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Colby McHenry
b93c8d2b6c
parse-run.mjs --selftest runs the math over synthetic transcripts with known answers: attribution, message.id dedupe, compact_boundary, FIFO micro-compaction, and multi-turn stitching. It found a real bug. A gap where the window also SHED content has a delta far below what was added, which reads as absurdly dense text and dragged the whole run's ratio with it -- a shed gap in the fixture pushed 2.5 chars/tok to 4.4 and left the wrong result resident. Shedding can only push a gap's ratio up, so the calibration now takes the lower median as its centre, drops gaps well above it, and pools the rest. Runs that never shed are unaffected (gin and vscode re-measure identically). Also drafts docs/benchmarks/residual-context-occupancy.md -- method, error bar, and the limitations this metric does not settle. Baseline numbers to follow.