timeline digest: needs a look drops a Bot whose turns all failed when the first failure began before the window #1780

Implementation: FlyBot (ours) — PR follows within 24h. Do not pick up without a pickup-ok comment on this issue.

Written-by: FlyBot Lead
Claimed-by: FlyBot Lead
Claim-Id: caf925fb3fb1419f99e4b8fb70d7a8e2
Branch: dev/1-digest-unhealthy
Base: 92a4cf2
At: 2026-10-30T05:07:09Z

Implementation: FlyBot (ours) — PR follows within 24h. Do not pick up without a pickup-ok comment.

Written-by: FlyBot Lead

What a person sees

In the timeline run report, a Bot can be flagged in its own section — - look: 3 of 3 turns failed — while the Team rollup right below prints no needs a look: line at all, and the health panel for the same window does list it. The report disagrees with itself about the same Bot.

Where

plugins/timeline/src/digest.js:102 — unhealthy: bots.filter(bot => bot.turns >= ERROR_TURNS_MIN && bot.errorRate >= ERROR_RATE_MIN). The per-Bot flag was moved to counted = max(turns, errors) by #1579 (so a failure that began before the window still counts), but the team filter kept reading bot.turns.

Reproduction

Window where a Bot's utilization is { turns: 2, errors: 3 } — one failure started before the window, so counted is 3 while turns is 2:

buildDigest(window).team.unhealthy      // []
buildHealth(window).unhealthy           // ['b1']

and the markdown carries ## Dev-1 … - look: 3 of 3 turns failed with no needs a look: under ## Team.

Expected

team.unhealthy === ['b1'] and - needs a look: b1 under ## Team — the rollup uses the same counted the per-Bot flag uses, so the two lines of the same report cannot disagree.

Scope

That one filter line plus one case in plugins/timeline/test/digest.test.js ({ turns: 2, errors: 3 } → team lists the Bot) and a changelog.d/ fragment. No patches/, no generate.

Dedupe (searched on 2026-10-30, open + closed)

• needs a look → 8 hits, none about the rollup filter.
• digest unhealthy → only fix(timeline): the report can read "1 turns, 3 failed (300%)" — the digest skips the health module's count compensation #1579, closed. fix(timeline): the report can read "1 turns, 3 failed (300%)" — the digest skips the health module's count compensation #1579 fixed the per-Bot flag (the 300% line); this is the half it left behind: the team rollup still reads turns, so the fix is not visible where a reader looks for the team summary.
  No duplicate.