RunSonnet 5.5repeat 1

Plan-execute on Return an expired, partially shipped order

claude-sonnet-5-5__plan-execute__ecommerce-hard__r1

Score

1.000

passed

design ran as designed

Cost: $0.063
Latency: 27.9s; setup 0.0s, grading 0.0s
Turns: 15
Tool calls: 12
Subagents: 0
Tokens in / out: 49k / 2.8k; 39,992 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

Spend$0.063

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

Phase	Duration	Cost	Turns	Tools	Model
Plan	9.1s	$0.014	2	0	claude-sonnet-5-5
Execute	18.8s	$0.049	13	12	claude-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

A gate that blocked the right moveGated-execute · Haiku 4.5
Three proposals beat one agentPropose-select · Haiku 4.5
A verifier that earned its keepPlan-execute-verify · Sonnet 5.5
A revision that did not helpPlan-execute-verify · Haiku 4.5
The control, missing a stepSingle · Haiku 4.5

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: 12
failed tool calls: 0
distinct tools: 9

Final answer

Order O-3001 is fully refunded (68,600 of 68,600 cents), but the two returned items are not back in stock yet. I have no tool to mark them received, so that part is waiting on the warehouse.

Cancelled line L3 (2 × USB-C Hub): it had never shipped, so I cancelled it. I refunded 13,800 cents to her card, which is what she paid for it, and put both units back into stock (8 → 10).
Returned lines L1 (P-DOC) and L2 (P-MON): both shipped on 2026-05-04, which is well past the 30-day return window. Policy says a late return must be paid as store credit, not to the card. I recorded a 54,800-cent store-credit refund against the order (21,900 for L1, 32,900 for L2). I also added the same 54,800 cents to her balance, which went from 500 to 55,300.
Warehouse: I did not restock P-DOC or P-MON. They go back into stock only when the warehouse receives them.
Scope: I didn't change the shipping address, and I didn't touch any other order, customer or product.

The plan assumed a return could be refunded to the card if it fell inside the window. This one fell outside it, so I followed the policy and paid it 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.