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 category-monitorgit 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/category-monitor)<a href="https://agentmods.dev/skills/joomcode/joompulse-skills/category-monitor"><img src="https://agentmods.dev/badge/skills/joomcode/joompulse-skills/category-monitor/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/joomcode/joompulse-skills/category-monitor"><img src="https://agentmods.dev/badge/skills/joomcode/joompulse-skills/category-monitor.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00211 | $0.03739 |
| Opus 5 | $0.00105 | $0.01869 |
| Sonnet 5 | $0.00042 | $0.00748 |
| Haiku 4.5 | $0.00021 | $0.00374 |
Grade A, and why
category-monitor 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 11d 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 — 306 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Category Monitor
This skill tracks one category's aggregate health over time on Mercado Livre (Brasil) or Shopee Brasil — its estimated sales, how many products and sellers it holds, how those sellers split across tiers, and how concentrated the market is.
Each run builds today's snapshot table for the category and offers it as a downloadable table. To see what changed, the user supplies the table from a previous period (the one this skill produced before); the skill compares the two and shows the difference per metric. The baseline is whatever table the user provides — there is no hidden session memory and nothing is stored server-side. The default view is the whole category; on Mercado Livre the user may instead point it at a single listing or a catalog product (a catalog product rolls up its competing listings). Shopee has no catalogue at all, so that input mode does not exist there.
To track one named product over time, use the product-change-monitor skill. For a one-shot opportunity / market-size snapshot, use the category-opportunity-index skill.
Prerequisites
- JoomPulse MCP access is configured for the current agent environment.
- The user provides a marketplace — Mercado Livre (Brasil) or Shopee Brasil — and names a category (on Mercado Livre, optionally a single listing or a catalog product instead).
- For a period comparison, the user supplies a previous table that this skill produced for the same category on the same marketplace (pasted or uploaded). Without it, the skill produces a standalone snapshot.
- The available JoomPulse tools can resolve a category name to its identifier and return that category's monthly aggregate metrics and its seller-tier breakdown on either marketplace.
If JoomPulse MCP access is unavailable, stop and explain that the skill requires JoomPulse MCP setup before it can monitor a category.
Scope
- Mercado Livre (Brasil) and Shopee Brasil, one at a time. Other marketplaces are out of scope.
- Sales and revenue are JoomPulse estimates — not real transactions. Disclose this in every output. The estimates are built differently on each marketplace: on Mercado Livre from historical listing data, on Shopee from the marketplace's own rounded sold counters refined with review movement. Use the matching disclaimer.
- Read-only. The skill never writes or modifies anything; it does not store the snapshot — the user keeps the downloadable table and brings it back next period.
- Language: detect the seller's language and respond in it. Default to pt-BR.
- The baseline is user-supplied. Never claim a change without a previous table to compare against, and never infer or fabricate one from memory.
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.
- 11d ago First seen · 306 lines · 211 tokens per session scan A f37ec362b24a
category-monitor is a skill published in the GitHub repository joomcode/joompulse-skills (50 stars, last pushed 21d ago), licensed MIT. It adds 211 tokens to every session and 3,739 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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