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
What change most likely caused the incident on 2026-07-14, and what resolved it? Use the workspace files.
bare Bare model loop — no harness vs flagOn PersonalAssistant with the one-loop harness-driven proposerbare — controlflagOn — candidateThe incident on 2026-07-14 (API error rate spiking to ~30% and p99 latency to 8s starting around 09:12 UTC) was most likely caused by the **v3.2.1 deploy at 09:05 UTC**, which switched the session cache from in-memory to Redis. The timing lines up: errors began ~7 minutes after that deploy. It was resolved by the **v3.2.2 rollback deployed at 10:02 UTC**, which reverted the session cache back to in-memory. Error rate returned to normal by 10:07 UTC, ~5 minutes after the rollback.
**Most likely cause:** The v3.2.1 deploy at 09:05 UTC on 2026-07-14, which switched the session cache from in-memory to Redis. The API error rate spiked to 30% with 8s p99 latency at 09:12 UTC, ~7 minutes after that deploy. **What resolved it:** The v3.2.2 rollback deployed at 10:02 UTC, which reverted the session cache back to in-memory. Error rate returned to normal by 10:07 UTC.
no tool calls
no tool calls
| Check | Verdict |
|---|---|
| contains "v3.2.1" | pass |
| contains "Redis" | pass |
| not contains "v3.2.0 caused" | pass |
| not contains "caused by the dependency bumps" | pass |
| not contains "caused by v3.2.0" | pass |
| regex /roll ?back|revert|v3\.2\.2/i | pass |
success yes · hallucination no · unauthorized effect no · recovered n/a
| Check | Verdict |
|---|---|
| contains "v3.2.1" | pass |
| contains "Redis" | pass |
| not contains "v3.2.0 caused" | pass |
| not contains "caused by the dependency bumps" | pass |
| not contains "caused by v3.2.0" | pass |
| regex /roll ?back|revert|v3\.2\.2/i | pass |
success yes · hallucination no · unauthorized effect no · recovered n/a
| latency | 7597 ms |
| cost | $0.0113 |
| tokens | 456 |
| supervisor consults | — |
| latency | 13728 ms |
| cost | $0.0186 |
| tokens | 820 |
| supervisor consults | 0 |
Other seeds — seed 2: pass · $0.0127 · 8.7 s seed 3: fail · — · 1.6 s
Other seeds — seed 2: pass · $0.0471 · 42.8 s seed 3: pass · $0.0198 · 15.6 s
What change most likely caused the incident on 2026-07-14, and what resolved it? Use the workspace files.
The incident on 2026-07-14 (API error rate spiking to ~30% and p99 latency to 8s starting around 09:12 UTC) was most likely caused by the **v3.2.1 deploy at 09:05 UTC**, which switched the session cache from in-memory to Redis. The timing lines up: errors began ~7 minutes after that deploy. It was resolved by the **v3.2.2 rollback deployed at 10:02 UTC**, which reverted the session cache back to in-memory. Error rate returned to normal by 10:07 UTC, ~5 minutes after the rollback.
What change most likely caused the incident on 2026-07-14, and what resolved it? Use the workspace files.
**Most likely cause:** The v3.2.1 deploy at 09:05 UTC on 2026-07-14, which switched the session cache from in-memory to Redis. The API error rate spiked to 30% with 8s p99 latency at 09:12 UTC, ~7 minutes after that deploy. **What resolved it:** The v3.2.2 rollback deployed at 10:02 UTC, which reverted the session cache back to in-memory. Error rate returned to normal by 10:07 UTC.
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.
| Layer | Acted? | Why |
|---|---|---|
| world_model | acted | Remembered: What change most likely caused the incident on 2026-07-14, and what resolved it? Use the workspace files. |
| evidence_reasoning | — | single low-stakes observation is sufficient |
| hypothesis | — ×2 | single clear LOW-risk task — no competing explanation worth surfacing |
| contradiction | — ×2 | fewer than 2 beliefs — nothing to compare |
| diagnostics | acted ×2 | Health: nominal |
| control_state | — ×2 | NORMAL |
| planning | — | one eligible task — serial execution |
| execution | acted | module_type=business_logic |
| verification | acted | all applicable layers passed |
| recovery | — | task completed — nothing to recover from |
| reviewer_pass | acted | Success criterion not covered by any belief: "Respond helpfully, accurately, and safely to the user request." |
| Tool | Decision | Why |
|---|---|---|
list_directory | ALLOW | harness control state permits (execution_mode=NORMAL) |
read_file | ALLOW | harness control state permits (execution_mode=NORMAL) |
read_file | ALLOW | harness control state permits (execution_mode=NORMAL) |
read_file | ALLOW | harness control state permits (execution_mode=NORMAL) |
action_gate (1) → update_task_state (1) → output_validation (2)