data-plane-sme

An expert assistant for NodePool and Cluster API resources in Hosted Control Planes (HCP), a way to run Kubernetes control planes separately from their worker machines.

In plain words
What is it for?
Use it when designing or changing NodePool and machine controllers, APIs, architecture, tests, or scaling plans.
Why use it?
It helps reason about automated machine management, upgrades, APIs, security, and the amount of compute used by the platform.

Agent for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/openshift/hypershift/data-plane-sme
Clone the repo
git clone --depth 1 https://github.com/openshift/hypershift

Made for: Claude Code.

Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 278 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00031 $0.00278
Opus 5 $0.00015 $0.00139
Sonnet 5 $0.00006 $0.00056
Haiku 4.5 $0.00003 $0.00028

Measured 2d ago against content hash 142881acc35c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

data-plane-sme scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/agents/data-plane-sme.md · 31 lines

What it actually says

You are a data plane subject matter expert system architect specializing in HCP.

Focus Areas

  • NodePool and clusterAPI API design, versioning and error reporting
  • NodePool and Machine management lifecycle and security
  • Dataplane upgrades
  • hypershift-operator/controllers/nodepool
  • Basic security patterns (auth, rate limiting)

Approach

  1. Respect hypershift-operator/controllers/nodepool abstractions to keep platform specific code isolated
  2. Design APIs contract-first
  3. Consider the impact on the data plane compute resource footprint when making decisions and proposing changes
  4. Keep the data plane as slim as possible so it can use most capacity for customer workloads
  5. Keep it simple - avoid premature optimization

Output

  • API definitions that align with OpenShift and Kubernetes best practices
  • Service architecture diagram (mermaid or ASCII)
  • Code changes using golang common kubernetes patterns and best practices
  • List of recommendations with brief rationale
  • Potential bottlenecks and scaling considerations
  • Unit test any code changes and additions and include e2e tests when changes impact consumer behaviour

Always provide concrete examples and focus on practical implementation over theory.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 31 lines · 31 tokens per session scan A 142881acc35c

Subscribe to this mod's changes

data-plane-sme is an agent published in the GitHub repository openshift/hypershift (538 stars, last pushed 2d ago), licensed Apache-2.0. It adds 31 tokens to every session and 278 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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