A marketplace-listing workflow for secondhand items that combines price research, listing text, platform-specific versions, and photo ordering in one Markdown file. It supports Facebook Marketplace and eBay, with an option to create an unpublished eBay draft.

It is for selling, cross-listing, or flipping used items, including batch work from a CSV. Individual steps can also be used separately for price comparisons, photo selection, or pushing an existing listing to eBay.

It removes the need to plan pricing, write separate listings, choose photo order, and assemble the results by hand. The eBay draft remains for your review before publication.

listing — Skill for Claude Code by hansohn

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add hansohn/marketplace-skills

Claude Code

/plugin install marketplace

Made for: Claude Code.

Or install marketplace, the plugin that ships this one along with the rest of its 4 skills, 2 agents.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/hansohn/marketplace-skills/listing/github.svg)](https://agentmods.dev/skills/hansohn/marketplace-skills/listing)

Your own site

<a href="https://agentmods.dev/skills/hansohn/marketplace-skills/listing"><img src="https://agentmods.dev/badge/skills/hansohn/marketplace-skills/listing/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/hansohn/marketplace-skills/listing"><img src="https://agentmods.dev/badge/skills/hansohn/marketplace-skills/listing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 195 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,986 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00195	$0.04986
Opus 5	$0.00097	$0.02493
Sonnet 5	$0.00039	$0.00997
Haiku 4.5	$0.00019	$0.00499

Measured 12d ago against content hash a7e1f3eea612, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

listing 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 12d 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.

skills/listing/SKILL.md · 265 lines

How it starts

The opening of the file, as written. The whole thing — 265 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Listing

Orchestrator for the marketplace plugin. Reads item details, gets pricing comps and photo selection, generates listing copy for each enabled platform, and assembles a single .md listing file.

When to use

Trigger automatically when:

The user wants to sell, list, post, cross-list, or flip a used item on a supported marketplace (Facebook Marketplace or eBay)
The user references a CSV of items to sell (batch run — one listing file per row)
The user wants the full listing artifact (pricing + copy + photo order), not just one piece of it

Delegate instead of running the full flow when the user wants only one phase: pricing-only → /marketplace:comps, photo-order-only → /marketplace:photos, push-an-existing-listing-to-eBay → /marketplace:ebay-draft.

Paths

Every path this skill references — platforms/, templates/, references/, and the sibling skills (comps, photos, ebay-draft) — lives at the plugin root (the directory containing .claude-plugin/), not inside this skill's folder. When the plugin is installed, resolve them as ${CLAUDE_PLUGIN_ROOT}/platforms/…, ${CLAUDE_PLUGIN_ROOT}/templates/…, etc. A bare platforms/foo.md read relative to skills/listing/ will 404 — always anchor to the plugin root.

Invocation

/marketplace:listing [item-or-csv] [--platforms=<csv>] [--location=<city, state zip>]

Argument resolution (fallback chain):

If first arg is a .csv file → process every row as a separate item; generate one listing file per row in the CSV's directory. Each row carries its own per-item overrides: Photos (that item's photo folder — blank → ./Photos/), Platforms (overrides the run-level platform selection for that row only), MSRP/Asking (price overrides), and Quantity (units available). See Required context per item for the full column list.
If first arg is any other text → treat as a single item name; generate one listing file in the current working directory.
If no first arg → interactive mode. Ask:
- What item are you listing? (or "I have a CSV — here's the path")
- Where are the photos? (default: ./Photos/)
- Location for pricing/pickup? (see Location resolution below)

Read the full file on GitHub · 265 lines

Files

What ships with it

1 file 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/evals.json 3.6 KB

Changes

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.

12d ago First seen · 265 lines · 195 tokens per session scan A a7e1f3eea612

Subscribe to this mod's changes

listing is a skill published in the GitHub repository hansohn/marketplace-skills (1 stars, last pushed 1mo ago), licensed MIT. It adds 195 tokens to every session and 4,986 once invoked, about $0.0010 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 2026-08-31.

Claude Code E-commerce agent-skills anthropic claude claude-code-plugin claude-skills

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listing

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

Listing

When to use

Paths

Invocation

What ships with it

What this file has done since we first saw it

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