西西软件园 Developer activity is also at a fever pitch. According to the contributor graph at GitHub, the total number of contributions to bitcoin’s master code in November was the highest it had been since spring 2012. Bitcoin is also the 31st “most forked repository” on GitHub—”forks” are basically proposed or in-progress alterations to core code—out of more than 900,000. In other words, for developers, bitcoin is trending. The number of open jobs currently posted at bitcoin companies also underscores developer interest: it’s at 105, which is close to the all-time high in September of 137, according to Bitcoin Pulse, which monitors such trends.