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[MCP] Add support for resources (#5239)

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This PR adds support for [MCP
resources](https://modelcontextprotocol.io/specification/2025-06-18/server/resources)
by adding three new tools for the model:
1. `list_resources`
2. `list_resource_templates`
3. `read_resource`

These 3 tools correspond to the [three primary MCP resource protocol
messages](https://modelcontextprotocol.io/specification/2025-06-18/server/resources#protocol-messages).

Example of listing and reading a GitHub resource tempalte
<img width="2984" height="804" alt="CleanShot 2025-10-15 at 17 31 10"
src="https://github.com/user-attachments/assets/89b7f215-2e2a-41c5-90dd-b932ac84a585"
/>

`/mcp` with Figma configured
<img width="2984" height="442" alt="CleanShot 2025-10-15 at 18 29 35"
src="https://github.com/user-attachments/assets/a7578080-2ed2-4c59-b9b4-d8461f90d8ee"
/>

Fixes #4956
This commit is contained in:
Gabriel Peal
2025-10-16 22:05:15 -07:00
committed by GitHub
parent bdda762deb
commit 40fba1bb4c
18 changed files with 1705 additions and 24 deletions
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6
codex-rs/protocol/src/protocol.rs
View File

@@ -21,6 +21,8 @@ use crate::num_format::format_with_separators;
use crate::parse_command::ParsedCommand;
use crate::plan_tool::UpdatePlanArgs;
use mcp_types::CallToolResult;
use mcp_types::Resource as McpResource;
use mcp_types::ResourceTemplate as McpResourceTemplate;
use mcp_types::Tool as McpTool;
use serde::Deserialize;
use serde::Serialize;
@@ -1249,6 +1251,10 @@ pub struct GetHistoryEntryResponseEvent {
pub struct McpListToolsResponseEvent {
/// Fully qualified tool name -> tool definition.
pub tools: std::collections::HashMap<String, McpTool>,
/// Known resources grouped by server name.
pub resources: std::collections::HashMap<String, Vec<McpResource>>,
/// Known resource templates grouped by server name.
pub resource_templates: std::collections::HashMap<String, Vec<McpResourceTemplate>>,
/// Authentication status for each configured MCP server.
pub auth_statuses: std::collections::HashMap<String, McpAuthStatus>,
}