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 gabrielmoreira/agent-skills-mirror --skill comparison-post-writergit clone --depth 1 https://github.com/gabrielmoreira/agent-skills-mirrorWrote 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/gabrielmoreira/agent-skills-mirror/comparison-post-writer)<a href="https://agentmods.dev/skills/gabrielmoreira/agent-skills-mirror/comparison-post-writer"><img src="https://agentmods.dev/badge/skills/gabrielmoreira/agent-skills-mirror/comparison-post-writer/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/gabrielmoreira/agent-skills-mirror/comparison-post-writer"><img src="https://agentmods.dev/badge/skills/gabrielmoreira/agent-skills-mirror/comparison-post-writer.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 | $0.00115 | $0.03523 |
| Opus 5 | $0.00057 | $0.01761 |
| Sonnet 5 | $0.00023 | $0.00705 |
| Haiku 4.5 | $0.00012 | $0.00352 |
Grade A, and why
comparison-post-writer 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 8d 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.
This is a copy
100% identical to comparison-post-writer — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 351 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Comparison Post Writer
Write high-converting "X vs Y" comparison blog posts that rank on Google and help readers make a confident buying decision. Each post includes a feature comparison table, individual product breakdowns, pros and cons, a clear winner recommendation, and affiliate CTAs placed at maximum-intent moments.
When to Use
- User wants to compare two or three competing products side by side
- User has two affiliate programs and wants a single article that covers both
- User says "vs", "versus", "compare", "which is better", "side by side"
- User wants to capture high-intent search traffic (X vs Y searches convert at 2-3x the rate of generic reviews)
- User has a product from S1 and wants to frame it against competitors
Workflow
Step 1: Identify Products to Compare
Parse the user's request for product names. You need a minimum of 2 and a maximum of 3 products.
If only 1 product is provided:
- Use
web_searchto find the top 1-2 competitors - Search:
"[product name] alternatives" OR "[product name] vs" site:g2.com OR site:capterra.com OR site:trustradius.com - Pick the competitors with the most head-to-head search volume
If 3+ products are provided:
- Keep all 3 if they are genuinely comparable
- If the user listed 4+, ask which 2-3 to focus on — more than 3 makes the comparison unwieldy
Affiliate priority: The user's affiliate product goes first (featured position). If both products have affiliate links, feature the higher-commission one in the "winner" slot unless the product genuinely loses on quality.
Step 2: Research Both Products
For each product, use web_search to gather:
- Pricing: starting price, tiers, free trial availability
- Key features: 8-12 features that matter to buyers
- Target audience: who uses this product and why
- Known weaknesses: common complaints on G2, Capterra, Reddit, or Trustpilot
- Unique differentiator: one thing this product does better than everyone else
- Search volume signal:
"[product A] vs [product B]"— check if autocomplete shows this is a real query
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 351 lines · 115 tokens per session scan A 4ffc20d115dd
comparison-post-writer is a skill published in the GitHub repository gabrielmoreira/agent-skills-mirror (17 stars, last pushed yesterday), licensed MIT. It adds 115 tokens to every session and 3,523 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to comparison-post-writer, differing in 0 lines, and is treated as a copy.
Other skills, from other repositories
comparison-post-writer
Write "X vs Y" comparison blog posts that help readers choose between two competing products. Triggers on: "write a comparison post", "X vs Y blog post", "compare [product A] and [product B]", "which is better [A] or [B]", "head to head comparison", "[product] vs [product] article", "comparison review", "write a…
comparison-post-writer
Write "X vs Y" comparison blog posts that help readers choose between two competing products. Triggers on: "write a comparison post", "X vs Y blog post", "compare [product A] and [product B]", "which is better [A] or [B]", "head to head comparison", "[product] vs [product] article", "comparison review", "write a…
affiliate-blog-builder
Write SEO-optimized affiliate blog articles, product reviews, comparison posts, listicles, and how-to guides. Triggers on: "write a blog post about", "review of [product]", "best [category] article", "comparison blog", "affiliate blog", "SEO article", "write a review", "product roundup", "blog content for affiliate"…
how-to-tutorial-writer
Write how-to guides and tutorials that naturally integrate affiliate product recommendations. Triggers on: "write a how-to guide", "tutorial for [task]", "step by step guide to [goal]", "how to [verb] with [product]", "write a tutorial blog post", "guide on how to [task]", "beginner guide to [topic]", "walkthrough for…
listicle-generator
Write "Top N best..." listicle articles for affiliate marketing with mini-reviews, pricing, pros/cons, and CTAs per entry. Triggers on: "write a best of list", "top 10 [category] tools", "best [product category] article", "roundup post", "listicle about [category]", "write a top tools article", "best [N] alternatives…
content-moat-calculator
Estimate pages needed for topical authority. Go/no-go decision before investing months in content. Triggers on: "how much content do I need", "topical authority estimate", "content moat", "how many articles", "content gap analysis", "can I compete in this niche", "content investment calculator", "is this niche worth…