ScaffoldBench

RunOpus 5.5repeat 2

Plan-execute on Return an expired, partially shipped order

claude-opus-5-5__plan-execute__ecommerce-hard__r2

Score

1.000

passed
design ran as designed
Cost
$0.121
Latency
40.3s
setup 0.0s, grading 0.0s
Turns
13
Tool calls
10
Subagents
0
Tokens in / out
50k / 3.3k
41,053 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 15.3s, finished, 0 tool calls, $0.032
Execute: 15.3s to 40.3s, finished, 10 tool calls, $0.090

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

PhaseDurationCostTurnsToolsModel
Plan15.3s$0.03220claude-opus-5-5
Execute25.0s$0.0901110claude-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
10
failed tool calls
0
distinct tools
8

Final answer

I've processed Priya Raman's (C-300) request for order O-3001: she has been refunded the full £686.00, but only £138.00 goes back to her card. The other £548.00 went to store credit, because the policy doesn't allow a card refund for these items.

Order and refunds

LineItemWhat happenedRefund
L32 × USB-C hub (P-HUB)It never shipped, so I cancelled it rather than treating it as a return.£138.00 to her card
L1Dock (P-DOC)It shipped on 2026-05-04, so I recorded it as a return.£219.00 as store credit
L2Monitor (P-MON)It shipped on 2026-05-04, so I recorded it as a return.£329.00 as store credit
  • Why store credit for the dock and monitor: the return window is 30 days from the date each item shipped. After that, the refund must be paid as store credit, not to the original payment method. These two items shipped more than 30 days ago. The system date is 2026-07-25, not 2026-10-06 as the plan said, but they are well outside the window either way.
  • Store-credit balance: I added the £548.00 to her account, so her balance went from £5.00 to £553.00.
  • Order record: the order is now marked as returned, with £686.00 refunded and no line refunded more than she paid for it. I didn't change the shipping address or any shipping records.

Warehouse

  • USB-C hub: stock was set aside for the cancelled line, so I put the 2 units back into stock (8 → 10). The order listed it as pending rather than backordered.
  • Dock and monitor: I haven't added these back to stock. They return to stock only when the warehouse actually receives them, so the warehouse needs to restock them when they arrive.

Nothing outside this order and customer was changed.

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.