## What changed
- Add environment-provided MCP restrictions for configured and plugin-provided servers.
- Disable attachment-scoped servers while their environment configuration is pending, failed, or unselected, while preserving selected-plugin access and the controller-owned Apps server.
- Apply the resolved policy to runtime startup, model tool exposure, telemetry, OAuth flows, and skill dependency installation.
## Testing
- Cover policy filtering for configured and plugin servers, environment state transitions, Apps ownership, and managed OAuth rejection.
GitOrigin-RevId: 7ca5d4dda14068e758497f88835d5cba685e159e
## What changed
- Define MCP server identities, matchers, requirements, and per-plugin MCP requirements in the new `codex_protocol::mcp_policy` module.
- Keep requirement validation and matching against `McpServerConfig` in `codex-config`.
- Re-export the moved types from `codex-config` to preserve existing consumers.
GitOrigin-RevId: ad8a107e3085191241a5766f061dd004103e21e6
sayan-oai