Seller Overview Tracker

This skill tracks one seller over time on Mercado Livre (Brasil) or Shopee Brasil — its estimated monthly revenue and sales, listing count, sales trend, average ticket and average price, the categories it covers, its location, and how buyers rate it. On Mercado Livre it also carries the seller medal, the cancellation rate and the rolling 60-day and 365-day sales; none of those three last fields exist on Shopee, where the shop tier stands in for the medal.

Each run builds today's snapshot table for the seller and offers it as a downloadable table. To see what changed, the user supplies the seller's 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 seller is identified by a store link or a seller identifier on either marketplace.

It is different from ranking work: to rank many sellers in a category and track how that ranking moves, use the top-sellers-in-category skill; to analyze one product, use the single-product analysis skill. This skill follows one seller.

Prerequisites

• JoomPulse MCP access is configured for the current agent environment.
• The user provides a marketplace — Mercado Livre (Brasil) or Shopee Brasil — and one seller as a store link or a seller identifier on that marketplace.
• For a period comparison, the user supplies a previous table that this skill produced for the same seller on the same marketplace (pasted or uploaded). Without it, the skill produces a standalone snapshot.
• The available JoomPulse tools can look up that seller's current market snapshot on either marketplace. On Shopee the shop's estimated revenue and sales are not published as one store-level figure — the tools report them per item, so the skill builds the shop total up from its items.

If JoomPulse MCP access is unavailable, stop and explain that the skill requires JoomPulse MCP setup before it can monitor a seller.

Scope

• Mercado Livre (Brasil) and Shopee Brasil, one at a time. Other marketplaces are out of scope.
• Sales and revenue are JoomPulse estimates — estimated monthly revenue, estimated monthly sales, average ticket, and average price are not real transactions. Disclose this in every output.
  • On Mercado Livre, by contrast, the rolling 60-day and 365-day sales counts, the sales trend, and the cancellation rate are real Mercado Livre data.
  • On Shopee every sales figure is an estimate — there is no real-data counterpart, so the Mercado Livre sentence above must never appear in a Shopee output. Only price, the buyer rating and the review count are real.
• Read-only. The skill never signs in as the seller or modifies a listing; it does not store the snapshot — the user keeps the downloadable table and brings it back next period.
• Language: respond in pt-BR by default; mirror another language only if the user clearly uses it.
• The baseline is user-supplied. Never claim a change without a previous table to compare against, and never infer or fabricate one from memory. The previous table must be for the same seller on the same marketplace.
• Keep the workflow invisible. The user wants the answer, not a play-by-play. If one approach does not return data, retry quietly; only if it still fails do you say one short, friendly sentence.

Shopee data — what differs from Mercado Livre

• Estimates come from Shopee's own rounded sold counters, refined with review movement. Treat small gaps between items as noise and never rank on a difference of a few units. Price, rating and review count are real.
• Coverage is not a census: only items with at least one lifetime sale are tracked, so any count is a lower bound and an absent item is not evidence it does not sell.
• History starts May 2026 — there is no long-run trend and no seasonal read.
• Category analytics stop at three levels; the item view reaches deeper. Say which you used.
• No seller medals — Shopee has three mutually exclusive shop tiers: Official store, Preferred (Indicado) and Common. There is no ladder; inventing Shopee medals is fabrication.
• No catalogue and no buy-box, and an item belongs to one shop.
• No fulfilment programme, no free-shipping flag and no listing tier — show — rather than guessing.
• Concentration is measured differently and thresholds do not transfer between marketplaces.
• Item titles mix Portuguese, English and Chinese — search both languages.

Workflow

Step 0 — Decide the marketplace

JoomPulse covers two separate marketplaces: Mercado Livre (Brasil) and Shopee Brasil. They are independent datasets with different coverage, history and mechanics. Decide which one the request belongs to before reading any data:

• The seller said so. "Shopee" means Shopee; "Mercado Livre", "MeLi" or "ML" means Mercado Livre.
• An identifier gives it away. An identifier beginning MLB is Mercado Livre; a bare 10–11 digit number is a Shopee item or shop. A mercadolivre.com.br link is Mercado Livre, a shopee.com.br link is Shopee. If an identifier is not found on the marketplace you assumed, check the other one before telling the seller it does not exist.
• The request only makes sense on one of them — buy-box, catalogue position, seller medals, a fulfilment programme or search keywords are Mercado Livre only.
• Otherwise ask — one short question, mentioning that both are available. Never guess and never default.

Never mix data from the two marketplaces in one query, one table or one total. They are separate pipelines with different grains and estimate methods; a combined figure is simply wrong. If the seller wants both, run the analysis twice and report the two side by side, comparing direction and orders of magnitude — never exact numbers.

Step 1 — Resolve the seller and pull today's snapshot

1. Resolve the seller from the store link or seller identifier the user provided, on the marketplace settled in Step 0. If given a store link, resolve it to the seller once.
2. Use JoomPulse to pull the current snapshot for that one seller.
   • Mercado Livre: store name, estimated monthly revenue, estimated monthly sales, sales trend, cancellation rate, listing count, rolling 60-day and 365-day sales, the categories covered, seller medal, reputation, average ticket and average price, and location.
   • Shopee: shop name, the categories the shop covers, its location, its buyer rating and review count, average ticket and average price, and the shop's item count. Build the shop's estimated revenue and sales up from its items — there is no store-level figure to read, and the result is an estimate, so label it one. For the sales trend, count how many of the shop's items are growing, stable and falling. Cancellation rate and the rolling 60-day and 365-day sales counts do not exist on Shopee — do not look for a substitute and do not derive one.
3. If the seller is not found, check the other marketplace before saying so; if it is on neither, say so plainly and stop — invent nothing.

Step 2 — Present today's snapshot and offer it for download

Lay out the snapshot fields as a table, headed with the store name, the marketplace and the date. This table is the deliverable — and offer it as a downloadable file (.csv / .xlsx) so the user can save it and bring it back next period as the baseline. If any field comes back empty, show —; never substitute a guess. On Mercado Livre add the JoomPulse seller dashboard link; on Shopee link the shop on Shopee instead — there is no JoomPulse dashboard link for Shopee, so never invent one. On a standalone snapshot there is no change column and no color-dot legend — just field and current value.

Step 3 — Offer comparison, and compare if a previous table is supplied

Invite the user to send a previous table for the same seller to compare periods. If they provide one, check it is for the same seller on the same marketplace, then parse its values, align by field to today's snapshot, and render a comparison table with the difference per field. A difference requires both an old and a new value for the same field — if a field is missing or unreadable in the supplied table, show —, never a fabricated trend. On Shopee, remember the three fields that do not exist there stay — on both sides and can never yield a change. If no previous table is supplied, the snapshot stands on its own and the user is told to save it for next time.

Output

Respond in pt-BR by default. Present the result with no commentary about how it was produced. Lead with a short line naming the marketplace and the store.

Snapshot (always): a markdown table | Campo | Valor atual | for the rows below, plus a downloadable .csv / .xlsx of the same data.

Snapshot / comparison rows (Mercado Livre) — pt-BR labels:

• Nome da loja
• Receita média mensal (estimada)
• Vendas médias mensais (estimadas)
• Tendência de vendas
• Taxa de cancelamento
• Anúncios
• Vendas (60 dias)
• Vendas (365 dias)
• Categorias
• Medalha (platina / ouro / prata / sem medalha)
• Reputação (5 verde, a melhor … 1 vermelho, a pior)
• Ticket médio / preço médio
• Localização (cidade, estado, país)
• Link JoomPulse do vendedor

Snapshot / comparison rows (Shopee) — same shape, with the marketplace's own fields:

• Nome da loja
• Receita média mensal (estimada) — built up from the shop's items, never read as one store-level figure; always label it an estimate
• Vendas médias mensais (estimadas) — same build-up, same label
• Tendência de vendas — how many of the shop's items are growing, stable or falling (for example 12 em alta · 30 estáveis · 8 em queda). It is a mix, not a single percentage — never compress it into one figure
• Taxa de cancelamento — —: no Shopee equivalent exists
• Anúncios — counts only items with at least one lifetime sale, so it under-counts the shop's listings; say so
• Vendas (60 dias) — —: no Shopee equivalent exists
• Vendas (365 dias) — —: no Shopee equivalent exists
• Categorias — the categories the shop covers
• Nível da loja (Official store / Preferred (Indicado) / Common) — three mutually exclusive tiers, not a ladder. Never map a tier onto a seller medal
• Avaliação dos compradores (0–5 estrelas), com o número de avaliações — this is not the Mercado Livre reputation thermometer; it is a star rating, not a colour ladder. Say so explicitly rather than presenting them as the same field
• Ticket médio / preço médio
• Localização
• Link da loja na Shopee — there is no JoomPulse dashboard link for Shopee, so never invent one

For the three rows with no Shopee equivalent at all — cancellation rate, sales over the last 60 days and sales over the last 365 days — show — and state plainly that the data does not exist for Shopee. Never imply zero, and never present an estimate in their place.

Comparison (only when a previous table is supplied): a markdown table | Campo | Era | Agora |. Put the change (figure, percentage, or percentage point) inside the Agora cell, prefixed with a semantic color dot:

• 🟢 good: revenue up, sales up, listings up, medal improved, reputation or buyer rating improved, cancellation rate down.
• 🔴 bad: revenue down, sales down, listings down, medal worse, reputation or buyer rating worse, cancellation rate up.
• The cancellation rate is inverted — down = 🟢, up = 🔴.
• Categorias moving is neutral context — show the change with no color dot.
• On Shopee the shop tier is not a rung — the three tiers are mutually exclusive, so a tier that changed is neutral context with no dot, and "moved up a tier" or "moved up a medal" phrasing must not be used. The Shopee sales trend is a mix of growing, stable and falling items, so report how that mix shifted rather than colouring one number.

Column headers are words (Campo | Era | Agora), never a bare "Δ" symbol. Show the color-dot legend (🟢/🔴) only in the comparison table, where the dots actually appear — never on a plain snapshot.

Close with a short Principais insights section: with a comparison, interpret what moved; on a standalone snapshot, frame it as the starting picture with no trend claims. On Shopee, note that history starts May 2026, so there is no long-run trend and no seasonal read.

Disclaimer (every report) — use the variant for the marketplace you queried.

Mercado Livre:

⚠️ Receita e vendas são estimativas do JoomPulse com base no histórico de anúncios — não são transações reais. / Revenue and sales are JoomPulse estimates based on historical listing data — not actual transactions.

Shopee:

⚠️ Todos os números de vendas e receita são estimativas do JoomPulse, a partir dos contadores arredondados da própria Shopee — não são transações reais, e diferenças pequenas são ruído. Só itens com pelo menos uma venda no histórico são rastreados, então a contagem de anúncios é um piso. Preço, avaliação e número de avaliações são reais. / Every sales and revenue figure is a JoomPulse estimate built from Shopee's own rounded sold counters — not actual transactions, and small gaps are noise. Only items with at least one lifetime sale are tracked, so the listing count is a lower bound. Price, rating, and reviews are real.

Keep it concise — no methodology, no internal jargon, and do not explain these rules to the user.

Visualization

Render the visuals every time the data supports them. As soon as the analysis is done, present the cards and charts described below as a self-contained visual panel — an artifact where the client renders artifacts, an inline widget where it renders widgets. Do not ask permission first, do not describe the panel instead of drawing it, and do not offer it as an optional extra: the cards and charts are part of the answer, not a follow-up.

• Order: the cards first, then the charts, then the written read.
• The data table always stays markdown in the response text, never inside the panel — the panel carries cards and charts only.
• The estimate disclaimer always stays in the response text as well.
• Skip an individual chart when its own data threshold is not met (each threshold is stated below): a chart nobody can read is worse than no chart. Skipping one chart never means skipping the panel.
• Only the cards and charts specified below. Do not invent extra ones, and do not promote a categorical value to a bar — a chip or plain text is the honest rendering for it.
• If no visual surface is available at all, fall back to the markdown table plus the same figures written as text cards. Never block on visuals, and never leave the answer without its numbers.

The panel contains:

• Metric cards for the key current metrics — on Mercado Livre, for example estimated monthly revenue, estimated monthly sales, listings, cancellation rate, and medal / reputation; on Shopee, estimated monthly revenue and sales (built up from items), listings, buyer rating, and shop tier. With a comparison, you may annotate each card with its era → agora change. Never show a card for a field that does not exist on the marketplace — no cancellation-rate or 60/365-day card on Shopee.
• Round all displayed numbers and use pt-BR number and currency formatting (for example R$ 1,38 mi, 7.900, +1,3 p.p.) everywhere — cards and table.
• On Mercado Livre, use a consistent medal palette: platina = purple, ouro = amber, prata = blue, sem medalha = white with a thin border (white needs the border to stay visible on a light background). On Shopee there are no medals — write the shop tier as plain text and never colour it as if it were a rung on a ladder.
• The Shopee sales trend is a mix of growing, stable and falling items; if you chart it, chart the three counts side by side, never a single percentage.
• No synthesized trend line from a single snapshot (there is no server-side history). Only if the user supplies several past-period tables may you plot a simple line across those periods — and on Shopee no such line can reach back before May 2026, where the history starts.

Example comparison table, Mercado Livre (only with a previous table):

Campo	Era	Agora
Receita mensal (est.)	R$ 1,20 mi	🟢 R$ 1,38 mi · ↑ +15%
Vendas/mês (est.)	8.400	🔴 7.900 · ↓ −6%
Medalha	Ouro	🟢 Platina · ↑
Reputação	4 verde-claro	🟢 5 verde · ↑
Taxa de cancelamento	2,1%	🔴 3,4% · ↑ +1,3 p.p.
Categorias	12	14 · +2

Example comparison table, Shopee (same shape, marketplace's own fields):

Campo	Era	Agora
Receita mensal (est.)	R$ 180 mil	🟢 R$ 214 mil · ↑ +19%
Vendas/mês (est.)	3.100	🔴 2.850 · ↓ −8%
Tendência de vendas	10 alta · 34 est. · 6 queda	14 alta · 28 est. · 8 queda
Nível da loja	Common	Preferred (Indicado)
Avaliação dos compradores	4,6 (1.204 aval.)	🟢 4,8 (1.410 aval.) · ↑
Taxa de cancelamento	—	— (não existe na Shopee)
Vendas (60 dias)	—	— (não existe na Shopee)

Presentation rules: column headers are words, never a bare "Δ" symbol; show the color-dot legend only when those dots appear (the comparison table); render a chart only when the data supports it.

Notes & Guardrails

The user should never see a system or stack error — only a friendly next step. Translate any failure into one short, friendly sentence, and retry once quietly on a transient hiccup.

• Marketplace unclear: ask one short question naming both before reading any data. Never guess and never default.
• Seller not found: check the other marketplace first; if it is on neither, state it plainly, stop, and invent nothing.
• No previous table supplied: render today's snapshot only (no change column, no legend) and invite the user to save it for next time.
• Supplied table is for a different seller, a different marketplace, malformed, or unreadable: say so plainly and fall back to the snapshot only; do not force a misaligned comparison, and never compare a Shopee table against a Mercado Livre one.
• Empty or failed pull: say the data is temporarily unavailable and to try again. Never paste internal error text, HTTP codes, or field names to the user.
• A single field empty but the seller is found: show — for that field and keep the rest.
• Fields that do not exist on Shopee: cancellation rate and sales over the last 60 and 365 days are absent attributes, not missing values. Show —, say the data does not exist for Shopee, and never fill the gap with a zero or an estimate.
• Shopee listing count: it covers only items with at least one lifetime sale, so it under-counts the shop's listings — say so rather than presenting it as complete.