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 joomcode/joompulse-skills --skill my-product-vs-cataloggit clone --depth 1 https://github.com/joomcode/joompulse-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/joomcode/joompulse-skills/my-product-vs-catalog)<a href="https://agentmods.dev/skills/joomcode/joompulse-skills/my-product-vs-catalog"><img src="https://agentmods.dev/badge/skills/joomcode/joompulse-skills/my-product-vs-catalog.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00222 | $0.02134 |
| Opus 5 | $0.00111 | $0.01067 |
| Sonnet 5 | $0.00044 | $0.00427 |
| Haiku 4.5 | $0.00022 | $0.00213 |
Grade A, and why
my-product-vs-catalog 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.
How it starts
The opening of the file, as written. The whole thing — 164 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Mercado Livre — My Product vs. Catalog (Buy-Box Competitiveness)
This skill compares the seller's own Mercado Livre (Brasil) listing against the available competing listings of the same catalog product — the sellers competing for the same buy-box — and tells the seller, in pt-BR, where they win, where they lose, and what to fix first to win the buy-box and convert more.
Given a product by a Mercado Livre link, a JoomPulse link, a Mercado Livre listing identifier, or a catalog product identifier, it identifies the seller's listing and the catalog it belongs to, gathers the available competing listings, and produces a short verdict, a comparison table, a prioritized list of improvements, and a downloadable spreadsheet. The comparison covers the available competing listings; when a large catalog is sampled, it says so.
This is different from the sibling skills. To size up a single product and find the products that compete with it, use the single-product analysis skill. To track how one product moves over time, use the change-monitor skill. This skill answers "how do I stack up against the other sellers of the exact same product, and what should I change to win?"
Prerequisites
- JoomPulse MCP access is configured for the current agent environment.
- The seller provides their product as a Mercado Livre link, a JoomPulse link, a Mercado Livre listing identifier, or a catalog product identifier.
- The available JoomPulse tools can look up a listing's current market data, the set of competing listings for the same catalog product, and the buy-box winner's attributes.
If JoomPulse MCP access is unavailable, stop and explain that the skill requires JoomPulse MCP setup before it can compare a listing against its catalog.
Scope
- Mercado Livre (Brasil) only. JoomPulse also covers Shopee Brasil, but Shopee has no catalogue and no buy-box — an item belongs to one shop, so there is no set of rival offers on the same product to be measured against and no buy-box to win. This analysis therefore exists only for Mercado Livre; never apply its logic or its verdict wording to a Shopee item.
- It compares within one catalog product. The comparison is the seller versus the other sellers of the same catalog product (the same buy-box), not a search for similar products.
- Sales and revenue are JoomPulse estimates derived from historical listing data — not real transactions. Disclose this in every output. Price, rating, review count, logistics, and seller attributes are real Mercado Livre data — say so, it is a strength of the report.
- Read-only. The skill does not sign in as the seller or modify any listing.
- Language: detect the seller's language and respond in it. Default to pt-BR.
- Keep the workflow invisible. The seller wants the answer, not a play-by-play. If one lookup returns nothing, switch approaches quietly; only if everything fails do you say one short, friendly sentence.
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 · 164 lines · 222 tokens per session scan A 12a79ff3f778
my-product-vs-catalog is a skill published in the GitHub repository joomcode/joompulse-skills (50 stars, last pushed 18d ago), licensed MIT. It adds 222 tokens to every session and 2,134 once invoked, about $0.0011 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 2026-08-30.
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