# Getting Started

## What This Project Does

This repository is a small Java example set centered on file headers and source-file documentation patterns. The classes are intentionally minimal, so the main thing to learn here is how the codebase records metadata, changelog entries, and license/header variations rather than how it implements business logic.

## Recommended Reading Order

1. [Repository overview](../overview.md) — get the high-level picture first.
2. [`WithHeader.java`](../../src/main/java/WithHeader.java) — read the compact “standard header” example.
3. [`MitLicense.java`](../../src/main/java/MitLicense.java) — see the license-header pattern.
4. [`NoHeader.java`](../../src/main/java/NoHeader.java) — compare the bare-minimum file shape.
5. [`PartialHeader.java`](../../src/main/java/PartialHeader.java) — review the partially filled header style.
6. [`Crosslink.java`](../../src/main/java/Crosslink.java) — look at an example with inline change markers.
7. [`LongHeader.java`](../../src/main/java/LongHeader.java) — finish with the most verbose header example.

## Key Entry Points

There are no highly referenced classes or deep runtime entry points in this repository. Start with the Java files below because they represent the core examples:

- [`WithHeader.java`](../../src/main/java/WithHeader.java)
- [`MitLicense.java`](../../src/main/java/MitLicense.java)
- [`NoHeader.java`](../../src/main/java/NoHeader.java)
- [`PartialHeader.java`](../../src/main/java/PartialHeader.java)
- [`Crosslink.java`](../../src/main/java/Crosslink.java)
- [`LongHeader.java`](../../src/main/java/LongHeader.java)

## Project Structure

The codebase is flat and intentionally simple:

- `src/main/java/` contains the Java example classes.
- `.codewiki/overview.md` describes the repository at a high level.
- `.codewiki/tree.json` captures the generated content tree for the wiki.

A useful mental model is:

- one repository
- a small set of independent example classes
- no visible package layering, service layer, or application bootstrap

## Configuration

No build files or application config files were surfaced in the indexed repository contents. That usually means there is no meaningful runtime configuration to learn yet, or that the repository is being used primarily as a documentation/example corpus.

If you need to understand how this code is built or validated, check for common project files such as:

- `pom.xml` or `build.gradle` for Java build configuration
- `.github/workflows/` for CI rules
- `README.md` or additional `.codewiki/*.md` pages for project-specific instructions

## Common Patterns

The repository is dominated by file-header conventions. As you read the examples, look for these recurring patterns:

- **Header-first files** — most classes begin with a block comment that carries a title, version, or short description.
- **Localized metadata** — some headers use Japanese labels and descriptions.
- **Change markers** — `Crosslink.java` includes inline `ADD START` / `ADD END` notes around a field.
- **Minimal class bodies** — the Java classes themselves are mostly empty, which keeps the header format in focus.
- **One-file-per-example structure** — each class demonstrates one documentation style in isolation.

## Where to Start as a New Engineer

If you just joined the team, do this first:

1. Read [`WithHeader.java`](../../src/main/java/WithHeader.java) and [`MitLicense.java`](../../src/main/java/MitLicense.java) to learn the expected header style.
2. Compare them with [`NoHeader.java`](../../src/main/java/NoHeader.java) and [`PartialHeader.java`](../../src/main/java/PartialHeader.java) to understand what is optional or missing.
3. Use [`Crosslink.java`](../../src/main/java/Crosslink.java) and [`LongHeader.java`](../../src/main/java/LongHeader.java) to see how change history is recorded when headers grow over time.

There is no obvious application flow to trace, so your fastest path is to understand the documentation conventions the repository is demonstrating.