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-opportunity-indexgit 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-opportunity-index)<a href="https://agentmods.dev/skills/joomcode/joompulse-skills/category-opportunity-index"><img src="https://agentmods.dev/badge/skills/joomcode/joompulse-skills/category-opportunity-index.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 | $0.00221 | $0.04405 |
| Opus 5 | $0.00111 | $0.02202 |
| Sonnet 5 | $0.00044 | $0.00881 |
| Haiku 4.5 | $0.00022 | $0.00441 |
Grade A, and why
category-opportunity-index 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 — 345 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Category Opportunity Index
This skill answers a single question for one category on Mercado Livre (Brasil) or Shopee Brasil: is it worth entering? Given a marketplace and a category named in free text, it reads that category's opportunity index (low, medium, or high) and its current monthly market indicators — estimated revenue, estimated sales, sellers, listings, and average ticket — then writes a short pt-BR summary that interprets the opportunity level together with how concentrated the market is and which way it is growing. On Mercado Livre the summary can also draw on a year of history and a seasonality read; on Shopee neither exists yet, and the report says so plainly instead of guessing.
This is a point-in-time snapshot, not a tracker. To rank the sellers inside a category, use the top-sellers-in-category skill. For the trending search terms shoppers use in a category, use the top-keywords-in-my-category skill. To compare a category's aggregates against a user-supplied previous snapshot, use the category-monitor skill. This skill answers "how attractive is this category right now?" for a category the user names.
Prerequisites
- JoomPulse MCP access is configured for the current agent environment.
- The user provides a marketplace — Mercado Livre (Brasil) or Shopee Brasil — and names the category to evaluate (free text is fine).
- The available JoomPulse tools can resolve a category name to a category on either marketplace and return that category's current monthly market indicators, plus — on Mercado Livre — its recent monthly history.
If JoomPulse MCP access is unavailable, stop and explain that the skill requires JoomPulse MCP setup before it can report a category's opportunity index.
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. The seller, listing, and average-ticket figures shown here are estimates too. 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.
- 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 approach does not return data, switch to another quietly; only if
every approach fails do you say one short, friendly sentence. Never fill gaps
from general knowledge, and never fabricate a number — show
—when a value is missing.
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 · 345 lines · 221 tokens per session scan A b650b8d2f4cf
category-opportunity-index is a skill published in the GitHub repository joomcode/joompulse-skills (50 stars, last pushed 18d ago), licensed MIT. It adds 221 tokens to every session and 4,405 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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