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Added Node 24 to the supported engines range - #30466

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claude/node-24-support
Sep 2, 2026
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Why

Ghost should run on Node 24, but nothing about what we ship has to change to get there. This declares 24 as supported and leaves 22.23.1 as the default everywhere it is one, so the production image — and Pro — keep building and running exactly as they do today.

This replaces the approach in #30434, which flipped the default to 24 outright. That turned out to be a much larger change than the goal required.

The more interesting part is the coverage gap it exposed. The unit, legacy and acceptance matrices have run on Node 24 for a while and stayed green — through a bug that stopped Ghost booting at all:

Error [ERR_REQUIRE_ESM_RACE_CONDITION]: Cannot require() ES Module .../got/dist/source/index.js
  because it is not yet fully loaded.
  (From core/server/lib/request-external.js)
  Help: Error occurred while executing the following migration: 2-create-fixtures.js

@tryghost/request started a floating import('got') at module scope while request-external.js did a synchronous require('got'). Node 22 tolerated that; Node 24 rejects it. Nothing caught it until something performed a full boot — the E2E and Ghost-CLI suites. (Already fixed upstream and picked up in #30463, so it isn't an issue on this branch.)

The lesson is that suites which stop at module level can all pass while Ghost fails to start. Boot is where runtime-only breakage shows up — a require/import race, a removed API — so boot is what needs to run on each supported line.

What

engines.node^22.23.1 || ^24.20.0 in root package.json, ghost/core, and apps/ember-admin.

The default stays 22.23.1: devEngines, .nvmrc, .node-version, CI's NODE_VERSION, and all three Dockerfiles are untouched. CI passes no --build-arg NODE_VERSION, so Dockerfile.production keeps its 22.23.1 ARG default.

Ghost-CLI clean-install runs on every supported line. It installs this build's tarball and starts it, which is the cheapest full-boot coverage available, and it needs no change to the image version:

scenario: [clean-install]
node: ${{ fromJSON(needs.job_setup.outputs.node_test_matrix) }}
include:
  - scenario: latest-release
    node: ${{ needs.job_setup.outputs.node_version }}

Three legs: clean-install on 22.23.1 and 24.20.0, latest-release on 22.23.1. The node list reuses the existing matrix output rather than adding a second literal.

Compatibility table gains a >= 6.63.0 | ^22.23.1 || ^24.20.0 | Added Node.js 24 row.

Notes for reviewers

  • latest-release deliberately stays on the default. It upgrades from the newest Ghost on npm, and that release's engines decides which Node can install it. Every published Ghost currently says ^22.23.1, so Ghost-CLI correctly refuses on 24. It can join the full list once a release ships with 24 support. Note GHOST_NODE_VERSION_CHECK=false is not a shortcut here — it skips the gate, then boot fails instead.
  • engines.cli needs no bump. The ^1.29.1 minimum is already above 1.28.6, the Ghost-CLI release that added Node 24; current 1.32.2 declares ^22.13.0 || ^24.0.0. Anyone whose CLI satisfies Ghost has one that runs on 24.
  • The renovate @types/node cap stays at <23 on purpose — it tracks the Node version we develop and build against, still 22. I updated its description, which said (engines: ^22.23.1) and would now read as wrong.
  • ^24.20.0 rather than ^24.0.0 follows the existing convention of pinning a tested floor, the same way the 22 range is ^22.23.1 rather than ^22.0.0.
  • Worth eyeballing on the first run: the three-leg expansion relies on GitHub creating a new combination when an include entry's scenario can't overwrite an existing one. That's documented behaviour and the previous version of this job already used an include leg, but the checks list should show Ghost-CLI tests (clean-install, Node 24.20.0) as its own entry.
  • No test added — this is engines metadata and CI configuration. actionlint unchanged at 140 pre-existing findings; format, markdownlint, remark link-check and lint:packages all clean.

🤖 Generated with Claude Code

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1069-1089: LGTM!

Also applies to: 1117-1117


Walkthrough

The pull request adds Node.js 24.20.0 to the supported runtime constraints for the repository, Ghost Core, and Ember Admin. The compatibility documentation records this support for Ghost 6.63.0 and later. CI now runs the Ghost CLI clean-install scenario on all configured Node versions. The latest-release scenario uses the default Node version. Job and debug-log artifact names include the Node version. The Renovate description now references devEngines.

Suggested reviewers: 9larsons, erisds

Merge Risk: 🔵 Low · up to 1930c

This PR expands Ghost-CLI clean-install coverage to Node 24 while keeping shipped defaults unchanged. The current CI changes still carry bounded reliability and consistency risks because parallel failures may lose diagnostic logs and one new step uses npm instead of pnpm. The PR is mergeable with explicit owner follow-up on those CI issues.

🚥 Pre-merge checks | ✅ 6
✅ Passed checks (6 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly summarizes the main change: adding Node 24 to the supported engine range.
Description check ✅ Passed The description directly explains the Node 24 engine updates, preserved Node 22 defaults, CI coverage changes, and compatibility documentation update.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
Type-Safe Boundaries ✅ Passed PASS — The PR changes only configuration and documentation files: .github/renovate.json5, .github/workflows/ci.yml, three package.json engine fields, and the compatibility Markdown table. The di…
New Files Are Typescript ✅ Passed PASS. The pull request adds no files. Its diff contains only modifications to two JSON files, one YAML workflow, one Markdown file, and two package manifests. The added-path and added JavaScript-like-…
Full details: Type-Safe Boundaries

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PASS — The PR changes only configuration and documentation files: .github/renovate.json5, .github/workflows/ci.yml, three package.json engine fields, and the compatibility Markdown table. The diff introduces no TypeScript/JavaScript source, boundary-data consumption, any, unchecked as, or TypeScript suppression. The check explicitly never fails for config files or scripts.

Full details: New Files Are Typescript

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PASS. The pull request adds no files. Its diff contains only modifications to two JSON files, one YAML workflow, one Markdown file, and two package manifests. The added-path and added JavaScript-like-path checks are both empty, so no new .js, .jsx, .cjs, or .mjs source file was introduced.

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Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (2)
.github/workflows/ci.yml (2)

1117-1117: 🩺 Stability & Availability | 🟡 Minor | ⚡ Quick win

Include the Node version in the debug artifact name.

When multiple clean-install matrix legs fail, actions/upload-artifact@v7 rejects their duplicate artifact names. Include ${{ matrix.node }} so each leg preserves its debug logs.

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only still-valid issues, skip the rest with a brief reason, keep changes
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In @.github/workflows/ci.yml at line 1117, Update the debug artifact name in the
clean-install matrix upload step to include matrix.node alongside
matrix.scenario, ensuring each Node-version leg produces a unique artifact name.

Source: MCP tools


1098-1098: 📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Enable pnpm before installing Ghost-CLI.

The clean-install matrix includes Node 24.20.0, so this job now reaches npm install -g ghost-cli@latest on that leg. Add the pinned pnpm/action-setup step, replace the command with pnpm add --global ghost-cli@latest, and confirm that ghost is on PATH.

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only still-valid issues, skip the rest with a brief reason, keep changes
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In @.github/workflows/ci.yml at line 1098, Update the clean-install matrix job
around the Ghost-CLI installation to add a pinned pnpm/action-setup step before
installation, replace the global npm install with pnpm add --global
ghost-cli@latest, and verify the ghost executable is available on PATH
afterward.

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Outside diff comments:
In @.github/workflows/ci.yml:
- Line 1117: Update the debug artifact name in the clean-install matrix upload
step to include matrix.node alongside matrix.scenario, ensuring each
Node-version leg produces a unique artifact name.
- Line 1098: Update the clean-install matrix job around the Ghost-CLI
installation to add a pinned pnpm/action-setup step before installation, replace
the global npm install with pnpm add --global ghost-cli@latest, and verify the
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Files:

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Prioritise concrete correctness, security, data-integrity, compatibility, and regression risks.

⚙️ CodeRabbit configuration file

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🔇 Additional comments (5)
package.json (1)

107-107: LGTM!

ghost/core/package.json (1)

317-317: LGTM!

apps/ember-admin/package.json (1)

28-28: LGTM!

docs/reference/node-compatibility.md (1)

59-59: LGTM!

.github/renovate.json5 (1)

286-286: LGTM!

no ref

Ghost should run on Node 24, but nothing about shipping on it has to change to
get there. This declares 24 as supported and leaves 22.23.1 as the default
everywhere it is one: devEngines, .nvmrc, .node-version, CI's NODE_VERSION and
all three Dockerfiles. Pro keeps building and running the same image.

The unit, legacy and acceptance matrices have run on 24 for a while and stayed
green through a bug that stopped Ghost booting at all — an ESM/CJS require race
on `got` that only fired during init migrations. Those suites stop at module
level, so full boot is the coverage that was missing. Ghost-CLI's clean-install
scenario is the cheapest place to get it: it installs this build's tarball and
starts it, so it now runs on every Node line `engines` claims, off the same
list the other matrices use.

The latest-release scenario stays on the default. It upgrades from the newest
Ghost on npm, and that release's own `engines` decides which Node versions can
install it — it can join the full list once a published release supports 24.

The debug-log artifact name carries the Node version as well as the scenario,
since the clean-install legs would otherwise collide on upload.

engines.cli is unchanged: the ^1.29.1 minimum is already above the Ghost-CLI
release that added Node 24 support. The renovate @types/node cap also stays at
<23, since it tracks the Node version we develop and build against, which is
still 22.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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codecov Bot commented Sep 2, 2026

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.46%. Comparing base (564a78a) to head (1930c0a).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files
@@           Coverage Diff           @@
##             main   #30466   +/-   ##
=======================================
  Coverage   67.46%   67.46%           
=======================================
  Files        1656     1656           
  Lines       59993    59993           
  Branches    10379    10379           
=======================================
+ Hits        40473    40474    +1     
+ Misses      17232    17231    -1     
  Partials     2288     2288           
Flag Coverage Δ
e2e-tests 70.24% <ø> (+<0.01%) ⬆️

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@acburdine
acburdine merged commit 8fb4f43 into main Sep 2, 2026
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@acburdine
acburdine deleted the claude/node-24-support branch September 2, 2026 16:21
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