# MatrixFounder > Open-source publisher. Listings imported from github.com/MatrixFounder — credited to the original author with their license. - **Listings:** 23 - **Total installs:** 0 - **Profile:** https://agentstack.voostack.com/s/matrixfounder - **Website:** https://github.com/MatrixFounder ## Published listings - [Vdd Adversarial](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-vdd-adversarial) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-vdd-adversarial` Use when performing Verification-Driven Development with adversarial approach. Actively challenge assumptions and find weak spots. - [Obsidian Cli](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-obsidian-cli) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-obsidian-cli` >- - [Pptx](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-pptx) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-pptx` Use when the user asks to create, edit, convert, preview, clean, or password-protect Microsoft PowerPoint .pptx presentations. Triggers include "markdown to pptx", "pptx to markdown", "slides from outline", "mermaid in slides", "pptx to pdf", "slide thumbnails", "drop orphan slides", "OCR slide images", "encrypt/decrypt pptx", and related presentation or OOXML round-trip tasks. - [Dummy Test Skill](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-dummy-test-skill) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-dummy-test-skill` Use when [TRIGGER: specific symptoms or situations]... - [Skill Auto Improve](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-skill-auto-improve) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-skill-auto-improve` Use when you want to automatically improve an artifact (a skill, prompt, command/workflow, or eval dataset) against a measurable metric — the orchestrator proposes one change at a time, scores it, and keeps it only if the metric improves, reverting otherwise. Vendor-agnostic (Anthropic / OpenAI / Gemini / local gateways). - [Skill Validator](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-skill-validator) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-skill-validator` Use when auditing a new or existing skill for security vulnerabilities, malware (bash scripts), and structural compliance. - [Brainstorming](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-brainstorming) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-brainstorming` Use when brainstorming ideas, exploring solutions, generating options, clarifying requirements, designing architecture, or answering open-ended "how should we" and "what are the options" questions — even without the word "brainstorm". - [Hooks Creator](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-hooks-creator) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-hooks-creator` Use when the user wants to customize Gemini CLI behavior using hooks (events, blockers, loggers). - [Transcript Fetcher](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-transcript-fetcher) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-transcript-fetcher` >- - [Mcp Builder](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-mcp-builder) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-mcp-builder` Guidelines for creating high-quality MCP (Model Context Protocol) servers. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK). - [Html](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-html) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-html` Use when fetching a web page/URL or converting a saved .html/.htm/.mhtml/.webarchive to clean Markdown — an Obsidian web-clipper and a universal HTML acquisition + HTML→Markdown step that also feeds the pdf and docx skills. Triggers include "html to markdown", "url to markdown", "download this page", "save the html", "web page to obsidian", "webarchive/mhtml to markdown", "clip this article". - [Wiki Ingest](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-wiki-ingest) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-wiki-ingest` >- - [Text Humanizer](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-text-humanizer) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-text-humanizer` Use when you need to humanize AI-generated text or generate untraceable system prompts. Supports multiple genres (Wiki, Creative, Crypto, etc.). - [Vdd Sarcastic](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-vdd-sarcastic) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-vdd-sarcastic` Use when performing VDD adversarial review with an opt-in sarcastic, provocative delivery style — a stylistic skin over vdd-adversarial mechanics (exhaustive reporting + objective bar). - [Marp Slide](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-marp-slide) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-marp-slide` Use when users request slide creation, presentations, or Marp documents. Creates professional Marp slides with 7 themes (default, minimal, colorful, dark, gradient, tech, business). Supports custom themes, image layouts, and "make it look good" requests. - [Skill Creator](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-skill-creator) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-skill-creator` Use when creating new Agent Skills, upgrading existing skills, running evals to test a skill, benchmarking skill performance, or optimizing a skill's description for better triggering accuracy. Guidelines for Gold Standard skill structures. - [Xlsx](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-xlsx) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-xlsx` Use when the user asks to create, transform, validate, chart, preview, or password-protect Microsoft Excel .xlsx workbooks. Triggers include "csv to xlsx", "recalculate this workbook", "scan formula errors", "add a chart to xlsx", "bar / line / pie chart over a range", "financial model in xlsx", "fix #REF errors", "preview xlsx as image", "encrypt / decrypt / password-protect an xlsx", and relate… - [Skill Enhancer](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-skill-enhancer) — Skill · Free — `agentstack add skill-matrixfounder-universal-skills-skill-enhancer` Use when you need to audit, fix, or improve an existing agent skill to meet Gold Standard compliance. - [Pdf](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-pdf) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-pdf` Use when the user asks to create, combine, split, preview, or extract content from PDF files. Triggers include "markdown to pdf", "mermaid in pdf", "math/LaTeX in pdf", "merge PDFs", "split a PDF", "extract text from pdf", "fill AcroForm", "preview pdf as image", and similar PDF generation or manipulation tasks. - [Post Writing](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-post-writing) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-post-writing` Use when the user asks to write, draft, or rewrite a post for social media (LinkedIn, Telegram, Blog) or wants content to be more engaging. - [Docx](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-docx) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-docx` Use when the user asks to create, edit, convert, validate, preview, or password-protect Microsoft Word .docx documents. Triggers include "markdown to docx", "docx to markdown", "fill Word template", "accept tracked changes", "validate docx", "preview docx as image", "encrypt/decrypt docx", and related .docx round-trip or template-fill tasks. - [Summarizing Meetings](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-summarizing-meetings) — Skill · Free — `agentstack add skill-matrixfounder-universal-skills-summarizing-meetings` >- - [Json Tidy](https://agentstack.voostack.com/l/skill-matrixfounder-universal-skills-test-skill-broken) — Skill · Free · security-reviewed — `agentstack add skill-matrixfounder-universal-skills-test-skill-broken` formats json --- Seller on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Install any with `agentstack add `.