[pyramation]

Summary

Replaces the placeholder matrix in both workspace templates with a literal array that pgpm init maintains (constructive-io/constructive#1845), instead of the CI-time pgpm ls discovery from #53 (reverted in #55). The matrix stays a plain YAML list you can hand-edit.

       matrix:
-        package:
-          - your-module-1
-          - your-module-2
+        # Workspace-relative paths of the packages to test. `pgpm init` adds each
+        # new module here, keeping the list sorted; edit it by hand as you like.
+        package: []
 ...
-        run: cd ./packages/${{ matrix.package }} && pnpm test
+        run: cd ./${{ matrix.package }} && pnpm test

Entries are workspace-relative paths (packages/my-module), so modules outside packages/ work too — each pgpm init inserts packages/<name> sorted, in place, preserving the comment.

Caveat (noted in the file): GitHub rejects an empty literal matrix, so a workspace with zero modules has an invalid ci.yml until its first pgpm init. pgpm init -w (workspace + module) yields a valid workflow immediately. Requires a pgpm release containing constructive#1845 for the auto-fill; older pgpm leaves the array for you to edit by hand.

Scope is the matrix only; the other cleanups from #53 (PGPM_VERSION pin, README path, lint/lint:fix, git add -A, smoke workflow, pnpm-policy packages:) are not re-landed here.

Link to Devin session: https://app.devin.ai/sessions/dd4055c50bcf4b1e8e604211038aaa82
Open in Devin Desktop: https://app.devin.ai/desktop/session/dd4055c50bcf4b1e8e604211038aaa82?variant=devin
Requested by: @pyramation

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[tenki-reviewer]

Review complete. 🟠 1 high

📍 Findings outside the diff (1) — 🟠 1 high — defects on lines GitHub can't attach comments to

🟠 High — Empty matrix silently skips the test job

The test job's package: [] matrix has zero combinations, and GitHub Actions skips a job with an empty matrix rather than rejecting it, so the job executes no steps and the run still finishes green (pnpm/workspace/.github/workflows/ci.yml:21). The comment above it ("GitHub rejects an empty matrix") is therefore wrong, and every push/PR currently reports success with no tests or supply-chain policy check run; the same empty matrix exists in pgpm/workspace/.github/workflows/ci.yml:22.

---

This PR introduces CI test workflows for both the pgpm and pnpm workspaces, discovering packages and running tests via a GitHub Actions matrix job. Both workflows are essentially parallel additions that share the same matrix-driving structure.

Files	Change
pgpm/workspace/.github/workflows/ci.yml	Adds a test job that builds a package matrix and runs each package's tests in a per-package working directory.
pnpm/workspace/.github/workflows/ci.yml	Mirrors the same matrix-based test workflow for the pnpm workspace.

The workflow relies on a dynamic matrix built at runtime; if package discovery yields an empty set, the matrix job silently runs with no entries and the workflow passes with false-green signal. This is the highest-risk aspect of the change.

_{Reviewed commit: ccc1329}