Skill: elastic-cli-usage (verified gotchas)

Use elastic_cli tool for all CLI operations — credentials are injected automatically. Pass argv as a JSON array of strings, e.g. ["es","cluster","health","--json"]. The elastic binary is NOT on PATH in the shell environment; never use bash for this.

For anything not listed here, call elastic_cli with ["es","<namespace>","--help"] or ["kb","<namespace>","--help"].

Shorthands

es = stack es, kb = stack kb. Both work.

Prefer MCP/native tools over CLI

Gotchas

Serverless: many cluster APIs return 410

These all fail on serverless with "not available in serverless mode":

• es cluster health / stats / get-settings
• es ilm get-lifecycle / get-status

Use es cat count --json to verify connectivity on serverless instead.

es indices list does not exist

Use es indices get --index "*" --json or es indices get-data-stream --json.

es cluster health-report does not exist

The subcommand is es cluster health. There is no health-report.

Agent builder subcommands use verbose REST-style names

kb agent-builder agents list and tools list do not exist. Real commands:

kb agent-builder get-agent-builder-agents --json
kb agent-builder get-agent-builder-tools --json

Pattern: <http-method>-<resource-path> throughout all of kb.

docs search and docs read require named flags, not positional args

# WRONG — "too many arguments" error
["docs","search","index lifecycle management"]
["docs","read","https://www.elastic.co/..."]

# CORRECT
["docs","search","--query","index lifecycle management"]
["docs","read","--path","https://www.elastic.co/docs/..."]

Also: old /guide/ URLs return (no output). Use elastic.co/docs/ URLs.

es esql query requires --query flag, not positional

# WRONG
["es","esql","query","FROM logs-* | LIMIT 1"]

# CORRECT
["es","esql","query","--query","FROM logs-* | LIMIT 1","--json"]

kb slo find-slos-op requires --space-id

Omitting it returns a validation error. Use --space-id default.

--output-fields and --output-template are per-subcommand flags (placed at end)

They are listed as global flags in the help but must come after the full subcommand. --output-fields returns {} for array responses — unreliable, avoid it. --output-template only works for top-level scalar fields. Just use --json and process the output.

Never block on stdin

Never use --input-file /dev/stdin or es helpers watch. These block forever and hang the elastic_cli tool with no way to cancel.