Introduction¶

When processing batches of scanned documents, a common practice is to “send the entire PDF for OCR.” The consequence is that pages with an existing text layer are repeatedly re-recognized, resulting in time-consuming and costly operations; conversely, pages with incomplete text layers are treated as text pages and extracted directly, causing fields to be lost.

PDF Inspector is designed to solve this problem: it first reads the internal structure of the PDF and determines on a per-page basis whether a page is text-based or requires OCR. It is published on SkillHub by community developer user_1a99cb00, categorized under office-efficiency, version 1.0.0.

What is it?¶

One-sentence positioning: A PDF routing tool written in Rust. It takes a PDF as input and outputs a per-page disposition conclusion—text-based pages are extracted directly, while image-based pages are routed to OCR.

It does not perform OCR itself, nor does it handle the final content extraction; it only handles the step of “deciding which path to take.”

Publisher: user_1a99cb00 (community source, not maintained by an official team). The page metrics listed are 1.9M views, 8.1K stars, a rating of 100,000, and 2,027 downloads.

Core Features¶

1. Reads internal PDF structure: It examines the internal structure rather than just looking at the file extension or file size.
2. Per-page determination: It provides a judgment per page, not a single conclusion for the whole PDF. In mixed documents, it is very common for the first half to be text and the second half to be scanned pages.
3. Two-category result: The determination falls into two categories: Text-based (text can be extracted directly) or Needs OCR (content is within an image and must undergo recognition).
4. Implementation: Written in Rust, with parsing logic completed locally. The page annotation indicates that no API Key is required (requires_api_key=false).
5. Coordinates: @user_1a99cb00/pdf-inspector, classified as office-efficiency.

Installation & Activation¶

The retrieved materials do not provide installation commands, dependency lists, or configuration file fields, so no speculation is made here. The official addresses are as follows:

https://api.skillhub.cn/user_1a99cb00/pdf-inspector

SkillHub Page:

https://www.skillhub.cn/skills/user_1a99cb00/pdf-inspector

This type of Skill is based on the universal SKILL.md format. Once installed into the Agent’s Skill directory, it can be invoked. Please refer to the SkillHub page for specific directory locations and activation methods (the body of that page was not retrieved this time).

It should be noted that the materials do not distinguish installation differences between Cursor, Codex CLI, and Claude Code. Therefore, no differentiation is provided here to avoid writing unverified commands.

Typical Usage¶

The materials provided only positioning and capability descriptions, without reproducible command-line examples or invocation parameters. The following represents an invocation intent consistent with its positioning; parameter names should follow the official instructions:

Input: A mixed PDF (some pages with text layers, some pages as scanned images)

Process: Read internal structure page by page

Output: Judgment conclusion for each page — Text-based / Needs OCR

Routing based on judgment: Text-based pages extract text directly; pages needing OCR are sent to the OCR process

It is important to note that this Skill only produces routing conclusions. The subsequent text extraction and OCR recognition must be connected by the caller.

Use Cases & Considerations¶

Suitable scenarios:

1. Document libraries with mixed scanned copies and electronic drafts where you want to process pages via routing.
2. Saving OCR overhead by excluding pages with intact text layers from the recognition process.
3. Understanding document composition before batch processing to determine a recognition strategy.

Limitations and Pitfalls:

1. Version 1.0.0, community release; functional boundaries and future maintenance are unknown.
2. The page annotation categorizes it as office-efficiency; it is an efficiency tool, not an OCR engine itself.
3. The rating (100,000) and downloads (2,027) are current page display data and will change over time.
4. OCR capabilities are not included within the Skill; the accuracy of recognition results depends on the OCR service you connect.

Summary¶

The value of PDF Inspector lies in advancing the “should we OCR” judgment to before the processing flow, providing conclusions per page, and avoiding a one-size-fits-all approach for the entire document. If your document sources are mixed, it can help filter out text pages first.

Official Address: https://api.skillhub.cn/user_1a99cb00/pdf-inspector