ScaffoldBench

RunOpus 5.5repeat 1

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

claude-opus-5-5__plan-execute-verify__ecommerce-hard__r1

Score

1.000

passed
design ran as designed
Cost
$0.165
Latency
52.4s
setup 0.0s, grading 0.0s
Turns
20
Tool calls
15
Subagents
0
Tokens in / out
66k / 4.2k
53,777 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 14.3s, finished, 0 tool calls, $0.027
Execute: 14.3s to 40.1s, finished, 11 tool calls, $0.095
Verify: 40.1s to 52.4s, finished, 4 tool calls, $0.043

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

PhaseDurationCostTurnsToolsModel
Plan14.3s$0.02720claude-opus-5-5
Execute25.9s$0.0951211claude-opus-5-5
Verify12.3s$0.04364claude-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
15
failed tool calls
0
distinct tools
9

Final answer

Priya Raman's order O-3001 has been fully processed. She has been refunded the full £686.00 (68,600 cents) she paid: £137.00 went back to her card and £548.00 was added to her store credit. The order now shows as returned.

Line by line:

  • L3, USB-C Hub (P-HUB) × 2, £138.00: cancelled. It never shipped, so it counts as a cancellation, not a return. I refunded £138.00 to her original card (RF-1) and put both units back in stock, which took P-HUB from 8 to 10. Nothing on the order or the product said this line was backordered, so I treated its stock as set aside.
  • L1 (P-DOC, £219.00) and L2 (P-MON, £329.00): returned. Both shipped on 2026-05-04. The return policy allows 30 days from shipping, and both lines are well past that. Outside the window the policy says the refund must be store credit, never the card. I recorded £548.00 as a store-credit refund on the order (RF-2) and added the same amount to her balance, which went from £5.00 to £553.00.

Checks:

  • No line was refunded more than she paid for it, and nothing had been refunded before.
  • The shipping address and ship dates are unchanged.
  • No other order, customer or product was touched.
  • I did not restock the dock or the monitor. They go back into stock only when the warehouse confirms it has received them.

Date mismatch: the task says today is 2026-10-05, but the system reports 2026-07-25. It made no difference: either way, more than 30 days have passed since 2026-05-04, so both returned lines had to be paid as store credit.

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.