feat(bundles): add editorial bundle plugins

plugins/antigravity-bundle-python-pro/skills/python-testing-patterns/SKILL.md

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+---
+name: python-testing-patterns
+description: "Implement comprehensive testing strategies with pytest, fixtures, mocking, and test-driven development. Use when writing Python tests, setting up test suites, or implementing testing best practices."
+risk: unknown
+source: community
+date_added: "2026-02-27"
+---
+
+# Python Testing Patterns
+
+Comprehensive guide to implementing robust testing strategies in Python using pytest, fixtures, mocking, parameterization, and test-driven development practices.
+
+## Use this skill when
+
+- Writing unit tests for Python code
+- Setting up test suites and test infrastructure
+- Implementing test-driven development (TDD)
+- Creating integration tests for APIs and services
+- Mocking external dependencies and services
+- Testing async code and concurrent operations
+- Setting up continuous testing in CI/CD
+- Implementing property-based testing
+- Testing database operations
+- Debugging failing tests
+
+## Do not use this skill when
+
+- The task is unrelated to python testing patterns
+- You need a different domain or tool outside this scope
+
+## Instructions
+
+- Clarify goals, constraints, and required inputs.
+- Apply relevant best practices and validate outcomes.
+- Provide actionable steps and verification.
+- If detailed examples are required, open `resources/implementation-playbook.md`.
+
+## Resources
+
+- `resources/implementation-playbook.md` for detailed patterns and examples.