post-mortem v2: pipeline team architecture with 4-stage agents [ci skip]

Split monolithic orchestrator into triage (haiku), historian (sonnet),
and report-writer (opus) stages. Each stage gets its own tool budget.
Added sev-context.sh for structured cluster context gathering.

.claude/scripts/sev-context.sh

@@ -0,0 +1,95 @@
+#!/usr/bin/env bash
+# sev-context.sh — Gather structured cluster context for post-mortem triage
+# Used by sev-triage agent and available to all pipeline stages
+set -euo pipefail
+
+KUBECONFIG="${KUBECONFIG:-/Users/viktorbarzin/code/infra/config}"
+INFRA_DIR="${INFRA_DIR:-/Users/viktorbarzin/code/infra}"
+export KUBECONFIG
+
+echo "=== NODE STATUS ==="
+kubectl get nodes -o custom-columns=\
+'NAME:.metadata.name,STATUS:.status.conditions[?(@.type=="Ready")].status,VERSION:.status.nodeInfo.kubeletVersion,CPU_CAP:.status.capacity.cpu,MEM_CAP:.status.capacity.memory' \
+  --no-headers 2>/dev/null || echo "ERROR: Cannot reach cluster"
+
+echo ""
+echo "=== UNHEALTHY PODS ==="
+# Pods not Running/Succeeded, with UTC start time instead of relative age
+kubectl get pods --all-namespaces \
+  --field-selector='status.phase!=Running,status.phase!=Succeeded' \
+  -o custom-columns=\
+'NAMESPACE:.metadata.namespace,POD:.metadata.name,STATUS:.status.phase,RESTARTS:.status.containerStatuses[0].restartCount,STARTED_UTC:.status.startTime,NODE:.spec.nodeName' \
+  --no-headers 2>/dev/null || true
+
+# Also show pods that are Running but have containers not ready or high restarts
+kubectl get pods --all-namespaces -o json 2>/dev/null | python3 -c "
+import json, sys
+try:
+    data = json.load(sys.stdin)
+except:
+    sys.exit(0)
+for pod in data.get('items', []):
+    ns = pod['metadata']['namespace']
+    name = pod['metadata']['name']
+    node = pod['spec'].get('nodeName', 'N/A')
+    start = pod['status'].get('startTime', 'N/A')
+    phase = pod['status'].get('phase', 'Unknown')
+    if phase != 'Running':
+        continue
+    for cs in pod['status'].get('containerStatuses', []):
+        restarts = cs.get('restartCount', 0)
+        ready = cs.get('ready', True)
+        if restarts > 3 or not ready:
+            reason = ''
+            waiting = cs.get('state', {}).get('waiting', {})
+            if waiting:
+                reason = waiting.get('reason', '')
+            print(f'{ns}\t{name}\t{phase}/NotReady\t{restarts}\t{start}\t{node}\t{reason}')
+            break
+" 2>/dev/null || true
+
+echo ""
+echo "=== RECENT EVENTS (last 2h, Warning/Error only) ==="
+kubectl get events --all-namespaces \
+  --field-selector='type!=Normal' \
+  --sort-by='.lastTimestamp' \
+  -o custom-columns=\
+'NAMESPACE:.metadata.namespace,TYPE:.type,REASON:.reason,OBJECT:.involvedObject.name,LAST_SEEN_UTC:.lastTimestamp,MESSAGE:.message' \
+  --no-headers 2>/dev/null | tail -50 || true
+
+echo ""
+echo "=== NAMESPACE TO STACK MAPPING ==="
+# Parse terragrunt.hcl files to map k8s namespaces to stack directories
+for tg in "$INFRA_DIR"/stacks/*/terragrunt.hcl; do
+    stack_dir=$(dirname "$tg")
+    stack_name=$(basename "$stack_dir")
+    # Try to find namespace from the stack - check main.tf for namespace references
+    ns=$(grep -h 'namespace' "$stack_dir"/main.tf 2>/dev/null | grep -oP '"\K[a-z0-9-]+(?=")' | head -1 || echo "$stack_name")
+    echo "$ns → stacks/$stack_name"
+done 2>/dev/null | sort -u || true
+
+echo ""
+echo "=== SERVICE TIERS ==="
+# Parse service-catalog.md for tier classifications
+catalog="$INFRA_DIR/.claude/reference/service-catalog.md"
+if [ -f "$catalog" ]; then
+    current_tier=""
+    while IFS= read -r line; do
+        case "$line" in
+            *"Tier: core"*)  current_tier="core" ;;
+            *"Tier: cluster"*) current_tier="cluster" ;;
+            *"Admin"*)       current_tier="admin" ;;
+            *"Active Use"*)  current_tier="active" ;;
+            *"Optional"*|*"Inactive"*) current_tier="optional" ;;
+        esac
+        if [[ "$line" =~ ^\|[[:space:]]+([a-z0-9_-]+)[[:space:]]+\| && "$current_tier" != "" ]]; then
+            svc="${BASH_REMATCH[1]}"
+            [[ "$svc" == "Service" || "$svc" == "---" ]] && continue
+            echo "$svc=$current_tier"
+        fi
+    done < "$catalog"
+fi
+
+echo ""
+echo "=== CURRENT UTC TIME ==="
+date -u '+%Y-%m-%dT%H:%M:%SZ'