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ui_resources.go
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package github
import (
"context"
"github.com/modelcontextprotocol/go-sdk/mcp"
)
// RegisterUIResources registers MCP App UI resources with the server.
// These are static resources (not templates) that serve HTML content for
// MCP App-enabled tools. The HTML is built from React/Primer components
// in the ui/ directory using `script/build-ui`.
func RegisterUIResources(s *mcp.Server) {
// Register the get_me UI resource
s.AddResource(
&mcp.Resource{
URI: GetMeUIResourceURI,
Name: "get_me_ui",
Description: "MCP App UI for the get_me tool",
MIMEType: MCPAppMIMEType,
},
func(_ context.Context, _ *mcp.ReadResourceRequest) (*mcp.ReadResourceResult, error) {
html := MustGetUIAsset("get-me.html")
return &mcp.ReadResourceResult{
Contents: []*mcp.ResourceContents{
{
URI: GetMeUIResourceURI,
MIMEType: MCPAppMIMEType,
Text: html,
// MCP Apps UI metadata - CSP configuration to allow loading GitHub avatars
// See: https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/draft/apps.mdx
Meta: mcp.Meta{
"ui": map[string]any{
"csp": map[string]any{
// Allow loading images from GitHub's avatar CDN
"resourceDomains": []string{"https://avatars.githubusercontent.com"},
},
},
},
},
},
}, nil
},
)
// Register the issue_write UI resource
s.AddResource(
&mcp.Resource{
URI: IssueWriteUIResourceURI,
Name: "issue_write_ui",
Description: "MCP App UI for creating and updating GitHub issues",
MIMEType: MCPAppMIMEType,
},
func(_ context.Context, _ *mcp.ReadResourceRequest) (*mcp.ReadResourceResult, error) {
html := MustGetUIAsset("issue-write.html")
return &mcp.ReadResourceResult{
Contents: []*mcp.ResourceContents{
{
URI: IssueWriteUIResourceURI,
MIMEType: MCPAppMIMEType,
Text: html,
},
},
}, nil
},
)
// Register the create_pull_request UI resource
s.AddResource(
&mcp.Resource{
URI: PullRequestWriteUIResourceURI,
Name: "pr_write_ui",
Description: "MCP App UI for creating GitHub pull requests",
MIMEType: MCPAppMIMEType,
},
func(_ context.Context, _ *mcp.ReadResourceRequest) (*mcp.ReadResourceResult, error) {
html := MustGetUIAsset("pr-write.html")
return &mcp.ReadResourceResult{
Contents: []*mcp.ResourceContents{
{
URI: PullRequestWriteUIResourceURI,
MIMEType: MCPAppMIMEType,
Text: html,
},
},
}, nil
},
)
}