Feature request: fallback / conditional transforms for summary string templates

Feature request: fallback / conditional transforms for summary string templates: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). I'm using summary string templates with filter syntax to format entry summaries. Right now I can use upper, lower and date('<format '), which is…

The task

I'm using summary string templates with filter syntax to format entry summaries. Right now I can use upper, lower and date('<format>'), which is great, but I keep running into two cases that aren't covered. 1. Fallback when a field is empty Some entries in my collection don't…

Part of XiaomiMiMo/MiMo-V2.6-RL-oss.