ScaffoldBench

RunOpus 5.5repeat 1

Plan-execute on Return an expired, partially shipped order

claude-opus-5-5__plan-execute__ecommerce-hard__r1

Score

1.000

passed
design ran as designed
Cost
$0.125
Latency
39.1s
setup 0.0s, grading 0.0s
Turns
14
Tool calls
11
Subagents
0
Tokens in / out
50k / 3.2k
41,295 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.
  • The plan was a plan: heldplan-execute.planThe planner’s reply was read through its schema and held at least one step.
  • Each call was shown the right tools: heldplan-execute.toolsThe planner was shown no tools and the executor the task’s full toolset.

Phases

Plan: 0.0s to 13.4s, finished, 0 tool calls, $0.029
Execute: 13.4s to 39.1s, finished, 11 tool calls, $0.095

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

PhaseDurationCostTurnsToolsModel
Plan13.4s$0.02920claude-opus-5-5
Execute25.7s$0.0951211claude-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 plan-execute --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
11
failed tool calls
0
distinct tools
8

Final answer

Priya's whole order O-3001 is processed: all 686.00 she paid has been refunded, 137.98 to her card and 548.00 as store credit, and the order is now marked returned.

LineItemPaidStateOutcome
L3USB-C Hub ×2138.00Never shippedCancelled and refunded to her card. The 2 hubs were set aside for her, so they went back into stock (8 → 10).
L1Laptop Dock ×1219.00Shipped 2026-05-04Return logged; refunded as store credit.
L227-inch Monitor ×1329.00Shipped 2026-05-04Return logged; refunded as store credit.

Why store credit for the dock and monitor: the return policy allows 30 days from the date a line shipped. Both shipped on 2026-05-04, which is well past 30 days, so the policy says they must be refunded as store credit, not to her card.

Store credit: the 548.00 is recorded against the order and added to her balance, which went from 5.00 to 553.00.

Warehouse: I didn't put the dock or monitor back into stock. The warehouse hasn't received them yet, and stock is only added when returned goods arrive. Their stock should go up by 1 each once they're checked in.

Other notes:

  • There's no separate tool for opening a return. Recording the refund is what marked L1 and L2 as returned on the order.
  • The shipping address wasn't changed, and nothing else was touched.
  • My instructions gave today's date as 2026-10-05, but the store system shows 2026-07-25. Either way the dock and monitor are outside 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.