fix: populate Content in toolkit PromptInfos and add JSON proof test (#221)

Portal and knowledge toolkits had Content constants defined but never
included them in their PromptInfos() return values, so the platform_info
JSON response omitted the content field for toolkit prompts. Add a test
that marshals prompt infos to JSON and asserts the content key appears.

Author: cjimti

pkg/platform/prompts_test.go

@@ -2,6 +2,7 @@ package platform
 
 import (
 	"context"
+	"encoding/json"
 	"strings"
 	"testing"
 
@@ -559,6 +560,54 @@ func TestPromptMetadataCollection(t *testing.T) {
 	}
 }
 
+func TestPromptContentInJSON(t *testing.T) {
+	reg := registry.NewRegistry()
+	_ = reg.Register(&mockToolkit{kind: "datahub", name: "primary"})
+
+	mcpServer := mcp.NewServer(&mcp.Implementation{
+		Name:    "test-server",
+		Version: "1.0.0",
+	}, nil)
+
+	p := &Platform{
+		mcpServer:       mcpServer,
+		toolkitRegistry: reg,
+		config: &Config{
+			Server: ServerConfig{
+				Description: "Test.",
+				Prompts: []PromptConfig{
+					{
+						Name:        "my-prompt",
+						Description: "My prompt",
+						Content:     "Do the thing about {topic}.",
+						Arguments: []PromptArgumentConfig{
+							{Name: "topic", Description: "The topic", Required: true},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	p.registerPlatformPrompts()
+
+	infos := p.allPromptInfos()
+
+	data, err := json.Marshal(infos)
+	require.NoError(t, err)
+
+	jsonStr := string(data)
+	assert.Contains(t, jsonStr, `"content"`, "JSON output must include content field")
+	assert.Contains(t, jsonStr, "Do the thing about {topic}.", "JSON output must include prompt template text")
+
+	// Workflow prompts should also have content in the JSON
+	for _, info := range infos {
+		if info.Category == "workflow" {
+			assert.NotEmpty(t, info.Content, "workflow prompt %q must have content", info.Name)
+		}
+	}
+}
+
 func TestCollectToolkitPromptInfos(t *testing.T) {
 	reg := registry.NewRegistry()
 	_ = reg.Register(&mockToolkitWithPrompts{

pkg/toolkits/knowledge/toolkit.go

@@ -788,11 +788,13 @@ func (*Toolkit) PromptInfos() []registry.PromptInfo {
 			Name:        promptName,
 			Description: "Guidance on when and how to capture domain knowledge insights",
 			Category:    "toolkit",
+			Content:     knowledgeCapturePrompt,
 		},
 		{
 			Name:        userPromptName,
 			Description: "Record insights from this conversation for data catalog improvement",
 			Category:    "toolkit",
+			Content:     captureKnowledgePromptContent,
 		},
 	}
 }

pkg/toolkits/portal/toolkit.go

@@ -192,11 +192,13 @@ func (*Toolkit) PromptInfos() []registry.PromptInfo {
 			Name:        saveAssetPromptName,
 			Description: "Save an artifact from this conversation as a viewable, shareable asset",
 			Category:    "toolkit",
+			Content:     saveAssetPromptContent,
 		},
 		{
 			Name:        showAssetsPromptName,
 			Description: "Browse your saved artifacts and assets",
 			Category:    "toolkit",
+			Content:     showAssetsPromptContent,
 		},
 	}
 }