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elasticsearch-cluster-health

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Diagnose a non-green Elasticsearch cluster and surface the single most likely cause with remediation. Use when an operator reports yellow or red status, unassigned shards, allocation failures, or wants read-only triage before deeper investigation. Teaches replica-vs-primary impact, allocation decider classification, and data-loss awareness.

plugins/elasticsearch/skills/elasticsearch-cluster-health/SKILL.md

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# Diagnose Cluster Health

Triage a non-green Elasticsearch cluster read-only: localize the problem, classify the allocation decider, and report
the single most likely cause with remediation. Never mutate cluster state — surface findings and let the operator act.

<!-- begin-partial: preamble -->

## Environment Configuration

This skill executes Elasticsearch operations through the `elastic` CLI. If the
[`elastic` CLI](https://github.com/elastic/cli#configuration) is not installed, tell the user what it is needed for. Do
not guess credentials, call the HTTP API directly, or attempt other workarounds.

This skill references operations in HTTP-shorthand form (e.g., `GET /`, `GET /_cat/indices`, `GET /{index}/_mapping`,
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