# Agent Plugins Validates portable plugin packages against the [Agent Plugins v1 specification](https://agent-plugins.org/specification). The manifest rule checks the required root `plugin.json`; the MCP rule checks optional root `mcp.json`. Auto-enabled when a root or immediate `plugins/*` manifest declares a canonical Agent Plugins schema; use `--type agent-plugin` to force validation. | Rule ID | Description | Default Severity | Autofix | |---------|-------------|------------------|---------| | [`agent-plugin-json-valid`](agent-plugin-json-valid.md) | Agent Plugins plugin.json and skills location must conform to a supported schema | error (auto) | - | | [`agent-plugin-mcp-valid`](agent-plugin-mcp-valid.md) | Agent Plugins mcp.json must conform to a supported schema and semantics | error (auto) | - | | [`agent-plugin-required`](agent-plugin-required.md) | Plugins must also be available as vendor-neutral Agent Plugins v1 packages, with shared manifest metadata in sync | warning (disabled) | auto |