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## Summary Migrates CI workflows from `pnpm/action-setup` + manual `pn runtime set node …` + `pn install` to the new combined `pnpm/setup` action (see https://github.com/pnpm/setup/pull/1). `pnpm/setup` installs pnpm and the JS runtime in one step. It also runs `pnpm install` automatically when a `package.json` is present, so per-workflow install steps are dropped. When the `runtime` input is set, the action passes `--no-runtime` to `pnpm install` so the matrix-selected Node version isn't shadowed by a different `devEngines.runtime` pin. ## What changed | Workflow | Migration | |---|---| | `test.yml` | `pnpm/setup` with `runtime: node@${{ inputs.node }}`. Verify-Node step asserts the matrix version stayed active. Verify-npm step retained as canary (npm comes from the runner image, not the pnpm-installed runtime). | | `ci.yml` | `pnpm/setup` (no `runtime` input — `devEngines.runtime` in package.json handles the Node pin). | | `release.yml` | `pnpm/setup` with `runtime: node@26.0.0`. | | `benchmark.yml` | `pnpm/setup` with `runtime: node@26.0.0`. | | `audit.yml` | `pnpm/setup` with `install: false` — audit only needs pnpm itself, not `node_modules`. | | `update-lockfile.yml` | `pnpm/setup` with `install: false` — the job deletes `pnpm-lock.yaml` and regenerates it via `--lockfile-only`, so the action's auto-install would be wasted. | | `update-latest.yml` | Untouched — it only uses npm, no pnpm setup needed. | ## Caveats / things to watch - **npm availability.** `pnpm runtime set node` does not extract npm. The runner image's pre-installed Node toolchain provides `npm` on PATH; if a future runner image change removes that, dlx-style git-hosted dependency tests in `test.yml` will fail. The `Verify npm` step in `test.yml` is the canary. ## Related upstream change - [pnpm/setup#3](https://github.com/pnpm/setup/pull/3) — added the `install` input so callers like `audit.yml` and `update-lockfile.yml` can opt out of the action's auto-install.