Skills

A skill is a package of structured files that teaches an AI coding agent how to work with a specific tool or framework. The skill below was generated by Great Docs from this project’s documentation. Install it in your agent and it will be able to run commands, edit configuration, write content, and troubleshoot problems without step-by-step guidance from you.

Any agent — install with npx:

npx skills add https://mkennedy.codes/docs/content-types/

Codex / OpenCode

Tell the agent:
Fetch the skill file at https://mkennedy.codes/docs/content-types/skill.md and follow the instructions.

Manual — download the skill file:

curl -O https://mkennedy.codes/docs/content-types/skill.md

Or browse the SKILL.md file.

SKILL.md

---
name: content-types
description: >
  A library to map file extensions to content types and vice versa. Use when writing Python code that uses the content_types package.
license: MIT
compatibility: Requires Python >=3.10.
---

# content-types

A library to map file extensions to content types and vice versa.

## Installation

```bash
pip install content-types
```

## API overview

### Forward lookup

Map a filename, bare extension, Path, or URL to its MIME / content type.

- `get_content_type`: Return the most specific, commonly accepted MIME type for a filename or extension

### Reverse lookup

Map a MIME / content type back to its file extension(s) — the inverse of get_content_type.

- `guess_extension`: Return the canonical file extension for a MIME / content type
- `guess_all_extensions`: Return every known file extension for a MIME / content type, canonical first

### Mapping data

The underlying extension -> content-type table (364 entries; keys have no leading dot).

- `EXTENSION_TO_CONTENT_TYPE`: dict() -> new empty dictionary

### Shortcut constants

Precomputed content types for very common formats, exposed as module-level attributes.

- `webp`: str(object='') -> str
- `png`: str(object='') -> str
- `jpg`: str(object='') -> str
- `mp3`: str(object='') -> str
- `json`: str(object='') -> str
- `pdf`: str(object='') -> str
- `zip`: str(object='') -> str
- `xml`: str(object='') -> str
- `csv`: str(object='') -> str
- `md`: str(object='') -> str
- `parquet`: str(object='') -> str
- `ipynb`: str(object='') -> str
- `pkl`: str(object='') -> str
- `yaml`: str(object='') -> str
- `toml`: str(object='') -> str
- `sqlite`: str(object='') -> str

## Resources

- [Full documentation](https://mkennedy.codes/docs/content-types/)
- [llms.txt](llms.txt) — Indexed API reference for LLMs
- [llms-full.txt](llms-full.txt) — Comprehensive documentation for LLMs
- [Source code](https://github.com/mikeckennedy/content-types)