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Skills marketplace

JuCode Desktop combines two upstream sources in one marketplace:

  • the official JuCode marketplace at /v1/skills/marketplace;
  • anthropics/skills, fetched directly from GitHub.

Desktop does not mirror or self-host either source. The Anthropic listing uses the small public metadata snapshot in src-tauri/resources/anthropic-skills.json so GitHub API availability and anonymous rate limits cannot make the source disappear. Installing one of those skills fetches its current files directly from raw.githubusercontent.com after reading the repository tree from the GitHub API.

Use node scripts/refresh-anthropic-skills.mjs to refresh the snapshot. The script discovers public skill directories through the GitHub Contents API, reads each SKILL.md frontmatter, checks its LICENSE.txt, and preserves curated tags already in the snapshot. Review the diff, especially license classification, before committing an update.

Install location and safety

The active session backend selects the personal install directory:

  • JuCode and Codex sessions: ~/.jucode/skills/<id>;
  • Claude Code sessions: ~/.claude/skills/<id>.

Skill IDs and every downloaded relative path are validated before joining them to that directory. GitHub tree links, submodules, absolute paths, and parent traversal are rejected. Downloads are limited to 20 MiB per file, 100 MiB total, and 4,096 files. JuCode zip and tar.gz packages retain their existing 20 MiB compressed limit, 100 MiB extracted limit, and the same traversal/link/file count checks. Installation stages files next to the destination and atomically replaces the old version only after a valid SKILL.md exists.

Skills are executable instructions and may include scripts. Treat installation like installing software and review upstream content before using it with sensitive projects.

Anthropic document-skill licensing

Most examples in anthropics/skills are Apache-2.0. The docx, pdf, pptx, and xlsx folders are different: Anthropic describes them as source-available rather than open source, and their terms prohibit redistribution. JuCode does not bundle or redistribute those files; an explicit install downloads the selected folder from Anthropic's GitHub repository to the user's machine. Users remain responsible for the upstream terms.

Anthropic's preset document skills for Word, PDF, PowerPoint, and Excel are available in supported Claude API/hosted surfaces, but they are not preset skills in Claude Code. Claude Code supports filesystem-based custom skills instead. A repository copy installed into ~/.claude/skills is a custom skill and does not become, or carry the runtime guarantees of, Anthropic's preset hosted skill.