Hi, After loading this: https://pharo.fogbugz.com/f/cases/15196/Simple-before-and-after-links-with-m... <https://pharo.fogbugz.com/f/cases/15196/Simple-before-and-after-links-with-m...> Simple after and before MetaLinks are taken into account, with just one check in #visitNode of the ASTTranslator that is false when no links are there. (which means this slice should not impact anything) For now this is for very simple MetaLinks: no parameters, no condition, no reification, no #instead/around, no meta-level modelling. Here is a trivial example: 1) get a AST node from our example method: sendNode := (ReflectivityExamples>>#exampleMethod) ast body statements first value. 2) then we define a link that is just #halt: link := MetaLink new metaObject: Halt; selector: #now. 3) we set it: sendNode link: link. 4) when we now execute the method, we get a halt: ReflectivityExamples new exampleMethod 5) to get rid of it, uninstall the link: link uninstall. If you look at the byte code, you see that it compiles the link to the code: 25 <20> pushConstant: Halt 26 <D1> send: now Marcus