plugins/python3-development/skills/hatchling/SKILL.md
Use when working with Hatchling — configuring build system setup, pyproject.toml metadata, dependencies, entry points, build hooks, version management, wheel and sdist builds, package distribution, setuptools migration, or troubleshooting Hatchling build errors. Covers PEP 517/518/621/660 standards.
npx skillsauth add jamie-bitflight/claude_skills hatchlingInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Hatchling is a modern, standards-compliant Python build backend that replaces legacy setuptools for package building. It provides clear configuration through pyproject.toml, intelligent defaults, and extensibility through hooks and plugins. This skill enables understanding Hatchling's architecture, configuration options, and build customization capabilities.
Consult ../python3-development/references/python3-standards.md when applying shared architecture, typing, testing, or CLI rules; full standards, graphs, and amendment process are documented there.
This skill provides comprehensive reference documentation organized by topic. Each section links to detailed guides covering configuration, usage patterns, and examples.
references/project-metadata/index.md - Package metadata, dependencies, entry points, dynamic fieldsreferences/build-system/index.md - Build backend setup, PEP 517/518, reproducible builds, environment variablesreferences/wheel-target/index.md - Wheel configuration, package discovery, file selection, editable installsreferences/sdist-target/index.md - Sdist configuration, VCS integration, legacy setup.py supportreferences/build-targets/index.md - Wheel, sdist, binary, custom builders, multi-version buildsreferences/target-config/index.md - Target-specific hooks, dependencies, versions, precedencereferences/file-selection/index.md - Git-style globs, include/exclude patterns, VCS integration, force-includereferences/build-hooks/index.md - Hook interface, execution order, custom hooks, version hooks, build data passingreferences/advanced-features/index.md - Dynamic dependencies, force-include, path rewriting, editable installs, build contextreferences/version-management/index.md - Version sources (code, regex, env), schemes, validation, build hooksreferences/metadata-hooks/index.md - Metadata hook interface, custom hooks, dynamic metadata generationreferences/context-formatting/index.md - Context variables, environment-based config, interpolationreferences/plugins/index.md - Builder, hook, metadata, version plugins, hatch-vcs, plugin developmentreferences/build-environment/index.md - Environment config, dependencies, UV vs pip, Cython integration, isolationreferences/integration/index.md - PEP standards compliance, setup.py migration, setuptools compatibility, CMake/extensionsreferences/special-config/index.md - PEP 561 type hints, SPDX licenses, namespace packages, src-layout, extensionsreferences/core-concepts/index.md - PEP 517 backend, minimal philosophy, VCS file selection, reproducible buildsreferences/standards/index.md - Python packaging overview, PEP references, metadata specs, distribution formatsreferences/cli-building/index.md - hatch build commands, python -m build, pip install, output customizationreferences/error-handling/index.md - Path validation, file selection errors, version/license validation, heuristic failuresreferences/release-notes/index.md - Hatchling version history, feature additions, PEP 639 support, performance improvementsdevelopment
When an application needs to store config, data, cache, or state files. When designing where user-specific files should live. When code writes to ~/.appname or hardcoded home paths. When implementing cross-platform file storage with platformdirs.
testing
Enforce mandatory pre-action verification checkpoints to prevent pattern-matching from overriding explicit reasoning. Use this skill when about to execute implementation actions (Bash, Write, Edit) to verify hypothesis-action alignment. Blocks execution when hypothesis unverified or action targets different system than hypothesis identified. Critical for preventing cognitive dissonance where correct diagnosis leads to wrong implementation.
tools
Reference guide for the Twelve-Factor App methodology — 15 principles (12 original + 3 modern extensions) for building portable, resilient, cloud-native applications. Use when evaluating application architecture, designing cloud-native services, reviewing codebases for methodology compliance, advising on configuration, scaling, observability, security, and deployment patterns. Incorporates the 2025 open-source community evolution and cloud-native reinterpretations of each factor.
tools
Converts user-facing documentation (how-to guides, tutorials, API references, examples) in any format — Markdown, PDF, DOCX, PPTX, XLSX, AsciiDoc, RST, HTML, Jupyter notebooks, man pages, TOML/YAML/JSON configs, and plain text — into Claude Code skill directories with SKILL.md plus thematically grouped references/*.md files. Use when given a docs directory or mixed-format documentation to transform into an AI skill. Uses MCP file-reader server for binary formats.