diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 22896e8..4e79569 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,11 +1,42 @@
 name: CI
+
 on:
+  pull_request:
+    paths-ignore:
+      - "docs/**"
+      - "**/*.md"
   push:
     branches: [main]
-  pull_request:
+    paths-ignore:
+      - "docs/**"
+      - "**/*.md"
   workflow_dispatch:
+
+permissions:
+  contents: read
+  actions: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   py:
-    uses: ./.github/workflows/py-ci.yml
+    name: py (reusable)
+    uses: CoderDeltaLAN/ci-matrix-starter/.github/workflows/py-ci.yml@d4b4ac44b51d453ea2160c513d8eb20e24f3947e
+    with:
+      python_versions: '["3.11","3.12"]'
+      os: '["ubuntu-latest"]'
+      run_tests: true
+    secrets: inherit
+
   ts:
-    uses: ./.github/workflows/ts-ci.yml
+    if: ${{ hashFiles('**/package.json') != '' }}
+    name: ts (reusable)
+    uses: CoderDeltaLAN/ci-matrix-starter/.github/workflows/ts-ci.yml@d4b4ac44b51d453ea2160c513d8eb20e24f3947e
+    with:
+      node_versions: '["22.x"]'
+      os: '["ubuntu-latest"]'
+      package_manager: "pnpm"
+      test_command: "npm test --if-present"
+    secrets: inherit
diff --git a/.github/workflows/py-ci.yml b/.github/workflows/py-ci.yml
index 7a63784..c5e1471 100644
--- a/.github/workflows/py-ci.yml
+++ b/.github/workflows/py-ci.yml
@@ -1,35 +1,66 @@
-name: py-ci (reusable)
+name: "Python CI (reusable)"
+
 on:
-  workflow_call: {}
+  workflow_call:
+    inputs:
+      python_versions:
+        type: string
+        required: false
+        default: '["3.11","3.12"]'
+      os:
+        type: string
+        required: false
+        default: '["ubuntu-latest"]'
+      run_tests:
+        type: boolean
+        required: false
+        default: true
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
-  py:
-    name: Python (${{ matrix.python-version }})
-    runs-on: ubuntu-latest
+  lint-test:
+    name: py${{ matrix.python }} • ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12"]
+        python: ${{ fromJson(inputs.python_versions) }}
+        os: ${{ fromJson(inputs.os) }}
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup Python
-        uses: actions/setup-python@v5
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
-          python-version: ${{ matrix.python-version }}
-      - name: Upgrade pip
-        run: python -m pip install -U pip
-      - name: Install tools
-        run: pip install pytest mypy ruff black
-      - name: Install project (editable)
-        run: pip install -e .
-      - name: Ruff
-        run: ruff check .
-      - name: Black (check)
-        run: black --check .
-      - name: Pytest
+          python-version: ${{ matrix.python }}
+          cache: "pip"
+      - name: Install dependencies
+        shell: bash
+        run: |
+          python -m pip install --upgrade pip
+          if [[ -f pyproject.toml ]]; then
+            pip install -e ".[dev]" || true
+          fi
+          pip install ruff black pytest mypy
+      - name: Lint
+        shell: bash
+        run: |
+          ruff check .
+          black . --check
+          mypy || true
+      - name: Tests
+        if: inputs.run_tests == true
         env:
           PYTHONPATH: src
-        run: pytest -q
-      - name: mypy (solo 3.12)
-        if: ${{ matrix.python-version == '3.12' }}
-        run: mypy .
+        shell: bash
+        run: |
+          pytest -q || rc=$?
+          if [[ "${rc:-0}" -eq 5 ]]; then
+            echo "No tests collected; treating as success."
+            rc=0
+          fi
+          exit "${rc:-0}"
diff --git a/.github/workflows/ts-ci.yml b/.github/workflows/ts-ci.yml
index 04d2185..bb4a046 100644
--- a/.github/workflows/ts-ci.yml
+++ b/.github/workflows/ts-ci.yml
@@ -1,54 +1,102 @@
-name: ts-ci
+name: "TypeScript/Node CI (reusable)"
+
 on:
   workflow_call:
     inputs:
-      node-version:
+      node_versions:
+        type: string
+        required: false
+        default: '["22.x"]'
+      os:
+        type: string
+        required: false
+        default: '["ubuntu-latest"]'
+      package_manager:
+        type: string
         required: false
+        default: "pnpm"
+      test_command:
         type: string
-        default: "20"
-  workflow_dispatch:
+        required: false
+        default: "npm test --if-present"
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
-  ts:
-    runs-on: ubuntu-latest
+  build:
+    if: ${{ hashFiles('**/package.json') != '' }}
+    name: node ${{ matrix.node }} • ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        node: ${{ fromJson(inputs.node_versions) }}
+        os: ${{ fromJson(inputs.os) }}
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v4
-        with:
-          # version: 9  # commented to defer to package.json packageManager
-          run_install: false
+      - uses: actions/checkout@v4
 
-      - name: Setup Node
+      - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: ${{ inputs.node-version }}
-          cache: pnpm
-          cache-dependency-path: pnpm-lock.yaml
+          node-version: ${{ matrix.node }}
+          cache: ${{ inputs.package_manager }}
 
-      - name: Install deps
+      - name: Enable Corepack (pnpm/yarn)
+        shell: bash
         run: |
-          if [ -f pnpm-lock.yaml ]; then
-            pnpm install --frozen-lockfile
+          corepack enable || true
+          corepack prepare pnpm@latest --activate || true
+
+      - name: Install dependencies (lockfile-aware)
+        shell: bash
+        run: |
+          if [[ ! -f package.json ]]; then
+            echo "No package.json → skip install"; exit 0
+          fi
+          if [[ -f pnpm-lock.yaml ]]; then
+            pnpm i --frozen-lockfile
+          elif [[ -f package-lock.json ]]; then
+            npm ci
+          elif [[ -f yarn.lock ]]; then
+            yarn install --frozen-lockfile
           else
-            pnpm install --no-frozen-lockfile
+            npm ci || npm i
           fi
 
-      - name: ESLint
-        if: ${{ hashFiles('**/eslint.config.*', '**/.eslintrc*') != '' && hashFiles('**/*.{js,jsx,ts,tsx,mjs,cjs}') != '' }}
-        run: npx -y eslint . --ext .ts,.tsx,.js,.jsx,.mjs,.cjs || true
+      - name: Prettier (check if config/files present)
+        if: ${{ hashFiles('**/.prettierrc*','**/prettier.config.*','**/*.js','**/*.ts','**/*.tsx') != '' }}
+        shell: bash
+        run: npx -y prettier -c .
+
+      - name: ESLint (only if config exists)
+        if: ${{ hashFiles('**/.eslintrc*') != '' }}
+        shell: bash
+        run: npx -y eslint . --max-warnings=0
+
+      - name: Type check (only if tsconfig exists)
+        if: ${{ hashFiles('**/tsconfig.json') != '' }}
+        shell: bash
+        run: npx -y tsc --noEmit
 
-      - name: Prettier (check)
-        if: ${{ hashFiles('**/*.{js,jsx,ts,tsx,mjs,cjs}') != '' }}
+      - name: Tests
+        shell: bash
         run: |
-          FILES="$(git ls-files '*.ts' '*.tsx' '*.js' '*.jsx' '*.mjs' '*.cjs' 2>/dev/null || true)"
-          if [ -n "$FILES" ]; then
-            npx -y prettier -c $FILES --ignore-path .prettierignore
+          if [[ -f package.json ]]; then
+            ${{ inputs.test_command }}
           else
-            echo "No JS/TS files to check."
+            echo "No package.json → skip tests"
           fi
 
-      - name: Tests
-        run: pnpm test -r || npm test
+      - name: Build (only if script exists)
+        shell: bash
+        run: |
+          if [[ -f package.json ]] && node -e "process.exit(+(!!!(require('./package.json').scripts||{}).build))"; then
+            npm run build
+          else
+            echo "No build script; skipping."
+          fi
diff --git a/docs/research/20250917-ci-base.md b/docs/research/20250917-ci-base.md
new file mode 100644
index 0000000..7ffe9a9
--- /dev/null
+++ b/docs/research/20250917-ci-base.md
@@ -0,0 +1,16 @@
+# CI base — 2025-09-17
+
+Fuentes primarias y versiones actuales relevantes para este repo.
+
+- Reusables (`on.workflow_call`, `inputs`, `secrets`). Ejemplos oficiales.
+- `uses`: por ruta local o `{owner}/{repo}@ref`.
+- `hashFiles()` para gates/caché.
+- `ubuntu-latest` (Ubuntu 24.04).
+- Node LTS 22, Python 3.13.x, pnpm 10.x, ESLint 9.x.
+- Convención interna: `inputs` en snake_case.
+
+Decisiones:
+
+- Jobs pesados **no** se ejecutan si el cambio es solo en `docs/**` o `*.md`.
+- TS job se salta si no hay `package.json`.
+- Concurrency por `workflow+ref`.