Cobalt Core

Cobalt Core

Domain skill for the cobaltcore-dev project family — SAP Converged Cloud infrastructure components for KVM hypervisor management, metrics collection, and compute-node tooling.

Reference Loading Table

| Signal | Reference | Size | |--------|-----------|------| | kvm-exporter, metrics, prometheus, libvirt, hypervisor, collector, scrape, steal time, NUMA, cgroups, cloud hypervisor | references/kvm-exporter.md | ~800 lines | | goroutine, concurrency, semaphore, TryLock, sync.Map, race condition, socket exhaustion, scrape overlap, ClearScrapeCache | references/concurrency-patterns.md | ~200 lines | | test, mock, moq, unit test, E2E, Kind cluster, race detector, interfacemockgen, test-metrics.sh | references/testing-patterns.md | ~200 lines |

Load greedily. If the user's question touches any signal keyword, load the matching reference before responding. Multiple signals matching = load all matching references.

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Phase 1: IDENTIFY

Determine which cobaltcore component the user is asking about.

| Component | Repository | Reference | |-----------|-----------|-----------| | KVM Exporter | cobaltcore-dev/kvm-exporter | references/kvm-exporter.md |

If the component is not listed, tell the user no reference exists yet and offer to analyze the repo.

Gate: Component identified. Reference loaded. Proceed to Phase 2.

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Phase 2: RESPOND

Use loaded reference knowledge to answer the user's question. The references contain:

• Architecture and data flow diagrams
• Complete metric catalogs with types, labels, and descriptions
• Configuration options and environment variables
• Deployment models (Helm, DaemonSet, container specs)
• Code patterns (concurrency, caching, error handling)
• Testing strategies (unit mocks, E2E with Kind clusters)
• Alerting rules and operational concerns

For implementation questions involving Go code, pair with the go-patterns skill for language-specific patterns. For Prometheus/Grafana questions, pair with prometheus-grafana-engineer. For Kubernetes deployment questions, pair with kubernetes-helm-engineer.

Gate: Question answered with reference-backed specifics, not generic advice.

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Phase 3: EXTEND

When the user wants to add a new cobaltcore repo:

1. Analyze the repo systematically (README, go.mod, key source files, Dockerfile, Helm chart)
2. Create a new reference file at references/{repo-name}.md
3. Update the Reference Loading Table in this SKILL.md
4. Update the component table in Phase 1

Follow the structure established in references/kvm-exporter.md for consistency.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: notque
• Source: notque/vexjoy-agent
• License: MIT
• Homepage: https://vexjoy.com

Install and usage instructions live in the source repository linked above.