helm-chart

A checklist for safely changing a Helm chart, the package used to configure and deploy an application on Kubernetes. It covers rendering the chart in several deployment setups and keeping its documentation consistent.

In plain words
What is it for?
Use it when editing deploy/helm/, adding configuration values, or fixing a failed helm-check.
Why use it?
It helps catch deployment mistakes before a chart is published, where an incorrect version cannot be replaced under the same tag.

Skill for Claude CodeCodex

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 skills/fold-run/fold/helm-chart
Any agent
npx skills add fold-run/fold --skill helm-chart
Clone the repo
git clone --depth 1 https://github.com/fold-run/fold

Made for: Claude Code, Codex.

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,071 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 $0.00061 $0.01071
Opus 5 $0.00030 $0.00535
Sonnet 5 $0.00012 $0.00214
Haiku 4.5 $0.00006 $0.00107

Measured 2d ago against content hash ce6e85692abf, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

helm-chart 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/skills/helm-chart/SKILL.md · 99 lines

How it starts

The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Changing the Helm chart

deploy/helm/fold is a published artifact: the release workflow packages it to oci://ghcr.io/fold-run/charts/fold and attests its provenance. A published OCI tag is immutable, so a mistake here cannot be amended in place — only superseded.

The gate

make helm-check

Three things, and the third is the one people forget exists:

  1. helm lint against ci/default-values.yaml.
  2. helm template against every ci/*.yaml, with --api-versions monitoring.coreos.com/v1 so the ServiceMonitor renders without a cluster.
  3. The required-config guard: rendering with no config must fail. A chart that installs with no upstreams would start a gateway that federates nothing, so the failure is the feature. If your change makes a bare helm template succeed, you have broken it.

Not part of make check — it needs helm on PATH, and the contributor toolchain stays Go-only. CI runs it as its own helm job.

The three ci values files are three deployment shapes

They are not examples; they are the render matrix. A new value should be exercised by at least one, and a value that changes rendering in a shape none of them covers needs a fourth or an extension to one.

File Shape it pins
default-values.yaml Minimal: inline config, no allowedHosts
existing-configmap-values.yaml Operator-managed ConfigMap, Redis by URL
full-values.yaml Ingress, HPA, PDB, ServiceMonitor, Redis via secret, secrets via envFrom

The probe Host-header trap

fold's DNS-rebinding protection covers /health like every other path, so a kubelet probe carries a Host the allowlist must admit. The chart resolves this three different ways, and each ci file exists to pin one:

  • No allowedHosts → the probe Host falls back to localhost.
  • allowedHosts set → it derives from allowedHosts[0].
  • existingConfigMapprobes.hostHeader is mandatory, because the chart cannot see inside an operator's ConfigMap to find the allowlist.

Read the full file on GitHub · 99 lines

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 · 99 lines · 61 tokens per session scan A ce6e85692abf

Subscribe to this mod's changes

helm-chart is a skill published in the GitHub repository fold-run/fold (1 stars, last pushed 2d ago), licensed Apache-2.0. It adds 61 tokens to every session and 1,071 once invoked, about $0.0003 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 2026-08-31.

Related

Other skills, from other repositories

nginx-to-higress-migration

Migrate from ingress-nginx to Higress in Kubernetes environments. Use when (1) analyzing existing ingress-nginx setup (2) reading nginx Ingress resources and ConfigMaps (3) installing Higress via helm with proper ingressClass (4) identifying unsupported nginx annotations (5) generating WASM plugins for nginx…

higress-group/higress · 99 tokens

helm-update

Apply helm chart updates for Bifrost. Detects config.schema.json changes since the last helm release, applies user-requested changes, updates values.yaml / values.schema.json / helpers.tpl, bumps Chart.yaml version, updates helm README (Latest Version + Upcoming section), creates a docs MDX changelog, and updates…

maximhq/bifrost · 97 tokens

plano-deployment-security

Apply Plano deployment and production security practices. Use for Docker networking, state storage choices, readiness checks, and environment-based secret handling.

katanemo/plano · 32 tokens

ecspresso

ECS deployment tool - deploy, manage, and troubleshoot ECS services.

kayac/ecspresso · 17 tokens

pvetui-cli

Use when querying or managing a Proxmox VE cluster via the pvetui CLI — listing nodes, guests, and tasks; creating and migrating VMs and LXC containers; managing storage content, downloading templates and OCI images, restoring backups, and installing Proxmox Community Scripts when the plugin is enabled. Requires…

devnullvoid/pvetui · 77 tokens

osx-tuning

Tune macOS resource limits and sysctls for best performance with Go development, Docker/OrbStack, and Linux VMs. Use this skill whenever the user asks to "tune macOS", "raise file descriptor limits", "fix ulimit", "optimize for Docker/Go/VM performance", "increase maxfiles/maxproc/somaxconn", or reports…

dimetron/pi-go · 132 tokens