reticle capsules lists what is in .reticle/capsules. A capsule is a minimal failing reproduction plus the consequence that should have held. Replay one with the reticle_flow_replay tool.
What it prints
Onereticle_capsules line: a count and an array. Real capture from this repository, trimmed to three of the seventy-nine entries and pretty-printed (the CLI prints it as a single line):