revert changes to resource URI

Author: LuluBeatson

pkg/github/repositories.go

@@ -540,11 +540,6 @@ func GetFileContents(getClient GetClientFn, getRawClient raw.GetRawClientFn, t t
 
 					var resourceURI string
 					switch {
-					case fileSHA != "":
-						resourceURI, err = url.JoinPath("repo://", owner, repo, "sha", fileSHA, "contents", path)
-						if err != nil {
-							return nil, fmt.Errorf("failed to create resource URI: %w", err)
-						}
 					case sha != "":
 						resourceURI, err = url.JoinPath("repo://", owner, repo, "sha", sha, "contents", path)
 						if err != nil {

pkg/github/repositories_test.go

@@ -106,7 +106,7 @@ func Test_GetFileContents(t *testing.T) {
 			},
 			expectError: false,
 			expectedResult: mcp.TextResourceContents{
-				URI:      "repo://owner/repo/sha/abc123/contents/README.md",
+				URI:      "repo://owner/repo/refs/heads/main/contents/README.md",
 				Text:     "# Test Repository\n\nThis is a test repository.",
 				MIMEType: "text/markdown",
 			},
@@ -151,7 +151,7 @@ func Test_GetFileContents(t *testing.T) {
 			},
 			expectError: false,
 			expectedResult: mcp.BlobResourceContents{
-				URI:      "repo://owner/repo/sha/def456/contents/test.png",
+				URI:      "repo://owner/repo/refs/heads/main/contents/test.png",
 				Blob:     base64.StdEncoding.EncodeToString(mockRawContent),
 				MIMEType: "image/png",
 			},