[Kikobeats]

Adds .github/workflows/engines.yml, which checks that every published package installs and loads on the lowest Node.js version its engines.node allows. A dependency bump or new syntax that raises the real floor now turns CI red instead of breaking users on that version.

What it does

1. Pack (Node LTS). pnpm install, then for each non-private workspace package (the root package in a single-package repo): run prepublishOnly if present, and pnpm pack it. The floor is read from that package's engines.node at run time. Nothing is hardcoded in the workflow. A range that is not >= x fails the job.
2. Floor (one matrix job per package, on that floor). In an empty directory, npm install --engine-strict of the package tarball, plus the tarballs of the workspace packages it depends on. This is what a user does: production dependencies only, lifecycle scripts included. Any package in the tree whose engines excludes the floor fails the install with EBADENGINE. Without --engine-strict, npm only warns.
3. Load. require every runtime entry in exports (or main when there is no exports). Entries that are import-only fall back to import(). Type-only entries and * patterns are skipped.

It runs as its own workflow on pull_request and on push to the default branch, so the release logic in main.yml is untouched.

Why npm on the floor side

pnpm needs Node 18 or later, so it cannot run on older floors, and npm ships with every Node.js version. The install happens in a fresh directory from tarballs, so devDependencies never enter the tree and the test toolchain (ava, c8, standard), which needs a newer Node, is not involved.

Limits

• setup-node resolves a major-only floor such as >= 20 to the latest 20.x. The job cannot tell 20.0 from 20.12. A floor written with a minor, such as >= 20.19, is checked at the latest 20.19.x.
• Loading an entry point runs its top-level code only. A dependency required lazily inside a function is covered by the engines check, not by the load.
• bin scripts are not executed.
• For a caret or tilde range, npm installs the newest version whose engines accept the running Node. A user on the floor can get an older dependency than a user on current Node, and the job checks the tree the floor user gets. It goes red only when no version in range supports the floor, which is the case that breaks users.

Proof that it catches a violation

On microlinkhq/keyvhq#294, @keyvhq/redis declares >= 20 and depends on ioredis@6, which requires >=20.0.0. A throwaway commit lowered @keyvhq/redis to >= 18:

• Run with >= 18: Node 18 @keyvhq/redis fails, the other 15 packages pass.

  npm error code EBADENGINE
  npm error notsup Not compatible with your version of node/npm: ioredis@6.0.0
  npm error notsup Required: {"node":">=20.0.0"}
  npm error notsup Actual:   {"npm":"10.8.2","node":"v18.20.8"}
  

• Run with the real >= 20, after dropping that commit: all 16 jobs pass.

🤖 Generated with Claude Code

---

Note

Low Risk
Adds a standalone GitHub Actions workflow and inline scripts; no application runtime, auth, or production deploy paths are modified.

Overview
Adds a new engines GitHub Actions workflow (PRs and pushes to master) that verifies each published workspace package really works on the Node version declared in engines.node.

The Pack job uses pnpm on Node LTS to install, run prepublishOnly when present, pnpm pack every non-private package, and build a matrix from each package’s >= x floor (other range shapes fail). Workspace workspace: deps are resolved into tarball sets for install.

Floor matrix jobs switch to that floor’s Node, npm install --engine-strict the relevant tarballs in a clean consumer project (npm is used because pnpm can’t run on older floors), then smoke-load every runtime exports entry via require, with import() fallback for ESM-only paths.

This is CI-only and does not change release workflows in main.yml.

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• .github/workflows/engines.yml

Walkthrough

This pull request adds a GitHub Actions workflow that packs eligible workspace packages and tests their exports at each package’s declared Node.js engine floor.

Changes: Engine floor verification

Layer / File(s)	Summary
Discover and pack workspace packages .github/workflows/engines.yml	The workflow selects non-private packages with supported Node.js engine floors, runs prepublishOnly when present, packs packages, and builds a matrix that includes transitive workspace dependencies.
Install packages at the declared Node.js floor .github/workflows/engines.yml	Each matrix job downloads the tarballs and installs a package’s dependency closure with npm engine-strict enabled at its declared Node.js floor.
Discover and load package exports .github/workflows/engines.yml	The smoke test loads eligible export specifiers with require, with dynamic import fallback for specified error codes. Failed loads and undefined results fail the job.

Priority: Pending latest changes

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Other

Sequence Diagram(s)

sequenceDiagram
  participant GitHubActions
  participant PackageManifests
  participant npm
  participant TarballArtifact
  participant NodeRuntime
  GitHubActions->>PackageManifests: Read package metadata and exports
  GitHubActions->>npm: Run prepublishOnly and pack packages
  GitHubActions->>TarballArtifact: Upload generated tarballs
  GitHubActions->>npm: Install dependency closure with engine-strict at Node floor
  GitHubActions->>NodeRuntime: Load discovered export specifiers
  NodeRuntime-->>GitHubActions: Return load results

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Possibly related PRs

• Kikobeats/html-scripts#22: Changes the engines.node value consumed by this workflow’s floor checks.

Merge Risk: Low · previous review 56630

The engine check can miss incompatibilities with Node 20.19.0. Correcting the selected version would make the floor check reliable.

Pre-merge checks: 4

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: adding CI coverage for packages on their minimum supported Node.js version.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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[github-actions]

html-scripts

Details

Benchmark suite	Current: 8a6dd7a	Previous: 117a9c5	Ratio
getScripts 1MB page	94.8 ms (93.3-101.9)	96 ms (94.2-107)	0.99
getScripts 20KB page	127.8 ms (126.2-132.7)	126.9 ms (124.5-134.3)	1.01

This comment was automatically generated by workflow using github-action-benchmark.

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Actionable comments posted: 1

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• 🪄 Fix comments: Fix CodeRabbit comments on this PR

Prompt to fix review comments

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Inline comments:
Review comments at @.github/workflows/engines.yml:
- Around line 119-128: Update floorOf to append .0 to two-component version
floors such as 20.19, so setup-node tests the exact patch floor; preserve
major-only floors unchanged.

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• .github/workflows/engines.yml

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Optional workspace tarballs become required

Low Severity

Workspace packages listed in optionalDependencies are packed into the closure and passed to npm install --engine-strict as top-level arguments, so they are required. An optional workspace package whose engines exclude the floor fails the install, while a real install of the parent would skip it.

Additional Locations (2)

• .github/workflows/engines.yml#L94-L100
• .github/workflows/engines.yml#L165-L167

 

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[Kikobeats]

Closing: not pursuing the floor CI job.