prompt the user to retry with a different email address

1. Run <CLI> --help to verify activation

Common Options

The following options apply to all commands (they are not repeated in individual command references):

Command Reference

split — Split PDF

<CLI> split <input.pdf> [options]

Output naming: all → {original_filename}_page_{page_number}.pdf; range → {original_filename}_pages_{start}-{end}.pdf

merge — Merge PDFs

<CLI> merge <file1.pdf> <file2.pdf> [file3.pdf ...] [options]

Encrypted PDFs are skipped automatically; if fewer than 2 unencrypted files remain, the command fails.

extract — Extract Pages

<CLI> extract <input.pdf> --range <range> [options]

rotate — Rotate Pages

<CLI> rotate <input.pdf> --pages <range> --angle <90|180|270> [options]

delete — Delete Pages

<CLI> delete <input.pdf> --pages <range> [options]

insert — Insert Pages/Images

<CLI> insert <target.pdf> --source <source.pdf> --pages <range> --at <position> [options]
<CLI> insert <target.pdf> --image <imagePath> --at <position> --width <width> --height <height> [options]

convert — Standard Format Conversion

<CLI> convert <input.pdf> --standard <format> [options]

--language supported values: Win en-US/zh-CN/ja-JP/ko-KR/fr-FR/de-DE | Mac en/zh/ja/ko

Examples:

<CLI> convert "report.pdf" --standard pdfa-1a --overwrite
<CLI> convert "report.pdf" --standard pdfua-1 --title "My Document" --language zh-CN --overwrite

optimize — Document Optimization & Compression

<CLI> optimize <input.pdf> [options]

Default behavior: removes unused/empty objects and enables Flate compression. Image compression is only enabled when --compress-images or image-related parameters are explicitly passed.

Examples:

<CLI> optimize "report.pdf" --overwrite
<CLI> optimize "report.pdf" --compress-images --image-quality 55 --target-ppi 144 --overwrite

compare — Overlay Document Comparison

<CLI> compare <old.pdf> <new.pdf> [options]

watermark-text — Add Text Watermark

<CLI> watermark-text <input.pdf> --text <content> [options]

watermark-image — Add Image Watermark

<CLI> watermark-image <input.pdf> --image <image_path> [options]

Shared Watermark Options

⚠️ Mac: --full-screen is not enabled by default; tiled watermarks must be passed explicitly.

Examples — [Windows]:

<CLI> watermark-text "report.pdf" --text "CONFIDENTIAL" --overwrite
<CLI> watermark-image "report.pdf" --image "logo.png" --scale 0.5 --opacity 100 --overwrite

Examples — [Mac]:

<CLI> watermark-text "report.pdf" --text "CONFIDENTIAL" --full-screen --overwrite
<CLI> watermark-image "report.pdf" --image "logo.png" --scale 0.5 --opacity 0.3 --full-screen --overwrite

watermark-delete — Remove All Watermarks

<CLI> watermark-delete <input.pdf> [options]

[Win] DeleteWatermarks() removes all watermarks; [Mac] iterates and removes one by one. Selective removal is not supported.

Exit Codes

Usage Patterns (Agent quick reference)

⚠️ Mac watermark commands require --full-screen to be passed explicitly (when tiling is desired).

Limitations

1. Page ranges only support "N" or "N-M"; comma-separated values are not supported
2. Except for merge (which skips encrypted files automatically), encrypted PDFs will cause an error and exit
3. Wildcards, output path equal to input path, and multi-threaded parallel execution are not supported
4. Results of standard format conversion and optimization depend on the content of the input PDF
5. watermark-delete removes all watermarks; selective removal is not supported
6. compare performs visual overlay comparison and does not output a structured diff list

Troubleshooting

Security & Privacy

All PDF processing is performed locally. No file content is uploaded.

• Official Source: Both endpoints are operated by PDF Technologies, Inc. (a KDAN Company), the publisher of ComPDFKit SDK.
• No Telemetry: The CLI does not collect usage statistics, crash reports, or any anonymous data.
• No Network Dependency: After initial setup, all commands run fully offline without accessing any external services.
• License File: The license_key_windows.xml / license_key_mac.xml generated after activation is stored only in the local scripts/ directory.

Copyright & License

This Skill is built on the ComPDFKit SDK. © 2014-2026 PDF Technologies, Inc., a KDAN Company. All Rights Reserved.

• License file: License.txt | Terms of Service: https://www.compdf.com/terms-of-service
• Privacy Policy: https://www.compdf.com/privacy-policy | Commercial Licensing: https://www.compdf.com/contact-sales