add feature support of antigravity,with unit test and integration test, with make changes in supported files

Author: Parveen-Birthaliya

README.md

@@ -54,7 +54,7 @@ Get started in minutes:
 ## How It Works
 
 1. **Security rules** are written in unified markdown format (`sources/` directory)
-2. **Conversion tools** translate rules to IDE-specific formats (Cursor, Windsurf, Copilot, Claude Code)
+2. **Conversion tools** translate rules to IDE-specific formats (Cursor, Windsurf, Copilot, Claude Code,antigravity)
 3. **Release automation** packages rules into downloadable ZIP files
 4. **AI assistants** reference these rules when generating or reviewing code
 5. **Secure code** is produced automatically without developer intervention

docs/getting-started.md

@@ -31,6 +31,11 @@ Before you begin, familiarize yourself with how rules work in your IDE:
 
     :material-book-open-page-variant: [GitHub Copilot Instructions](https://docs.github.com/en/copilot/how-tos/configure-custom-instructions/add-repository-instructions)
 
+=== "Google AntiGravity"
+    Google AntiGravity uses `.agent/rules` for rule configuration.
+
+    :material-book-open-page-variant: [Google AntiGravity Instructions](https://codelabs.developers.google.com/getting-started-google-antigravity#6)
+
 ## Installation
 
 ### Option 1: Download Pre-built Rules (Recommended)
@@ -95,6 +100,7 @@ uv run python src/convert_to_ide_formats.py --source core owasp
 cp -r dist/.cursor/ /path/to/your/project/
 cp -r dist/.windsurf/ /path/to/your/project/
 cp -r dist/.github/ /path/to/your/project/
+cp -r dist/.agent/ /path/to/your/project/
 ```
 
 ## Verify Installation
@@ -103,6 +109,8 @@ After installation, your project structure should include:
 
 ```
 your-project/
+├── .agent/
+│   └── rules/
 ├── .cursor/
 │   └── rules/
 ├── .windsurf/

src/convert_to_ide_formats.py

@@ -16,7 +16,7 @@
 from collections import defaultdict
 
 from converter import RuleConverter
-from formats import CursorFormat, WindsurfFormat, CopilotFormat, ClaudeCodeFormat
+from formats import CursorFormat, WindsurfFormat, CopilotFormat, ClaudeCodeFormat, AntigravityFormat
 from utils import get_version_from_pyproject
 from validate_versions import set_plugin_version, set_marketplace_version
 
@@ -128,6 +128,7 @@ def convert_rules(input_path: str, output_dir: str = "dist", include_claudecode:
         CursorFormat(version),
         WindsurfFormat(version),
         CopilotFormat(version),
+        AntigravityFormat(version),
     ]
 
     # Only include Claude Code for core rules (committed plugin)

src/formats/__init__.py

@@ -30,6 +30,7 @@
 from formats.windsurf import WindsurfFormat
 from formats.copilot import CopilotFormat
 from formats.claudecode import ClaudeCodeFormat
+from formats.antigravity import AntigravityFormat
 
 __all__ = [
     "BaseFormat",
@@ -38,4 +39,5 @@
     "WindsurfFormat",
     "CopilotFormat",
     "ClaudeCodeFormat",
+    "AntigravityFormat",
 ]

src/formats/antigravity.py

@@ -0,0 +1,66 @@
+# Copyright 2025 Cisco Systems, Inc. and its affiliates
+#
+# SPDX-License-Identifier: Apache-2.0
+
+"""
+Antigravity Format Implementation
+
+Generates .md workflow files for Google Antigravity with YAML frontmatter.
+"""
+
+from formats.base import BaseFormat, ProcessedRule
+
+
+class AntigravityFormat(BaseFormat):
+    """
+    Google Antigravity format implementation (.md workflow files).
+
+    Antigravity uses .md files with YAML frontmatter containing:
+    - description: Rule description (required by Antigravity spec)
+    
+    Workflows are stored in .agent/workflows/ and can be triggered
+    on-demand with /workflow-name in the Antigravity interface.
+    """
+
+    def get_format_name(self) -> str:
+        """Return Antigravity format identifier."""
+        return "antigravity"
+
+    def get_file_extension(self) -> str:
+        """Return Antigravity format file extension."""
+        return ".md"
+
+    def get_output_subpath(self) -> str:
+        """Return Antigravity output subdirectory."""
+        return ".agent/rules"
+
+    def generate(self, rule: ProcessedRule, globs: str) -> str:
+        """
+        Generate Antigravity .md format with YAML frontmatter.
+
+        Args:
+            rule: The processed rule to format
+            globs: Glob patterns for file matching (not used by Antigravity)
+
+        Returns:
+            Formatted .md content with minimal frontmatter
+        
+        Note:
+            Antigravity workflows use simple markdown with description-only
+            frontmatter. Language/glob information is not needed as workflows
+            are triggered manually by the user.
+        """
+        yaml_lines = []
+
+        # Add description (required by Antigravity spec)
+        desc = self._format_yaml_field("description", rule.description)
+        if desc:
+            yaml_lines.append(desc)
+        
+        # Optional: Add tags for categorization (if Antigravity supports it)
+        if rule.tags:
+            yaml_lines.append("tags:")
+            for tag in rule.tags:
+                yaml_lines.append(f"- {tag}")
+
+        return self._build_yaml_frontmatter(yaml_lines, rule.content)