# constutil

> Typed constant definitions and groups for Python 3.12+, with no runtime dependencies.

ConstDef stores a scalar value and display name; ConstGroup provides ordered
lookup and enumeration. Comparisons use Python equality without coercion or case
folding. Derive groups directly from generic specializations; do not extend
populated groups. The optional skill recommends a constants package layout.

## Documentation

- [README and API](https://constutil.patchfork.dev/index.md):
  examples, behavior, compatibility, and setup.
- [Full context](https://constutil.patchfork.dev/llms-full.txt):
  README and skill instructions together.

## Skills

- [Installer](https://constutil.patchfork.dev/install-skills.sh):
  install the shared skill for Codex, Claude Code, or both.

- [constutil skill](https://constutil.patchfork.dev/skills/constutil/SKILL.md):
  shared Codex and Claude Code conventions, lookup, and existence checks.
- [Codex metadata](https://constutil.patchfork.dev/skills/constutil/agents/openai.yaml):
  optional skill discovery metadata.

## Examples

- [Running examples](https://constutil.patchfork.dev/examples/README.md):
  uv commands and expected behavior.
- [Days](https://constutil.patchfork.dev/examples/days.py): integer choices and validation.
- [Saturn moons](https://constutil.patchfork.dev/examples/saturn_moons.py):
  string choices and typed metadata.