diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
new file mode 100644
index 000000000..81f934d6a
--- /dev/null
+++ b/.github/workflows/build.yaml
@@ -0,0 +1,98 @@
+name: Build Packages
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+  workflow_dispatch:
+    inputs:
+      pr_number:
+        description: 'PR number to build and release'
+        required: true
+        type: number
+  push:
+    branches: ["main"]
+
+env:
+  TANGRAM_CI_DIR: ${{ github.workspace }}/../.tangram-ci-${{ github.event.repository.name }}
+  TG_EXE: ${{ github.workspace }}/../.tangram-ci-${{ github.event.repository.name }}/bin/tangram
+
+jobs:
+  test:
+    if: github.event_name == 'pull_request' || github.event_name == 'workflow_dispatch'
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      matrix:
+        include:
+          - runner: [self-hosted, macOS, ARM64]
+            enabled: true
+          - runner: [self-hosted, Linux, X64]
+            enabled: false
+
+    steps:
+      - name: Check out packages repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event_name == 'workflow_dispatch' && format('refs/pull/{0}/head', github.event.inputs.pr_number) || github.ref }}
+
+      - name: Configure Tangram
+        run: |
+          mkdir -p "$TANGRAM_CI_DIR/bin"
+          cat > "$TANGRAM_CI_DIR/config.json" << 'EOF'
+          {}
+          EOF
+          cat > "$TANGRAM_CI_DIR/bin/tangram" << 'EOF'
+          #!/bin/sh
+          exec tangram --directory "$TANGRAM_CI_DIR" --config "$TANGRAM_CI_DIR/config.json" "$@"
+          EOF
+          chmod +x "$TANGRAM_CI_DIR/bin/tangram"
+
+      - name: Test packages
+        if: matrix.enabled
+        shell: bash
+        run: |
+          "$TG_EXE" server start
+          while [ "$("$TG_EXE" server status)" != "started" ]; do
+            sleep 1
+          done
+          bun run auto --test --sequential
+          "$TG_EXE" server stop
+
+  release:
+    if: github.event_name == 'workflow_dispatch' || (github.event_name == 'push' && github.ref == 'refs/heads/main')
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      matrix:
+        include:
+          - runner: [self-hosted, macOS, ARM64]
+            enabled: true
+          - runner: [self-hosted, Linux, X64]
+            enabled: false
+
+    steps:
+      - name: Check out packages repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event_name == 'workflow_dispatch' && format('refs/pull/{0}/head', github.event.inputs.pr_number) || github.ref }}
+
+      - name: Configure Tangram
+        run: |
+          mkdir -p "$TANGRAM_CI_DIR/bin"
+          cat > "$TANGRAM_CI_DIR/config.json" << 'EOF'
+          {}
+          EOF
+          cat > "$TANGRAM_CI_DIR/bin/tangram" << 'EOF'
+          #!/bin/sh
+          exec tangram --directory "$TANGRAM_CI_DIR" --config "$TANGRAM_CI_DIR/config.json" "$@"
+          EOF
+          chmod +x "$TANGRAM_CI_DIR/bin/tangram"
+
+      - name: Release packages
+        if: matrix.enabled
+        shell: bash
+        run: |
+          "$TG_EXE" server start
+          while [ "$("$TG_EXE" server status)" != "started" ]; do
+            sleep 1
+          done
+          bun run auto --release --sequential
+          "$TG_EXE" server stop
diff --git a/.gitignore b/.gitignore
index c291c9fde..e1ddf8b1d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 node_modules
 tangram.lock
 target
+Claude.md