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feat(run-journal): measure lifecycle journal ceiling for #635 - #642

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solomonneas merged 1 commit into
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codex/635-journal-ceiling-measure
Aug 1, 2026
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feat(run-journal): measure lifecycle journal ceiling for #635#642
solomonneas merged 1 commit into
mainfrom
codex/635-journal-ceiling-measure

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@solomonneas

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Summary

  • Extend scripts/measure_run_journal.py with --mode volume to report lifecycle event counts and journal bytes for scanned real runs, a representative synthetic run, and a configurable worst case (seats / attempts / pause-resume cycles).
  • Add focused measurement tests and a one-page design decision recommending a bound raise (not segmentation yet), justified by the measured numbers.
  • No production journal/runtime code changes in this PR. Design should be graded before any implementation issue is cut.

Test plan

  • brigade work verify run --target . --command "./scripts/verify" --capture brigade-work (receipt 20260801-032754-work-verify-f0e27c)
  • python scripts/measure_run_journal.py --mode volume --scan <runs-root> --output .brigade/measurements/issue-635-journal-ceiling.json
  • Grade docs/phase-635-journal-ceiling-decision.md before filing an implementation issue

Closes nothing; measurement + design for #635 only.

Made with Cursor

Extend the measurement harness with volume mode (real journal scan,
representative and worst-case synthetic runs) and record the raise-bounds
design decision before any production ceiling change.

Co-authored-by: Cursor <cursoragent@cursor.com>
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