ScaffoldBench

RunSonnet 5.5repeat 1

Propose-select on Add checked bags and collect the right fee

claude-sonnet-5-5__propose-select__airline-easy__r1

Score

1.000

passed
design ran as designed
Cost
$0.163
Latency
31.7s
setup 0.0s, grading 0.0s
Turns
28
Tool calls
22
Subagents
3
Tokens in / out
77k / 5.9k
46,500 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 12.3s, finished, 5 tool calls, $0.032
Proposal 2 (state-first): 0.0s to 13.3s, finished, 5 tool calls, $0.034
Proposal 3 (outcome-first): 0.0s to 13.2s, finished, 5 tool calls, $0.033
Select: 13.3s to 23.6s, finished, 0 tool calls, $0.032
Execute: 23.6s to 31.7s, finished, 7 tool calls, $0.031

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

PhaseDurationCostTurnsToolsModel
Proposal 1 (policy-first)12.3s$0.03265claude-sonnet-5-5
Proposal 2 (state-first)13.3s$0.03465claude-sonnet-5-5
Proposal 3 (outcome-first)13.2s$0.03365claude-sonnet-5-5
Select10.2s$0.03220claude-sonnet-5-5
Execute8.1s$0.03187claude-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-easy --models claude-sonnet-5-5 --repeats 1

Score breakdown

  • passReservation holds three checked bags and is otherwise untouched
    1.00weight 0.43

    checked_bags=3, status=confirmed

  • passExactly one baggage fee, for the bags beyond the free allowance
    1.00weight 0.57

    expected 4500 cents for 1 chargeable bag(s), charged 4500

Penalties

No penalties were applied.

Scorer metadata

tool calls
22
failed tool calls
0
distinct tools
7

Final answer

I added two checked bags to R1042, which now holds 3, the maximum. I charged one baggage fee of $45.00 (ledger entry L1).

Why $45.00: Rosa's economy fare includes 1 free bag and her silver status adds 1 more, so she has 2 free bags. Only the third bag is chargeable, and the first chargeable bag costs $45.00. She is not charged for both new bags.

Date discrepancy: AS420 is dated 2026-08-11, but today is 2026-10-04. The system still lists both the flight and the reservation as scheduled and confirmed. I went ahead on that data, since the handbook doesn't forbid it and you said she is flying. Someone may want to check the flight date.

I didn't change any other reservation, passenger record or flight.

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.