feat: add generic content and investor skills

skills/article-writing/SKILL.md

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+---
+name: article-writing
+description: Write articles, guides, blog posts, tutorials, newsletter issues, and other long-form content in a distinctive voice derived from supplied examples or brand guidance. Use when the user wants polished written content longer than a paragraph, especially when voice consistency, structure, and credibility matter.
+origin: ECC
+---
+
+# Article Writing
+
+Write long-form content that sounds like a real person or brand, not generic AI output.
+
+## When to Activate
+
+- drafting blog posts, essays, launch posts, guides, tutorials, or newsletter issues
+- turning notes, transcripts, or research into polished articles
+- matching an existing founder, operator, or brand voice from examples
+- tightening structure, pacing, and evidence in already-written long-form copy
+
+## Core Rules
+
+1. Lead with the concrete thing: example, output, anecdote, number, screenshot description, or code block.
+2. Explain after the example, not before.
+3. Prefer short, direct sentences over padded ones.
+4. Use specific numbers when available and sourced.
+5. Never invent biographical facts, company metrics, or customer evidence.
+
+## Voice Capture Workflow
+
+If the user wants a specific voice, collect one or more of:
+- published articles
+- newsletters
+- X / LinkedIn posts
+- docs or memos
+- a short style guide
+
+Then extract:
+- sentence length and rhythm
+- whether the voice is formal, conversational, or sharp
+- favored rhetorical devices such as parentheses, lists, fragments, or questions
+- tolerance for humor, opinion, and contrarian framing
+- formatting habits such as headers, bullets, code blocks, and pull quotes
+
+If no voice references are given, default to a direct, operator-style voice: concrete, practical, and low on hype.
+
+## Banned Patterns
+
+Delete and rewrite any of these:
+- generic openings like "In today's rapidly evolving landscape"
+- filler transitions such as "Moreover" and "Furthermore"
+- hype phrases like "game-changer", "cutting-edge", or "revolutionary"
+- vague claims without evidence
+- biography or credibility claims not backed by provided context
+
+## Writing Process
+
+1. Clarify the audience and purpose.
+2. Build a skeletal outline with one purpose per section.
+3. Start each section with evidence, example, or scene.
+4. Expand only where the next sentence earns its place.
+5. Remove anything that sounds templated or self-congratulatory.
+
+## Structure Guidance
+
+### Technical Guides
+- open with what the reader gets
+- use code or terminal examples in every major section
+- end with concrete takeaways, not a soft summary
+
+### Essays / Opinion Pieces
+- start with tension, contradiction, or a sharp observation
+- keep one argument thread per section
+- use examples that earn the opinion
+
+### Newsletters
+- keep the first screen strong
+- mix insight with updates, not diary filler
+- use clear section labels and easy skim structure
+
+## Quality Gate
+
+Before delivering:
+- verify factual claims against provided sources
+- remove filler and corporate language
+- confirm the voice matches the supplied examples
+- ensure every section adds new information
+- check formatting for the intended platform