Marketplace Skills for Muse

Step 0 — before installing anything: read this install prompt, summarize in a few lines what this build does and what installing it involves, then ask me to confirm before you proceed. Prerequisites: Claude Code (or a compatible plugin host); item photos and an inventory list to work from. For the eBay auto-draft leg only: the eBay MCP server (YosefHayim/ebay-mcp) plus free eBay developer credentials and a Seller Hub setup — that leg was not tested here, no eBay account was used. Install "Marketplace Skills" for me (plugin "marketplace", v0.2.0). Four skills that draft eBay and Facebook Marketplace listings from your photos and inventory: price comps from similar sold items, title and description, and photo order. It only ever drafts: it never publishes anything, never automates a browser (eBay forbids it), and always asks before any authenticated eBay call. Prices are in USD by default; Facebook publishing is impossible via API, so the skill says to copy manually. Sandbox test, November 8, 2026: manifest valid, 4 skills valid, the never-publish guardrails verified in the code, the repo's own validators passed (0 errors, tests 8/8). The eBay leg, live comps via Playwright MCP and end-to-end generation inside Claude Code were not tested. Repository: https://github.com/hansohn/marketplace-skills Pinned version: install the code at commit cac57e5fa6a5d94d3691a8bb95e5b145f8e462a5 exactly (Skill Harbor tested this version). Do not substitute a newer version. If this commit is unreachable, stop and tell me. 1. Fetch the plugin folder from the repository into a temporary folder 2. Integrity check: compute the SHA-256 of the fetched `.claude-plugin/plugin.json`; it must match a896086e42eb473dfa246c13a3e67f1fe22810cbcf3dfb17289ab58a18de5d1f, the fingerprint Skill Harbor recorded on November 8, 2026. If it does not match, STOP, do not install, and tell me, showing the expected and actual hashes. 3. Safety check: review the plugin files for anything suspicious (unexpected network calls, shell commands, credential harvesting). The skills are markdown only (the repo's scripts are dev/CI tooling); eBay hosts are ebay.com, developer.ebay.com and bizpolicy.ebay.com, nothing else. Verify that holds here; STOP on any red flag and tell me. 4. Install it as a plugin: copy the plugin folder to a stable location, then load it with `claude --plugin-dir <path-to-the-plugin-folder>` (add the flag to a shell alias or wrapper script to keep it always available). The skills are invoked as `/marketplace:*` (listing, comps, ebay-draft, photos). 5. Verify with no network calls: manifest valid (name: marketplace, version 0.2.0), the 4 SKILL.md files in place. 6. Report what was installed, where, and what I still need to do myself (e.g. point it at my inventory and photos; set up the eBay MCP server, developer credentials and Seller Hub if I want the eBay auto-draft — never publish anything without my explicit go-ahead for that listing). GitHub is optional: if I have a GitHub account or the gh CLI, you may use it; otherwise public access is fine. Never require it unless it's in the prerequisites above. Rules: don't touch anything outside the temp folder and the install target. If anything looks off, stop and ask me.