ScaffoldBench

RunOpus 5.5repeat 1

Plan-execute-verify on Triage a new service desk ticket

claude-opus-5-5__plan-execute-verify__support-easy__r1

Score

1.000

passed
design ran as designed
Cost
$0.136
Latency
36.3s
setup 0.0s, grading 0.0s
Turns
19
Tool calls
14
Subagents
0
Tokens in / out
55k / 2.6k
41,520 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.
  • The plan was a plan: heldplan-execute-verify.planThe planner’s reply was read through its schema and held at least one step.
  • Every verdict was read: heldplan-execute-verify.verdictsEvery review round ended with a verdict read from the schema reply, not a default.
  • The loop did what its verdicts said: heldplan-execute-verify.loopEvery verdict that called for a revision got one, and nothing was revised without such a verdict.
  • Each call was shown the right tools: heldplan-execute-verify.toolsThe planner was shown no tools, the verifier the read-only ones, and the executor and reviser the full toolset.

Phases

Plan: 0.0s to 12.0s, finished, 0 tool calls, $0.022
Execute: 12.0s to 27.7s, finished, 8 tool calls, $0.056
Verify: 27.7s to 36.3s, finished, 6 tool calls, $0.058

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

PhaseDurationCostTurnsToolsModel
Plan12.0s$0.02220claude-opus-5-5
Execute15.6s$0.05698claude-opus-5-5
Verify8.7s$0.05886claude-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 plan-execute-verify --tasks support-easy --models claude-opus-5-5 --repeats 1

Score breakdown

  • passSeverity matches the escalation matrix for the service and impact scope
    1.00weight 0.27

    severity=sev3 (matrix says sev3)

  • passSLA deadline is the triage time plus the response target for that severity
    1.00weight 0.27

    sla_due_at=2026-03-17T17:20:00Z (expected 2026-03-17T17:20:00Z)

  • passAssigned to the engineer on call for the owning rotation at the deadline
    1.00weight 0.27

    assignee=E-301 (expected E-301)

  • passTicket left in status open
    1.00weight 0.09
  • passEscalation matrix read before the severity was set
    1.00weight 0.09

Penalties

No penalties were applied.

Scorer metadata

tool calls
14
failed tool calls
0
distinct tools
9

Final answer

I triaged T-1041 and checked the ticket afterwards to confirm the changes. It is now sev3, due 2026-03-17T17:20:00Z, assigned to E-301 Yuki Sato, and its status moved from new to open.

  • Severity: The ticket is for the VPN service and affects one team. The escalation matrix rates VPN with team impact as sev3. About nine people on the Berlin sales floor can't connect, so team impact fits.
  • Deadline: The ticket had no deadline. I triaged it at 2026-03-17T09:20:00Z by the service desk clock, and sev3 has a 480-minute response target. 09:20Z plus 8 hours gives 17:20Z.
  • Assignee: The network-primary rotation owns the VPN service. At the 17:20Z deadline, its on-call engineer is E-301 Yuki Sato, whose shift runs from 08:00Z to 20:00Z. The deadline is well inside that shift, so there's no handover to worry about.

The ticket didn't ask for a particular severity or engineer, so nothing conflicted with the rules. I made no other changes and touched no other ticket.

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.