panic: invalid memory address in Agent.saveCurrentConversation when LongTermMemory is enabled

LocalAGI crashes with a panic: runtime error: invalid memory address or nil pointer dereference in core/agent/knowledgebase.go when an agent has LongTermMemory=true.

The crash happens right after the agent successfully returns a response and tries to save the conversation to LocalRecall.

• LocalAGI: built from main
  • git log -1 --oneline → cbe4cd6 (HEAD -> main, origin/main, origin/HEAD) fix: correct API url
• Deployment: Docker Compose on WSL2 Ubuntu 24.04 (Windows 11 host)
• GPU: NVIDIA RTX 3060 (using CUDA image for LocalAI)
• Docker services (from docker-compose.yaml):

services:
  localai:
    image: localai/localai:master
    ports:
      - "8081:8080"
    environment:
      - DEBUG=true
    volumes:
      - ./volumes/models:/models
      - backends:/backends
      - images:/tmp/generated/images

  localrecall-postgres:
    image: quay.io/mudler/localrecall:${LOCALRECALL_VERSION:-v0.5.2}-postgresql
    environment:
      - POSTGRES_DB=localrecall
      - POSTGRES_USER=localrecall
      - POSTGRES_PASSWORD=localrecall
    ports:
      - "5432:5432"
    volumes:
      - postgres_data:/var/lib/postgresql/data

  localrecall:
    image: quay.io/mudler/localrecall:${LOCALRECALL_VERSION:-v0.5.2}
    depends_on:
      localrecall-postgres:
        condition: service_healthy
      localai:
        condition: service_started
    ports:
      - "8080"
    environment:
      - DATABASE_URL=postgresql://localrecall:localrecall@localrecall-postgres:5432/localrecall?sslmode=disable
      - VECTOR_ENGINE=postgres
      - EMBEDDING_MODEL=granite-embedding-107m-multilingual
      - FILE_ASSETS=/assets
      - OPENAI_API_KEY=sk-1234567890
      - OPENAI_BASE_URL=http://localai:8080
      - HYBRID_SEARCH_BM25_WEIGHT=0.5
      - HYBRID_SEARCH_VECTOR_WEIGHT=0.5
    volumes:
      - localrag_assets:/assets

  localagi:
    # built from Dockerfile.webui
    build:
      context: .
      dockerfile: Dockerfile.webui
    depends_on:
      localai:
        condition: service_healthy
      localrecall-healthcheck:
        condition: service_completed_successfully
      dind:
        condition: service_healthy
    ports:
      - "8080:3000"
    environment:
      - LOCALAGI_MODEL=${MODEL_NAME:-gemma-3-4b-it-qat}
      - LOCALAGI_MULTIMODAL_MODEL=${MULTIMODAL_MODEL:-moondream2-20250414}
      - LOCALAGI_IMAGE_MODEL=${IMAGE_MODEL:-Z-Image-Turbo}
      - LOCALAGI_LLM_API_URL=http://localai:8080
      - LOCALAGI_LOCALRAG_URL=http://localrecall:8080
      - LOCALAGI_STATE_DIR=/pool
      - LOCALAGI_TIMEOUT=5m
      - LOCALAGI_ENABLE_CONVERSATIONS_LOGGING=false
      - LOCALAGI_SSHBOX_URL=root:root@sshbox:22
      - DOCKER_HOST=tcp://dind:2375
    volumes:
      - localagi_pool:/pool
     
http server started on 8080
...
status=200 ... host=localrecall:8080


Agent configuration
Created from the WebUI (http://localhost:8080/app):

Name: Nemo-Reasoning

Model: mistral-nemo-2407-local (served by LocalAI on http://localai:8080)

Multimodal model: granite-embedding-107m-multilingual

API URL: http://localai:8080

Local RAG URL (in Model Settings): http://localrecall:8080

Memory Settings:

Long-term Memory: ON

Summary Long-term Memory: OFF

Knowledge Base: OFF (or ON, crash happens even when KB is disabled)

From the logs, the agent config is printed as:

LongTermMemory=true
SummaryLongTermMemory=false
EnableKnowledgeBase=false
LocalRAGURL=http://localrecall:8080
...
time=2026-02-06T10:34:32.649Z level=INFO msg="Saving conversation" agent=Nemo-Reasoning conversation_size=2 source.file=work/core/agent/knowledgebase.go source.L131
time=2026-02-06T10:34:32.649Z level=DEBUG msg="Agent has finished" agent=Nemo-Reasoning source.file=work/core/agent/agent.go source.L197
time=2026-02-06T10:34:32.649Z level=INFO msg="Response from agent" agent=Nemo-Reasoning response="Hi there! It's great to meet you. What brings you here today? ..." source.file=work/webui/app.go source.L383

panic: runtime error: invalid memory address or nil pointer dereference
signal SIGSEGV: segmentation violation code=0x1 addr=0x30 pc=0xf314ee

goroutine 45 [running]:
github.com/mudler/LocalAGI/core/agent.(*Agent).saveCurrentConversation(0xc000308b40, 0xc000723a40, 0x2, 0xc0002d62d0?)
    work/core/agent/knowledgebase.go:147 +0x36e
github.com/mudler/LocalAGI/core/agent.(*Agent).consumeJob.func6(...)
    work/core/agent/agent.go:1107 +0x28
github.com/mudler/LocalAGI/core/types.JobResult.Finish(0xc0003aa240, 0x0?, 0x0?)
    work/core/types/result.go:42 +0xe2
github.com/mudler/LocalAGI/core/agent.(*Agent).consumeJob(0xc000308b40, 0xc000102900, 0x1cbbb6f, 0x4)
    work/core/agent/agent.go:1110 +0x1ea5
github.com/mudler/LocalAGI/core/agent.(*Agent).run(0xc000308b40, 0xc0002e8700)
    work/core/agent/agent.go:1309 +0xf2
github.com/mudler/LocalAGI/core/agent.(*Agent).Run.func1(...)
    work/core/agent/agent.go:1287 +0x3a
created by github.com/mudler/LocalAGI/core/agent.(*Agent).Run in goroutine 51
    work/core/agent/agent.go:1286 +0x19b

Start in core/agent/knowledgebase.go at saveCurrentConversation, especially line 147, then trace its caller in core/agent/agent.go around lines 1107-1110. Reproduce with LongTermMemory enabled and LocalRAGURL set to LocalRecall, and inspect the conversation-save path. Done means the agent returns without a nil-pointer panic and the conversation-save behavior is verified.