ci: lint and type-check the examples

.github/workflows/examples.yml

@@ -0,0 +1,69 @@
+name: Examples
+
+# Same paths as e2e.yml: the examples, the library they pack, and the tooling that installs both.
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "examples/**"
+      - "package/**"
+      - ".github/workflows/examples.yml"
+      - "pnpm-lock.yaml"
+      - "pnpm-workspace.yaml"
+      - "mise.toml"
+      - "mise.lock"
+  pull_request:
+    types: [opened, synchronize, reopened]
+    branches:
+      - main
+    paths:
+      - "examples/**"
+      - "package/**"
+      - ".github/workflows/examples.yml"
+      - "pnpm-lock.yaml"
+      - "pnpm-workspace.yaml"
+      - "mise.toml"
+      - "mise.lock"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions: {}
+
+jobs:
+  check:
+    name: Check examples
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    timeout-minutes: 10
+    env:
+      MISE_EXPERIMENTAL: "1"
+    steps:
+      - name: ⬇️ Checkout repo
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - name: 🛠️ Setup mise
+        uses: jdx/mise-action@c2a87611a18de5b3828c5652fe268e992400cb5c # v4.3.0
+        with:
+          install: true
+          cache: true
+          experimental: true
+
+      # `mise install` takes no monorepo glob, so each example's own runtime (bun, deno) installs here.
+      - name: 🧰 Install example tools
+        run: for d in examples/*/; do mise install --locked -C "$d"; done
+
+      - name: 📦 Install root dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: 🎁 Pack @variablelab/env
+        run: mise run env:pack
+
+      - name: 💅 Lint and typecheck examples
+        timeout-minutes: 5
+        run: mise run examples:check

docs/contributing.md

@@ -42,6 +42,7 @@ The pull request title takes the same form, because it becomes the squash-merge
 - [ ] The pull request title follows Conventional Commits.
 - [ ] Tests cover the change: unit tests in `package/src/__tests__/`, and e2e tests in `examples/<name>/test/e2e/` when relevant.
 - [ ] `mise run lib:test` and `mise run check` pass locally.
+- [ ] `mise run examples:check` passes locally, when the change touches `examples/` or `package/`.
 - [ ] `mise run test:e2e` passes locally, at least for the examples the change touches.
 - [ ] A changeset is added, if the published `@variablelab/env` changed. See [Changesets](#changesets).
 - [ ] The docs are updated, if public API or behavior changed.

docs/development.md

@@ -117,9 +117,10 @@ On every pull request to `main`:
 
 - **CI** ([`ci.yml`](../.github/workflows/ci.yml)): the library and docs pipeline, inside the pnpm workspace (`package` + `docsite`). It runs `mise run check`, `mise run lib:test` and `mise run lib:build`. On `main`, it also runs the Changesets release job, and for a `feat/*` or `fix/*` branch, or a pull request with the `preview` label, it publishes a [preview release](contributing.md#preview-releases).
 - **E2E** ([`e2e.yml`](../.github/workflows/e2e.yml)): a matrix job per example, when the pull request touches `examples/`, `package/`, the workflow itself, the pnpm lockfile or workspace, or the root mise files. Each job sets up its own runtime with `jdx/mise-action` v4.3.0 (with `working_directory: examples/<name>`), packs the library with `mise run env:pack`, and runs `mise run //examples/<name>:test:e2e`.
+- **Examples** ([`examples.yml`](../.github/workflows/examples.yml)): one job, on the same paths as E2E, that installs each example's tools, packs the library and runs `mise run examples:check`.
 - **Workflow audit** ([`workflow-audit.yml`](../.github/workflows/workflow-audit.yml)): zizmor on the workflows in `.github/`.
 
-CI and E2E use the experimental mise monorepo feature (`MISE_EXPERIMENTAL=1`).
+CI, E2E and Examples use the experimental mise monorepo feature (`MISE_EXPERIMENTAL=1`).
 
 Outside pull requests:
 
@@ -303,4 +304,4 @@ mise run examples:bump
 
 ### CI passes but local fails (or the reverse)
 
-Make sure your local mise is current (`mise self-update`), and that you ran `mise install` from the root and from the example. CI uses `jdx/mise-action` v4.3.0 with `working_directory: examples/<name>` to provision both layers.
+Make sure your local mise is current (`mise self-update`), and that you ran `mise install` from the root and from the example. E2E uses `jdx/mise-action` v4.3.0 with `working_directory: examples/<name>` to provision both layers. Examples runs it from the root, then `mise install --locked` in each example.