- Enhanced AGENTS.md and CONTRIBUTING.md to clarify the structure and requirements for the Agent Plugins package, including the need for `plugin.json` to be schema-valid and version-synced with `pyproject.toml`.
- Updated README.md to reflect the new version 2.63.0 and added details about the repository being a portable Agent Plugins package.
- Added tests in test_repo_contract.py to ensure compliance with the Agent Plugins manifest schema and discoverability of skills.
This update ensures better adherence to the Agent Plugins standard and improves the overall documentation for contributors.
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