diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 986af7101..6a100b971 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -99,7 +99,8 @@ jobs:
         run: |
           git checkout -b "$BRANCH"
           npm version "$VERSION" --no-git-tag-version
-          git add package.json package-lock.json
+          cd sdk && npm version "$VERSION" --no-git-tag-version && cd ..
+          git add package.json package-lock.json sdk/package.json
           git commit -m "chore: bump version to ${VERSION} for release"
           git push origin "$BRANCH"
           echo "## Release branch created" >> "$GITHUB_STEP_SUMMARY"
@@ -174,6 +175,7 @@ jobs:
           PRE_VERSION: ${{ steps.prerelease.outputs.pre_version }}
         run: |
           npm version "$PRE_VERSION" --no-git-tag-version
+          cd sdk && npm version "$PRE_VERSION" --no-git-tag-version && cd ..
 
       - name: Install and test
         run: |
@@ -184,11 +186,16 @@ jobs:
         env:
           PRE_VERSION: ${{ steps.prerelease.outputs.pre_version }}
         run: |
-          git add package.json package-lock.json
+          git add package.json package-lock.json sdk/package.json
           git commit -m "chore: bump to ${PRE_VERSION}"
 
+      - name: Build SDK
+        run: cd sdk && npm ci && npm run build
+
       - name: Dry-run publish validation
-        run: npm publish --dry-run --tag next
+        run: |
+          npm publish --dry-run --tag next
+          cd sdk && npm publish --dry-run --tag next
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
 
@@ -217,6 +224,12 @@ jobs:
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
 
+      - name: Publish SDK to npm (next)
+        if: ${{ !inputs.dry_run }}
+        run: cd sdk && npm publish --provenance --access public --tag next
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
       - name: Create GitHub pre-release
         if: ${{ !inputs.dry_run }}
         env:
@@ -240,6 +253,12 @@ jobs:
             exit 1
           fi
           echo "✓ Verified: get-shit-done-cc@$PRE_VERSION is live on npm"
+          SDK_PUBLISHED=$(npm view @gsd-build/sdk@"$PRE_VERSION" version 2>/dev/null || echo "NOT_FOUND")
+          if [ "$SDK_PUBLISHED" != "$PRE_VERSION" ]; then
+            echo "::error::SDK version verification failed. Expected $PRE_VERSION, got $SDK_PUBLISHED"
+            exit 1
+          fi
+          echo "✓ Verified: @gsd-build/sdk@$PRE_VERSION is live on npm"
           # Also verify dist-tag
           NEXT_TAG=$(npm dist-tag ls get-shit-done-cc 2>/dev/null | grep "next:" | awk '{print $2}')
           echo "✓ next tag points to: $NEXT_TAG"
@@ -254,6 +273,7 @@ jobs:
             echo "**DRY RUN** — npm publish, tagging, and push skipped" >> "$GITHUB_STEP_SUMMARY"
           else
             echo "- Published to npm as \`next\`" >> "$GITHUB_STEP_SUMMARY"
+            echo "- SDK also published: \`@gsd-build/sdk@${PRE_VERSION}\` on \`next\`" >> "$GITHUB_STEP_SUMMARY"
             echo "- Install: \`npx get-shit-done-cc@next\`" >> "$GITHUB_STEP_SUMMARY"
           fi
           echo "" >> "$GITHUB_STEP_SUMMARY"
@@ -301,7 +321,8 @@ jobs:
           VERSION: ${{ inputs.version }}
         run: |
           npm version "$VERSION" --no-git-tag-version --allow-same-version
-          git add package.json package-lock.json
+          cd sdk && npm version "$VERSION" --no-git-tag-version --allow-same-version && cd ..
+          git add package.json package-lock.json sdk/package.json
           git diff --cached --quiet || git commit -m "chore: finalize v${VERSION}"
 
       - name: Install and test
@@ -309,8 +330,13 @@ jobs:
           npm ci
           npm run test:coverage
 
+      - name: Build SDK
+        run: cd sdk && npm ci && npm run build
+
       - name: Dry-run publish validation
-        run: npm publish --dry-run
+        run: |
+          npm publish --dry-run
+          cd sdk && npm publish --dry-run
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
 
@@ -360,6 +386,12 @@ jobs:
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
 
+      - name: Publish SDK to npm (latest)
+        if: ${{ !inputs.dry_run }}
+        run: cd sdk && npm publish --provenance --access public
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
       - name: Create GitHub Release
         if: ${{ !inputs.dry_run }}
         env:
@@ -380,6 +412,7 @@ jobs:
           # Point next to the stable release so @next never returns something
           # older than @latest. This prevents stale pre-release installs.
           npm dist-tag add "get-shit-done-cc@${VERSION}" next 2>/dev/null || true
+          npm dist-tag add "@gsd-build/sdk@${VERSION}" next 2>/dev/null || true
           echo "✓ next dist-tag updated to v${VERSION}"
 
       - name: Verify publish
@@ -394,6 +427,12 @@ jobs:
             exit 1
           fi
           echo "✓ Verified: get-shit-done-cc@$VERSION is live on npm"
+          SDK_PUBLISHED=$(npm view @gsd-build/sdk@"$VERSION" version 2>/dev/null || echo "NOT_FOUND")
+          if [ "$SDK_PUBLISHED" != "$VERSION" ]; then
+            echo "::error::SDK version verification failed. Expected $VERSION, got $SDK_PUBLISHED"
+            exit 1
+          fi
+          echo "✓ Verified: @gsd-build/sdk@$VERSION is live on npm"
           # Verify latest tag
           LATEST_TAG=$(npm dist-tag ls get-shit-done-cc 2>/dev/null | grep "latest:" | awk '{print $2}')
           echo "✓ latest tag points to: $LATEST_TAG"
@@ -408,6 +447,7 @@ jobs:
             echo "**DRY RUN** — npm publish, tagging, and push skipped" >> "$GITHUB_STEP_SUMMARY"
           else
             echo "- Published to npm as \`latest\`" >> "$GITHUB_STEP_SUMMARY"
+            echo "- SDK also published: \`@gsd-build/sdk@${VERSION}\` as \`latest\`" >> "$GITHUB_STEP_SUMMARY"
             echo "- Tagged \`v${VERSION}\`" >> "$GITHUB_STEP_SUMMARY"
             echo "- PR created to merge back to main" >> "$GITHUB_STEP_SUMMARY"
             echo "- Install: \`npx get-shit-done-cc@latest\`" >> "$GITHUB_STEP_SUMMARY"