ScaffoldBench

RunSonnet 5.5repeat 1

Propose-select on Cancel one line of a multi-line order

claude-sonnet-5-5__propose-select__ecommerce-medium__r1

Score

1.000

passed
design ran as designed
Cost
$0.137
Latency
33.6s
setup 0.0s, grading 0.0s
Turns
29
Tool calls
23
Subagents
3
Tokens in / out
76k / 6.0k
52,983 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 11.4s, finished, 4 tool calls, $0.022
Proposal 2 (state-first): 0.0s to 11.9s, finished, 6 tool calls, $0.025
Proposal 3 (outcome-first): 0.0s to 11.9s, finished, 6 tool calls, $0.025
Select: 11.9s to 21.8s, finished, 0 tool calls, $0.027
Execute: 21.8s to 33.6s, finished, 7 tool calls, $0.037

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

PhaseDurationCostTurnsToolsModel
Proposal 1 (policy-first)11.4s$0.02254claude-sonnet-5-5
Proposal 2 (state-first)11.9s$0.02576claude-sonnet-5-5
Proposal 3 (outcome-first)11.9s$0.02576claude-sonnet-5-5
Select9.9s$0.02720claude-sonnet-5-5
Execute11.9s$0.03787claude-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 ecommerce-medium --models claude-sonnet-5-5 --repeats 1

Score breakdown

  • passThe mouse line is cancelled and refunded to the card for exactly what was paid
    1.00weight 0.38

    line L1: status=cancelled refundedCents=7350 method=card

  • passExactly the cancelled quantity went back into stock
    1.00weight 0.25

    P-MOU stock=32

  • passThe other lines of the order are still on their way
    1.00weight 0.25
  • passRead the order before changing it
    1.00weight 0.13

Penalties

No penalties were applied.

Scorer metadata

tool calls
23
failed tool calls
0
distinct tools
8

Final answer

I cancelled the wireless mouse line (L1) on O-2003, refunded it to Marcus's card, and put the two mice back in stock.

  • Cancel: L1 (P-MOU, qty 2) had not shipped, so this was a cancellation rather than a return. The cancel call on its own issued no refund and moved no stock.
  • Refund: I refunded 7,350 cents to the card (refund RF-1). That is what he actually paid for L1 after discount code MOUSE25. The list price would have been 9,800, which is more than he paid. There is no store credit, because the policy sends refunds for lines that never shipped back to the original payment method.
  • Restock: P-MOU stock went from 30 to 32, since stock had been set aside for the line.
  • Untouched: L2 (hub) and L3 (cables) are still pending, so they ship as planned. The shipping address is unchanged, and I didn't touch any other orders or products.

I re-read O-2003 afterwards and it shows 7,350 refunded, L1 cancelled and L2 and L3 still pending. I didn't re-check the customer's store-credit balance, but I made no store-credit calls.

The current date is 2026-07-25 in the system, not the 2026-10-05 in my instructions. That doesn't change anything here, because the policy applies to a line that never shipped whatever the order's age.

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.