The 11-layer harness vs. a bare model loop

Compare: research-synthesize-owners

Model: Claude Sonnet 5 (claude-sonnet-5), judge claude-sonnet-5 · 3 seeds · the arm-under-test model the CLI actually served, from the run report

Prompt

Which team owns the billing service, and who is that team's manager? Use the files in the workspace.
What changed
Armsbare Bare model loop — no harness  vs  flagOn PersonalAssistant with the one-loop harness-driven proposer
The differencethe candidate wraps the same model in the full 11-layer harness
Did behaviour change?
Final replydiffers
Tool callssame 0 calls
Supervisor consults0 / 0
Harness layersdiffer — candidate also: diagnostics, execution, hypothesis, reviewer_pass, verification, world_model
Graded outcomeboth pass
Impact
This taskThe candidate behaved differently but the graded outcome was the same.
Shown seedcost +181% · latency +244% · tokens +275% (candidate vs control, seed 1)

Side by side — control (left) vs candidate (right), seed 1

bare — control
flagOn — candidate
Final reply
The billing service is owned by the **payments-core** team, and that team's manager is **Sam Okafor**.
The billing service is owned by the **payments-core** team, whose manager is **Sam Okafor**.
Tool calls

no tool calls

no tool calls

Grader checks
CheckVerdict
contains "payments-core"pass
contains "Sam Okafor"pass
not contains "Priya Raman"pass
not contains "Lena Vogt"pass

success yes  ·  hallucination no  ·  unauthorized effect no  ·  recovered n/a

CheckVerdict
contains "payments-core"pass
contains "Sam Okafor"pass
not contains "Priya Raman"pass
not contains "Lena Vogt"pass

success yes  ·  hallucination no  ·  unauthorized effect no  ·  recovered n/a

Metrics
latency5794 ms
cost$0.0090
tokens283
supervisor consults
latency19958 ms
cost$0.0254
tokens1062
supervisor consults0

Other seeds — seed 2: pass · $0.0092 · 5.8 s   seed 3: fail · — · 1.7 s

Other seeds — seed 2: pass · $0.0247 · 18.3 s   seed 3: pass · $0.0254 · 19.4 s

Read the full turn

Conversation — bare (control) · seed 1
user
Which team owns the billing service, and who is that team's manager? Use the files in the workspace.
final reply
The billing service is owned by the **payments-core** team, and that team's manager is **Sam Okafor**.
Conversation — flagOn (candidate) · seed 1
user
Which team owns the billing service, and who is that team's manager? Use the files in the workspace.
risk LOWproposer flat-oneloopnon-trivialmode TOOL
model
The billing service is owned by the **payments-core** team (6 engineers, based in Berlin), and that team's manager is **Sam Okafor**.
final reply
The billing service is owned by the **payments-core** team, whose manager is **Sam Okafor**.

Harness trace

Full harness trace — flagOn · seed 1

The harness runs on every turn. Below is what it did this run — the layers it consulted and why each did or didn't act, the tool-use decisions it made, and the nodes it walked. Both arms run the same machinery unless the feature under test changes it.

risk LOWproposer flat-oneloopmode TOOLplan none

Harness layers

LayerActed?Why
world_modelacted ×2Remembered: Which team owns the billing service, and who is that team's manager? Use the files in the workspace.
evidence_reasoning×2single low-stakes observation is sufficient
hypothesisactedConsidered 4 ways this request could be understood; going with the most direct one
hypothesisacted ×2Considered 6 ways this request could be understood; going with the most direct one
contradiction×2fewer than 2 beliefs — nothing to compare
contradictionchecked — no conflicts found
diagnosticsacted ×3Health: nominal
control_state×3NORMAL
planning×2one eligible task — serial execution
executionacted ×2module_type=business_logic
verificationacted ×2all applicable layers passed
recovery×2task completed — nothing to recover from
reviewer_passactedSuccess criterion not covered by any belief: "Respond helpfully, accurately, and safely to the user request."

Tool-policy decisions

ToolDecisionWhy
list_directoryALLOWharness control state permits (execution_mode=NORMAL)
read_fileALLOWharness control state permits (execution_mode=NORMAL)
read_fileALLOWharness control state permits (execution_mode=NORMAL)
read_fileALLOWharness control state permits (execution_mode=NORMAL)
list_directoryALLOWharness control state permits (execution_mode=NORMAL)
read_fileALLOWharness control state permits (execution_mode=NORMAL)
read_fileALLOWharness control state permits (execution_mode=NORMAL)
read_fileALLOWharness control state permits (execution_mode=NORMAL)

Node path

action_gate (1) update_task_state (1) action_gate (2) update_task_state (2) output_validation (3)

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