ScaffoldBench

RunSonnet 5.5repeat 2

Plan-execute on Return an expired, partially shipped order

claude-sonnet-5-5__plan-execute__ecommerce-hard__r2

Score

1.000

passed
design ran as designed
Cost
$0.062
Latency
30.2s
setup 0.0s, grading 0.0s
Turns
14
Tool calls
11
Subagents
0
Tokens in / out
42k / 3.0k
33,068 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 9.2s, finished, 0 tool calls, $0.013
Execute: 9.2s to 30.2s, finished, 11 tool calls, $0.049

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

PhaseDurationCostTurnsToolsModel
Plan9.2s$0.01320claude-sonnet-5-5
Execute21.0s$0.0491211claude-sonnet-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-sonnet-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
9

Final answer

O-3001 is fully refunded and closed out: £686.00 back to Priya in total, split between card and store credit. The returned dock and monitor are not back in stock yet.

  • Cancelled line:

    • L3 (2 × USB-C Hub) had never shipped, so I cancelled it as a cancellation, not a return.
    • I refunded £138.00 to the original card, which is what she paid for it.
    • I put both hubs back into stock (P-HUB went from 8 to 10).
    • The order doesn't show whether stock was set aside for L3. It was "pending" rather than backordered, so I treated it as having stock set aside.

  • Returned lines:

    • L1 (Laptop Dock, £219.00) and L2 (Monitor, £329.00) shipped on 2026-05-04. That is far beyond the 30-day window, which runs from the ship date.
    • The policy therefore requires store credit, not the card. I recorded a £548.00 store-credit refund against the order and added the same amount to her balance. Her balance went from £5.00 to £553.00.
    • Each line was refunded exactly what she paid.
  • Warehouse: I did not restock L1 or L2. There is no receive-return tool and nothing shows the goods have arrived. The dock (P-DOC) and monitor (P-MON) should be added to stock once the warehouse receives them.

I didn't re-read the order afterwards. The tool outputs confirmed the order is now "returned" with £686.00 refunded against £686.00 paid. I didn't touch the shipping address or any other order, customer or product.

The plan said to open a return through a return or RMA tool, but none exists here. The refund calls marked L1 and L2 as returned instead.

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.