odysseus-dev/odysseus · error · HTTPException

Not enough messages to compact

Error message

Not enough messages to compact

What it means

Error "Not enough messages to compact" thrown in odysseus-dev/odysseus.

Source

Thrown at routes/session_routes.py:976

            finally:
                db.close()

        except KeyError:
            raise HTTPException(404, f"Session {session_id} not found")

    @router.post("/session/{session_id}/compact")
    async def compact_session(request: Request, session_id: str):
        """Summarize older messages into one compacted history entry."""
        _verify_session_owner(request, session_id)
        try:
            session = session_manager.get_session(session_id)
        except KeyError:
            raise HTTPException(404, f"Session {session_id} not found")
        _reject_compact_during_active_run(session_id)

        history = list(session.history or [])
        if len(history) < 6:
            raise HTTPException(400, "Not enough messages to compact")

        # Keep a small recent tail verbatim. The prior half-chat/20-message
        # tail made manual compaction look like it did nothing on normal chats.
        recent_keep = min(8, max(4, len(history) // 4))
        older = history[:-recent_keep]
        recent = history[-recent_keep:]
        if not older:
            raise HTTPException(400, "Nothing old enough to compact")

        from src.context_compactor import SELF_SUMMARY_SYSTEM_PROMPT
        from src.endpoint_resolver import resolve_endpoint
        from src.llm_core import llm_call_async

        owner = getattr(session, "owner", None) or effective_user(request)
        url, model, headers = resolve_endpoint("utility", owner=owner)
        if not url or not model:
            url, model, headers = session.endpoint_url, session.model, session.headers
        if not url or not model:

View on GitHub (pinned to f9235ebbf1)

Solutions

1. Add more messages to the session before compacting.
2. Compaction only makes sense for longer conversations.

When it happens

Trigger: Triggered when the corresponding server-side validation or runtime check at the recorded location rejects the request or operation and returns this error message to the caller.

Common situations: See trigger scenarios.

AI-assisted analysis of odysseus-dev/odysseus@f9235ebbf1 (2026-08-14). Data as JSON: /api/errors/2be3a6b79d15a8e6. Report an issue: GitHub.