refactor: source CLI version from code in publish workflow (#350)

Remove the claude_code_version workflow input and instead read the CLI
version directly from src/claude_agent_sdk/_cli_version.py. This allows
the version to be managed separately and updated by automation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <[email protected]>

Author: ashwin-ant

.github/workflows/publish.yml

@@ -7,11 +7,6 @@ on:
         description: 'Package version to publish (e.g., 0.1.4)'
         required: true
         type: string
-      claude_code_version:
-        description: 'Claude Code CLI version to bundle (e.g., 2.0.0 or latest)'
-        required: false
-        type: string
-        default: 'latest'
 jobs:
   test:
     runs-on: ubuntu-latest
@@ -91,7 +86,6 @@ jobs:
       run: |
         python scripts/build_wheel.py \
           --version "${{ github.event.inputs.version }}" \
-          --cli-version "${{ github.event.inputs.claude_code_version }}" \
           --skip-sdist \
           --clean
       shell: bash
@@ -132,9 +126,12 @@ jobs:
       run: |
         python scripts/update_version.py "${{ env.VERSION }}"
 
-    - name: Update CLI version
+    - name: Read CLI version from code
+      id: cli_version
       run: |
-        python scripts/update_cli_version.py "${{ github.event.inputs.claude_code_version }}"
+        CLI_VERSION=$(python -c "import re; print(re.search(r'__cli_version__ = \"([^\"]+)\"', open('src/claude_agent_sdk/_cli_version.py').read()).group(1))")
+        echo "cli_version=$CLI_VERSION" >> $GITHUB_OUTPUT
+        echo "Bundled CLI version: $CLI_VERSION"
 
     - name: Download all wheel artifacts
       uses: actions/download-artifact@v4
@@ -181,8 +178,8 @@ jobs:
         git checkout -b "$BRANCH_NAME"
 
         # Commit version changes
-        git add pyproject.toml src/claude_agent_sdk/_version.py src/claude_agent_sdk/_cli_version.py
-        git commit -m "chore: bump version to ${{ env.VERSION }} with CLI ${{ github.event.inputs.claude_code_version }}"
+        git add pyproject.toml src/claude_agent_sdk/_version.py
+        git commit -m "chore: release v${{ env.VERSION }}"
 
     - name: Update changelog with Claude
       continue-on-error: true
@@ -207,12 +204,11 @@ jobs:
         ## Changes
         - Updated version in \`pyproject.toml\` to ${{ env.VERSION }}
         - Updated version in \`src/claude_agent_sdk/_version.py\` to ${{ env.VERSION }}
-        - Updated bundled CLI version in \`src/claude_agent_sdk/_cli_version.py\` to ${{ github.event.inputs.claude_code_version }}
         - Updated \`CHANGELOG.md\` with release notes
 
         ## Release Information
         - Published to PyPI: https://pypi.org/project/claude-agent-sdk/${{ env.VERSION }}/
-        - Bundled CLI version: ${{ github.event.inputs.claude_code_version }}
+        - Bundled CLI version: ${{ steps.cli_version.outputs.cli_version }}
         - Install with: \`pip install claude-agent-sdk==${{ env.VERSION }}\`
 
         🤖 Generated by GitHub Actions"