ScaffoldBench

RunSonnet 5.5repeat 1

Propose-select on Triage a new service desk ticket

claude-sonnet-5-5__propose-select__support-easy__r1

Score

1.000

passed
design ran as designed
Cost
$0.148
Latency
31.8s
setup 0.0s, grading 0.0s
Turns
29
Tool calls
23
Subagents
3
Tokens in / out
76k / 5.0k
47,930 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.
  • All three proposers ran: heldpropose-select.proposalsThree proposers ran in parallel, each from its own angle, and none was starved while another ran.
  • The selector chose: heldpropose-select.selectionThe selector picked a proposal by a valid number, read from its schema reply and not a default.
  • Each call was shown the right tools: heldpropose-select.toolsEach proposer was shown the read-only tools, the selector none, and the executor the full toolset.

Phases

Proposal 1 (policy-first): 0.0s to 14.1s, finished, 6 tool calls, $0.032
Proposal 2 (state-first): 0.0s to 9.7s, finished, 5 tool calls, $0.030
Proposal 3 (outcome-first): 0.0s to 9.7s, finished, 5 tool calls, $0.029
Select: 14.1s to 22.7s, finished, 0 tool calls, $0.027
Execute: 22.7s to 31.8s, finished, 7 tool calls, $0.030

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

PhaseDurationCostTurnsToolsModel
Proposal 1 (policy-first)14.1s$0.03276claude-sonnet-5-5
Proposal 2 (state-first)9.7s$0.03065claude-sonnet-5-5
Proposal 3 (outcome-first)9.7s$0.02965claude-sonnet-5-5
Select8.6s$0.02720claude-sonnet-5-5
Execute9.1s$0.03087claude-sonnet-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 propose-select --tasks support-easy --models claude-sonnet-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
23
failed tool calls
0
distinct tools
9

Final answer

I triaged T-1041 as sev3, due 2026-03-17T17:20:00Z, and assigned it to E-301 Yuki Sato. Its status is now open. I didn't change any other ticket.

  • Severity: The escalation matrix gives a VPN ticket with team impact (about nine Berlin sales users) sev3. How urgent the report sounds doesn't change that.
  • Deadline: The ticket had no deadline. I set it to the 09:20Z triage time plus the 480-minute sev3 response target. No existing deadline was moved.
  • Assignee: network-primary owns VPN. Yuki Sato is the engineer on call for that rotation at 17:20Z, when the deadline falls. Her shift runs 08:00–20:00Z.
  • No escalation: Sev3 has no escalation rotation in the matrix, so I didn't escalate. I also didn't raise the severity to get an escalation route.

Before changing anything I re-read the ticket, the clock and the matrix, and they matched the plan.

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.