chore: update pnpm to 12.11.2

[github-actions]

Summary

Updates the pinned pnpm version via Corepack.

• Old version: pnpm@12.9.1
• New version: pnpm@12.11.2

The new version comes from the stable latest npm distribution tag (verified via corepack use pnpm@latest, which resolved to 12.11.2; no prerelease versions were selected).

corepack use pnpm@12.11.2 regenerated package.json's packageManager field with Corepack's canonical version string and integrity hash, and updated pnpm-lock.yaml accordingly (bumping the @pnpm/exe.* platform package entries and the pnpm package entry to 12.11.2 with matching integrity hashes). No dependency versions were changed.

Validation

Command	Result
pnpm install --frozen-lockfile	✅ Passed
pnpm run build	❌ Failed — 005-agent-enables-theme-switching#build exited with code 137 (OOM kill) during parallel Turbo execution. All other 10 build tasks (including @primer/agent-eval, @primer/agent-eval-website, and other scenario packages) completed successfully. This appears to be a sandbox memory/resource constraint from running many Next.js builds in parallel, not a regression from the pnpm bump — memory was available again immediately afterward.
pnpm run format:diff	✅ Passed (no formatting differences)
pnpm exec turbo run lint	✅ Passed
pnpm exec turbo run lint:npm	✅ Passed
pnpm test --run	✅ Passed (56 test files, 634 tests)
pnpm exec turbo run type-check	✅ Passed (15 packages)

Notes

• Only package.json and pnpm-lock.yaml were modified; no package dependencies were updated.
• The sandbox's npm registry access required routing through the environment's configured HTTP(S) proxy for Corepack/pnpm downloads to succeed.

Generated by update-pnpm · copilot · auto · 266.4 AIC · ⌖ 2.55 AIC · ⊞ 8.4K · ◷

[Copilot]

🟢 Approval recommended

The version and integrity hashes are consistent, and the reported build failure is isolated to resource exhaustion.

0 open findings

What changed in this PR

Updates the repository’s Corepack-managed pnpm version from 12.9.1 to 12.11.2.

Changes:

• Updates the canonical pnpm version and integrity hash.
• Regenerates matching pnpm lockfile entries.

File	Description
package.json	Pins pnpm 12.11.2.
pnpm-lock.yaml	Updates pnpm and platform executable entries.

Files not reviewed (1)

• pnpm-lock.yaml: Generated file

🧠 Review effort: Balanced

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