A Plugin's blueprint gives Grav insight into what a plugin is, its source, support and author information, dependencies, and and form fields used to administer the plugin in the Grav Admin.
As an example, here's the Blueprint for a plugin:
There are different properties that you can use to give your resource an identity. Some are required, others are optional.
|name*||This is the name of the resource. Avoid appending Plugin or Theme, there is no need for that.|
|version*||The version of the resource. This value should always change on each release, incrementally. You should follow the semver standard, too.|
|description*||The description of your resource. Please don't exceed 200 characters. A description should be short and straight to the point. You can use markdown syntax if needed. It's also a good idea to wrap your description in quotation marks.|
|icon*||Icon is what will be used on getgrav.org. At this stage, we are using FontAwesome icons library, so if you are developing a new plugin or theme, it should be your job to ensure the icon you picked is not already used. Otherwise we will have to change it for you.|
|screenshot||(optional) Screenshot is only ever evaluated for Themes and completely ignored for Plugins. For Themes, this would be the filename of the screenshot that comes with the theme (default:
|author.name*||The developer full name|
|author.email||(optional) The developer email.|
|author.url||(optional) The developer homepage.|
|homepage||(optional) If you have a dedicated homepage for your resource, this would be the place for it.|
|docs||(optional) If you have written documentation for your resource, you can link them here.|
|demo||(optional) If you have a demo up and running about your resource, link it here.|
|guide||(optional) If you have tutorials or how-to guides for your resource, link it here.|
|keywords||(optional) Although there is no real use of keywords yet, you can list keywords relative to your resource here, comma separated.|
|bugs||(optional) The URL where bugs can be reported, usually this would be the GitHub issues link.|
|license||(optional) The type of license your resource is (MIT, GPL, etc). It is adviced that you always provide a
|dependencies||(optional) A list of dependencies that the plugin/theme requires. The default process is to use GPM to install them, however, if an optional GIT repository URL is provided, installing direct from the repository will be an option also. Also if you use an array, you can define a name and a version explicitly using Composer-style package versions|
Here is an example of the identity portion of the GitHub plugin blueprints:
name: GitHub version: 1.0.1 description: "This plugin wraps the [GitHub v3 API](https://developer.github.com/v3/) and uses the [php-github-api](https://github.com/KnpLabs/php-github-api/) library to add a nice GitHub touch to your Grav pages." icon: github author: name: Team Grav email: firstname.lastname@example.org url: http://getgrav.org homepage: https://github.com/getgrav/grav-plugin-github keywords: github, plugin, api bugs: https://github.com/getgrav/grav-plugin-github/issues license: MIT
Theme blueprints work in very much the same way as plugins.