ScaffoldBench

RunOpus 5.5repeat 2

Plan-execute-verify on Return an expired, partially shipped order

claude-opus-5-5__plan-execute-verify__ecommerce-hard__r2

Score

1.000

passed
design ran as designed
Cost
$0.148
Latency
54.7s
setup 0.0s, grading 0.0s
Turns
19
Tool calls
14
Subagents
0
Tokens in / out
59k / 3.6k
46,533 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-verify.planThe planner’s reply was read through its schema and held at least one step.
  • Every verdict was read: heldplan-execute-verify.verdictsEvery review round ended with a verdict read from the schema reply, not a default.
  • The loop did what its verdicts said: heldplan-execute-verify.loopEvery verdict that called for a revision got one, and nothing was revised without such a verdict.
  • Each call was shown the right tools: heldplan-execute-verify.toolsThe planner was shown no tools, the verifier the read-only ones, and the executor and reviser the full toolset.

Phases

Plan: 0.0s to 13.3s, finished, 0 tool calls, $0.026
Execute: 13.3s to 47.7s, finished, 10 tool calls, $0.088
Verify: 47.7s to 54.7s, finished, 4 tool calls, $0.034

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

PhaseDurationCostTurnsToolsModel
Plan13.3s$0.02620claude-opus-5-5
Execute34.4s$0.0881110claude-opus-5-5
Verify7.0s$0.03464claude-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-verify --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
14
failed tool calls
0
distinct tools
8

Final answer

I've processed all of Priya Raman's order O-3001 (customer C-300). She's been refunded the full £686.00 she paid: £138.00 to her card and £548.00 as store credit, because the two items that shipped are outside the 30-day return window.

LineItemWhat I didRefund
L3P-HUB USB-C Hub ×2Hadn't shipped, so I cancelled it rather than treating it as a return. I put both units back in stock (8 → 10).£138.00 to her card (RF-1)
L1P-DOC ×1Shipped 2026-05-04, recorded as a return£219.00 store credit
L2P-MON ×1Shipped 2026-05-04, recorded as a return£329.00 store credit
  • Why store credit for L1 and L2: the return policy measures its 30-day window from the date each item shipped. After that, returns can only be paid as store credit, not back to the card. Both items shipped 2026-05-04, well over 30 days ago.
  • Dates: the order system gives today as 2026-07-25, not the 2026-10-06 I was given. It doesn't change the outcome, since either date puts the items outside the window.
  • Store credit: £548.00 is recorded against the order (RF-2) and added to her account, so her balance went from £5.00 to £553.00.
  • Warehouse: the docking station (L1) and monitor (L2) have not been put back in stock. That should only happen once the warehouse actually receives them.
  • Order record: O-3001 now shows as returned, with £686.00 of £686.00 refunded and no line refunded more than she paid for it. I didn't change the shipping address or any other order.

One assumption: L3 was marked "pending", not "backordered", so I treated its stock as set aside for her and restocked it.

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.