ScaffoldBench

RunSonnet 5.5repeat 2

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

claude-sonnet-5-5__gated-execute__airline-hard__r2

Score

1.000

passed
design ran as designed
Cost
$0.065
Latency
31.4s
setup 0.0s, grading 0.0s
Turns
18
Tool calls
13
Subagents
2
Tokens in / out
54k / 2.5k
43,220 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 31.4s, finished, 6 tool calls, $0.027
Review 1: cancel_reservation: 6.3s to 14.6s, finished, 3 tool calls, $0.018
Review 2: issue_refund: 16.1s to 27.4s, finished, 4 tool calls, $0.020

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

PhaseDurationCostTurnsToolsModel
Execute31.4s$0.02776claude-sonnet-5-5
Review 1: cancel_reservation8.3s$0.01853claude-sonnet-5-5
Review 2: issue_refund11.3s$0.02064claude-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 Marcus is getting $248.00 in travel credit, not the $248 back on his card.

  • Why not the card: His fare is basic economy, which is non-refundable on its own. Trip insurance only pays back to the card if the cancellation is at least 14 days before departure. The refund policy tool puts today at 2026-07-28, which is 8 days before the 2026-08-05 flight. Inside that window, the insurance converts the fare paid into travel credit.
  • Service fee: The $50 cancellation fee doesn't apply because Marcus is a platinum member.
  • What I did: I cancelled the reservation and issued a single travel-credit refund of $248.00 (ledger entry L1). That closes it out financially.
  • Date discrepancy: My session context gives today's date as 2026-10-06, but the refund policy tool reports 2026-07-28. I used the policy tool's date, since the flight still showed as scheduled. On the 10-06 date the outcome would be different.

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.