ScaffoldBench

RunOpus 5.5repeat 2

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

claude-opus-5-5__plan-execute-verify__airline-hard__r2

Score

1.000

passed
design ran as designed
Cost
$0.146
Latency
46.2s
setup 0.0s, grading 0.0s
Turns
20
Tool calls
15
Subagents
0
Tokens in / out
64k / 3.5k
51,581 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 14.4s, finished, 0 tool calls, $0.027
Execute: 14.4s to 36.4s, finished, 9 tool calls, $0.076
Verify: 36.4s to 46.2s, finished, 6 tool calls, $0.043

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

PhaseDurationCostTurnsToolsModel
Plan14.4s$0.02720claude-opus-5-5
Execute22.0s$0.076109claude-opus-5-5
Verify9.8s$0.04386claude-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 airline-hard --models claude-opus-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
15
failed tool calls
0
distinct tools
8

Final answer

I cancelled reservation R3311 and returned the full $248.00 as travel credit, not to Marcus's card. The policy doesn't allow a card refund for this booking.

What I checked first

  • The booking is Marcus Bell's (P-1003): basic economy on AA660, San Francisco to Boston, 2026-08-05 at 06:45. He paid $248.00, and trip insurance is on the booking, as he said.
  • The flight is still scheduled and the booking had no earlier refunds or fees.

Why it's travel credit and not his card

  • A basic economy fare can't be refunded on its own, and the booking is from 2026-04-11, so the 24-hour full-refund rule doesn't apply.
  • Trip insurance only sends money back to the card when you cancel at least 14 days before departure. The refund policy gives today's date as 2026-07-28, which is 8 days before the flight. Inside that window, the insurance turns the fare into travel credit instead, and nothing goes back to the card.
  • The $50 cancellation fee is waived because Marcus is a platinum member, so he gets the full $248.00 as credit.

What I did

  1. Cancelled R3311, which released his seat on AA660.
  2. Recorded one ledger entry (L1): $248.00 returned as travel credit.
  3. Checked the booking again: it shows cancelled, with exactly that one entry.

What to tell Marcus: His booking is cancelled and he has $248.00 in travel credit. We couldn't put it back on his card because he cancelled less than 14 days before departure, and inside that window his insurance gives travel credit instead of a card refund.

One thing that didn't match: My setup said today is 2026-10-06, which would mean the flight date had already passed. But the airline's refund policy gives today as 2026-07-28, and the flight is still listed as scheduled, so I went with the airline's date. Under either date he would not have qualified for a card refund.

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.