diff --git a/.github/workflows/commit-check.yml b/.github/workflows/commit-check.yml
new file mode 100644
index 0000000..a3400d0
--- /dev/null
+++ b/.github/workflows/commit-check.yml
@@ -0,0 +1,34 @@
+name: Conventional Commit Check for PR Title
+
+on:
+  workflow_call:
+
+jobs:
+  commit-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install commitlint
+        run: |
+          bun i -g @commitlint/cli
+          bun i -D @commitlint/config-conventional
+
+      - name: Create commitlint config if missing
+        run: |
+          if [ ! -f .commitlintrc.json ] && [ ! -f .commitlintrc.js ] && [ ! -f .commitlintrc.yml ] && [ ! -f .commitlintrc.yaml ] && ! grep -q '"commitlint"' "package.json" 2>/dev/null; then
+            echo "extends:" > .commitlintrc.yml
+            echo "  - '@commitlint/config-conventional'" >> .commitlintrc.yml
+          fi
+
+      - name: Check PR title
+        if: github.event_name == 'pull_request'
+        env:
+          PR_TITLE: ${{ github.event.pull_request.title }}
+        run: |
+          echo "$PR_TITLE" | commitlint
diff --git a/.github/workflows/markdown-check.yml b/.github/workflows/markdown-check.yml
new file mode 100644
index 0000000..95f2147
--- /dev/null
+++ b/.github/workflows/markdown-check.yml
@@ -0,0 +1,23 @@
+name: Markdown Lint
+
+on:
+  workflow_call:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install rumdl pre-compiled binary
+        # EXPECTED_SHA256 is obtained from `curl -sL $DOWNLOAD_URL | sha256sum`
+        run: |
+          DOWNLOAD_URL="https://github.com/rvben/rumdl/releases/download/v0.0.185/rumdl-v0.0.185-x86_64-unknown-linux-gnu.tar.gz"
+          EXPECTED_SHA256="5e6f28fa4935fb7d022c4f2d64f82b12206038d17e6570466afe7d7a3b135fba"
+          curl -sL $DOWNLOAD_URL -o /tmp/rumdl.tar.gz
+          echo "$EXPECTED_SHA256 /tmp/rumdl.tar.gz" | sha256sum -c -
+          tar -xzf /tmp/rumdl.tar.gz -C /usr/local/bin/
+          chmod +x /usr/local/bin/rumdl
+
+      - name: Lint Markdown
+        run: rumdl check --output-format github .
diff --git a/.github/workflows/pr-checks-self.yml b/.github/workflows/pr-checks-self.yml
new file mode 100644
index 0000000..af7576b
--- /dev/null
+++ b/.github/workflows/pr-checks-self.yml
@@ -0,0 +1,9 @@
+name: PR Checks
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, ready_for_review]
+
+jobs:
+  checks:
+    uses: ./.github/workflows/pr-checks.yml
diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
new file mode 100644
index 0000000..1646fb4
--- /dev/null
+++ b/.github/workflows/pr-checks.yml
@@ -0,0 +1,55 @@
+name: PR Checks
+
+on:
+  workflow_call:
+    inputs:
+      run-prettier:
+        description: "Run Prettier check"
+        required: false
+        type: boolean
+        default: true
+      run-markdown:
+        description: "Run Markdown check"
+        required: false
+        type: boolean
+        default: true
+      run-commits:
+        description: "Run Commit check"
+        required: false
+        type: boolean
+        default: true
+
+jobs:
+  check-draft:
+    runs-on: ubuntu-latest
+    outputs:
+      should-run: ${{ steps.check.outputs.should-run }}
+    steps:
+      - id: check
+        run: |
+          if [ "${{ github.event_name }}" != "pull_request" ] || [ "${{ github.event.pull_request.draft }}" != "true" ]; then
+            echo "should-run=true" >> $GITHUB_OUTPUT
+          else
+            echo "should-run=false" >> $GITHUB_OUTPUT
+          fi
+
+  prettier:
+    needs: check-draft
+    if:
+      needs.check-draft.outputs.should-run == 'true' && inputs.run-prettier !=
+      false
+    uses: ./.github/workflows/prettier.yml
+
+  markdown:
+    needs: check-draft
+    if:
+      needs.check-draft.outputs.should-run == 'true' && inputs.run-markdown !=
+      false
+    uses: ./.github/workflows/markdown-check.yml
+
+  commits:
+    needs: check-draft
+    if:
+      needs.check-draft.outputs.should-run == 'true' && inputs.run-commits !=
+      false
+    uses: ./.github/workflows/commit-check.yml
diff --git a/.github/workflows/prettier.yml b/.github/workflows/prettier.yml
new file mode 100644
index 0000000..fc9ca3f
--- /dev/null
+++ b/.github/workflows/prettier.yml
@@ -0,0 +1,41 @@
+name: Prettier Check
+
+on:
+  workflow_call:
+
+jobs:
+  prettier:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Check for Prettier config
+        run: |
+          CONFIG_FILES=".prettierrc .prettierrc.json .prettierrc.js .prettierrc.yaml .prettierrc.yml .prettierrc.toml prettier.config.js prettier.config.mjs"
+          HAS_CONFIG=false
+
+          for file in $CONFIG_FILES; do
+            if [ -f "$file" ]; then
+              HAS_CONFIG=true
+              break
+            fi
+          done
+
+          if [ "$HAS_CONFIG" = false ] && ! grep -q '"prettier"' "package.json" 2>/dev/null; then
+            echo "::error file=.prettierrc::No Prettier configuration file found."
+            echo "A Prettier config file is required to ensure consistent formatting across all developers."
+            echo "Without a shared config, each developer's local Prettier settings will differ, causing unnecessary formatting changes in commits."
+            echo "Please create a .prettierrc file in your repository root."
+            exit 1
+          fi
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install Prettier
+        run: bun i -g prettier
+
+      - name: Check formatting
+        run: prettier --check .
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3c3629e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..bd5535a
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1 @@
+pnpm-lock.yaml
diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..574245f
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,5 @@
+{
+  "printWidth": 80,
+  "proseWrap": "always",
+  "singleQuote": false
+}
diff --git a/README.md b/README.md
index 61ad4e5..56c8286 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,157 @@
-# Github Actions
+# GitHub Actions
+
+Shared GitHub Actions workflows for consistent code quality checks across
+repositories.
+
+## Available Workflows
+
+This repository provides reusable workflows for:
+
+- **Prettier Check** - Validates code formatting with Prettier
+- **Markdown Lint** - Lints Markdown files using rumdl
+- **Conventional Commit Check for PR Title** - Validates PR titles follow
+  conventional commit format
+- **PR Checks** - Combined workflow that runs all checks (or selected ones) with
+  draft PR handling
+
+## Usage
+
+### Option 1: Combined Workflow (Recommended for Simple Setup)
+
+Use the combined `pr-checks.yml` workflow to run all checks at once. This
+workflow automatically handles draft PRs and runs all checks by default.
+
+#### Basic Usage
+
+Create `.github/workflows/pr-checks.yml` in your repository:
+
+```yaml
+name: PR Checks
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, ready_for_review]
+
+jobs:
+  checks:
+    uses: holdex/github-actions/.github/workflows/pr-checks.yml@main
+```
+
+#### Selective Checks
+
+To run only specific checks, pass input flags:
+
+```yaml
+name: PR Checks
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, ready_for_review]
+
+jobs:
+  checks:
+    uses: holdex/github-actions/.github/workflows/pr-checks.yml@main
+    with:
+      run-prettier: true
+      run-markdown: false # Skip markdown check
+      run-commits: true
+```
+
+### Option 2: Individual Workflows
+
+Use individual workflows for granular control over when each check runs.
+
+#### Prettier Check
+
+```yaml
+name: Prettier Check
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  prettier:
+    uses: holdex/github-actions/.github/workflows/prettier.yml@main
+```
+
+**Requirements:**
+
+- Prettier configuration file (`.prettierrc`, `.prettierrc.json`, etc.) or
+  `prettier` config in `package.json`
+
+#### Markdown Lint
+
+```yaml
+name: Markdown Lint
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  markdown:
+    uses: holdex/github-actions/.github/workflows/markdown-check.yml@main
+```
+
+#### Conventional Commit Check
+
+```yaml
+name: Commit Check
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+
+jobs:
+  commits:
+    uses: holdex/github-actions/.github/workflows/commit-check.yml@main
+```
+
+**Requirements:**
+
+- Commitlint configuration file (`.commitlintrc.json`, etc.) or `commitlint`
+  config in `package.json`
+- If no config exists, the workflow will create a default `.commitlintrc.json`
+  file
+
+## Workflow Details
+
+### PR Checks (`pr-checks.yml`)
+
+The combined workflow includes:
+
+- **Draft PR handling** - Automatically skips checks for draft PRs
+- **Selective execution** - Control which checks run via inputs
+- **Default behavior** - Runs all checks if no inputs specified
+
+**Inputs:**
+
+- `run-prettier` (boolean, default: `true`) - Run Prettier check
+- `run-markdown` (boolean, default: `true`) - Run Markdown lint
+- `run-commits` (boolean, default: `true`) - Run commit check
+
+### Prettier Check (`prettier.yml`)
+
+- Validates that a Prettier configuration exists
+- Checks code formatting using Prettier
+- Supports all Prettier-supported file types
+- Uses Bun for package management
+
+### Markdown Lint (`markdown-check.yml`)
+
+- Uses `rumdl` v0.0.185 for fast Markdown linting
+- Checks all Markdown files in the repository
+- Reports issues with GitHub annotations
+
+### Conventional Commit Check (`commit-check.yml`)
+
+- Validates PR titles follow conventional commit format
+- Creates default commitlint config if missing (requires `package.json`)
+- Uses Bun for package management
+
+## Requirements
+
+- Node.js 22+
+- Bun (installed automatically in workflows)
+  - Uses the latest version of Bun
diff --git a/bun.lock b/bun.lock
new file mode 100644
index 0000000..77405a7
--- /dev/null
+++ b/bun.lock
@@ -0,0 +1,15 @@
+{
+  "lockfileVersion": 1,
+  "configVersion": 1,
+  "workspaces": {
+    "": {
+      "name": "github-actions",
+      "devDependencies": {
+        "prettier": "^3.7.4",
+      },
+    },
+  },
+  "packages": {
+    "prettier": ["prettier@3.7.4", "", { "bin": { "prettier": "bin/prettier.cjs" } }, "sha512-v6UNi1+3hSlVvv8fSaoUbggEM5VErKmmpGA7Pl3HF8V6uKY7rvClBOJlH6yNwQtfTueNkGVpOv/mtWL9L4bgRA=="],
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..a34bd1e
--- /dev/null
+++ b/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "github-actions",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "format": "prettier --write ."
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "prettier": "^3.7.4"
+  }
+}