Add my-product-vs-catalog skill

[norightsforlis]

Summary

Adds a new skill my-product-vs-catalog to the catalog.

It compares a seller's own Mercado Livre listing against every other seller of the same catalog product — the buy-box competition — and tells them, in pt-BR, where they win, where they lose, and what to fix first. For each parameter (price, free shipping, Mercado Envios Full, listing type, reviews, rating, seller reputation/medal, official store) it assigns a status — 🟢 Melhor / 🟡 Na média / 🟠 Pior / 🔴 Criticamente pior — and returns a verdict, a comparison table, a prioritized action list, and a downloadable spreadsheet. It can also arm a weekly monitor that reports what changed.

It complements the existing skills: single-product analysis (a product plus comparable products) and the change-monitor (one product over time). This one is about competing inside one catalog product.

Changes

• skills/my-product-vs-catalog/SKILL.md — new skill (frontmatter + public workflow).
• README.md — added the skill to the Skills table.
• CHANGELOG.md — noted under Unreleased.

Notes

• Mercado Livre (Brasil) only; sales and revenue are JoomPulse estimates, not real transactions.
• Documentation-only and public-safe per CONTRIBUTING.md: no scripts, internal paths, private service names, or implementation details. Directory name matches the frontmatter name.

🤖 Generated with Claude Code

[profunctor]

KISS review: this skill over-promises in a few user-visible places.

• It advertises an optional weekly monitor via a scheduling skill, but this repo does not include such a skill, so agents may promise a capability the plugin cannot provide.
• It says the report compares against “every other seller” / the “full set”, while the edge case allows sampled large catalogs. Please phrase this as “available competing listings” and require sample disclosure.
• Reviews/rating are listed as scored dimensions even though the body correctly says catalog-shared metrics are usually not comparable.

I’d remove the monitoring section and simplify the public promise before merging.

[profunctor]

Review — my-product-vs-catalog

Summary: A documentation-only skill that compares a seller's own Mercado Livre (Brasil) listing against every other seller of the same catalog product (the buy-box competition). It scores each parameter (price, free shipping, Mercado Envios Full, listing type, reviews/rating, photos, seller reputation/medal, official store) on a four-level color scale, then returns a pt-BR verdict, comparison table, prioritized action list, optional competitors table, and a downloadable spreadsheet, with an optional weekly monitor.

Findings:

• minor — Inconsistent disclaimer format. Both sibling skills include a verbatim ⚠️ blockquote disclaimer with parallel EN/pt-BR text "in every output"; this skill only has a prose "Disclaimer — sales and revenue are JoomPulse estimates…" with no blockquote and no pt-BR text. Reuse the established bilingual blockquote so it renders in the seller's language.
• minor — "Photos — best-effort count" may overpromise. Photo count is not a field the sibling skills surface from JoomPulse, and Prerequisites only assert listing/buy-box market data. If it isn't reliably obtainable it'll often fall to "dado indisponível." The capability may be aspirational.
• nit — The frontmatter description parameter list omits "photos", which the body lists under both "Parameters Compared" and the prioritization. Align them.

Triggering is good (well-scoped, EN+pt-BR triggers, explicit disambiguation from the two siblings). README row + CHANGELOG entry correctly added; directory name == name. No scripts, internal paths/URLs, or leaked field names. The one item to address before merge is the bilingual blockquote disclaimer (#1); the rest is polish.