Add embedded prompt registry

internal/framework/prompt/render.go

@@ -0,0 +1,28 @@
+package prompt
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+)
+
+// RenderUserSystem renders the system and user prompt pair for promptID.
+func RenderUserSystem(promptID string, data any) (system string, user string, metadata Metadata, err error) {
+	trimmedID := strings.TrimSpace(promptID)
+	compiled, ok := promptRegistry[trimmedID]
+	if !ok {
+		return "", "", Metadata{}, fmt.Errorf("unknown prompt id %q", promptID)
+	}
+
+	var systemBuf bytes.Buffer
+	if err := compiled.systemTmpl.Execute(&systemBuf, data); err != nil {
+		return "", "", Metadata{}, fmt.Errorf("render system prompt %q: %w", trimmedID, err)
+	}
+
+	var userBuf bytes.Buffer
+	if err := compiled.userTmpl.Execute(&userBuf, data); err != nil {
+		return "", "", Metadata{}, fmt.Errorf("render user prompt %q: %w", trimmedID, err)
+	}
+
+	return strings.TrimSpace(systemBuf.String()), strings.TrimSpace(userBuf.String()), compiled.metadata, nil
+}