update

backend/config.py

@@ -30,3 +30,4 @@ CLAUDE_CLI = "claude"
 MODEL_GUIDE = "claude-opus-4-8"
 MODEL_BAUSTEIN_GEN = "claude-sonnet-4-6"
 MODEL_BAUSTEIN_REWORK = "claude-sonnet-4-6"
+MODEL_CHAT = "claude-sonnet-4-6"

backend/generator.py

@@ -16,6 +16,7 @@ from config import (
     MODEL_GUIDE,
     MODEL_BAUSTEIN_GEN,
     MODEL_BAUSTEIN_REWORK,
+    MODEL_CHAT,
     STORAGE_DIR,
 )
 from database import (
@@ -556,6 +557,48 @@ def _build_topic_suggest_prompt(problem: str, existing_topics: list[str]) -> str
     return template.replace("{problem}", problem).replace("{existing}", existing)
 
 
+def _build_guide_chat_prompt(topic: str, format_name: str, section: str, outline: str, messages: list[dict]) -> str:
+    transcript = "\n".join(
+        f"{'Nutzer' if m.get('role') == 'user' else 'Assistent'}: {m.get('content', '')}"
+        for m in messages
+    )
+    outline_block = outline.strip() or "(keine)"
+    section_block = section.strip() or "(kein Abschnitt erkannt)"
+    return f"""Du bist ein hilfreicher Tutor zum Lern-Guide "{topic}" (Format: {format_name}). Ein Leser stellt dir Fragen, während er den Guide liest.
+
+GLIEDERUNG DES GUIDES:
+{outline_block}
+
+AKTUELLER ABSCHNITT, DEN DER LESER GERADE LIEST:
+{section_block}
+
+BISHERIGER CHAT-VERLAUF:
+{transcript}
+
+Antworte als Assistent auf die letzte Nutzer-Nachricht.
+
+WICHTIG – Antwortstil:
+- KURZ und EINFACH: 1–3 Sätze, klare Sprache.
+- Keine Einleitung, keine Wiederholung der Frage, kein Markdown-Drumherum.
+- Beantworte nur die Frage; nutze den Abschnitt und die Gliederung als Kontext.
+
+Gib NUR die Antwort aus, kein Präfix wie "Assistent:"."""
+
+
+async def chat_with_guide(topic: str, format_name: str, section: str, outline: str, messages: list[dict]) -> str:
+    try:
+        prompt = _build_guide_chat_prompt(topic, format_name, section, outline, messages)
+        returncode, stdout, stderr = await _run_claude(
+            "chat-" + str(uuid.uuid4()), prompt, 120, tools=None, model=MODEL_CHAT
+        )
+        if returncode != 0:
+            return "Entschuldigung, das hat nicht geklappt. Bitte versuche es erneut."
+        reply = stdout.strip()
+        return reply or "Entschuldigung, ich habe keine Antwort erhalten."
+    except Exception:
+        return "Entschuldigung, das hat nicht geklappt. Bitte versuche es erneut."
+
+
 async def suggest_topics(problem: str, existing_topics: list[str] | None = None) -> list[dict]:
     try:
         prompt = _build_topic_suggest_prompt(problem, existing_topics or [])

backend/models.py

@@ -75,3 +75,18 @@ class TopicSuggestRequest(BaseModel):
 class TopicSuggestion(BaseModel):
     title: str
     reason: str
+
+
+class ChatMessage(BaseModel):
+    role: Literal["user", "assistant"]
+    content: str = Field(min_length=1, max_length=8000)
+
+
+class GuideChatRequest(BaseModel):
+    section: str = Field(default="", max_length=20000)
+    outline: str = Field(default="", max_length=8000)
+    messages: list[ChatMessage] = Field(min_length=1)
+
+
+class GuideChatResponse(BaseModel):
+    reply: str

backend/routes.py

@@ -11,11 +11,12 @@ from database import (
     create_baustein as db_create_baustein, list_bausteine, get_baustein, delete_baustein as db_delete_baustein,
     list_suggestions, get_suggestion, update_suggestion, delete_suggestion,
 )
-from generator import generate_guide, rework_guide, cancel_guide, generate_suggestions, generate_baustein_detail, rework_baustein, sort_bausteine, suggest_topics, is_suggestions_generating, is_sorting
+from generator import generate_guide, rework_guide, cancel_guide, generate_suggestions, generate_baustein_detail, rework_baustein, sort_bausteine, suggest_topics, chat_with_guide, is_suggestions_generating, is_sorting
 from models import (
     GuideCreateRequest, GuideReworkRequest, GuideResponse,
     BausteinCreateRequest, BausteinReworkRequest, BausteinSortRequest, BausteinResponse, SuggestionResponse,
     TopicSuggestRequest, TopicSuggestion,
+    GuideChatRequest, GuideChatResponse,
 )
 from paths import final_paths
 
@@ -89,6 +90,18 @@ async def rework(guide_id: str, req: GuideReworkRequest):
     return {"ok": True}
 
 
+@router.post("/guides/{guide_id}/chat", response_model=GuideChatResponse)
+async def guide_chat(guide_id: str, req: GuideChatRequest):
+    guide = await get_guide(guide_id)
+    if guide is None:
+        raise HTTPException(404, "Guide nicht gefunden")
+    reply = await chat_with_guide(
+        guide["topic"], guide["format"], req.section, req.outline,
+        [m.model_dump() for m in req.messages],
+    )
+    return {"reply": reply}
+
+
 @router.post("/guides/{guide_id}/cancel")
 async def cancel(guide_id: str):
     cancelled = await cancel_guide(guide_id)