Add management command to rename conversations

Conversations with >10 messages get an LLM-generated summary title.
Conversations with <=10 messages get the first user message truncated
to 100 chars. Supports --dry-run for previewing changes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/rename_conversations.py

@@ -0,0 +1,97 @@
+#!/usr/bin/env python3
+"""
+Management command to rename all conversations.
+
+- Conversations with >10 messages: renamed to an LLM-generated summary
+- Conversations with <=10 messages: renamed to a truncation of the first user message
+"""
+
+import argparse
+import asyncio
+import os
+
+from tortoise import Tortoise
+
+from blueprints.conversation.models import Conversation, Speaker
+from llm import LLMClient
+
+
+async def rename_conversations(dry_run: bool = False):
+    """Rename all conversations based on message count."""
+
+    database_url = os.getenv("DATABASE_URL", "sqlite://raggr.db")
+    await Tortoise.init(
+        db_url=database_url,
+        modules={
+            "models": [
+                "blueprints.users.models",
+                "blueprints.conversation.models",
+            ]
+        },
+    )
+
+    try:
+        llm = LLMClient()
+        conversations = await Conversation.all().prefetch_related("messages")
+
+        renamed = 0
+        skipped = 0
+
+        for conversation in conversations:
+            messages = sorted(conversation.messages, key=lambda m: m.created_at)
+            user_messages = [m for m in messages if m.speaker == Speaker.USER]
+
+            if not user_messages:
+                skipped += 1
+                continue
+
+            if len(messages) > 10:
+                # Summarize via LLM
+                message_text = "\n".join(
+                    f"{m.speaker.value}: {m.text}" for m in messages[:30]
+                )
+                new_name = llm.chat(
+                    prompt=message_text,
+                    system_prompt=(
+                        "You are naming a conversation. Given the messages below, "
+                        "produce a short, descriptive title (max 8 words). "
+                        "Reply with ONLY the title, nothing else."
+                    ),
+                )
+                new_name = new_name.strip().strip('"').strip("'")[:100]
+            else:
+                # Truncate first user message
+                new_name = user_messages[0].text[:100]
+
+            old_name = conversation.name
+            if old_name == new_name:
+                skipped += 1
+                continue
+
+            if dry_run:
+                print(f"  [dry-run] '{old_name}' -> '{new_name}'")
+            else:
+                conversation.name = new_name
+                await conversation.save()
+                print(f"  '{old_name}' -> '{new_name}'")
+
+            renamed += 1
+
+        print(f"\nRenamed: {renamed}  Skipped: {skipped}")
+        if dry_run:
+            print("(dry run — no changes were saved)")
+    finally:
+        await Tortoise.close_connections()
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(
+        description="Rename conversations based on message count"
+    )
+    parser.add_argument(
+        "--dry-run",
+        action="store_true",
+        help="Preview renames without saving",
+    )
+    args = parser.parse_args()
+    asyncio.run(rename_conversations(dry_run=args.dry_run))