[JacobStephens2]

Summary

tool interval
  Session trace
    completed → span.start .. span.end
    running   → start record .. now
  old Session log only → scoped Command-log match

Preserve overlapping calls and fractional timestamps across Harnesses. For died Commands, size the historical axis from retained trace times so completed tool bars remain visible.

Closes #989

Test seams

• Console HTTP Waterfall route with retained Command and Session-trace files.
• Console browser Waterfall bars and their shared time axis.

Evidence

• Before: the span fixture produced no tool rows; an added 500-microsecond case rounded its duration to zero.
  After: cargo test --test console waterfall_ passes all 5 tests, including span times, scoped running records, incomplete live tails, sub-millisecond precision and legacy Claude/Codex matching.
• Before: the Spec reviewer's exact Python command failed because completed spans after a died Command's last Command-log line had zero-width bars.
  After: the same test, retained as python3 console/reproductions/waterfall-trace-axis.py, passes with visible completed bars and unchanged measured durations.
• node --test console/tests/waterfall.test.cjs: 2 tests pass at 1200 px and 390 px, covering overlapping measured bars, live start records, died Commands and legacy matching.
• cargo check --all-targets, cargo clippy --all-targets -- -D warnings, and cargo fmt --check pass.
• /usr/bin/time -p scripts/affected-tests origin/issue-700 selected cargo nextest run: 2,278 tests passed, 3 skipped, across 53 binaries. Wall time: 2,362.83 seconds (39m 23s), including 24.95 seconds of incremental compilation.

Review coverage

Independent Standards and Spec reviews used fetched issue-700 at d56453d5541b879cd04a4f202aa2937dc14ba3d6. Both reviewers read all 12 changed files, including the retained reproduction added during fixes. Unread changed files: none. Generated-output exclusions: none.

Merge Danger

Door: two-way

Read-only Console rendering change; no stored-data migration.

Blast Radius: Console

Unaddressed findings

Standards

None. The optional repeated fixture setup finding was addressed with shared retained-Command and Console-start helpers.

Spec

None. The P2 died-Command axis finding was reproduced with the reviewer's exact command, fixed, and retained as an HTTP reproduction plus browser regression.

Built with codex · gpt-6.1-sol · xhigh