# Getting Started

## What This Project Does

This repository is a small Java source set used to document and compare file header styles. The code appears to be intentionally minimal: each class is a standalone example, and the main value of the project is in the comments, metadata, and formatting patterns rather than runtime behavior.

If you are new here, think of this codebase as a collection of reference fixtures. The fastest way to understand it is to read the source files side by side and notice how each one handles headers, version markers, and licensing text.

## Recommended Reading Order

1. [Repository overview](../overview.md) — start here for the high-level picture.
2. [Source tree](../tree.json) — use this to confirm what exists and where it lives.
3. The Java examples in this order:
   - [`NoHeader.java`](../../src/main/java/NoHeader.java)
   - [`WithHeader.java`](../../src/main/java/WithHeader.java)
   - [`PartialHeader.java`](../../src/main/java/PartialHeader.java)
   - [`MitLicense.java`](../../src/main/java/MitLicense.java)
   - [`Crosslink.java`](../../src/main/java/Crosslink.java)
   - [`LongHeader.java`](../../src/main/java/LongHeader.java)

That sequence moves from the simplest file to the most verbose one, which makes the header differences easier to spot.

## Key Entry Points

There are no highly referenced classes in this codebase, so there is no single “main” abstraction to learn first. Instead, the most useful entry points are the representative sample files:

- [`NoHeader.java`](../../src/main/java/NoHeader.java) — the baseline case with no file header.
- [`WithHeader.java`](../../src/main/java/WithHeader.java) — a compact example with a standard-looking header block.
- [`PartialHeader.java`](../../src/main/java/PartialHeader.java) — a partially filled localized header.
- [`MitLicense.java`](../../src/main/java/MitLicense.java) — a short license-focused header.
- [`Crosslink.java`](../../src/main/java/Crosslink.java) — shows a header plus inline change markers.
- [`LongHeader.java`](../../src/main/java/LongHeader.java) — the stress case with a very long revision history.

## Project Structure

The repository is organized as a very small Java source tree plus generated documentation:

- [`src/main/java`](../../src/main/java) — Java sample classes.
- [`.codewiki/overview.md`](../overview.md) — top-level generated summary.
- [`.codewiki/tree.json`](../tree.json) — machine-readable repository tree.
- [`.codewiki/guides/`](.) — guide pages like this one.

There is no detected application framework, service layer, or module hierarchy. Each Java file stands on its own.

## Configuration

There are no obvious runtime configuration files in the repository. The most relevant “configuration” is the source-file metadata itself:

- File headers in [`WithHeader.java`](../../src/main/java/WithHeader.java) and [`LongHeader.java`](../../src/main/java/LongHeader.java) show version/history conventions.
- [`PartialHeader.java`](../../src/main/java/PartialHeader.java) shows localized documentation fields.
- [`MitLicense.java`](../../src/main/java/MitLicense.java) shows license text in the header.

If you are adding new files, follow the same header style already used in the file family you are working with.

## Common Patterns

A few patterns repeat throughout the codebase:

- **Standalone classes** — each file defines one simple public class.
- **Header-first documentation** — metadata lives in block comments at the top of the file.
- **Version markers** — several classes include version strings such as `v72.00.00`.
- **Localized comments** — some headers use Japanese text for module and function descriptions.
- **Minimal class bodies** — the class implementations are intentionally tiny, which keeps the focus on documentation structure.

## How to Start Reading

If you only have a few minutes, read these files in order:

1. [`NoHeader.java`](../../src/main/java/NoHeader.java)
2. [`WithHeader.java`](../../src/main/java/WithHeader.java)
3. [`PartialHeader.java`](../../src/main/java/PartialHeader.java)
4. [`MitLicense.java`](../../src/main/java/MitLicense.java)
5. [`Crosslink.java`](../../src/main/java/Crosslink.java)
6. [`LongHeader.java`](../../src/main/java/LongHeader.java)

That path gives you the clearest mental model of the repository: the classes are examples, and the documentation style is the real subject.