pdm-build-bub

pdm-build-bub is a pdm-backend build hook that downloads skill repositories declared in pyproject.toml and vendors them into built wheel and editable artifacts under bub_skills/.

Installation

Add the plugin to the project that produces the wheel:

[build-system]
requires = ["pdm-backend", "pdm-build-bub"]
build-backend = "pdm.backend"

Configuration

Declare sources in pyproject.toml:

[tool.bub]
skills = [
    "PsiACE/skills",
    { git = "https://github.com/PsiACE/skills.git", ref = "v1.0.0", include = ["python*"] },
    { git = "vercel-labs/agent-skills", subpath = "skills/find-skills" },
]

Supported source formats:

• Full Git URLs such as https://github.com/PsiACE/skills.git
• GitHub shorthand in OWNER/REPO form such as PsiACE/skills

Discovery roughly follows the npm skills package:

• If the selected path itself contains SKILL.md, it is treated as one skill.
• Otherwise it searches common skill roots such as skills/, skills/.curated/, .codex/skills/, .claude/skills/, .agents/skills/ and similar agent-specific locations.
• If nothing is found in standard locations, it falls back to a bounded recursive search.

include filters by discovered skill directory name with standard shell-style globs.

If you need to point at a specific directory inside a repository, use the table form with subpath.

When the wheel already contains files under bub_skills/, files coming from the plugin override matching paths.

This downloads the configured skills into ./bub_skills. Use --output /path/to/dir to choose another directory.

Development

Run tests with:

python -m pytest

Build the package with:

python -m build