Add new skill: Python PyPI Package Builder (#1302)

* Add python-pypi-package-builder skill for Python packaging

- Created `SKILL.md` defining decision-driven workflow for building, testing, versioning, and publishing Python packages.
- Added reference modules covering PyPA packaging, architecture patterns, CI/CD, testing, versioning strategy, and release governance.
- Implemented scaffold script to generate complete project structure with pyproject.toml, CI workflows, tests, and configuration.
- Included support for multiple build backends (setuptools_scm, hatchling, flit, poetry) with clear decision rules.
- Added secure release practices including tag-based versioning, branch protection, and OIDC Trusted Publishing.

* fix: correct spelling issues detected by codespell

Author: Dhruvpatel004

docs/README.skills.md

@@ -237,6 +237,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-skills) for guidelines on how to
 | [publish-to-pages](../skills/publish-to-pages/SKILL.md) | Publish presentations and web content to GitHub Pages. Converts PPTX, PDF, HTML, or Google Slides to a live GitHub Pages URL. Handles repo creation, file conversion, Pages enablement, and returns the live URL. Use when the user wants to publish, deploy, or share a presentation or HTML file via GitHub Pages. | `scripts/convert-pdf.py`<br />`scripts/convert-pptx.py`<br />`scripts/publish.sh` |
 | [pytest-coverage](../skills/pytest-coverage/SKILL.md) | Run pytest tests with coverage, discover lines missing coverage, and increase coverage to 100%. | None |
 | [python-mcp-server-generator](../skills/python-mcp-server-generator/SKILL.md) | Generate a complete MCP server project in Python with tools, resources, and proper configuration | None |
+| [python-pypi-package-builder](../skills/python-pypi-package-builder/SKILL.md) | End-to-end skill for building, testing, linting, versioning, and publishing a production-grade Python library to PyPI. Covers all four build backends (setuptools+setuptools_scm, hatchling, flit, poetry), PEP 440 versioning, semantic versioning, dynamic git-tag versioning, OOP/SOLID design, type hints (PEP 484/526/544/561), Trusted Publishing (OIDC), and the full PyPA packaging flow. Use for: creating Python packages, pip-installable SDKs, CLI tools, framework plugins, pyproject.toml setup, py.typed, setuptools_scm, semver, mypy, pre-commit, GitHub Actions CI/CD, or PyPI publishing. | `references/architecture-patterns.md`<br />`references/ci-publishing.md`<br />`references/community-docs.md`<br />`references/library-patterns.md`<br />`references/pyproject-toml.md`<br />`references/release-governance.md`<br />`references/testing-quality.md`<br />`references/tooling-ruff.md`<br />`references/versioning-strategy.md`<br />`scripts/scaffold.py` |
 | [quality-playbook](../skills/quality-playbook/SKILL.md) | Explore any codebase from scratch and generate six quality artifacts: a quality constitution (QUALITY.md), spec-traced functional tests, a code review protocol with regression test generation, an integration testing protocol, a multi-model spec audit (Council of Three), and an AI bootstrap file (AGENTS.md). Includes state machine completeness analysis and missing safeguard detection. Works with any language (Python, Java, Scala, TypeScript, Go, Rust, etc.). Use this skill whenever the user asks to set up a quality playbook, generate functional tests from specifications, create a quality constitution, build testing protocols, audit code against specs, or establish a repeatable quality system for a project. Also trigger when the user mentions 'quality playbook', 'spec audit', 'Council of Three', 'fitness-to-purpose', 'coverage theater', or wants to go beyond basic test generation to build a full quality system grounded in their actual codebase. | `LICENSE.txt`<br />`references/constitution.md`<br />`references/defensive_patterns.md`<br />`references/functional_tests.md`<br />`references/review_protocols.md`<br />`references/schema_mapping.md`<br />`references/spec_audit.md`<br />`references/verification.md` |
 | [quasi-coder](../skills/quasi-coder/SKILL.md) | Expert 10x engineer skill for interpreting and implementing code from shorthand, quasi-code, and natural language descriptions. Use when collaborators provide incomplete code snippets, pseudo-code, or descriptions with potential typos or incorrect terminology. Excels at translating non-technical or semi-technical descriptions into production-quality code. | None |
 | [readme-blueprint-generator](../skills/readme-blueprint-generator/SKILL.md) | Intelligent README.md generation prompt that analyzes project documentation structure and creates comprehensive repository documentation. Scans .github/copilot directory files and copilot-instructions.md to extract project information, technology stack, architecture, development workflow, coding standards, and testing approaches while generating well-structured markdown documentation with proper formatting, cross-references, and developer-focused content. | None |