The stats layer reads usage/duration only from run.end, but neither
framework populated them, so tokens/cost/avg-duration were always 0.
- hermes: accumulate token usage across each run's api-result calls in
session state and attach the summed usage plus a computed duration_ms
(from a stored runStartedAt) onto run.end. metric.snapshot emission is
unchanged, so there is no double counting.
- claude-code: store runStartedAt and use it as a duration_ms fallback at
all run.end sites. Usage is unavailable from CC hook inputs.
Live verification: a real hermes run now reports duration_ms and
total_tokens on run.end; dashboard tokens_today/avg_duration_ms, both
previously 0, now populate. cost_today stays 0 (no provider emits cost
through the hooks).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
William Valentin