ScaffoldBench

RunSonnet 5.5repeat 2

Propose-select on Return an expired, partially shipped order

claude-sonnet-5-5__propose-select__ecommerce-hard__r2

Score

1.000

passed
design ran as designed
Cost
$0.174
Latency
50.5s
setup 0.0s, grading 0.0s
Turns
34
Tool calls
28
Subagents
3
Tokens in / out
75k / 8.7k
48,234 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 16.1s, finished, 6 tool calls, $0.031
Proposal 2 (state-first): 0.0s to 16.5s, finished, 6 tool calls, $0.030
Proposal 3 (outcome-first): 0.0s to 22.9s, finished, 6 tool calls, $0.030
Select: 22.9s to 35.3s, finished, 0 tool calls, $0.034
Execute: 35.3s to 50.5s, finished, 10 tool calls, $0.049

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

PhaseDurationCostTurnsToolsModel
Proposal 1 (policy-first)16.1s$0.03176claude-sonnet-5-5
Proposal 2 (state-first)16.5s$0.03076claude-sonnet-5-5
Proposal 3 (outcome-first)22.9s$0.03076claude-sonnet-5-5
Select12.4s$0.03420claude-sonnet-5-5
Execute15.2s$0.0491110claude-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-hard --models claude-sonnet-5-5 --repeats 1

Score breakdown

  • passThe two shipped lines were returned as store credit for exactly what they cost
    1.00weight 0.27
  • passThe credit reached the customer balance, not just the ledger
    1.00weight 0.18

    storeCreditCents=55300

  • passThe line that never shipped was cancelled and refunded to the card
    1.00weight 0.27

    line L3: status=cancelled refundedCents=13800 method=card

  • passCancelled units were restocked and returned units were not
    1.00weight 0.18

    P-HUB=10 P-DOC=3 P-MON=5

  • passRead the return policy before issuing a refund
    1.00weight 0.09

Penalties

No penalties were applied.

Scorer metadata

tool calls
28
failed tool calls
0
distinct tools
9

Final answer

Order O-3001 is processed, but only part of the money goes back to Priya's card. I split it rather than refunding the whole order to the card, because the return policy doesn't allow that.

  • Hubs (L3, 2 × P-HUB): these never shipped, so I cancelled the line and refunded the 13,800¢ she paid to her card. I put both hubs back in stock, taking P-HUB from 8 to 10. The line was pending rather than backordered, so I treated stock as set aside for it. The inventory log doesn't show a reservation, so that is an assumption.

  • Dock and monitor (L1 and L2): both shipped on 2026-05-04, well past the 30-day return window. The policy says they must be paid out as store credit, never to the card.

    • I recorded 21,900¢ for L1 and 32,900¢ for L2 against the order as store credit.
    • I added the same 54,800¢ to her balance, which went from 500¢ to 55,300¢.
    • Both lines now show as returned, and the order status is "returned".
  • Total refunded: 68,600¢ (13,800¢ to the card and 54,800¢ as store credit), which equals what she paid.
  • Stock for the returned goods: I did not restock P-DOC or P-MON. Returned goods only go back on the shelf once the warehouse receives them, so that step is still open.
  • Left alone: I changed nothing else, including the shipping address.

The tools gave today's date as 2026-07-25, while the session header says 2026-10-06. Both dates put the shipped lines outside the window, so the result is the same.

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.