brunch/brunch — comment on commit 6bcb7776d8bd5cca4f02670c8ecd8d0ceba9f6dd
File: src/brunch.coffee line 12
By paulmillr:

Starting from f903e7b723afd7f9900eb57f93d07bc612ec1818, brunch will check (in duck typing way) if dependency is brunch plugin and fail silently otherwise.