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 finsilabs/awesome-ecommerce-skills --skill faceted-navigationgit clone --depth 1 https://github.com/finsilabs/awesome-ecommerce-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/finsilabs/awesome-ecommerce-skills/faceted-navigation)<a href="https://agentmods.dev/skills/finsilabs/awesome-ecommerce-skills/faceted-navigation"><img src="https://agentmods.dev/badge/skills/finsilabs/awesome-ecommerce-skills/faceted-navigation/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/finsilabs/awesome-ecommerce-skills/faceted-navigation"><img src="https://agentmods.dev/badge/skills/finsilabs/awesome-ecommerce-skills/faceted-navigation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00026 | $0.02549 |
| Opus 5 | $0.00013 | $0.01274 |
| Sonnet 5 | $0.00005 | $0.00510 |
| Haiku 4.5 | $0.00003 | $0.00255 |
Grade A, and why
faceted-navigation 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 9d 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 — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Faceted Navigation
Overview
Build a filterable product listing page (PLP) where shoppers can narrow results by multiple attributes simultaneously — size, color, brand, price range, rating — while keeping the URL in sync so filters are shareable, bookmarkable, and crawlable by search engines. Good faceted navigation drives measurable conversion lift on catalogs with more than 50 SKUs.
When to Use This Skill
- When a product catalog exceeds ~50 SKUs and browse-only navigation causes shopper frustration
- When building or redesigning a category/collection listing page
- When SEO requires crawlable faceted URLs (e.g.,
/shoes/running?color=black&size=10) - When replacing a legacy faceted implementation that breaks the back button
- When implementing Algolia InstantSearch or a custom faceting layer on Elasticsearch
Core Instructions
Step 1: Determine the merchant's platform and choose the right approach
| Platform | Recommended Approach | Why |
|---|---|---|
| Shopify | Enable native collection filters (Online Store 2.0 themes) + install Search & Discovery app (free) | Dawn, Sense, and other OS2.0 themes support native storefront filtering via the Storefront API; Search & Discovery adds synonym, boosting, and filter configuration from the admin |
| WooCommerce | Install FiboSearch (paid, $49/yr) or WooCommerce Product Filters (free) plugin | FiboSearch adds AJAX-powered facets with price slider, color swatches, and stock filter; the free Product Filters plugin covers basic attribute filtering with URL state |
| BigCommerce | Enable Faceted Search in Storefront → Search settings (built-in on Cornerstone and most themes) | BigCommerce Faceted Search is native to the platform — configure which product attributes appear as facets in the admin; no app required |
| Custom / Headless | Build with Algolia InstantSearch or Elasticsearch + URL state management | Full control over facet logic, disjunctive filtering, and count freshness; see implementation details below |
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- evals/facet-search-api-and-price-range-slider/criteria.json 2.5 KB
- evals/facet-search-api-and-price-range-slider/task.md 2.9 KB
- evals/facetpanel-accessibility-and-display/criteria.json 2.7 KB
- evals/facetpanel-accessibility-and-display/task.md 2.8 KB
- evals/url-driven-filter-state-management/criteria.json 2.4 KB
- evals/url-driven-filter-state-management/task.md 2.9 KB
- tile.json 237 B
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.
- 9d ago First seen · 207 lines · 26 tokens per session scan A 5087ed72ce0c
faceted-navigation is a skill published in the GitHub repository finsilabs/awesome-ecommerce-skills (52 stars, last pushed 6mo ago), licensed MIT. It adds 26 tokens to every session and 2,549 once invoked, about $0.0001 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 2026-09-03.
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