spanr

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

  • Trace Claude Code sessions.
  • See where the time and money go.
  • Cost that reconciles with Claude Code's reported number: computed, reported, and any unexplained gap shown explicitly.
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
unexplained    $0.0237
reported       $0.5868

Computed is Spanr's figure, reported is Claude Code's, and the unexplained gap is shown explicitly.