[nikku]

Proposed Changes

Patch for 12.x: restore node@20 support, reverting the Node 24 requirement introduced in 12.0.0. Continue with 12.x and retain the existing exports declaration.

Require @bpmn-io/lint-core@^0.1.1, which supports Node 20 following bpmn-io/lint-core#2. Add Node 20 CI coverage, keep Node 24 as the standard runtime, and retain Node 26 and platform coverage. The changelog records the compatibility fix and dependency update.

The full suite passes on Node 20.20 and Node 24, and an engine-strict production install of the packed package succeeds on Node 20.20. The existing lockfile's bpmn-moddle@10.1.0 requires Node >=20.12; several development dependencies require newer Node versions, so this does not promise engine-strict development installs on Node 20 or support for every Node 20 minor.

To try it out, use Node 20 or Node 24 and run npm ci && npm run all. No linked issue or UI changes apply.

Checklist

Ensure you provide everything we need to review your contribution:

• Contribution meets our definition of done
• Pull request establishes context
  • Link to related issue(s), i.e. Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}
  • Brief textual description of the changes
  • Screenshots or short videos showing UI/UX changes
  • Steps to try out, i.e. using the @bpmn-io/sr tool

[Copilot]

🟡 Changes recommended

The declared Node support includes 20.0–20.11, but bpmn-moddle@10.1.0 requires Node >=20.12, causing engine-strict installs to fail within the advertised range.

1 open issue

• Raise the Node minimum to match bpmn-moddle’s engine requirement · New

What changed in this PR

This PR restores declared Node 20 support and CI coverage for bpmnlint while keeping Node 24 as the standard runtime.

Changes:

• Lowers the declared Node engine minimum from 24 to 20.
• Updates @bpmn-io/lint-core to the Node 20-compatible ^0.1.1 release.
• Adds Node 20 checks alongside existing Node 24 and Node 26 coverage.

File	Description
package.json	Updates the Node engine range and lint-core dependency requirement.
package-lock.json	Synchronizes engine metadata and locks lint-core to version 0.1.1.
.github/​workflows/​CI.yml	Adds Node 20 to the compatibility test matrix.

_{Review effort: Balanced}