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DEMO DATA — replayed from cassette c11, recorded against a real k3s cluster. Investigated by gpt-oss:120b on 2026-09-01 against a tool trace from gemini-3.7-flash, and graded Correct against the answer key. Timestamps are the original recording times.

← all ten investigations

CrashLoopBackOff on c11-transient (hephaisto-chaos)

! Escalated Critical CrashLoopBackOff cassette c11
target
hephaisto-chaos/Pod/c11-transient-6f59fc7fcc-27h6g
workload
hephaisto-chaos/Deployment/c11-transient
node
opened
2026-08-30 21:07:43
investigated
1m 28s

expected root cause — the answer key

The container aborts at startup because it finds a stale generation counter on its persistent volume at /data/generation - the value is 1 and it requires 2 - so it exits 1 and the Deployment enters CrashLoopBackOff. The decisive evidence is a FATAL log line naming that generation.

This is never shown to the model. It is what the grader compared the diagnosis against, and it is on this page because a demo that showed only the answer would be asking you to take the grading on trust.

signals 20

reasonmessagefirst seenn
RestartStorm 5 restarts observed in the trend window (total 5) 2026-08-30 21:07:34 1
BackOff Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(21af0a9a-f38f-435b-988f-431896827f61) 2026-08-30 21:07:43 1
ReadinessFlapping pod readiness changed 4 times in the trend window without restarting 2026-08-30 21:07:34 1
CrashLoopBackOff container app: CrashLoopBackOff. last exit code 1 (Error), restartCount 1 2026-08-30 21:07:34 1
ReadinessFlapping pod readiness changed 5 times in the trend window without restarting 2026-08-30 21:07:34 1
BackOff Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(21af0a9a-f38f-435b-988f-431896827f61) 2026-08-30 21:07:43 2
CrashLoopBackOff container app: CrashLoopBackOff. last exit code 1 (Error), restartCount 2 2026-08-30 21:07:34 1
BackOff Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(21af0a9a-f38f-435b-988f-431896827f61) 2026-08-30 21:07:43 3
CrashLoopBackOff container app: CrashLoopBackOff. last exit code 1 (Error), restartCount 3 2026-08-30 21:07:34 1
RestartStorm 4 restarts observed in the trend window (total 4) 2026-08-30 21:07:34 1
ReadinessFlapping pod readiness changed 6 times in the trend window without restarting 2026-08-30 21:07:34 1
RestartStorm 3 restarts observed in the trend window (total 3) 2026-08-30 21:07:34 1
RestartStorm 3 restarts observed in the trend window (total 3) 2026-08-30 21:07:34 1
RestartStorm 4 restarts observed in the trend window (total 4) 2026-08-30 21:07:34 1
BackOff Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(21af0a9a-f38f-435b-988f-431896827f61) 2026-08-30 21:07:43 4
BackOff Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(21af0a9a-f38f-435b-988f-431896827f61) 2026-08-30 21:07:43 5
CrashLoopBackOff container app: CrashLoopBackOff. last exit code 1 (Error), restartCount 4 2026-08-30 21:07:34 1
RestartStorm 5 restarts observed in the trend window (total 5) 2026-08-30 21:07:34 1
BackOff Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(21af0a9a-f38f-435b-988f-431896827f61) 2026-08-30 21:07:43 6
KubeDeploymentReplicasMismatch Deployment hephaisto-chaos/c11-transient has fewer available replicas than desired and has not progressed in 5 minutes. This metric states THAT the Deployment is short; it never states WHY. The reason (unschedulable, image pull, config error, crash) lives in the pod's status and in Events. 2026-08-30 21:09:56 1

state transitions

  1. 2026-08-30 21:07:43 Detected DEMO DATA — replayed from cassette c11, recorded against a real k3s cluster. Investigated by gpt-oss:120b on 2026-09-01 against a tool trace from gemini-3.7-flash, and graded Correct against the answer key. Timestamps are the original recording times.
  2. 2026-09-01 21:49:31 Detected → Investigating Investigating with gpt-oss:120b.
  3. 2026-09-01 21:50:59 Investigating → Escalated Diagnosed, and a plan was proposed. Nothing executes in Observe mode.

investigation

model
gpt-oss:120b
steps
12
tool calls
11
tokens
154.6k in / 3.2k out
cost
$0.0052
confidence
0.85
ended
Concluded

trace

  1. 1 llm model turn internal 15.6s · 9.1k tok · $0.0003

    model output — its reasoning, and the tools it asked for

    -> calls get_pod_logs
  2. 2 tool get_pod_logs kubernetes 0ms · 238 B

    arguments

    {"container":null,"name":"c11-transient-6f59fc7fcc-27h6g","namespace":"hephaisto-chaos","previous":true}

    result digest — what the model actually saw

    [step 01a05ef3-209b-77a7-becb-76df196e84f1] get_pod_logs
    log digest: 5 lines, 238 bytes
    
    -- last 5 lines --
    previous container logs for hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g
    log digest: 1 lines, 111 bytes
    
    -- last 1 lines --
    unable to retrieve container logs for docker://967b485a63579d63980439cf38e21dc3634e77c18696b7cd69a91008d330e563
    
  3. 3 llm model turn internal 2.2s · 9.3k tok · $0.0003

    model output — its reasoning, and the tools it asked for

    -> calls describe_pod
  4. 4 tool describe_pod kubernetes 0ms · 6.4 KiB ~ truncated

    arguments

    {"name":"c11-transient-6f59fc7fcc-27h6g","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef3-294a-7380-8e92-d1fc9b2aefe4] describe_pod
    log digest: 212 lines, 6560 bytes
    
    -- repeated patterns --
    x7 [#59 .. #199]         cpu: 100m
    x6 [#124 .. #191]     observedGeneration: 1
    x5 [#63 .. #202]         memory: 16Mi
    x3 [#57 .. #197]     resources:
    x3 [#58 .. #198]       limits:
    x3 [#60 .. #200]         memory: 64Mi
    x3 [#61 .. #201]       requests:
    x3 [#70 .. #183]       name: pod-scope
    x3 [#125 .. #145]     status: "True"
    x3 [#151 .. #174]     containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
    
    -- notable lines --
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
    
    -- last 40 lines --
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
    [truncated: 155 of 212 lines omitted]
    
    raw result — the untruncated tool output (6.4 KiB)
    apiVersion: v1
    kind: Pod
    metadata:
      creationTimestamp: "2026-08-30T21:07:34Z"
      generateName: c11-transient-6f59fc7fcc-
      generation: 1
      labels:
        app.kubernetes.io/managed-by: tilt
        app.kubernetes.io/name: c11-transient
        hephaisto.chaos/fault: transient
        hephaisto.chaos/scenario: c11
        pod-template-hash: 6f59fc7fcc
        tilt.dev/pod-template-hash: 73708f39b493a99ce5e3
      name: c11-transient-6f59fc7fcc-27h6g
      namespace: hephaisto-chaos
      ownerReferences:
      - apiVersion: apps/v1
        kind: ReplicaSet
        blockOwnerDeletion: true
        controller: true
        name: c11-transient-6f59fc7fcc
        uid: 0f3f429e-7ae8-4fb6-bbbc-d6f76bb64e27
      uid: 21af0a9a-f38f-435b-988f-431896827f61
    spec:
      containers:
      - args:
        - |
          sleep 2
    
          # Count this POD once. The marker is on the emptyDir, so the kubelet
          # restarting this container inside the crash loop finds it already
          # there and the generation does not advance.
          if [ ! -f /pod/counted ]; then
            touch /pod/counted
            n=$(cat /data/generation 2>/dev/null || echo 0)
            echo $((n + 1)) > /data/generation
          fi
    
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
          echo "recovered: no stale lock at generation $gen"
    
          # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
          # workload whether it is settled, so this has to outlive all three.
          while true; do sleep 30; done
        command:
        - /bin/sh
        - -c
        image: busybox:1.37
        imagePullPolicy: IfNotPresent
        name: app
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
      dnsPolicy: ClusterFirst
      enableServiceLinks: true
      nodeName: lima-rancher-desktop
      preemptionPolicy: PreemptLowerPriority
      priority: 0
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 1
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 300
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 300
      volumes:
      - name: state
        persistentVolumeClaim:
          claimName: c11-transient-state
      - emptyDir: {}
        name: pod-scope
      - name: kube-api-access-glqrl
        projected:
          defaultMode: 420
          sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              items:
              - key: ca.crt
                path: ca.crt
              name: kube-root-ca.crt
          - downwardAPI:
              items:
              - fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
                path: namespace
    status:
      allocatedResources:
        cpu: 10m
        memory: 16Mi
      conditions:
      - lastTransitionTime: "2026-08-30T21:07:37Z"
        observedGeneration: 1
        status: "True"
        type: PodReadyToStartContainers
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: Initialized
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: Ready
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: ContainersReady
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: PodScheduled
      containerStatuses:
      - allocatedResources:
          cpu: 10m
          memory: 16Mi
        containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
        image: busybox:1.37
        imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
        lastState:
          terminated:
            containerID: docker://967b485a63579d63980439cf38e21dc3634e77c18696b7cd69a91008d330e563
            exitCode: 1
            finishedAt: "2026-08-30T21:09:17Z"
            reason: Error
            startedAt: "2026-08-30T21:09:15Z"
        name: app
        ready: false
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 5
        started: false
        state:
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
  5. 5 llm model turn internal 4.9s · 10.4k tok · $0.0003

    model output — its reasoning, and the tools it asked for

    -> calls get_pod_logs
  6. 6 tool get_pod_logs kubernetes 0ms · 354 B

    arguments

    {"container":null,"name":"c11-transient-6f59fc7fcc-27h6g","namespace":"hephaisto-chaos","previous":false}

    result digest — what the model actually saw

    [step 01a05ef3-3c6f-7b7c-8d62-2fb3cf032ab1] get_pod_logs
    log digest: 8 lines, 354 bytes
    
    -- repeated patterns --
    x2 [2026-08-30T21:10:41.965602440Z .. 2026-08-30T21:10:41.965602440Z] FATAL: stale lock held by generation 1; this pod cannot recover in place
    
    -- notable lines --
    log digest: 1 lines, 104 bytes
    
    -- notable lines --
    2026-08-30T21:10:41.965602440Z FATAL: stale lock held by generation 1; this pod cannot recover in place
    
    -- last 1 lines --
    2026-08-30T21:10:41.965602440Z FATAL: stale lock held by generation 1; this pod cannot recover in place
    
    -- last 8 lines --
    current container logs for hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g
    log digest: 1 lines, 104 bytes
    
    -- notable lines --
    2026-08-30T21:10:41.965602440Z FATAL: stale lock held by generation 1; this pod cannot recover in place
    
    -- last 1 lines --
    2026-08-30T21:10:41.965602440Z FATAL: stale lock held by generation 1; this pod cannot recover in place
    
  7. 7 llm model turn internal 3.6s · 10.7k tok · $0.0003

    model output — its reasoning, and the tools it asked for

    -> calls describe_pod
  8. 8 tool describe_pod kubernetes 0ms · 6.4 KiB ~ truncated

    arguments

    {"name":"c11-transient-6f59fc7fcc-27h6g","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef3-4a9a-7e09-8b1e-90293db8bf90] describe_pod
    log digest: 212 lines, 6560 bytes
    
    -- repeated patterns --
    x7 [#59 .. #199]         cpu: 100m
    x6 [#124 .. #191]     observedGeneration: 1
    x5 [#63 .. #202]         memory: 16Mi
    x3 [#57 .. #197]     resources:
    x3 [#58 .. #198]       limits:
    x3 [#60 .. #200]         memory: 64Mi
    x3 [#61 .. #201]       requests:
    x3 [#70 .. #183]       name: pod-scope
    x3 [#125 .. #145]     status: "True"
    x3 [#151 .. #174]     containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
    
    -- notable lines --
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
    
    -- last 40 lines --
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
    [truncated: 155 of 212 lines omitted]
    
    raw result — the untruncated tool output (6.4 KiB)
    apiVersion: v1
    kind: Pod
    metadata:
      creationTimestamp: "2026-08-30T21:07:34Z"
      generateName: c11-transient-6f59fc7fcc-
      generation: 1
      labels:
        app.kubernetes.io/managed-by: tilt
        app.kubernetes.io/name: c11-transient
        hephaisto.chaos/fault: transient
        hephaisto.chaos/scenario: c11
        pod-template-hash: 6f59fc7fcc
        tilt.dev/pod-template-hash: 73708f39b493a99ce5e3
      name: c11-transient-6f59fc7fcc-27h6g
      namespace: hephaisto-chaos
      ownerReferences:
      - apiVersion: apps/v1
        kind: ReplicaSet
        blockOwnerDeletion: true
        controller: true
        name: c11-transient-6f59fc7fcc
        uid: 0f3f429e-7ae8-4fb6-bbbc-d6f76bb64e27
      uid: 21af0a9a-f38f-435b-988f-431896827f61
    spec:
      containers:
      - args:
        - |
          sleep 2
    
          # Count this POD once. The marker is on the emptyDir, so the kubelet
          # restarting this container inside the crash loop finds it already
          # there and the generation does not advance.
          if [ ! -f /pod/counted ]; then
            touch /pod/counted
            n=$(cat /data/generation 2>/dev/null || echo 0)
            echo $((n + 1)) > /data/generation
          fi
    
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
          echo "recovered: no stale lock at generation $gen"
    
          # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
          # workload whether it is settled, so this has to outlive all three.
          while true; do sleep 30; done
        command:
        - /bin/sh
        - -c
        image: busybox:1.37
        imagePullPolicy: IfNotPresent
        name: app
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
      dnsPolicy: ClusterFirst
      enableServiceLinks: true
      nodeName: lima-rancher-desktop
      preemptionPolicy: PreemptLowerPriority
      priority: 0
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 1
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 300
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 300
      volumes:
      - name: state
        persistentVolumeClaim:
          claimName: c11-transient-state
      - emptyDir: {}
        name: pod-scope
      - name: kube-api-access-glqrl
        projected:
          defaultMode: 420
          sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              items:
              - key: ca.crt
                path: ca.crt
              name: kube-root-ca.crt
          - downwardAPI:
              items:
              - fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
                path: namespace
    status:
      allocatedResources:
        cpu: 10m
        memory: 16Mi
      conditions:
      - lastTransitionTime: "2026-08-30T21:07:37Z"
        observedGeneration: 1
        status: "True"
        type: PodReadyToStartContainers
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: Initialized
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: Ready
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: ContainersReady
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: PodScheduled
      containerStatuses:
      - allocatedResources:
          cpu: 10m
          memory: 16Mi
        containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
        image: busybox:1.37
        imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
        lastState:
          terminated:
            containerID: docker://967b485a63579d63980439cf38e21dc3634e77c18696b7cd69a91008d330e563
            exitCode: 1
            finishedAt: "2026-08-30T21:09:17Z"
            reason: Error
            startedAt: "2026-08-30T21:09:15Z"
        name: app
        ready: false
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 5
        started: false
        state:
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
  9. 9 llm model turn internal 4.5s · 11.7k tok · $0.0004

    model output — its reasoning, and the tools it asked for

    -> calls describe_pod
  10. 10 tool describe_pod kubernetes 0ms · 6.4 KiB ~ truncated

    arguments

    {"name":"c11-transient-6f59fc7fcc-27h6g","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef3-5c20-77db-ad62-ef915f0a920c] describe_pod
    log digest: 212 lines, 6560 bytes
    
    -- repeated patterns --
    x7 [#59 .. #199]         cpu: 100m
    x6 [#124 .. #191]     observedGeneration: 1
    x5 [#63 .. #202]         memory: 16Mi
    x3 [#57 .. #197]     resources:
    x3 [#58 .. #198]       limits:
    x3 [#60 .. #200]         memory: 64Mi
    x3 [#61 .. #201]       requests:
    x3 [#70 .. #183]       name: pod-scope
    x3 [#125 .. #145]     status: "True"
    x3 [#151 .. #174]     containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
    
    -- notable lines --
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
    
    -- last 40 lines --
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
    [truncated: 155 of 212 lines omitted]
    
    raw result — the untruncated tool output (6.4 KiB)
    apiVersion: v1
    kind: Pod
    metadata:
      creationTimestamp: "2026-08-30T21:07:34Z"
      generateName: c11-transient-6f59fc7fcc-
      generation: 1
      labels:
        app.kubernetes.io/managed-by: tilt
        app.kubernetes.io/name: c11-transient
        hephaisto.chaos/fault: transient
        hephaisto.chaos/scenario: c11
        pod-template-hash: 6f59fc7fcc
        tilt.dev/pod-template-hash: 73708f39b493a99ce5e3
      name: c11-transient-6f59fc7fcc-27h6g
      namespace: hephaisto-chaos
      ownerReferences:
      - apiVersion: apps/v1
        kind: ReplicaSet
        blockOwnerDeletion: true
        controller: true
        name: c11-transient-6f59fc7fcc
        uid: 0f3f429e-7ae8-4fb6-bbbc-d6f76bb64e27
      uid: 21af0a9a-f38f-435b-988f-431896827f61
    spec:
      containers:
      - args:
        - |
          sleep 2
    
          # Count this POD once. The marker is on the emptyDir, so the kubelet
          # restarting this container inside the crash loop finds it already
          # there and the generation does not advance.
          if [ ! -f /pod/counted ]; then
            touch /pod/counted
            n=$(cat /data/generation 2>/dev/null || echo 0)
            echo $((n + 1)) > /data/generation
          fi
    
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
          echo "recovered: no stale lock at generation $gen"
    
          # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
          # workload whether it is settled, so this has to outlive all three.
          while true; do sleep 30; done
        command:
        - /bin/sh
        - -c
        image: busybox:1.37
        imagePullPolicy: IfNotPresent
        name: app
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
      dnsPolicy: ClusterFirst
      enableServiceLinks: true
      nodeName: lima-rancher-desktop
      preemptionPolicy: PreemptLowerPriority
      priority: 0
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 1
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 300
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 300
      volumes:
      - name: state
        persistentVolumeClaim:
          claimName: c11-transient-state
      - emptyDir: {}
        name: pod-scope
      - name: kube-api-access-glqrl
        projected:
          defaultMode: 420
          sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              items:
              - key: ca.crt
                path: ca.crt
              name: kube-root-ca.crt
          - downwardAPI:
              items:
              - fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
                path: namespace
    status:
      allocatedResources:
        cpu: 10m
        memory: 16Mi
      conditions:
      - lastTransitionTime: "2026-08-30T21:07:37Z"
        observedGeneration: 1
        status: "True"
        type: PodReadyToStartContainers
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: Initialized
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: Ready
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: ContainersReady
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: PodScheduled
      containerStatuses:
      - allocatedResources:
          cpu: 10m
          memory: 16Mi
        containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
        image: busybox:1.37
        imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
        lastState:
          terminated:
            containerID: docker://967b485a63579d63980439cf38e21dc3634e77c18696b7cd69a91008d330e563
            exitCode: 1
            finishedAt: "2026-08-30T21:09:17Z"
            reason: Error
            startedAt: "2026-08-30T21:09:15Z"
        name: app
        ready: false
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 5
        started: false
        state:
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
  11. 11 llm model turn internal 4.3s · 12.6k tok · $0.0004

    model output — its reasoning, and the tools it asked for

    -> calls describe_pod
  12. 12 tool describe_pod kubernetes 0ms · 6.4 KiB ~ truncated

    arguments

    {"name":"c11-transient-6f59fc7fcc-27h6g","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef3-6d15-74f0-906e-b3deb71a3a12] describe_pod
    log digest: 212 lines, 6560 bytes
    
    -- repeated patterns --
    x7 [#59 .. #199]         cpu: 100m
    x6 [#124 .. #191]     observedGeneration: 1
    x5 [#63 .. #202]         memory: 16Mi
    x3 [#57 .. #197]     resources:
    x3 [#58 .. #198]       limits:
    x3 [#60 .. #200]         memory: 64Mi
    x3 [#61 .. #201]       requests:
    x3 [#70 .. #183]       name: pod-scope
    x3 [#125 .. #145]     status: "True"
    x3 [#151 .. #174]     containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
    
    -- notable lines --
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
    
    -- last 40 lines --
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
    [truncated: 155 of 212 lines omitted]
    
    raw result — the untruncated tool output (6.4 KiB)
    apiVersion: v1
    kind: Pod
    metadata:
      creationTimestamp: "2026-08-30T21:07:34Z"
      generateName: c11-transient-6f59fc7fcc-
      generation: 1
      labels:
        app.kubernetes.io/managed-by: tilt
        app.kubernetes.io/name: c11-transient
        hephaisto.chaos/fault: transient
        hephaisto.chaos/scenario: c11
        pod-template-hash: 6f59fc7fcc
        tilt.dev/pod-template-hash: 73708f39b493a99ce5e3
      name: c11-transient-6f59fc7fcc-27h6g
      namespace: hephaisto-chaos
      ownerReferences:
      - apiVersion: apps/v1
        kind: ReplicaSet
        blockOwnerDeletion: true
        controller: true
        name: c11-transient-6f59fc7fcc
        uid: 0f3f429e-7ae8-4fb6-bbbc-d6f76bb64e27
      uid: 21af0a9a-f38f-435b-988f-431896827f61
    spec:
      containers:
      - args:
        - |
          sleep 2
    
          # Count this POD once. The marker is on the emptyDir, so the kubelet
          # restarting this container inside the crash loop finds it already
          # there and the generation does not advance.
          if [ ! -f /pod/counted ]; then
            touch /pod/counted
            n=$(cat /data/generation 2>/dev/null || echo 0)
            echo $((n + 1)) > /data/generation
          fi
    
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
          echo "recovered: no stale lock at generation $gen"
    
          # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
          # workload whether it is settled, so this has to outlive all three.
          while true; do sleep 30; done
        command:
        - /bin/sh
        - -c
        image: busybox:1.37
        imagePullPolicy: IfNotPresent
        name: app
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
      dnsPolicy: ClusterFirst
      enableServiceLinks: true
      nodeName: lima-rancher-desktop
      preemptionPolicy: PreemptLowerPriority
      priority: 0
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 1
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 300
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 300
      volumes:
      - name: state
        persistentVolumeClaim:
          claimName: c11-transient-state
      - emptyDir: {}
        name: pod-scope
      - name: kube-api-access-glqrl
        projected:
          defaultMode: 420
          sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              items:
              - key: ca.crt
                path: ca.crt
              name: kube-root-ca.crt
          - downwardAPI:
              items:
              - fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
                path: namespace
    status:
      allocatedResources:
        cpu: 10m
        memory: 16Mi
      conditions:
      - lastTransitionTime: "2026-08-30T21:07:37Z"
        observedGeneration: 1
        status: "True"
        type: PodReadyToStartContainers
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: Initialized
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: Ready
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: ContainersReady
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: PodScheduled
      containerStatuses:
      - allocatedResources:
          cpu: 10m
          memory: 16Mi
        containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
        image: busybox:1.37
        imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
        lastState:
          terminated:
            containerID: docker://967b485a63579d63980439cf38e21dc3634e77c18696b7cd69a91008d330e563
            exitCode: 1
            finishedAt: "2026-08-30T21:09:17Z"
            reason: Error
            startedAt: "2026-08-30T21:09:15Z"
        name: app
        ready: false
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 5
        started: false
        state:
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
  13. 13 llm model turn internal 5.4s · 13.6k tok · $0.0004

    model output — its reasoning, and the tools it asked for

    -> calls describe_pod
  14. 14 tool describe_pod kubernetes 0ms · 6.4 KiB ~ truncated

    arguments

    {"name":"c11-transient-6f59fc7fcc-27h6g","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef3-824b-7f4f-a578-364033095699] describe_pod
    log digest: 212 lines, 6560 bytes
    
    -- repeated patterns --
    x7 [#59 .. #199]         cpu: 100m
    x6 [#124 .. #191]     observedGeneration: 1
    x5 [#63 .. #202]         memory: 16Mi
    x3 [#57 .. #197]     resources:
    x3 [#58 .. #198]       limits:
    x3 [#60 .. #200]         memory: 64Mi
    x3 [#61 .. #201]       requests:
    x3 [#70 .. #183]       name: pod-scope
    x3 [#125 .. #145]     status: "True"
    x3 [#151 .. #174]     containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
    
    -- notable lines --
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
    
    -- last 40 lines --
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
    [truncated: 155 of 212 lines omitted]
    
    raw result — the untruncated tool output (6.4 KiB)
    apiVersion: v1
    kind: Pod
    metadata:
      creationTimestamp: "2026-08-30T21:07:34Z"
      generateName: c11-transient-6f59fc7fcc-
      generation: 1
      labels:
        app.kubernetes.io/managed-by: tilt
        app.kubernetes.io/name: c11-transient
        hephaisto.chaos/fault: transient
        hephaisto.chaos/scenario: c11
        pod-template-hash: 6f59fc7fcc
        tilt.dev/pod-template-hash: 73708f39b493a99ce5e3
      name: c11-transient-6f59fc7fcc-27h6g
      namespace: hephaisto-chaos
      ownerReferences:
      - apiVersion: apps/v1
        kind: ReplicaSet
        blockOwnerDeletion: true
        controller: true
        name: c11-transient-6f59fc7fcc
        uid: 0f3f429e-7ae8-4fb6-bbbc-d6f76bb64e27
      uid: 21af0a9a-f38f-435b-988f-431896827f61
    spec:
      containers:
      - args:
        - |
          sleep 2
    
          # Count this POD once. The marker is on the emptyDir, so the kubelet
          # restarting this container inside the crash loop finds it already
          # there and the generation does not advance.
          if [ ! -f /pod/counted ]; then
            touch /pod/counted
            n=$(cat /data/generation 2>/dev/null || echo 0)
            echo $((n + 1)) > /data/generation
          fi
    
          gen=$(cat /data/generation)
    
          if [ "$gen" -lt 2 ]; then
            echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"
            exit 1
          fi
    
          echo "recovered: no stale lock at generation $gen"
    
          # Stay up and Ready. Verification at T+60s, T+5m and T+15m asks the
          # workload whether it is settled, so this has to outlive all three.
          while true; do sleep 30; done
        command:
        - /bin/sh
        - -c
        image: busybox:1.37
        imagePullPolicy: IfNotPresent
        name: app
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
      dnsPolicy: ClusterFirst
      enableServiceLinks: true
      nodeName: lima-rancher-desktop
      preemptionPolicy: PreemptLowerPriority
      priority: 0
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      serviceAccount: default
      serviceAccountName: default
      terminationGracePeriodSeconds: 1
      tolerations:
      - effect: NoExecute
        key: node.kubernetes.io/not-ready
        operator: Exists
        tolerationSeconds: 300
      - effect: NoExecute
        key: node.kubernetes.io/unreachable
        operator: Exists
        tolerationSeconds: 300
      volumes:
      - name: state
        persistentVolumeClaim:
          claimName: c11-transient-state
      - emptyDir: {}
        name: pod-scope
      - name: kube-api-access-glqrl
        projected:
          defaultMode: 420
          sources:
          - serviceAccountToken:
              expirationSeconds: 3607
              path: token
          - configMap:
              items:
              - key: ca.crt
                path: ca.crt
              name: kube-root-ca.crt
          - downwardAPI:
              items:
              - fieldRef:
                  apiVersion: v1
                  fieldPath: metadata.namespace
                path: namespace
    status:
      allocatedResources:
        cpu: 10m
        memory: 16Mi
      conditions:
      - lastTransitionTime: "2026-08-30T21:07:37Z"
        observedGeneration: 1
        status: "True"
        type: PodReadyToStartContainers
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: Initialized
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: Ready
      - lastTransitionTime: "2026-08-30T21:10:42Z"
        message: 'containers with unready status: [app]'
        observedGeneration: 1
        reason: ContainersNotReady
        status: "False"
        type: ContainersReady
      - lastTransitionTime: "2026-08-30T21:07:36Z"
        observedGeneration: 1
        status: "True"
        type: PodScheduled
      containerStatuses:
      - allocatedResources:
          cpu: 10m
          memory: 16Mi
        containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
        image: busybox:1.37
        imageID: docker-pullable://busybox@sha256:9db7b59979c38555a39def84a31fb98b5296952f9e3afd4f6f11f05b07adfab0
        lastState:
          terminated:
            containerID: docker://967b485a63579d63980439cf38e21dc3634e77c18696b7cd69a91008d330e563
            exitCode: 1
            finishedAt: "2026-08-30T21:09:17Z"
            reason: Error
            startedAt: "2026-08-30T21:09:15Z"
        name: app
        ready: false
        resources:
          limits:
            cpu: 100m
            memory: 64Mi
          requests:
            cpu: 10m
            memory: 16Mi
        restartCount: 5
        started: false
        state:
          terminated:
            containerID: docker://c729adae3d366406f0dd368e3e0938fb011314b0ad617eab3b857a1246778e75
            exitCode: 1
            finishedAt: "2026-08-30T21:10:41Z"
            reason: Error
            startedAt: "2026-08-30T21:10:39Z"
        volumeMounts:
        - mountPath: /data
          name: state
        - mountPath: /pod
          name: pod-scope
        - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
          name: kube-api-access-glqrl
          readOnly: true
          recursiveReadOnly: Disabled
      hostIP: 0.0.0.0
      hostIPs:
      - ip: 0.0.0.0
      observedGeneration: 1
      phase: Running
      podIP: 0.0.0.0
      podIPs:
      - ip: 0.0.0.0
      qosClass: Burstable
      resources:
        limits:
          cpu: 100m
          memory: 64Mi
        requests:
          memory: 16Mi
      startTime: "2026-08-30T21:07:36Z"
    
    events for this pod:
    type     reason     count  objects                             first  last  message
    -------  ---------  -----  ----------------------------------  -----  ----  ------------------------------------------------------------------------------------------------
    Warning  BackOff    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Back-off restarting failed container app in pod c11-transient-6f59fc7fcc-27h6g_hephaisto-chaos(…
    Normal   Pulled     6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container image "busybox:1.37" already present on machine and can be accessed by the pod
    Normal   Created    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container created
    Normal   Started    6      Pod/c11-transient-6f59fc7fcc-27h6g  1m     1m    Container started
    Normal   Scheduled  1      Pod/c11-transient-6f59fc7fcc-27h6g  4m     4m    Successfully assigned hephaisto-chaos/c11-transient-6f59fc7fcc-27h6g to lima-rancher-desktop
    
  15. 15 llm model turn internal 4.1s · 14.4k tok · $0.0005

    model output — its reasoning, and the tools it asked for

    -> calls list_pvcs
  16. 16 tool list_pvcs kubernetes 0ms · 505 B

    arguments

    {"namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef3-924f-7eec-8a19-b50a240e52ff] list_pvcs
    log digest: 4 lines, 505 bytes
    
    -- last 4 lines --
    name                 phase    capacity  requested  access modes   storageclass  volume                                    age
    -------------------  -------  --------  ---------  -------------  ------------  ----------------------------------------  ----
    c11-transient-state  Bound    64Mi      64Mi       ReadWriteOnce  local-path    pvc-ba6ce87c-dff3-4d85-9e54-8a8ae0d0130a  4m
    c6-diskfill-data     Pending  -         1Gi        ReadWriteOnce  local-path    -                                         2d9h
    
  17. 17 llm model turn internal 1.4s · 14.6k tok · $0.0004

    model output — its reasoning, and the tools it asked for

    -> calls who_owns
  18. 18 tool who_owns kubernetes 0ms · 309 B

    arguments

    {"kind":"Pod","name":"c11-transient-61...","namespace":"hephaisto-chaos"}

    result digest — what the model actually saw

    [step 01a05ef3-97d3-7559-9856-c66739874c03] who_owns
    log digest: 3 lines, 309 bytes
    
    -- last 3 lines --
    ownership chain: Pod/c11-transient-6f59fc7fcc-27h6g -> ReplicaSet/c11-transient-6f59fc7fcc -> Deployment/c11-transient
    top-level controller: Deployment/c11-transient
    Reason about the top-level controller. Pod names change on every restart, so a conclusion keyed on one is stale as soon as the pod is replaced.
    
  19. 19 llm model turn internal 13.5s · 15.5k tok · $0.0006

    model output — its reasoning, and the tools it asked for

    -> calls conclude
  20. 20 tool conclude internal 0ms · 129 B x failed
    x The arguments dictionary is missing a value for the required parameter 'request'. (Parameter 'arguments')

    arguments

    {"findings":[{"category":"application","confidence":0.85,"evidence":[{"excerpt":"2026-08-30T21:10:41.965602440Z FATAL: stale lock held by generation 1; this pod cannot recover in place","step_id":"01a05ef3-3c6f-7b7c-8d62-2fb3cf032ab1"},{"excerpt":"gen=$(cat /data/generation)\n\n      if [ \u0022$gen\u0022 -lt 2 ]; then\n        echo \u0022FATAL: stale lock held by generation $gen; this pod cannot recover in place\u0022\n        exit 1","step_id":"01a05ef3-294a-7380-8e92-d1fc9b2aefe4"},{"excerpt":"c11-transient-state  Bound    64Mi      64Mi       ReadWriteOnce  local-path    pvc-ba6ce87c-dff3-4d85-9e54-8a8ae0d0130a","step_id":"01a05ef3-924f-7eec-8a19-b50a240e52ff"}],"hypothesis":"The container exits with code 1 because its startup script detects a stale lock file (generation 1) on the attached persistent volume and aborts, causing CrashLoopBackOff."}],"summary":"The CrashLoopBackOff is caused by the pod\u0027s own startup check aborting when it finds a stale lock (generation\u202F1) on its bound PVC. The script reads /data/generation, sees a value \u003C2, logs a fatal message and exits with code\u202F1, leading to repeated restarts."}

    result digest — what the model actually saw

    [step 01a05ef3-cc84-7770-9fcd-b807e41f4b22] conclude
    log digest: 1 lines, 129 bytes
    
    -- last 1 lines --
    ERROR: conclude failed: The arguments dictionary is missing a value for the required parameter 'request'. (Parameter 'arguments')
    
  21. 21 llm model turn internal 11.8s · 15.8k tok · $0.0006

    model output — its reasoning, and the tools it asked for

    -> calls conclude
  22. 22 tool conclude internal 0ms · 141 B

    arguments

    {"request":{"findings":[{"category":"application","confidence":0.85,"evidence":[{"excerpt":"2026-08-30T21:10:41.965602440Z FATAL: stale lock held by generation 1; this pod cannot recover in place","step_id":"01a05ef3-3c6f-7b7c-8d62-2fb3cf032ab1"},{"excerpt":"gen=$(cat /data/generation)\n\n      if [ \u0022$gen\u0022 -lt 2 ]; then\n        echo \u0022FATAL: stale lock held by generation $gen; this pod cannot recover in place\u0022\n        exit 1","step_id":"01a05ef3-294a-7380-8e92-d1fc9b2aefe4"},{"excerpt":"c11-transient-state  Bound    64Mi      64Mi       ReadWriteOnce  local-path    pvc-ba6ce87c-dff3-4d85-9e54-8a8ae0d0130a","step_id":"01a05ef3-924f-7eec-8a19-b50a240e52ff"}],"hypothesis":"The container exits with code 1 because its startup script detects a stale lock file (generation 1) on the attached persistent volume and aborts, causing CrashLoopBackOff."}],"summary":"The CrashLoopBackOff is caused by the pod\u0027s own startup check aborting when it finds a stale lock (generation\u202F1) on its bound PVC. The script reads /data/generation, sees a value \u003C2, logs a fatal message and exits with code\u202F1, leading to repeated restarts."}}

    result digest — what the model actually saw

    [step 01a05ef3-fa77-7a8e-bcd3-9dbf6b563c63] conclude
    log digest: 1 lines, 141 bytes
    
    -- last 1 lines --
    Conclusion recorded. Your citations are now checked against what the tools actually returned; any that do not match are discarded. Stop here.
    
  23. 23 llm model turn internal 8.0s · 16.0k tok · $0.0005

    model output — its reasoning, and the tools it asked for

    **Findings**
    
    | Category | Confidence | Evidence |
    |----------|------------|----------|
    | application | 0.85 | • `2026-08-30T21:10:41.965602440Z FATAL: stale lock held by generation 1; this pod cannot recover in place` (step 01a05ef3‑3c6f‑7b7c‑8d62‑2fb3cf032ab1) <br>• Script fragment showing the check:<br>`gen=$(cat /data/generation)`<br>`if [ "$gen" -lt 2 ]; then`<br>`echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place"` (step 01a05ef3‑294a‑7380‑8e92‑d1fc9b2aefe4) <br>• PVC bound to the pod, providing the `/data` volume where `generation` lives: `c11-transient-state  Bound    64Mi      64Mi ...` (step 01a05ef3‑924f‑7eec‑8a19‑b50a240e52ff) |
    
    **Hypothesis**
    
    The container exits with code 1 because its entrypoint script reads the file `/data/generation` from the attached PVC, finds a value `< 2` (generation 1), logs “FATAL: stale lock held by generation 1; this pod cannot recover in place”, and terminates. This intentional abort triggers CrashLoopBackOff.
    
    **Summary**
    
    The CrashLoopBackOff is caused by the pod’s own startup logic detecting a stale lock on its persistent volume and exiting with an error. The bound PVC (`c11-transient-state`) supplies the `generation` file that triggers the fatal check, leading to repeated restarts. Fix requires clearing or updating the lock/generation file (or adjusting the script) so the container can start successfully.
  24. 24 llm model turn internal 8.7s · 4.0k tok · $0.0001

    model output — its reasoning, and the tools it asked for

    {
      "summary": "The CrashLoopBackOff is caused by a stale lock file on the pod's PersistentVolumeClaim, which persists across pod restarts. Restarting the pod would not clear this state, so an automated action would not resolve the issue.",
      "no_action_required": true,
      "actions": []
    }

findings 1

primary application 0.85

The container exits with code 1 because its startup script detects a stale lock file (generation 1) on the attached persistent volume and aborts, causing CrashLoopBackOff.

  • step 6 2026-08-30T21:10:41.965602440Z FATAL: stale lock held by generation 1; this pod cannot recover in place
  • step 4 gen=$(cat /data/generation) if [ "$gen" -lt 2 ]; then echo "FATAL: stale lock held by generation $gen; this pod cannot recover in place" exit 1
  • step 16 c11-transient-state Bound 64Mi 64Mi ReadWriteOnce local-path pvc-ba6ce87c-dff3-4d85-9e54-8a8ae0d0130a

plan

! Would have done this — nothing was executed. The planning model holds no tools and emits JSON against a schema; execution is separate C# over a closed action vocabulary. Every action below was judged by the policy engine before anything could touch it.

The CrashLoopBackOff is caused by a stale lock file on the pod's PersistentVolumeClaim, which persists across pod restarts. Restarting the pod would not clear this state, so an automated action would not resolve the issue.

No action was proposed. The planner set no_action_required — which is the expected outcome for most incidents, and what the planning prompt tells it to default to.

how it was graded

root cause
Correct
plan
MissedAnAction
structurally sound
yes
recorded
2026-09-01
agent version
0.5.1-main.0.4+23df805946ec0c37b0adafafeb12130231adec93

prompt sha256:0bb9d614ab1e17fd STALE - prompts and runbooks now hash sha256:718988bb4e7837f3