refactor: replace history transcript format with numbered sections and rename upload file to HISTORY.txt

internal/promptcompat/history_transcript.go

@@ -1,35 +1,108 @@
 package promptcompat
 
 import (
+	"fmt"
 	"strings"
-
-	"ds2api/internal/prompt"
 )
 
-const CurrentInputContextFilename = "history.txt"
+const CurrentInputContextFilename = "HISTORY.txt"
+
+const historyTranscriptTitle = "# HISTORY.txt"
+const historyTranscriptSummary = "Prior conversation history and tool progress."
 
 func BuildOpenAIHistoryTranscript(messages []any) string {
-	return buildOpenAIInjectedFileTranscript(messages)
+	return buildOpenAIHistoryTranscript(messages)
 }
 
 func BuildOpenAICurrentUserInputTranscript(text string) string {
 	if strings.TrimSpace(text) == "" {
 		return ""
 	}
-	return BuildOpenAICurrentInputContextTranscript([]any{
+	return buildOpenAIHistoryTranscript([]any{
 		map[string]any{"role": "user", "content": text},
 	})
 }
 
 func BuildOpenAICurrentInputContextTranscript(messages []any) string {
-	return buildOpenAIInjectedFileTranscript(messages)
+	return buildOpenAIHistoryTranscript(messages)
 }
 
-func buildOpenAIInjectedFileTranscript(messages []any) string {
-	normalized := NormalizeOpenAIMessagesForPrompt(messages, "")
-	transcript := strings.TrimSpace(prompt.MessagesPrepare(normalized))
+func buildOpenAIHistoryTranscript(messages []any) string {
+	if len(messages) == 0 {
+		return ""
+	}
+	var b strings.Builder
+	b.WriteString(historyTranscriptTitle)
+	b.WriteString("\n")
+	b.WriteString(historyTranscriptSummary)
+	b.WriteString("\n\n")
+
+	entry := 0
+	for _, raw := range messages {
+		msg, ok := raw.(map[string]any)
+		if !ok {
+			continue
+		}
+		role := normalizeOpenAIRoleForPrompt(strings.ToLower(strings.TrimSpace(asString(msg["role"]))))
+		content := strings.TrimSpace(buildOpenAIHistoryEntry(role, msg))
+		if content == "" {
+			continue
+		}
+		entry++
+		fmt.Fprintf(&b, "=== %d. %s ===\n%s\n\n", entry, strings.ToUpper(roleLabelForHistory(role)), content)
+	}
+
+	transcript := strings.TrimSpace(b.String())
 	if transcript == "" {
 		return ""
 	}
-	return transcript
+	return transcript + "\n"
+}
+
+func buildOpenAIHistoryEntry(role string, msg map[string]any) string {
+	switch role {
+	case "assistant":
+		return strings.TrimSpace(buildAssistantContentForPrompt(msg))
+	case "tool", "function":
+		return strings.TrimSpace(buildToolHistoryContent(msg))
+	case "system", "user":
+		return strings.TrimSpace(NormalizeOpenAIContentForPrompt(msg["content"]))
+	default:
+		return strings.TrimSpace(NormalizeOpenAIContentForPrompt(msg["content"]))
+	}
+}
+
+func buildToolHistoryContent(msg map[string]any) string {
+	content := strings.TrimSpace(NormalizeOpenAIContentForPrompt(msg["content"]))
+	parts := make([]string, 0, 2)
+	if name := strings.TrimSpace(asString(msg["name"])); name != "" {
+		parts = append(parts, "name="+name)
+	}
+	if callID := strings.TrimSpace(asString(msg["tool_call_id"])); callID != "" {
+		parts = append(parts, "tool_call_id="+callID)
+	}
+	header := ""
+	if len(parts) > 0 {
+		header = "[" + strings.Join(parts, " ") + "]"
+	}
+	switch {
+	case header != "" && content != "":
+		return header + "\n" + content
+	case header != "":
+		return header
+	default:
+		return content
+	}
+}
+
+func roleLabelForHistory(role string) string {
+	role = strings.ToLower(strings.TrimSpace(role))
+	switch role {
+	case "function":
+		return "tool"
+	case "":
+		return "unknown"
+	default:
+		return role
+	}
 }