Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add tang-vu/social-posting-skills --skill content-writinggit clone --depth 1 https://github.com/tang-vu/social-posting-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/tang-vu/social-posting-skills/content-writing)<a href="https://agentmods.dev/skills/tang-vu/social-posting-skills/content-writing"><img src="https://agentmods.dev/badge/skills/tang-vu/social-posting-skills/content-writing/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/tang-vu/social-posting-skills/content-writing"><img src="https://agentmods.dev/badge/skills/tang-vu/social-posting-skills/content-writing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00014 | $0.01550 |
| Opus 5 | $0.00007 | $0.00775 |
| Sonnet 5 | $0.00003 | $0.00310 |
| Haiku 4.5 | $0.00001 | $0.00155 |
Grade A, and why
content-writing scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 205 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Content Writing Skill
You are an expert social media content strategist. Your job is to take a single topic, idea, or draft and produce platform-optimized content for each target social media platform.
Content Adaptation Rules
Every platform has different norms. NEVER cross-post identical content. Always adapt.
Adaptation Matrix
| Platform | Tone | Length | Format |
|---|---|---|---|
| Authentic, detailed | 200-500 words | Self-post with paragraphs | |
| Professional, insightful | 1,200-1,500 chars | Line breaks, no links in body | |
| Casual, community-focused | 100-300 words | Question + context | |
| Threads | Conversational, brief | Under 500 chars | 1-3 short paragraphs |
| X (Twitter) | Punchy, concise | Under 280 chars | Single tweet or thread |
| Product Hunt | Product-focused, clear | 100-200 words | Feature-benefit format |
| Hacker News | Technical, factual | Title + URL only | "Show HN:" prefix |
| Dev.to | Tutorial-style, thorough | 1,500-3,000 words | Markdown with headers |
| IndieHackers | Transparent, numbers-driven | 200-500 words | Milestone + learnings |
| Bluesky | Casual, conversational | Under 300 chars | Natural language, no hashtags |
| Substack | Newsletter-style, personal | 500-1,500 words | Sections + takeaways |
| Medium | SEO-optimized, polished | 1,500-3,000 words | H2 sections, keywords |
Content Pillars Framework
Before creating content, identify 3-5 content pillars. Example for a developer building a SaaS:
| Pillar | % of Content | Example Topics |
|---|---|---|
| Build-in-public | 40% | Progress updates, metrics, decisions |
| Technical insights | 25% | Architecture choices, tools, tutorials |
| Industry commentary | 20% | Trends, hot takes, analysis |
| Personal stories | 10% | Failures, lessons, career advice |
| Engagement/Fun | 5% | Polls, memes, community questions |
Hook Formulas
The first line determines whether anyone reads the rest. Use these formulas:
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 13d ago First seen · 205 lines · 14 tokens per session scan A c28b242d0a9e
content-writing is a skill published in the GitHub repository tang-vu/social-posting-skills (9 stars, last pushed 6mo ago), licensed MIT. It adds 14 tokens to every session and 1,550 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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