[TheGreatAxios]

The trace header shows a local start time. Cost is an em dash until a span reports one, and a reported zero still shows $0. A caller can pass the whole-run step count when the loaded page is shorter than the run.

Verified with bun run check and bun run build.

Closes CL-11450

[linear-code]

CL-11450

[corbits-triage]

Triage: Pass

No changes needed from you. A maintainer will review this pull request.

Waiting on a maintainer to approve: approve.

[TheGreatAxios]

Storybook · before and after

Polish on ff6d038: a parseable start time is a local date and a local time joined with a middle dot, so the mono line does not pick up the word “at”. A clock string such as 09:14:02 is unchanged.

Gist: https://gist.github.com/TheGreatAxios/9fce55ceb929bd902ecdeff9fedf744f

Before

Observability / Views / App, after opening “Review a pull request”. repo.review · 09:14:02, cost $0.11, 17 steps.

After

The same app story is identical, because that fixture is a clock time.

Observability / Views / Run / Parseable start, ISO 2026-10-24T15:04:00.000Z: repo.review · Oct 24 · 8:04 AM (hour follows the machine time zone). No word “at”.

The step list and the timing breakdown do not mount the header. Those shots matched before and after.