[TimeToBuildBob]

Summary

Fix a contained zero-duration marker blocking a short-gap comparison without removing standalone zero-duration bridges.

• Skip a zero marker only when its timestamp is inside the preceding retained event's half-open span, before the existing pairwise pass.
• Preserve standalone and endpoint markers, positive-event midpoint rules, equal-data merging and later-wins normalization.
• Keep Python and Rust paired: fix(transform): skip contained zero markers without losing flood bridges aw-server-rust#858.

Fixes #201.

Verification

• Erik's counterexample A(0,1), X(5,0), B(10,1) failed on the prior PR (2s); now retains the exact existing 11s bridge.
• Original reporter fixture still totals 10s with and without the contained marker, and is idempotent.
• Standalone, endpoint, nested-positive and later-wins/prefix-maximum controls remain unchanged.
• Flood tests: 20 passed. Full Python suite: 435 passed, 5 skipped. An initial full run hit the existing random test-bucket ID collision; a fresh full rerun passed.
• Ruff format/check, diff check and enabled commit hooks pass. Rebased onto fetched upstream master.

Design boundary

A running maximum end is deliberately not used to change positive-event midpoint/threshold semantics. For A[0,10], X[5,7], B[12,13], the established split is 9.5, not 11. Likewise A[0,10], X[5,6], Z[8,8], B[12,13] needs Z retained because the later-wins X has already superseded A. Prefix-max marker filtering would remove a valid bridge. This repair is scoped to the reported contained-zero defect, not a flood rewrite.

Synthetic transform coverage; not a released-server/query-engine acceptance claim. Merge and containing release remain outstanding.

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; no blocking issue was found.

Summary

flood now skips zero-duration markers inside the preceding retained event before comparing neighbouring events.

• Contained zero markers no longer interrupt nearby gap filling.

_{Reviews (2) · Last reviewed commit: "fix(transform): preserve standalone zero..." · Reviewed by Greptile}

[TimeToBuildBob]

Superseded after Erik’s batch review: the previous blanket zero-duration filter lost standalone bridges. Repaired in 3e7f59a; the PR body now records the paired fix and regression controls. Awaiting current-head CI/review, not ready solely on the old green checks.

[TimeToBuildBob]

🤖 AI code review

Adds a preprocessing pass to flood() that removes zero-duration events whose timestamps fall within the preceding retained event's half-open span. Adds four regression tests covering contained markers, standalone bridges, markers following nested positive events, and endpoint markers.

Safe to merge — no P0/P1 findings

Confidence 5/5

✅ No findings. The diff looks correct to me on this pass.

Files changed (2) — the diff as I read it

• aw_transform/flood.py — Adds visible_events filtering before pairwise flooding and documents the treatment of contained, standalone, and endpoint zero-duration markers.
• tests/test_flood.py — Adds four tests asserting flooding results for contained markers, standalone bridges, markers after later-wins events, and endpoint markers.

Previous review passes

commit	score	findings	engine	when
bbfb5456f075	5/5	0	subscription	2026-11-07 00:43 UTC

_{Reviewed 3e7f59a55b91 · panel: codex:gpt-6.1-sol + claude-code:sonnet · subscription engine · 58s · about this reviewer}

_{Maintainer commands}

_{@TimeToBuildBob review (own line) — fresh review · @TimeToBuildBob fix — a worker acts on the findings. Once per comment; 👀 = received.}

[TimeToBuildBob]

Correction (2026-11-07 audit): the earlier ready claim used Greptile 5/5 on pre-rework bbfb545 and was invalid. Refreshed through greptile-helper on the actual head.

Verified 2026-11-07 19:39 UTC: current head 3e7f59a; Greptile now explicitly reviews that exact commit at 5/5 (updated 19:36:48Z), current-head checks SUCCESS, MERGEABLE, zero review threads. Maintainer merge remains separate; this is not a released-server acceptance claim. Any new push invalidates this readiness evidence.

[TimeToBuildBob]

@greptileai review

[TimeToBuildBob]

CI-green and mergeable (Greptile 5/5) — waiting only on a maintainer click.

This PR is ready to merge, but the bot has pull-only access to this repo and can't self-merge — surfacing it here so it isn't lost. The monitoring loop will stop re-flagging it now that this note is posted.