Function ssm_tail_midchunk_enabled 

pub fn ssm_tail_midchunk_enabled() -> bool

2026-09-25: Mid-chunk SSM tail capture: on unless --no-ssm-tail-midchunk or METRALE_SSM_TAIL_MIDCHUNK=0. While it is on the scheduler does not end chunks at ssm_tail_boundary, and prepare_midchunk_capture (metrale-model-engine) plans an in-pass capture there, which it does only on metrale_scale builds. Resolved on first call and cached.