ScaffoldBench

RunSonnet 5.5repeat 2

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

claude-sonnet-5-5__propose-select__airline-easy__r2

Score

1.000

passed
design ran as designed
Cost
$0.156
Latency
30.6s
setup 0.0s, grading 0.0s
Turns
27
Tool calls
21
Subagents
3
Tokens in / out
75k / 5.7k
46,201 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 13.6s, finished, 5 tool calls, $0.034
Proposal 2 (state-first): 0.0s to 13.4s, finished, 5 tool calls, $0.034
Proposal 3 (outcome-first): 0.0s to 13.7s, finished, 5 tool calls, $0.033
Select: 13.7s to 21.5s, finished, 0 tool calls, $0.026
Execute: 21.5s to 30.6s, finished, 6 tool calls, $0.029

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

PhaseDurationCostTurnsToolsModel
Proposal 1 (policy-first)13.6s$0.03465claude-sonnet-5-5
Proposal 2 (state-first)13.4s$0.03465claude-sonnet-5-5
Proposal 3 (outcome-first)13.7s$0.03365claude-sonnet-5-5
Select7.7s$0.02620claude-sonnet-5-5
Execute9.1s$0.02976claude-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
21
failed tool calls
0
distinct tools
7

Final answer

I added two checked bags to R1042, so Rosa Mendel now has 3, and charged her $45.00 for them. The charge is a single baggage_fee entry on the ledger (L1).

  • Why $45.00: She flies economy, which includes 1 free bag, and her silver status adds 1 more. That makes 2 free bags, so only the third bag is charged. It is the first chargeable bag, priced at $45.00. The $75.00 rate for further bags didn't apply.
  • Bag limit: 3 bags is the most a reservation can hold, so this is the maximum.
  • Date mismatch: AS420 is dated 2026-08-11, which is before today (2026-10-06). The system still shows the flight as scheduled and the reservation as confirmed, and the bag update went through without error. You may want to check the booking 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.