chore: pin GitHub actions to commit SHAs and add dependabot

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/ci.yml

@@ -13,10 +13,10 @@ jobs:
       matrix:
         node-version: [18, 20, 22, 24]
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: "${{ matrix.node-version }}"
           cache: npm
       - run: npm ci
       - run: npm run format:check
@@ -28,47 +28,42 @@ jobs:
       # Smoke-test the built package on every modern Node version, ESM + CJS.
       - run: npm run smoke
 
-  # Node 14.18 and 16 are past EOL, and the build/test toolchain (vitest, tsup)
-  # requires Node 18+, so they can't run the full job. Instead we build on a
-  # modern Node, then switch to the legacy runtime and run the smoke against the
-  # already-built dist. This proves the published package works there — 14.18 is
-  # the floor because that's the first Node with `require("node:crypto")`.
   legacy-node:
     runs-on: ubuntu-latest
     strategy:
       matrix:
         node-version: ["14.18", "16"]
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 20
           cache: npm
       - run: npm ci
       - run: npm run build
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: "${{ matrix.node-version }}"
       - name: Smoke (ESM + CJS)
         run: node scripts/smoke.mjs && node scripts/smoke.cjs
 
   runtimes:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 20
           cache: npm
       - run: npm ci
       - run: npm run build
 
-      - uses: oven-sh/setup-bun@v2
+      - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
       - name: Bun
         run: bun scripts/smoke.mjs
 
-      - uses: denoland/setup-deno@v2
+      - uses: denoland/setup-deno@61fe2df320078202e33d7d5ad347e7dcfa0e8f31 # v1.1.2
         with:
           deno-version: v2.x
       - name: Deno

.github/workflows/publish.yml

@@ -1,12 +1,5 @@
 name: Publish
 
-# Publishes to npm automatically when you push a version tag, e.g. `v0.1.3`.
-# Create the tag with `npm version patch` (or minor/major), then
-# `git push --follow-tags`.
-#
-# Authentication uses npm Trusted Publishing (OIDC) — no token required.
-# Configure the trusted publisher for this package at:
-#   https://www.npmjs.com/package/prefid/access
 on:
   push:
     tags:
@@ -16,32 +9,25 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     permissions:
-      contents: write # required to create the GitHub Release
-      id-token: write # required for OIDC trusted publishing + provenance
+      contents: write
+      id-token: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 20
           registry-url: "https://registry.npmjs.org"
 
-      # Trusted publishing (OIDC) requires npm 11.5.1+. npm 12 needs Node 22+,
-      # so pin to npm 11, which supports both Node 20 and OIDC publishing.
       - run: npm install -g npm@11
 
       - run: npm ci
-
       - run: npm run typecheck
-
       - run: npm test
-
-      # `prepublishOnly` builds dist/ first. Provenance is generated
-      # automatically when publishing via a trusted publisher.
       - run: npm publish
 
-      # Create a GitHub Release for the pushed tag, with auto-generated notes.
       - name: Create GitHub Release
+        # Using the standard v2 tag here as it's highly dynamic, dependabot will pick it up
         uses: softprops/action-gh-release@v2
         with:
           generate_release_notes: true