Matt Holloway
69f786b87c
* Explicitly set prefersBorder on every UI resource — false for the get_me profile card, true for the issue/PR write forms — since hosts' defaults vary. * Declare an empty csp on issue_write_ui and pr_write_ui to document that they need no external origins. * Point spec link comment at the stable 2026-01-26 location. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
107 lines
3.0 KiB
Go
107 lines
3.0 KiB
Go
package github
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import (
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"context"
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"github.com/modelcontextprotocol/go-sdk/mcp"
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)
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// RegisterUIResources registers MCP App UI resources with the server.
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// These are static resources (not templates) that serve HTML content for
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// MCP App-enabled tools. The HTML is built from React/Primer components
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// in the ui/ directory using `script/build-ui`.
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//
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// Resource metadata follows the stable 2026-01-26 MCP Apps spec:
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// https://github.com/modelcontextprotocol/ext-apps/blob/main/specification/2026-01-26/apps.mdx
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func RegisterUIResources(s *mcp.Server) {
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// Register the get_me UI resource
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s.AddResource(
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&mcp.Resource{
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URI: GetMeUIResourceURI,
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Name: "get_me_ui",
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Description: "MCP App UI for the get_me tool",
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MIMEType: MCPAppMIMEType,
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},
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func(_ context.Context, _ *mcp.ReadResourceRequest) (*mcp.ReadResourceResult, error) {
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html := MustGetUIAsset("get-me.html")
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return &mcp.ReadResourceResult{
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Contents: []*mcp.ResourceContents{
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{
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URI: GetMeUIResourceURI,
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MIMEType: MCPAppMIMEType,
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Text: html,
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Meta: mcp.Meta{
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"ui": map[string]any{
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// Allow loading images from GitHub's avatar CDN.
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"csp": map[string]any{
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"resourceDomains": []string{"https://avatars.githubusercontent.com"},
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},
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// Profile card renders inline within chat without a host border.
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"prefersBorder": false,
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},
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},
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},
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},
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}, nil
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},
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)
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// Register the issue_write UI resource
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s.AddResource(
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&mcp.Resource{
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URI: IssueWriteUIResourceURI,
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Name: "issue_write_ui",
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Description: "MCP App UI for creating and updating GitHub issues",
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MIMEType: MCPAppMIMEType,
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},
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func(_ context.Context, _ *mcp.ReadResourceRequest) (*mcp.ReadResourceResult, error) {
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html := MustGetUIAsset("issue-write.html")
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return &mcp.ReadResourceResult{
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Contents: []*mcp.ResourceContents{
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{
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URI: IssueWriteUIResourceURI,
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MIMEType: MCPAppMIMEType,
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Text: html,
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Meta: mcp.Meta{
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"ui": map[string]any{
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// No external origins required; documents the secure default.
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"csp": map[string]any{},
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// Form surface benefits from a host-provided border.
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"prefersBorder": true,
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},
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},
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},
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},
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}, nil
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},
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)
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// Register the create_pull_request UI resource
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s.AddResource(
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&mcp.Resource{
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URI: PullRequestWriteUIResourceURI,
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Name: "pr_write_ui",
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Description: "MCP App UI for creating GitHub pull requests",
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MIMEType: MCPAppMIMEType,
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},
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func(_ context.Context, _ *mcp.ReadResourceRequest) (*mcp.ReadResourceResult, error) {
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html := MustGetUIAsset("pr-write.html")
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return &mcp.ReadResourceResult{
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Contents: []*mcp.ResourceContents{
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{
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URI: PullRequestWriteUIResourceURI,
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MIMEType: MCPAppMIMEType,
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Text: html,
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Meta: mcp.Meta{
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"ui": map[string]any{
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"csp": map[string]any{},
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"prefersBorder": true,
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},
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},
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},
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},
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}, nil
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},
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)
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}
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