diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4b85bab53..aeba2eaf8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -126,21 +126,9 @@ jobs:
           FALLOW_BASE: ${{ github.event_name == 'pull_request' && github.event.pull_request.base.sha || github.event.before }}
         run: pnpm check:fallow --base "$FALLOW_BASE"
 
-  unit:
-    name: Unit Tests
-    runs-on: ubuntu-latest
-    timeout-minutes: 20
-    steps:
-      - name: Checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-
-      - name: Setup toolchain
-        uses: ./.github/actions/setup-node-pnpm
-
-      - name: Run unit tests
-        run: pnpm test:unit
-
   coverage:
+    # Runs the full unit + provider-integration suites under coverage with
+    # thresholds, so a separate unit-tests job would rerun the same tests.
     name: Coverage
     runs-on: ubuntu-latest
     timeout-minutes: 30
diff --git a/.github/workflows/size.yml b/.github/workflows/size.yml
index aa12dfae8..ab8054a02 100644
--- a/.github/workflows/size.yml
+++ b/.github/workflows/size.yml
@@ -2,6 +2,14 @@ name: Size
 
 on:
   pull_request:
+    paths-ignore:
+      - "docs/**"
+      - "website/**"
+      - "README.md"
+      - ".github/actions/build-docs/action.yml"
+      - ".github/workflows/deploy.yml"
+      - ".github/workflows/pr-preview.yml"
+      - ".github/workflows/pr-preview-cleanup.yml"
 
 permissions:
   contents: read
@@ -29,15 +37,35 @@ jobs:
       - name: Preserve report script
         run: cp scripts/size-report.mjs /tmp/agent-device-size-report.mjs
 
+      # dist is fully determined by the base commit, so reuse it across PR runs
+      # against the same base. Startup medians are still measured fresh on this
+      # runner so the base/PR comparison stays same-machine.
+      - name: Restore base dist cache
+        id: base-dist-cache
+        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.2.3
+        with:
+          path: dist
+          key: size-base-dist-${{ github.event.pull_request.base.sha }}
+
       - name: Measure base size
         run: |
           git checkout --detach "${{ github.event.pull_request.base.sha }}"
           pnpm install --frozen-lockfile
-          pnpm build
+          if [ "${{ steps.base-dist-cache.outputs.cache-hit }}" != "true" ]; then
+            pnpm build
+          fi
           node /tmp/agent-device-size-report.mjs \
             --startup-runs 7 \
             --json /tmp/agent-device-size-base.json
 
+      # Save immediately: the job-end dist belongs to the PR head, not the base.
+      - name: Save base dist cache
+        if: steps.base-dist-cache.outputs.cache-hit != 'true'
+        uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.2.3
+        with:
+          path: dist
+          key: size-base-dist-${{ github.event.pull_request.base.sha }}
+
       - name: Measure PR size
         run: |
           git checkout --detach "${{ github.event.pull_request.head.sha }}"
diff --git a/package.json b/package.json
index a3c58ff46..13f1dc925 100644
--- a/package.json
+++ b/package.json
@@ -117,7 +117,8 @@
     "check:unit": "pnpm test:unit && pnpm test:smoke",
     "check": "pnpm check:tooling && pnpm check:fallow && pnpm check:unit",
     "prepack": "pnpm check:mcp-metadata && pnpm build:all && pnpm package:android-snapshot-helper:npm && pnpm package:android-multitouch-helper:npm",
-    "typecheck": "tsc -p tsconfig.json",
+    "typecheck": "tsgo -p tsconfig.json",
+    "typecheck:tsc": "tsc -p tsconfig.json",
     "test-app:install": "pnpm install --dir examples/test-app --ignore-workspace",
     "test-app:start": "pnpm --dir examples/test-app start",
     "test-app:ios": "pnpm --dir examples/test-app ios",