Add missing milestone to create_issue (github#88)

Author: williammartin

pkg/github/issues.go

@@ -261,6 +261,9 @@ func createIssue(client *github.Client, t translations.TranslationHelperFunc) (t
 					},
 				),
 			),
+			mcp.WithNumber("milestone",
+				mcp.Description("Milestone number"),
+			),
 		),
 		func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
 			owner, err := requiredParam[string](request, "owner")
@@ -294,12 +297,24 @@ func createIssue(client *github.Client, t translations.TranslationHelperFunc) (t
 				return mcp.NewToolResultError(err.Error()), nil
 			}
 
+			// Get optional milestone
+			milestone, err := optionalIntParam(request, "milestone")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			var milestoneNum *int
+			if milestone != 0 {
+				milestoneNum = &milestone
+			}
+
 			// Create the issue request
 			issueRequest := &github.IssueRequest{
 				Title:     github.Ptr(title),
 				Body:      github.Ptr(body),
 				Assignees: &assignees,
 				Labels:    &labels,
+				Milestone: milestoneNum,
 			}
 
 			issue, resp, err := client.Issues.Create(ctx, owner, repo, issueRequest)

pkg/github/issues_test.go

@@ -392,6 +392,7 @@ func Test_CreateIssue(t *testing.T) {
 	assert.Contains(t, tool.InputSchema.Properties, "body")
 	assert.Contains(t, tool.InputSchema.Properties, "assignees")
 	assert.Contains(t, tool.InputSchema.Properties, "labels")
+	assert.Contains(t, tool.InputSchema.Properties, "milestone")
 	assert.ElementsMatch(t, tool.InputSchema.Required, []string{"owner", "repo", "title"})
 
 	// Setup mock issue for success case
@@ -403,6 +404,7 @@ func Test_CreateIssue(t *testing.T) {
 		HTMLURL:   github.Ptr("https://github.com/owner/repo/issues/123"),
 		Assignees: []*github.User{{Login: github.Ptr("user1")}, {Login: github.Ptr("user2")}},
 		Labels:    []*github.Label{{Name: github.Ptr("bug")}, {Name: github.Ptr("help wanted")}},
+		Milestone: &github.Milestone{Number: github.Ptr(5)},
 	}
 
 	tests := []struct {
@@ -423,6 +425,7 @@ func Test_CreateIssue(t *testing.T) {
 						"body":      "This is a test issue",
 						"labels":    []any{"bug", "help wanted"},
 						"assignees": []any{"user1", "user2"},
+						"milestone": float64(5),
 					}).andThen(
 						mockResponse(t, http.StatusCreated, mockIssue),
 					),
@@ -435,6 +438,7 @@ func Test_CreateIssue(t *testing.T) {
 				"body":      "This is a test issue",
 				"assignees": []string{"user1", "user2"},
 				"labels":    []string{"bug", "help wanted"},
+				"milestone": float64(5),
 			},
 			expectError:   false,
 			expectedIssue: mockIssue,