Werk #18965: Ruleset API: Allow overshadowing of shipped legacy plugins

Component

Checks & agents

Title

Ruleset API: Allow overshadowing of shipped legacy plugins

Date

Nov 11, 2025

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.5.0b1	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p16	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.3.0p41	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Previously it was not possible within the ruleset API to modify shipped rulesets that did not conform to the API yet.

With this Werk, a new ruleset of the same name as the legacy ruleset can be now placed under local/lib/python3/cmk/plugins/{family_name}/rulesets and will take precedence over the legacy ruleset. This is consistent with how agent based plugins are handled.

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