ScaffoldBench

RunOpus 5.5repeat 1

Gated-execute on Run the major-incident runbook for a CI outage

claude-opus-5-5__gated-execute__support-major-incident__r1

Score

0.820

wrong answer
design ran as designed
Cost
$1.01
Latency
4m 5s
setup 0.0s, grading 0.0s
Turns
162
Tool calls
127
Subagents
17
Tokens in / out
620k / 17k
525,788 read from cache

Did the design run?

every check held
  • Run completed: heldharness.run-completedThe environment was built, the architecture returned and grading finished, none of them throwing.
  • No API failures: heldharness.apiNo model call failed at the API.
  • Every call ended: heldharness.calls-endedEvery call ended with a result, or was stopped by the run's own limits.
  • No harness tool denied: heldharness.harness-toolsThe sandbox guard never denied a harness tool, nor a tool the session itself offered.
  • Tool servers connected: heldharness.mcp-connectedEvery tool server the harness gave a call was connected when the session started.
  • No foreign tool servers: heldharness.mcp-hermeticNo call loaded a tool server the harness did not give it.
  • Builtin tools: heldharness.builtin-toolsA check recorded with the run.
  • Structured replies arrived: heldharness.structured-outputEvery call that asked for structured output and ran to the end got it.
  • No silent fallbacks: heldharness.not-degradedNo phase fell back on a default (an empty plan, a default winner) instead of its output.
  • Every state change was reviewed: heldgated-execute.reviewedEvery call that changed the world had been allowed by a review before it ran, counted from the world’s own journal.
  • Every decision was read: heldgated-execute.decisionsEvery review that ran to its end gave its decision through the schema; an unreadable one is a denial.
  • Each call was shown the right tools: heldgated-execute.toolsThe executor was shown the task’s full toolset and each reviewer the read-only tools.

Phases

Execute: 0.0s to 4m 5s, finished, 44 tool calls, $0.255
Review 1: create_incident: 28.0s to 37.9s, finished, 3 tool calls, $0.037
Review 2: page_engineer: 40.7s to 49.1s, finished, 5 tool calls, $0.034
Review 3: assign_incident_role: 52.7s to 1m 1s, finished, 5 tool calls, $0.033
Review 4: link_to_incident: 1m 1s to 1m 16s, finished, 13 tool calls, $0.078
Review 5: set_severity: 1m 19s to 1m 28s, finished, 5 tool calls, $0.039
Review 6: set_severity: 1m 28s to 1m 39s, finished, 4 tool calls, $0.042
Review 7: set_severity: 1m 39s to 1m 49s, finished, 4 tool calls, $0.040
Review 8: set_severity: 1m 49s to 1m 59s, finished, 5 tool calls, $0.048
Review 9: set_severity: 1m 59s to 2m 7s, finished, 4 tool calls, $0.040
Review 10: set_severity: 2m 7s to 2m 16s, finished, 4 tool calls, $0.040
Review 11: set_severity: 2m 16s to 2m 23s, finished, 2 tool calls, $0.032
Review 12: extend_sla: 2m 30s to 2m 42s, finished, 5 tool calls, $0.049
Review 13: extend_sla: 2m 42s to 2m 55s, finished, 6 tool calls, $0.050
Review 14: assign_incident_role: 2m 55s to 3m 6s, finished, 6 tool calls, $0.047
Review 15: post_status_update: 3m 9s to 3m 18s, finished, 4 tool calls, $0.041
Review 16: create_ticket: 3m 30s to 3m 41s, finished, 4 tool calls, $0.049
Review 17: post_comment: 3m 44s to 3m 56s, finished, 4 tool calls, $0.057

Drawn from the phase records: timing and cost per call, no tool calls or messages.

PhaseDurationCostTurnsToolsModel
Execute4m 5s$0.2554544claude-opus-5-5
Review 1: create_incident9.9s$0.03753claude-opus-5-5
Review 2: page_engineer8.4s$0.03475claude-opus-5-5
Review 3: assign_incident_role7.9s$0.03375claude-opus-5-5
Review 4: link_to_incident15.4s$0.0781513claude-opus-5-5
Review 5: set_severity9.4s$0.03975claude-opus-5-5
Review 6: set_severity10.2s$0.04264claude-opus-5-5
Review 7: set_severity10.5s$0.04064claude-opus-5-5
Review 8: set_severity9.5s$0.04875claude-opus-5-5
Review 9: set_severity8.8s$0.04064claude-opus-5-5
Review 10: set_severity8.9s$0.04064claude-opus-5-5
Review 11: set_severity6.8s$0.03242claude-opus-5-5
Review 12: extend_sla12.4s$0.04975claude-opus-5-5
Review 13: extend_sla12.7s$0.05086claude-opus-5-5
Review 14: assign_incident_role11.3s$0.04786claude-opus-5-5
Review 15: post_status_update8.9s$0.04164claude-opus-5-5
Review 16: create_ticket10.8s$0.04964claude-opus-5-5
Review 17: post_comment12.1s$0.05764claude-opus-5-5

The call-by-call replay is not published for this run. Traces are large, so the repository keeps 9 of this run set’s 900 and leaves the rest out; the score, phases and final answer on this page come from the committed run record.

Runs you can replay

Record this cell yourself: npm run bench -- run --strategies gated-execute --tasks support-major-incident --models claude-opus-5-5 --repeats 1

Score breakdown

  • passAn incident is open for the build pipeline
    1.00weight 0.04
  • passThe incident-command engineer on call now commands the incident
    1.00weight 0.08

    commander=E-401 (expected E-401)

  • passThe commander was paged
    1.00weight 0.04
  • passT-3101 linked to the incident
    1.00weight 0.04
  • passT-3101 kept open, raised to sev1 with its deadline intact
    1.00weight 0.02

    status=open severity=sev1 due=2026-03-30T18:52:00Z (expected sev1, 2026-03-30T18:52:00Z)

  • passT-3102 linked to the incident
    1.00weight 0.04
  • passT-3102 kept open, raised to sev1 with its deadline intact
    1.00weight 0.02

    status=open severity=sev1 due=2026-03-30T18:58:00Z (expected sev1, 2026-03-30T18:58:00Z)

  • passT-3103 linked to the incident
    1.00weight 0.04
  • passT-3103 kept open, raised to sev1 with its deadline intact
    1.00weight 0.02

    status=open severity=sev1 due=2026-03-30T19:01:00Z (expected sev1, 2026-03-30T19:01:00Z)

  • passT-3104 linked to the incident
    1.00weight 0.04
  • passT-3104 kept open, raised to sev1 with its deadline intact
    1.00weight 0.02

    status=open severity=sev1 due=2026-03-31T15:05:00Z (expected sev1, 2026-03-31T15:05:00Z)

  • passT-3105 linked to the incident
    1.00weight 0.04
  • passT-3105 kept open, raised to sev1 with its deadline intact
    1.00weight 0.02

    status=open severity=sev1 due=2026-04-01T15:07:00Z (expected sev1, 2026-04-01T15:07:00Z)

  • passT-3106 linked to the incident
    1.00weight 0.04
  • passT-3106 kept open, raised to sev1 with its deadline intact
    1.00weight 0.02

    status=new severity=sev1 due=2026-03-30T16:20:00Z (expected sev1, 2026-03-30T16:20:00Z)

  • passT-3109 linked to the incident
    1.00weight 0.04
  • passT-3109 kept open, raised to sev1 with its deadline intact
    1.00weight 0.02

    status=new severity=sev1 due=2026-03-30T16:20:00Z (expected sev1, 2026-03-30T16:20:00Z)

  • failT-3112 linked to the incident
    0.00weight 0.04
  • failT-3112 kept open, raised to sev1 with its deadline intact
    0.00weight 0.02

    status=new severity=unset due=- (expected sev1, 2026-03-30T16:20:00Z)

  • failT-3113 linked to the incident
    0.00weight 0.04
  • failT-3113 kept open, raised to sev1 with its deadline intact
    0.00weight 0.02

    status=open severity=sev3 due=2026-03-31T15:13:00Z (expected sev1, 2026-03-31T15:13:00Z)

  • failT-3114 linked to the incident
    0.00weight 0.04
  • failT-3114 kept open, raised to sev1 with its deadline intact
    0.00weight 0.02

    status=open severity=sev3 due=2026-03-31T15:16:00Z (expected sev1, 2026-03-31T15:16:00Z)

  • passThe engineer covering comms right now is the communications lead
    1.00weight 0.08

    comms=E-803 (expected E-803)

  • passA status update in the runbook form, with the next update due within 30 minutes
    1.00weight 0.08
  • passA postmortem ticket for the service, linked to the incident, due at close of business five business days on
    1.00weight 0.08

    T-3115 due=2026-04-08T17:00:00Z

Penalties

No penalties were applied.

Scorer metadata

tool calls
127
failed tool calls
1
distinct tools
20

Final answer

I've set up the outage as major incident INC-1 and followed the current runbook (KB-40) step by step. The older 2025 runbook (KB-39) has been replaced, so I didn't use it. Desk time was 2026-03-30 15:20 UTC.

  1. Incident opened: INC-1 (build-pipeline) was opened at 15:20, before I contacted anyone.
  2. Commander paged: I paged E-401 Priya Raman, who is on incident-command right now, and made her incident commander. As the runbook says, I didn't pick her based on any ticket deadline.

  3. Reports linked: I linked the seven reports of the runner outage to INC-1: T-3101, T-3102, T-3103, T-3104, T-3105, T-3106 and T-3109.

    • Not linked: T-3107 (a flaky payments-service test from before the outage) and T-3108 (a local build broken by an Xcode upgrade). Knowledge base articles KB-41 and KB-42 say neither is related to runner capacity.
  4. Severity: all seven linked reports are now sev1. Existing deadlines stand. T-3106 and T-3109 had no deadline, so I gave them the handbook default: triage time plus the 60-minute sev1 target, which is 16:20 UTC.
  5. Comms lead: Mia Laurent (E-801) is on the comms rota but on sick leave, so the backup rotation (comms-secondary) covers. I named E-803 Elif Demir, who is on call there now.
  6. First status update (published to the status page): "Impact: All CI builds company-wide are failing; no build runners are picking up jobs in any pool. Started: 14:52 UTC. Next update: 15:50 UTC."
  7. Postmortem ticket: T-3115 is linked to INC-1 and due 2026-04-08 17:00 UTC. That's close of business on the 5th business day after the incident, skipping the Good Friday and Easter Monday holidays.

Things you should know:

  • The next status update is due by 15:50 UTC. It needs to come from the comms lead or the next run.
  • I didn't merge any duplicate reports. The runbook says to link every report to the incident, and it overrides the handbook during an incident.
  • T-3115 has no owner or severity yet. The owner should be whoever is on call for platform-primary at the deadline, but no shift is published for that time. I left the severity unset because it's a follow-up task, not a live outage report. I added a comment on the ticket explaining both.

Provenance of the numbers on this page

run set
scaffold-or-scale-v1
models
Haiku 4.5, Sonnet 5.5, Opus 5.5
effort
high
repeats
2
fixtures
replay
runs
900 / 900
strategy cost
$354.44
judge cost
$9.19
wall clock
9h 48m
git
fce5807b2d

Cost excludes judge calls, which are tracked separately so a scoring model never flatters or penalises an architecture. Every figure on this site is read from results/ at build time.