XF 1.5 Suggestions for how to create Chapters on long project threads


Some of our project threads can go on for years as people periodically update them with their progress. Sometimes there can be breaks of months without update, then "BAM, look what I've been up to!! :)" We want users to update their existing thread rather than create a new one each time they wake the thread up and post a significant update.
In an ideal world, I would like a way for users to be able to mark 'Chapters' in the progress of the project and it would be super-cool if there was a way to navigate these chapters within the thread
Is there a native way within Xenforo or any suggestions for how to achieve this?