ScaffoldBench

RunSonnet 5.5repeat 2

Plan-execute-verify on Work a cancellation queue where cash cannot be recalled

claude-sonnet-5-5__plan-execute-verify__airline-cancellation-queue__r2

Score

1.000

passed
design ran as designed
Cost
$0.350
Latency
1m 45s
setup 0.0s, grading 0.0s
Turns
132
Tool calls
124
Subagents
0
Tokens in / out
315k / 13k
269,073 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 9.3s, finished, 0 tool calls, $0.013
Execute: 9.3s to 57.4s, finished, 73 tool calls, $0.179
Verify: 57.4s to 1m 8s, finished, 12 tool calls, $0.040
Revise (round 1): 1m 8s to 1m 32s, finished, 20 tool calls, $0.066
Verify revision 1: 1m 32s to 1m 45s, finished, 19 tool calls, $0.052

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

PhaseDurationCostTurnsToolsModel
Plan9.3s$0.01320claude-sonnet-5-5
Execute48.1s$0.1797473claude-sonnet-5-5
Verify10.6s$0.0401412claude-sonnet-5-5
Revise (round 1)24.4s$0.0662120claude-sonnet-5-5
Verify revision 112.4s$0.0522119claude-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 plan-execute-verify --tasks airline-cancellation-queue --models claude-sonnet-5-5 --repeats 1

Score breakdown

  • passR7101 cancelled
    1.00weight 0.03
  • passR7101 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected refund/original_payment 27000; ledger got refund/original_payment 27000

  • passQ-401 resolved with a note to the customer
    1.00weight 0.01
  • passR7102 cancelled
    1.00weight 0.03
  • passR7102 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected refund/original_payment 21000; ledger got refund/original_payment 21000

  • passQ-402 resolved with a note to the customer
    1.00weight 0.01
  • passR7103 cancelled
    1.00weight 0.03
  • passR7103 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected refund/travel_credit 26000; ledger got refund/travel_credit 26000

  • passQ-403 resolved with a note to the customer
    1.00weight 0.01
  • passR7104 cancelled
    1.00weight 0.03
  • passR7104 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected refund/original_payment 20000; ledger got refund/original_payment 20000

  • passQ-404 resolved with a note to the customer
    1.00weight 0.01
  • passR7105 cancelled
    1.00weight 0.03
  • passR7105 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected non_refundable; ledger got non_refundable 0

  • passQ-405 resolved with a note to the customer
    1.00weight 0.01
  • passR7106 cancelled
    1.00weight 0.03
  • passR7106 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected refund/travel_credit 19800; ledger got refund/travel_credit 19800

  • passQ-406 resolved with a note to the customer
    1.00weight 0.01
  • passR7108 cancelled
    1.00weight 0.03
  • passR7108 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected refund/original_payment 12000; ledger got refund/original_payment 12000

  • passQ-408 resolved with a note to the customer
    1.00weight 0.01
  • passR7110 cancelled
    1.00weight 0.03
  • passR7110 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected refund/travel_credit 32000; ledger got refund/travel_credit 32000

  • passQ-409 resolved with a note to the customer
    1.00weight 0.01
  • passR7111 cancelled
    1.00weight 0.03
  • passR7111 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected refund/original_payment 30000; ledger got refund/original_payment 30000

  • passQ-410 resolved with a note to the customer
    1.00weight 0.01
  • passR7112 cancelled
    1.00weight 0.03
  • passR7112 closed out with exactly one entry of the right kind, method and amount
    1.00weight 0.06

    expected refund/original_payment 24000; ledger got refund/original_payment 24000

  • passQ-412 resolved with a note to the customer
    1.00weight 0.01

Penalties

No penalties were applied.

Scorer metadata

tool calls
124
failed tool calls
0
distinct tools
16

Final answer

I worked the two cancellation requests that were still open, Q-410 and Q-412. The verifier was right that I had missed them.

RequestReservationResultWhy
Q-410R7111 (Wren Ashby)$300.00 refunded to the Amex ending 6402Economy fare, refundable to the card. Wren is Platinum, so the $50.00 fee is waived.
Q-412R7112 (Zoe Clark)$240.00 refunded to the Visa ending 3358Economy fare of $290.00 minus the $50.00 fee, which applies to Silver.

Both reservations are cancelled, each has one refund entry on its ledger (L10 and L11), and both requests are resolved with a note to the customer. Both cards were active, and neither reservation had earlier ledger entries. No bulletins are published.

I used the refund policy tool's date of 2026-07-28 rather than the 2026-10-06 date in this session's instructions. The requests were received on 2026-07-28 and the flights are in August, so I kept the same date I used for the first eight requests.

I left Q-407 (R7107) alone because it is a flight change, not a cancellation. I didn't re-check the other eight requests, since the verifier found no problem with them.

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.