Experiment: Network Partition Mid-Batch

Date: 2026-06-24 Phase: 24 — Climate Resilience Verification

1. Hypothesis

If I disconnect the ward gateway from the central Docker network while it accepts observations, I expect events to buffer locally and fleet status to show DEGRADED, because sync upload cannot reach central until the partition heals.

2. Baseline

Encounter: 0f81a139-9f33-47ad-9df9-09c7a6c011c8
Gateway status: ONLINE
Gateway buffer depth: 0
Central observation count: 14

3. Break

GATEWAY_CONTAINER=$(docker ps -qf name=ward-gateway-api)
NETWORK=$(docker network ls --format '{{.Name}}' | grep vigilcare | head -1)
docker network disconnect "$NETWORK" "$GATEWAY_CONTAINER"

curl -X POST "http://localhost:5081/api/v1/encounters/$ENCOUNTER_ID/observations" \
  -H "Authorization: Bearer $GATEWAY_JWT" \
  -H "Content-Type: application/json" \
  -d '{"observationCode":"HEART_RATE","value":165,"unit":"bpm","source":"DEVICE",
       "recordedAt":"<UTC-now>","idempotencyKey":"partition-exp2-1782245574"}'

4. Observe

Gateway accepted observation locally (HTTP 201)
Fleet status transitioned to DEGRADED (reportedBufferDepth: 2)
Gateway DB unsynced buffer count: 2
Central could not receive the observation during partition
minutesSinceHeartbeat remained near zero (gateway process still running)

5. Fix / Outcome

Bug found? no
Fix applied: no fix needed — by design

6. Verify

(Post-heal results in 2026-06-24-partition-mid-batch-fixed.json)

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