ci: add python 3.15 and run lint, typecheck, and tests from one workflow

.github/workflows/ci.yml

@@ -0,0 +1,102 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    strategy:
+      fail-fast: false
+      matrix:
+        showcase:
+          - "ai/slackbot-mcp-client/no-auth"
+          - "ai/slackbot-mcp-client/rich-responses/mcp-apps"
+          - "ai/slackbot-mcp-client/slack-identity"
+          - "block-kit"
+          - "methods"
+    defaults:
+      run:
+        working-directory: ${{ matrix.showcase }}
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+      - name: Set up Python
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+        with:
+          python-version: "3.15"
+      - name: Install dependencies
+        run: |
+          pip install -U pip
+          pip install -r requirements.txt
+      - name: Lint and check formatting
+        run: |
+          ruff check .
+          ruff format --diff --check .
+  typecheck:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    strategy:
+      fail-fast: false
+      matrix:
+        showcase:
+          - "ai/slackbot-mcp-client/no-auth"
+          - "ai/slackbot-mcp-client/rich-responses/mcp-apps"
+          - "ai/slackbot-mcp-client/slack-identity"
+          - "block-kit"
+          - "methods"
+    defaults:
+      run:
+        working-directory: ${{ matrix.showcase }}
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+      - name: Set up Python
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+        with:
+          python-version: "3.15"
+      - name: Install dependencies
+        run: |
+          pip install -U pip
+          pip install -r requirements.txt
+      - name: Type check
+        run: |
+          mypy .
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    strategy:
+      fail-fast: false
+      matrix:
+        showcase:
+          - "ai/slackbot-mcp-client/no-auth"
+          - "ai/slackbot-mcp-client/rich-responses/mcp-apps"
+          - "ai/slackbot-mcp-client/slack-identity"
+          - "block-kit"
+    defaults:
+      run:
+        working-directory: ${{ matrix.showcase }}
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+      - name: Set up Python
+        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
+        with:
+          python-version: "3.15"
+      - name: Install dependencies
+        run: |
+          pip install -U pip
+          pip install -r requirements.txt
+      - name: Run all tests
+        run: |
+          pytest -v