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 alivirgo/Major-AI-Skills --skill compare-two-products-fairlygit clone --depth 1 https://github.com/alivirgo/Major-AI-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/alivirgo/major-ai-skills/compare-two-products-fairly)<a href="https://agentmods.dev/skills/alivirgo/major-ai-skills/compare-two-products-fairly"><img src="https://agentmods.dev/badge/skills/alivirgo/major-ai-skills/compare-two-products-fairly/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/alivirgo/major-ai-skills/compare-two-products-fairly"><img src="https://agentmods.dev/badge/skills/alivirgo/major-ai-skills/compare-two-products-fairly.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 | $0.00023 | $0.00928 |
| Opus 5.5 | $0.00009 | $0.00371 |
| Sonnet 5.5 | $0.00005 | $0.00186 |
| Haiku 4.5 | $0.00002 | $0.00093 |
Grade A, and why
compare-two-products-fairly 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 20d 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 — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Compare Two Products Fairly (Symmetrical Comparison Matrix) (AI Skill)
Overview
Asking an AI "Which is better: Product A or Product B?" triggers shallow generalizations and often biases towards whichever product has more marketing presence.
The Symmetrical Comparison Protocol forces the AI into an objective, head-to-head evaluation framework that compares exact functional dimensions, total cost of ownership, and specific user profile matches.
The Head-to-Head Comparison Framework
┌─────────────────────────────────────────────────────────────┐
│ Symmetrical Comparison Matrix │
│ │
│ [ PRODUCT A ] vs. [ PRODUCT B ] │
│ │ │ │
│ • Primary Superpower • Primary Superpower│
│ • Fatal Limitation • Fatal Limitation │
│ • True Pricing & Hidden Costs • True Pricing │
│ • Ideal User Match • Ideal User Match │
│ │
│ └──────────────────────┬──────────────────┘ │
│ ▼ │
│ [ Decision Fork: If X $\rightarrow$ A, If Y $\rightarrow$ B ] │
└─────────────────────────────────────────────────────────────┘
Master Head-to-Head Prompt Templates
Pattern 1: The Symmetrical Matrix Directive
Use for comparing developer tools, SaaS apps, or hardware:
Compare [PRODUCT A] and [PRODUCT B] for [TARGET USE CASE / TEAM SIZE].
Output Rules:
1. Generate a single Markdown comparison table with the following headers:
| Evaluation Dimension | [PRODUCT A] | [PRODUCT B] | Advantage Winner |
2. Cover these dimensions:
- Primary Architectural Superpower
- Worst Limitation / Pain Point
- Pricing Model & Hidden Add-on Costs
- Learning Curve / Time to Implement
3. Follow the table with a "Decision Fork":
- "Choose [PRODUCT A] if you prioritize..."
- "Choose [PRODUCT B] if you prioritize..."
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.
- 20d ago Changed · -11 tokens per session bfc4588ddd78
- 25d ago First seen · 88 lines · 34 tokens per session scan A 7caab40c8c22
compare-two-products-fairly is a skill published in the GitHub repository alivirgo/Major-AI-Skills (1 stars, last pushed yesterday), licensed MIT. It adds 23 tokens to every session and 928 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-05.
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