ScaffoldBench

RunOpus 5.5repeat 1

Single on Return an expired, partially shipped order

claude-opus-5-5__single__ecommerce-hard__r1

Score

1.000

passed
design ran as designed
Cost
$0.071
Latency
22.0s
setup 0.0s, grading 0.0s
Turns
10
Tool calls
9
Subagents
0
Tokens in / out
32k / 1.8k
27,509 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.
  • Each call was shown the right tools: heldsingle.toolsThe agent was shown exactly the task’s tools, none missing and none extra.

Phases

Main: 0.0s to 22.0s, finished, 9 tool calls, $0.071

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

PhaseDurationCostTurnsToolsModel
Main22.0s$0.071109claude-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 single --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
9
failed tool calls
0
distinct tools
8

Final answer

Order O-3001 for Priya Raman is fully processed. She gets back the full £686.00 she paid, but £548.00 of it comes as store credit, not to her card, because the return window had closed.

The money

  • USB-C hubs (L3, 2 units, £138.00): these had never shipped, so this was a cancellation, not a return. The full £138.00 went back to her card (refund RF-1), as the policy requires for cancellations.
  • Docking station (L1, £219.00) and monitor (L2, £329.00): these shipped on 2026-05-04. The return policy allows 30 days from the ship date, so the window closed long ago. Under the policy, late returns are paid only as store credit, never to the card, even though she asked for her money back. I recorded the £548.00 refund against the order (refund RF-2) and added the same amount to her balance, which went from £5.00 to £553.00.

The order record: the hub line is marked cancelled, the other two lines are marked returned, and the order status is now "returned."

The warehouse: I put the 2 hubs straight back into stock (8 → 10), since they never left the warehouse. I did not restock the docking station or monitor. Under the policy, returned goods go back on the shelf only once the warehouse receives them, so someone needs to restock them when her parcel arrives.

The system tools give today's date as 2026-07-25, while my session gives 2026-10-05. Under either date the two shipped items are well past the 30-day window, so the outcome 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.