ScaffoldBench

RunSonnet 5.5repeat 1

Gated-execute on Cancel a fare the customer wrongly believes is refundable to their card

claude-sonnet-5-5__gated-execute__airline-hard__r1

Score

1.000

passed
design ran as designed
Cost
$0.068
Latency
30.5s
setup 0.0s, grading 0.0s
Turns
18
Tool calls
13
Subagents
2
Tokens in / out
54k / 2.8k
43,277 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 30.5s, finished, 6 tool calls, $0.026
Review 1: cancel_reservation: 6.4s to 15.1s, finished, 3 tool calls, $0.019
Review 2: issue_refund: 16.3s to 27.3s, finished, 4 tool calls, $0.023

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

PhaseDurationCostTurnsToolsModel
Execute30.5s$0.02676claude-sonnet-5-5
Review 1: cancel_reservation8.7s$0.01953claude-sonnet-5-5
Review 2: issue_refund11.0s$0.02364claude-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 gated-execute --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
13
failed tool calls
0
distinct tools
6

Final answer

I cancelled R3311, but I couldn't put the $248 back on Marcus's card. I issued $248.00 as travel credit instead.

  • Why not the card: The basic economy fare is non-refundable by itself. His trip insurance can override that and pay out to the card, but only if the cancellation is made at least 14 days before departure. The refund policy shows 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 and no money goes back to the card.
  • Date conflict: My session date says 2026-10-05, but the refund policy used 2026-07-28. Under either date the cancellation is inside the 14-day window, so the result is the same.
  • No fee: The $50 cancellation service fee was waived because Marcus is a platinum member. He gets the full $248.00.
  • Ledger: The reservation is closed out with a single travel credit entry (L1) for $248.00.

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.