# ConsoleContracts Milestones

This document defines the implementation milestones for the `getphred/console-contracts` package.

## 1. Project Infrastructure
- [x] Initialize repository and `composer.json` with zero runtime dependencies.
- [x] Configure PHPUnit and static analysis (PHPStan).
- [x] Set up GitHub Actions for continuous integration.

## 2. Core Interfaces
- [x] Implement `CommandInterface` and metadata methods.
- [x] Implement `InputInterface` for argument and option access.
- [x] Implement `OutputInterface` with verbosity and semantic methods.
- [x] Implement `ConsoleMiddlewareInterface` for execution wrapping.
- [x] Implement `ConsoleExceptionInterface` for standardized errors.

## 3. Standardized Constants
- [x] Implement `Verbosity` level constants.
- [x] Implement `ExitCode` semantic constants (sysexits.h).

## 4. Helper & DX Contracts
- [x] Implement `InteractionInterface` for portable interactivity.
- [x] Implement `ProgressBarInterface`, `TableInterface`, and `MarkdownConverterInterface`.
- [x] Implement PHP 8 Attributes (`#[Cmd]`, `#[Arg]`, `#[Opt]`).
- [x] Implement `HasAttributes` trait for attribute-to-interface bridging.