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release: 0.54.0 — stop a run, and see what it is costing while it runs - #496

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Aug 20, 2026
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release: 0.54.0 — stop a run, and see what it is costing while it runs#496
danielgwilson merged 1 commit into
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release/0.54.0

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release: 0.54.0 — stop a run, and see what it is costing while it runs

The two gaps the design artifact listed as still open.

  • STOP THIS RUN, armed and confirmed like a live start. It signals the
    process GROUP (a run is detached into its own group and has children)
    with SIGTERM, so the run's own handlers finalize. Stopping the process
    is not stopping the sandboxes, and it says so — Reclaim is what ends
    those.
  • LIVE COST. A run in flight reported its cost as unknown until the
    moment it ended, which is the half where knowing changes what you do.
    The running usage now travels with the trace into the mid-run flush,
    priced by the same estimator as the final figure.

Proven on a real run: ~$0.10 estimated mid-flight, climbing to ~$0.20,
then Stop ended it.

The two gaps the design artifact listed as still open.

  - STOP THIS RUN, armed and confirmed like a live start. It signals the
    process GROUP (a run is detached into its own group and has children)
    with SIGTERM, so the run's own handlers finalize. Stopping the process
    is not stopping the sandboxes, and it says so — Reclaim is what ends
    those.
  - LIVE COST. A run in flight reported its cost as unknown until the
    moment it ended, which is the half where knowing changes what you do.
    The running usage now travels with the trace into the mid-run flush,
    priced by the same estimator as the final figure.

Proven on a real run: `~$0.10 estimated` mid-flight, climbing to `~$0.20`,
then Stop ended it.
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@danielgwilson
danielgwilson merged commit 4637b7c into main Aug 20, 2026
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danielgwilson deleted the release/0.54.0 branch August 20, 2026 19:06
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