Locked design for wave 1 of cluster security hardening. Plan only — implementation lives in beads
code-8ywc and follow-up commits. Captures:
- security.md: Kyverno policy table updated (Audit → Enforce planned for the four security policies
with the 31-namespace exclude list). New section "Audit Logging & Anomaly Detection" detailing the
K8s API audit policy, Vault audit device + X-Forwarded-For trust, source-IP anomaly rules (K9, V7,
S1), and the rejected-canary-tokens / rejected-K1 rationales. New section "NetworkPolicy
Default-Deny Egress" describing the observe-then-enforce (γ) approach for tier 3+4.
- monitoring.md: new "Security Alerts (Wave 1)" section listing the 16 rules (K2-K9, V1-V7, S1)
and the Loki ruler → Alertmanager → #security routing path.
- runbooks/security-incident.md (new): per-alert response playbook with LogQL queries, action
steps, false-positive triage, and SEV1 escalation.
- .claude/CLAUDE.md: new "Security Posture" section summarising the locked decisions: identity
allowlist is me@viktorbarzin.me ONLY, source-IP allowlist CIDRs, no public-IP access policy,
rationale for not adopting canary tokens.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
