chore: bump pnpm to 12.4.1

[btravers]

Bumps packageManager from pnpm 11.7.0 to 12.4.1 (major).

• Lockfile regenerated with pnpm install --lockfile-only: the only change is pnpm 12's new packageManagerDependencies document pinning pnpm's own integrity. Dependency graph unchanged.
• pnpm 12 breaking changes to watch in CI: unrecognized pnpm-workspace.yaml settings now error, --frozen-lockfile false removed (use --no-frozen-lockfile), stricter engineStrict.

https://claude.ai/code/session_01JqjTCSDPsbgreJKHcRABi9

Summary by CodeRabbit

• Documentation

  • Updated development setup instructions to require pnpm 12.4.1.

• Chores

  • Updated the project’s required package manager version to pnpm 12.4.1.

[coderabbitai]

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Review profile: CHILL

Plan: Advanced

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📥 Commits

Reviewing files that changed from the base of the PR and between f68d4a3 and 278417c.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml, !pnpm-lock.yaml

📒 Files selected for processing (2)

• CONTRIBUTING.md
• pnpm-workspace.yaml

No actionable comments were generated in the recent review. 🎉

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Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Advanced

Run ID: 769dfed7-7913-4e50-a3f0-065b46f03757

📥 Commits

Reviewing files that changed from the base of the PR and between 31f1d53 and f68d4a3.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml, !pnpm-lock.yaml

📒 Files selected for processing (2)

• CONTRIBUTING.md
• package.json

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📝 Walkthrough

Walkthrough

The package manager requirement changes from pnpm 11.7.0 to 12.4.1. The contributing guide documents the same pnpm version.

Changes

pnpm Version Alignment

Layer / File(s)	Summary
Update package manager requirement and documentation package.json, CONTRIBUTING.md	The required pnpm version changes to 12.4.1 in package metadata and development setup instructions.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Suggested reviewers: copilot

Merge Risk: ⚪ Minimal · up to f68d4

The pnpm upgrade remains compatible with the repository’s documented setup and CI installation path, with no confirmed merge-blocking risk.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: updating pnpm to version 12.4.1.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/pnpm-12.4.1

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[Copilot]

🟡 Changes recommended

pnpm-lock.yaml appears to contain two YAML documents (duplicated lockfile), which will likely break pnpm installs/CI until regenerated into a single valid lockfile.

Get a fresh assessment by requesting another Copilot review.

Pull request overview

This PR upgrades the repository’s pinned package manager to pnpm 12.4.1 (via packageManager) and updates contributor documentation accordingly, alongside an intended lockfile regeneration.

Changes:

• Bumped packageManager in package.json from pnpm 11.7.0 to 12.4.1.
• Updated CONTRIBUTING.md to reflect pnpm 12.4.1 in developer prerequisites.
• Regenerated pnpm-lock.yaml, intending to include pnpm 12’s packageManagerDependencies metadata (but the current lockfile content appears to be malformed / duplicated).

File summaries

File	Description
pnpm-lock.yaml	Regenerated lockfile content; currently appears to include two YAML documents (likely breaking installs).
package.json	Updates the pinned packageManager version to pnpm 12.4.1.
CONTRIBUTING.md	Updates contributor prerequisites to reference pnpm 12.4.1 (and should align Node minimum with engines).

Review details

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

Suppressed comments (1)

pnpm-lock.yaml:162

• pnpm-lock.yaml appears to contain two YAML documents (a standalone pnpm 12 packageManagerDependencies doc, then a second full lockfile starting at the second ---). pnpm’s lockfile reader expects a single document; this will likely cause installs to read only the first doc and ignore the real dependency graph.

• Files reviewed: 2/3 changed files
• Comments generated: 1
• Review effort level: Lite

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