competition-container-runtime

Imported from zhaoxuya520/reverse-skill (CTF-Sandbox-Orchestrator/competition-container-runtime/SKILL.md). Install upstream with npx skills add zhaoxuya520/reverse-skill --skill competition-container-runtime. Copyright stays with the author.

Competition Container Runtime

Use this skill only as a downstream specialization after $ctf-sandbox-orchestrator is already active and has established sandbox assumptions, node ownership, and evidence priorities. If that has not happened yet, return to $ctf-sandbox-orchestrator first.

Use this skill when the challenge is really about what the live container or pod is doing now, not what the checked-in manifest claims it should do.

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Quick Start

1. Split intent from reality: manifest, image, startup, live mount, live route, live process.
2. Map host -> proxy -> container or pod -> mounted volume -> consuming process.
3. Keep secrets, rendered config, init output, and sidecar output separate from static manifests.
4. Prove one minimal live path from mounted or injected state to reachable behavior.
5. Reproduce the effect with the smallest runtime-specific chain.

Workflow

1. Map The Live Runtime

• Compare compose or kube manifests against running containers, pods, mounted volumes, env, sidecars, init containers, and entrypoints.
• Identify which process actually consumes the mounted secret, rendered config, or shared volume output.

2. Trace Route And Mount Boundaries

• Map virtual host, reverse proxy, service, container port, filesystem mount, and runtime-generated file paths together.
• Record whether the decisive state is image-baked, env-injected, mounted later, or written by an init/sidecar process.

3. Report The Runtime Deviation

• State the earliest point where live runtime diverges from checked-in intent.
• Keep one compact evidence chain from manifest or compose intent to live consumer behavior.

Read This Reference

• Load references/container-runtime.md for the runtime checklist, mount-chain checklist, and common live-vs-static pitfalls.
• If the hard part is kube API permissions, service-account trust, RBAC edges, admission mutations, or controller-created workload drift, prefer $competition-k8s-control-plane.
• If the hard part is Host-header routing, path-prefix rewriting, or route-to-service mapping across nodes, prefer $competition-runtime-routing.
• If the hard part is proving container-to-host crossover, kernel attack-surface preconditions, or stable escape primitives, prefer $competition-kernel-container-escape.
• If the hard part is replaying Linux secrets, socket trust edges, or host-to-host pivots after container foothold, prefer $competition-linux-credential-pivot.

What To Preserve

• Compose/Kubernetes fragments tied to live mounts or routes
• Container IDs, pod names, mount paths, sidecar outputs, rendered config paths, and consuming processes
• The exact route or file path that becomes reachable only at runtime