spanr

Spanr: local-first tracing and evals for Claude Code.

  • Trace Claude Code sessions.
  • See where the time and money go.
  • Cost per call and per run, computed from the transcript.
tracing
works today
evals
coming
source
open source, coming soon

Want a note when it opens? hello@spanr.dev

From a real Claude Code run.
$ spanr show

duration             76.1s
model calls              7

computed           $0.5630
not in transcript  $0.0237
reported           $0.5868

Computed is Spanr's figure, reported is Claude Code's, and the cost not visible in the transcript is shown explicitly.