The latest articles on DEV Community by Florentin Badea (@florentin_badea). https://dev.to/florentin_badea https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3948041%2Fb69049a6-b977-4157-9634-d3fab9658a92.jpg https://dev.to/florentin_badea en Florentin Badea Wed, 01 Jul 2026 14:38:44 +0000 https://dev.to/florentin_badea/stop-your-ai-assistant-from-hallucinating-pdf-apis-selectpdf-ai-tools-39nb https://dev.to/florentin_badea/stop-your-ai-assistant-from-hallucinating-pdf-apis-selectpdf-ai-tools-39nb <p>AI coding assistants are great at .NET boilerplate, but ask one to generate PDF code and it will happily invent a method that doesn't exist, or reach for a commercial feature while claiming it's in the free edition. The model is guessing from training data.</p> <p><a href="https://github.com/selectpdf/ai-tools" rel="noopener noreferrer">SelectPdf AI Tools</a> fixes that. It's a free, open-source (MIT) set of <strong>Agent Skills</strong> that give your assistant accurate, version-matched knowledge of the <a href="https://selectpdf.com/pdf-library-for-net/" rel="noopener noreferrer">SelectPdf .NET library</a> — real API signatures, working code, and the gotchas that matter.</p> <h3> What's in it </h3> <p>A single Claude Code plugin with two skills:</p> <ul> <li> <strong><code>selectpdf-lib-net</code></strong> — the full commercial <a href="https://selectpdf.com/pdf-library-for-net/" rel="noopener noreferrer">Select.Pdf library</a>: HTML→PDF, building/editing PDFs, merge/split, AcroForms, digital signatures, encryption, PDF→text/image, and accessible tagged PDF/UA-1 and PDF/A-3.</li> <li> <strong><code>selectpdf-lib-htmltopdf-net</code></strong> — the free <a href="https://selectpdf.com/community-edition/" rel="noopener noreferrer">Community Edition</a> (HTML→PDF).</li> </ul> <p>Every sample is in <strong>C# and VB.NET</strong>, tracking SelectPdf v26.3.</p> <h3> Install in Claude Code </h3> <div class="highlight js-code-highlight"> <pre class="highlight plaintext"><code>/plugin marketplace add selectpdf/ai-tools /plugin install selectpdf@selectpdf </code></pre> </div> <p>The right skill activates automatically when you ask it to work with PDFs in a .NET project.</p> <h3> Cursor, Copilot, Codex </h3> <p>The same knowledge ships in each tool's native format — Cursor <code>.mdc</code> rules, Copilot <code>.instructions.md</code>, and a Codex <code>AGENTS.md</code> guide. Drop the file into your repo and your assistant is up to speed.</p> <p>It's all open source, so you can read exactly what your assistant is being told — and send a PR if you spot something. 👉 <a href="https://github.com/selectpdf/ai-tools" rel="noopener noreferrer">https://github.com/selectpdf/ai-tools</a></p> <p>Want to see the library itself? Browse the <a href="https://selectpdf.com/pdf-library/" rel="noopener noreferrer">online documentation</a> or try the <a href="https://selectpdf.com/demo/" rel="noopener noreferrer">C# and VB.NET live demos</a>.</p> dotnet csharp ai pdf