ScaffoldBench

RunSonnet 5.5repeat 2

Propose-select on Cancel a fare the customer wrongly believes is refundable to their card

claude-sonnet-5-5__propose-select__airline-hard__r2

Score

1.000

passed
design ran as designed
Cost
$0.155
Latency
39.5s
setup 0.0s, grading 0.0s
Turns
31
Tool calls
25
Subagents
3
Tokens in / out
91k / 6.7k
65,309 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 15.1s, finished, 6 tool calls, $0.028
Proposal 2 (state-first): 0.0s to 14.9s, finished, 6 tool calls, $0.029
Proposal 3 (outcome-first): 0.0s to 15.6s, finished, 6 tool calls, $0.028
Select: 15.6s to 26.0s, finished, 0 tool calls, $0.031
Execute: 26.0s to 39.5s, finished, 7 tool calls, $0.038

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

PhaseDurationCostTurnsToolsModel
Proposal 1 (policy-first)15.1s$0.02876claude-sonnet-5-5
Proposal 2 (state-first)14.9s$0.02976claude-sonnet-5-5
Proposal 3 (outcome-first)15.6s$0.02876claude-sonnet-5-5
Select10.3s$0.03120claude-sonnet-5-5
Execute13.6s$0.03887claude-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 airline-hard --models claude-sonnet-5-5 --repeats 1

Score breakdown

  • passReservation is cancelled
    1.00weight 0.29
  • passSettled with exactly one ledger entry, in the right form and for the right amount
    1.00weight 0.57

    expected a single travel_credit entry of 24800 cents; ledger holds 1 entries

  • passThe cancelled seat went back into inventory
    1.00weight 0.14

Penalties

No penalties were applied.

Scorer metadata

tool calls
25
failed tool calls
0
distinct tools
8

Final answer

R3311 is cancelled. I closed it out as $248.00 of travel credit, not as a refund to Marcus's card.

  • Why credit and not the card: Basic Economy is non-refundable on its own. His trip insurance pays back to the card only if he cancels at least 14 days before departure. The refund policy for this reservation gives today as 2026-07-28, which is 8 days before the 2026-08-05 flight. Inside that window, the insurance converts the fare into travel credit instead.
  • No cancellation fee: The $50 fee is waived because Marcus is a platinum member. He gets the full $248.00.
  • Ledger: There is one entry, L1, for 24800 cents ($248.00) as travel credit. The ledger was empty before this. I touched no other reservation, passenger record or flight.
  • Date conflict: The session says today is 2026-10-06, which would put the flight in the past. The reservation's refund policy says 2026-07-28, and AA660 is still scheduled with seats on sale, so I used the policy date. That date decides credit versus card. If the real date were 2026-07-22 or earlier, the insurance would have paid to the card. Please confirm the date if you are unsure.

I can't put the money back on his card today. That isn't what he asked for.

Message for Marcus: "Your reservation R3311 is cancelled. Your trip insurance applies, but a refund to your card is only available when you cancel at least 14 days before departure. Your flight is 8 days away, so the insurance pays out as $248.00 of travel credit instead. As a platinum member you pay no cancellation fee."

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.