Provides Helm 3 reference guidance for chart authoring, values merging, hooks, and release workflows.
npx skills add https://github.com/psmfd/pi-config --skill helm-expert-psmfd
Please help me install this Agent Skill. Skill: helm-expert Source: https://github.com/psmfd/pi-config/tree/main/agent/skills/helm-expert Command: npx skills add https://github.com/psmfd/pi-config --skill helm-expert-psmfd
-f files versus --set, and subchart values scoping including global.*. - Hooks and Releases: Documents hook types, weights, deletion policies, the hook-failed accumulation trap, and release workflows like --atomic, --wait, and rollback limitations. - Template Debugging and Diff Validation: Covers helm template, --dry-run modes, the lookup empty-cluster trap, whitespace control, and helm diff comparison semantics against the last successful release. - Use Case: When a helm upgrade fails because a list in values was unexpectedly replaced, the agent can diagnose the merge behavior and recommend the correct layering of values files. ## Quick Start Ask the agent to explain why your Helm values list was overwritten during an upgrade and how to structure values files for multiple environments.High-intent search queries and answers about installing and using this skill.
Helm deep-merges maps but completely replaces lists, which is the most common deployment surprise. `-f` files apply left to right with later files winning, and `--set` always overrides any `-f` file.
Use `helm template` for local rendering or `helm diff upgrade` to compare against the last successful release. Note that `helm diff` ignores manual `kubectl edit` changes, which the upgrade will overwrite.
A failed hook without a deletion policy leaves its resource in the cluster, so the next upgrade fails because the resource already exists. Set `helm.sh/hook-delete-policy: before-hook-creation` to avoid accumulation.
No. `helm rollback` only reverts manifests and values to a previous revision. Database migrations, external config changes, and hook side effects are not reverted and must be handled separately.
The `lookup` function returns an empty dict during `helm template` and `--dry-run=client` because there is no cluster connection. Templates using `lookup` must handle the empty case gracefully.
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