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Prompt to Prepare a Shopping Cart from a Recipe Photo

The author reports that Grok Bot receives a recipe photo, organizes the ingredients and quantities, and creates a shopping list by excluding ingredients already available at home.

Grok Bot
Life & Hobbies

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Dev

Creating a Free PDF Editing App as an Alternative to Acrobat

The author reports developing a PDF editing app over two days using Claude Code and releasing it on the Microsoft Store and for browsers.

Claude Code

How it works

  1. The author states that they first decided on the feature list and technologies in the Claude project. Claude suggested, instead of building a new renderer, to use PDFium, Chrome's PDF engine.
  2. Claude Code reportedly wrote a TypeScript web app, a Tauri desktop version without network permissions, GitHub Actions to create installation files, and automated browser tests.
  3. If there were errors during empty releases or deployment stages, the author would paste error messages or screenshots and have them fixed. Store screenshots and the introduction video were also created by running scripts on the actual app.

Results

The author reports that the app was published on the Microsoft Store and for browsers, and that features like form filling, signing, annotation, merging, compression, and redaction can be used without a paid tier. No figures such as user numbers were disclosed.

Notes

The author stated this was an experiment before their main project and is currently accepting bug reports.

Source

Reddit Original post ↗

Example prompt · Claude Code

Please create a PDF editing app that can be used on my computer and in the browser.

Input: Usage environment [operating system], required features first [form filling/signing/annotation/merging, etc.], test PDF [file]. Before building all features at once, define the scope of the first version and check the current project structure.

Check the public documentation for EmbedPDF using PDFium to set up rendering and implement a TypeScript web app. After completing the selected editing features, connect desktop execution with Tauri. Files should be processed locally, and the result PDF should be saved separately without overwriting the original.

Use Playwright to test opening, editing, saving, and reopening files. Verify with actual result files that signatures and annotations are preserved after saving, and display the reason for unsupported PDFs. Separate the process of creating installation files by target operating system.

Deliverables: app source code, instructions for running and building, sample test results, and remaining limitations. If store posting or distribution is needed, organize the required accounts and signing settings, and report separately on file creation and actual posting.