Min Kotlin Version
kotlin.min-kotlin-version
Ensures the declared Kotlin compiler version meets the configured
minimum (default: "1.8"). Reads .lang.kotlin.version. Skips when the
version is not detected — pair with kotlin-version-pinned if you want
presence to be enforced too.
Compatible Integrations
This guardrail works with the following integrations. Click to see how to use Min Kotlin Version with each collector.
Enable This Guardrail
Add the parent policy to your lunar-config.yml to enable this guardrail.
policies:
- uses: github://earthly/lunar-lib/policies/kotlin@v1.0.5
include: [min-kotlin-version]
# with: ...How This Guardrail Works
This guardrail is part of the Kotlin Project Guardrails policy. It evaluates data collected by integrations and produces a pass/fail check with actionable feedback.
When enabled, this check runs automatically on every PR and in AI coding workflows, providing real-time enforcement of your engineering standards.
Learn How Lunar Works →Configuration Options
These inputs can be configured in your lunar-config.yml to customize
how the parent policy (and this guardrail) behaves.
| Input | Required | Default | Description |
|---|---|---|---|
min_kotlin_version
|
Optional |
1.8
|
Minimum required Kotlin compiler version (e.g., "1.8", "1.9", "2.0"). Compared with semantic-version semantics — "1.8" matches 1.8.x and above, but rejects 1.7.x. |
Kotlin Project Guardrails
This guardrail is part of the Kotlin Project Guardrails policy, which includes 7 guardrails for devex build and ci.
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