ScaffoldBench

RunOpus 5.5repeat 2

Plan-execute-verify on Redirect the order that has not shipped

claude-opus-5-5__plan-execute-verify__ecommerce-easy__r2

Score

1.000

passed
design ran as designed
Cost
$0.121
Latency
30.4s
setup 0.0s, grading 0.0s
Turns
17
Tool calls
12
Subagents
0
Tokens in / out
49k / 2.2k
36,366 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 8.1s, finished, 0 tool calls, $0.016
Execute: 8.1s to 21.1s, finished, 7 tool calls, $0.055
Verify: 21.1s to 30.4s, finished, 5 tool calls, $0.050

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

PhaseDurationCostTurnsToolsModel
Plan8.1s$0.01620claude-opus-5-5
Execute12.9s$0.05587claude-opus-5-5
Verify9.3s$0.05075claude-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-easy --models claude-opus-5-5 --repeats 1

Score breakdown

  • passThe order that has not shipped carries the new address
    1.00weight 0.43

    O-1001 address: 7 Quarry Rise, Sheffield S11 8XZ, UK

  • passThe edit did not spill onto the order already in transit
    1.00weight 0.29
  • passLooked up which order was still open before editing one
    1.00weight 0.14
  • passChecked the state of the order already in transit
    1.00weight 0.14

Penalties

No penalties were applied.

Scorer metadata

tool calls
12
failed tool calls
0
distinct tools
5

Final answer

I updated the address on the order that hasn't shipped, and the order already in transit is unchanged.

  • O-1001 (not shipped yet): both items (L1 keyboard and L2 cables ×2) are still pending. Its shipping address is now 7 Quarry Rise, Sheffield S11 8XZ, UK; it was 12 Alder Lane, Bristol BS1 4TR, UK. I checked the order again after the change and nothing else on it changed.
  • O-1002 (in transit): the monitor shipped on 2026-07-07. I checked the order before and after the change: its address is still 88 Old Mill Road, Bristol BS3 2QQ, UK and its status is still shipped. Store policy says the address on a shipped order is never changed, because the parcel is already moving and the shipping record has to stay accurate.

I didn't make any other changes: no cancellations, refunds, stock changes or edits to her customer profile.

The in-transit parcel is going to 88 Old Mill Road, which is a different address from the one O-1001 had (12 Alder Lane). If Dana no longer lives at 88 Old Mill Road, she may need to contact the carrier to redirect the parcel or arrange to collect it. We can't change that from our side.

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.