pnpm Upgrade

Use these steps to update pnpm and CI pins without blunt search/replace.

Steps (run from repo root)

1. Resolve the target pnpm release

   • Query the npm registry before changing the local toolchain: PNPM_VERSION=$(curl -fsSL https://registry.npmjs.org/pnpm/latest | jq -r .version).
   • Abort if the version is missing.
   • Resolve the exact package integrity: curl -fsSL "https://registry.npmjs.org/pnpm/${PNPM_VERSION}" | jq -r .dist.integrity.
   • Store the result as PNPM_INTEGRITY.
   • Abort if the integrity is missing or does not start with sha512-.
   • Convert the base64 digest after sha512- to lowercase hex, for example:

     printf '%s' "${PNPM_INTEGRITY#sha512-}" | base64 -d | xxd -p -c 256
     

     Copy
   • Store the result as PNPM_SHA512_HEX.

2. Find the target pnpm/action-setup release

   • Query GitHub API: curl -fsSL https://api.github.com/repos/pnpm/action-setup/releases/latest | jq -r .tag_name.
   • Use GITHUB_TOKEN/GH_TOKEN if available for higher rate limits.
   • Store as ACTION_TAG (e.g., v4.2.0). Abort if missing.

3. Resolve the action tag to an immutable commit SHA

   • Run git ls-remote https://github.com/pnpm/action-setup "refs/tags/${ACTION_TAG}^{}" and capture the SHA as ACTION_SHA.
   • If the dereferenced tag is missing, fall back to git ls-remote https://github.com/pnpm/action-setup "refs/tags/${ACTION_TAG}".
   • Abort if ACTION_SHA is empty.

4. Preflight the release and CI installation path

   • Run node .agents/skills/pnpm-upgrade/scripts/preflight.mjs --version "${PNPM_VERSION}" --action-ref "${ACTION_SHA}".
   • The script first rejects published pnpm manifests with non-empty dependencies or devDependencies. pnpm bundles its runtime dependencies, so these fields indicate a broken publication such as pnpm@11.12.0.
   • It then reproduces both pnpm/action-setup installation paths in separate temporary directories: install the regular pnpm bootstrap from pnpm-lock.json and the standalone @pnpm/exe bootstrap from exe-lock.json, set isolated PNPM_HOME directories, and self-update each bootstrap to PNPM_VERSION.
   • Abort the upgrade on any failure. Do not bypass this check with a direct local install; the preflight exists to exercise the CI-only bootstrap path.

5. Update pnpm locally

   • Run pnpm self-update "${PNPM_VERSION}".
   • If pnpm is missing or self-update fails only because the current installation cannot update itself, run corepack prepare "pnpm@${PNPM_VERSION}" --activate. Do not use this fallback to bypass a failed preflight.
   • Confirm pnpm -v exactly matches PNPM_VERSION.

6. Align package.json

   • Open package.json and set packageManager to pnpm@${PNPM_VERSION}+sha512.${PNPM_SHA512_HEX} (preserve trailing newline and formatting).

7. Update workflows carefully (no broad regex)

   • Files: everything under .github/workflows/ that uses pnpm/action-setup.
   • For each file, edit by hand:
     • Set uses: pnpm/action-setup@${ACTION_SHA}.
     • If a with: version: field exists, set it to ${PNPM_VERSION} (keep quoting style/indent).
   • Do not touch unrelated steps. Avoid multiline sed/perl one-liners.

8. Verify

   • Run pnpm -v and confirm it matches the version portion of packageManager.
   • Confirm packageManager keeps the exact +sha512.${PNPM_SHA512_HEX} suffix.
   • git diff to ensure only intended workflow/package.json changes.

9. Follow-up

   • If runtime code/build/test config was changed (not typical here), run $code-change-verification; otherwise, a light check is enough.
   • Commit with chore: upgrade pnpm toolchain and open a PR (automation may do this).

Notes

• Tools needed: curl, jq, base64, xxd, node, npm, and pnpm/corepack. Install if missing.
• Keep edits minimal and readable—prefer explicit file edits over global replacements.
• GitHub Actions must stay pinned to commit SHAs, not tags. Use the latest release tag only to discover the commit SHA to pin.
• If GitHub API is rate-limited, retry with a token or bail out rather than guessing the tag.