#JavaScript Telemetry: observation volume on per-session rollups Carries generation-side observation volume and type mix on the observer_turn_rollup event so cache-value KPIs survive the migration off the legacy per-occurrence session_compressed / context_injected streams. What's new observer_turn_rollup now sums observations_created and the obs_type_* family (bugfix / discovery / decision / refactor / other) across every compression turn in a session. Paired with total_cost_usd, this makes c...

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