ScaffoldBench

RunOpus 5.5repeat 1

Propose-select on Return an expired, partially shipped order

claude-opus-5-5__propose-select__ecommerce-hard__r1

Score

1.000

passed
design ran as designed
Cost
$0.379
Latency
1m 11s
setup 0.0s, grading 0.0s
Turns
33
Tool calls
27
Subagents
3
Tokens in / out
89k / 11k
60,698 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 21.3s, finished, 6 tool calls, $0.061
Proposal 2 (state-first): 0.0s to 24.0s, finished, 6 tool calls, $0.064
Proposal 3 (outcome-first): 0.0s to 26.5s, finished, 6 tool calls, $0.065
Select: 26.5s to 51.4s, finished, 0 tool calls, $0.101
Execute: 51.4s to 1m 11s, finished, 9 tool calls, $0.088

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

PhaseDurationCostTurnsToolsModel
Proposal 1 (policy-first)21.3s$0.06176claude-opus-5-5
Proposal 2 (state-first)24.0s$0.06476claude-opus-5-5
Proposal 3 (outcome-first)26.5s$0.06576claude-opus-5-5
Select24.9s$0.10120claude-opus-5-5
Execute19.7s$0.088109claude-opus-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-opus-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
27
failed tool calls
0
distinct tools
9

Final answer

I've processed Priya's return of order O-3001, and she gets the full $686.00 back. However, $548.00 of it is store credit, not a card refund, because the return policy doesn't allow a card refund for those items.

Why it's split: The laptop dock and monitor shipped on 2026-05-04. That's well past the 30-day return window (the system's date is 2026-07-25 and the session's is 2026-10-05; the window is closed either way). The policy says late returns must be paid as store credit. The USB-C hubs never shipped, so they count as a cancellation, and the policy refunds those to her card regardless of how old the order is.

What I did (after checking the order, return policy, her account and hub stock first):

  1. Hubs (2 units): cancelled the line and refunded $138.00 to her card (refund RF-1). I put the 2 hubs back into stock, taking it from 8 to 10, because they never left the warehouse.
  2. Dock and monitor: recorded a $548.00 store-credit refund on the order (refund RF-2: $219.00 for the dock, $329.00 for the monitor). I then added the same $548.00 to her account, so her store credit went from $5.00 to $553.00.
  3. Order record: the full $686.00 is now refunded, nothing above what she paid for each item, and the order shows as returned.

Left alone on purpose: I didn't add the dock and monitor back to stock. Policy says they go back only when the warehouse actually receives them, so someone needs to add 1 of each then. I didn't change the shipping address or touch any other order, customer or product.

For your message to Priya: explain that $548.00 is store credit because the dock and monitor came back after the 30-day window. The $138.00 for the hubs goes back to her card because they never shipped.

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.