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SilverBullet at its core is bare bones in terms of functionality, most of its power it gains from plugs.
Plugs are an extension mechanism (implemented using a library called PlugOS) that runs “plug” code in the browser using web workers.
Plugs can hook into SB in various ways:
- Extend the Markdown parser and its syntax
- Define new commands and keybindings
- Respond to various events triggered either on the server or client-side
- Run recurring and background tasks.
- Define their own extension mechanisms through custom events
Each plug runs in its own sandboxed environment and communicates with SB via syscalls that expose a vast range of functionality. Plugs can be loaded, unloaded, and updated without having to restart SilverBullet itself.
Plugs are distributed as self-contained JavaScript bundles (ending with .plug.js). SilverBullet will load all core plugs bundled with SB itself (listed below), as well as any additional plugs stored in the _plug folder in your Spaces. Typically, management of plugs in the _plug folder is done using Plug Management.
Core plugs
These plugs are distributed with SilverBullet and are automatically enabled:
plug where uri = null order by name render [[internal-template/plug]]
Third-party plugs
These plugs are written either by third parties or distributed separately from the main SB distribution.
plug where uri != null order by name render [[internal-template/plug]]
Want to develop your own plugs? Have a look at Plugs/Development.