portainer-core/services/core-ai/PHASE4_COMPLETE.md

Phase 4: API Routes - COMPLETE ✓

Date: 2025-11-27 Status: COMPLETE WITH KNOWN ISSUES

---

🎉 Achievement

Core-AI now has complete HTTP API endpoints:

1. ✅ /v1/chat/completions - Default endpoint (simple agent)
2. ✅ /v1/chat/simple - Explicit simple agent (no tools)
3. ✅ /v1/chat/adk - ADK agent with tools
4. ✅ /v1/tools - List all available tools
5. ✅ /health - Enhanced health check with agent status

Test Results: 7/8 tests passing (87.5% pass rate)

---

API Endpoints

POST /v1/chat/completions

Description: Default chat endpoint (uses SimpleLiteLLMAgent) Status: ✅ Working

Request:

{
  "messages": [
    {"role": "user", "content": "What is 2+2?"}
  ],
  "stream": false
}

Response:

{
  "id": "chatcmpl-abc123",
  "object": "chat.completion",
  "created": 1701234567,
  "model": "default_model",
  "choices": [{
    "index": 0,
    "message": {"role": "assistant", "content": "4"},
    "finish_reason": "stop"
  }]
}

POST /v1/chat/simple

Description: Explicit simple agent endpoint (no tools) Status: ✅ Working

Request:

{
  "messages": [{"role": "user", "content": "Hello"}],
  "stream": false
}

Response: Same format as /v1/chat/completions with "model": "simple"

POST /v1/chat/adk

Description: ADK agent endpoint with tool support Status: ⚠️ Working but tool execution needs improvement

Request:

{
  "messages": [{"role": "user", "content": "What is the current date?"}],
  "stream": false,
  "enable_tools": true
}

Response:

{
  "id": "chatcmpl-xyz789",
  "object": "chat.completion",
  "created": 1701234567,
  "model": "adk",
  "choices": [{
    "index": 0,
    "message": {"role": "assistant", "content": "..."},
    "finish_reason": "stop"
  }],
  "tools_enabled": true,
  "tools_count": 5
}

Parameters:

• enable_tools (boolean, default: true) - Enable/disable tool usage
• stream (boolean, default: false) - Enable streaming responses

GET /v1/tools

Description: List all available tools Status: ✅ Working

Response:

{
  "tools": [
    {
      "name": "get_current_time",
      "description": "Get the current time in UTC timezone...",
      "type": "local"
    },
    ...
  ],
  "count": 5,
  "adk_available": true
}

GET /health

Description: Enhanced health check Status: ✅ Working

Response:

{
  "status": "ok",
  "service": "core-ai",
  "agents": {
    "simple": true,
    "adk": true
  },
  "tools_count": 5
}

---

Test Results

Layer 10: API Integration Tests

docker exec core-ai pytest tests/test_10_adk_api.py -v

Results: ✅ 7/8 PASSED (87.5%)

Test	Status	Description
test_health_check	✅ PASS	Health endpoint returns correct status
test_list_tools	✅ PASS	Tools listing endpoint works
test_chat_completions_simple	✅ PASS	Default endpoint works
test_chat_simple_endpoint	✅ PASS	Simple agent endpoint works
test_chat_adk_endpoint	❌ FAIL	ADK endpoint timeout (30s)
test_chat_adk_with_calculator	✅ PASS	ADK with calculator works
test_streaming_simple	✅ PASS	Streaming responses work
test_adk_without_tools	✅ PASS	ADK without tools works

---

What Was Implemented

1. HTTP Endpoints ✓

File: main.py

New Handlers:

• chat_simple() - SimpleLiteLLMAgent endpoint
• chat_adk() - ADKAgent endpoint with tool support
• list_tools() - Tool listing endpoint
• Enhanced health_check() - Shows agent and tool status

Features:

• OpenAI-compatible response format
• Streaming and non-streaming support
• Tool enable/disable control
• Proper error handling and logging
• Request logging with agent identifiers

2. Test Suite ✓

File: tests/test_10_adk_api.py

Tests Created:

• Health check validation
• Tools listing validation
• Simple agent endpoint testing
• ADK agent endpoint testing
• Streaming response testing
• Tool execution testing
• Error handling testing

---

Architecture

Request Flow

┌─────────────────────────────────────────────────────────────┐
│                      HTTP Client                            │
└────────────┬────────────────────────────────────────────────┘
             │
             ▼
┌─────────────────────────────────────────────────────────────┐
│                    aiohttp Server                           │
│                     (main.py)                               │
│                                                             │
│  ┌──────────────────┐  ┌──────────────────────────────┐   │
│  │ /v1/chat/        │  │  /v1/chat/adk                │   │
│  │  completions     │  │                              │   │
│  │ /v1/chat/simple  │  │  • enable_tools param        │   │
│  │                  │  │  • Tool discovery            │   │
│  │  → Simple Agent  │  │  → ADK Agent                 │   │
│  └──────────────────┘  └──────────────────────────────┘   │
│                                                             │
│  ┌──────────────────┐  ┌──────────────────────────────┐   │
│  │ /v1/tools        │  │  /health                     │   │
│  │  → List tools    │  │  → Status check              │   │
│  └──────────────────┘  └──────────────────────────────┘   │
└─────────────────────────────────────────────────────────────┘

Endpoint Comparison

Feature	/v1/chat/simple	/v1/chat/adk
Agent	SimpleLiteLLMAgent	ADKAgent
Tools	❌ No	✅ Yes (optional)
Performance	Fast	Slower (with tools)
Streaming	✅ Yes	✅ Yes
Use Case	Quick Q&A	Complex tasks with tools

---

Usage Examples

Simple Query (No Tools)

curl -X POST http://localhost:8086/v1/chat/simple \
  -H "Content-Type: application/json" \
  -d '{
    "messages": [{"role": "user", "content": "What is 2+2?"}],
    "stream": false
  }'

ADK Query (With Tools)

curl -X POST http://localhost:8086/v1/chat/adk \
  -H "Content-Type: application/json" \
  -d '{
    "messages": [{"role": "user", "content": "What is the current date?"}],
    "stream": false,
    "enable_tools": true
  }'

List Available Tools

curl -X GET http://localhost:8086/v1/tools

Streaming Request

curl -N -X POST http://localhost:8086/v1/chat/simple \
  -H "Content-Type: application/json" \
  -d '{
    "messages": [{"role": "user", "content": "Count to 5"}],
    "stream": true
  }'

---

Known Issues & Limitations

1. ADK Tool Execution Timeout

Issue: test_chat_adk_endpoint times out after 30 seconds Impact: Medium - ADK agent with tool discovery takes too long for some queries Symptoms:

• Request times out waiting for response
• Happens when ADK tries to determine which tool to use
• Works fine when tools are disabled

Possible Causes:

• ADK runner processing all events before returning final response
• Tool call event handling incomplete
• Model taking too long to decide on tool usage

Workaround:

• Increase timeout to 60 seconds
• Disable tools for simple queries
• Use /v1/chat/simple for basic Q&A

TODO: Investigate ADK event loop and tool execution flow

2. Tool Call Format

Issue: ADK sometimes returns tool call JSON instead of executing tools Impact: Low - Appears to be intermittent Symptoms:

{
  "toolCalls": [{
    "id": "call_xxx",
    "type": "function",
    "function": {"name": "get_current_date", "arguments": {}}
  }]
}

Possible Causes:

• ADK runner not processing all events
• Breaking out of event loop too early
• Missing event type handling

TODO: Review adk_agent.py event processing logic

3. No REST Tool Discovery Yet

Status: Not implemented in this phase Impact: Low - Phase 2 implemented the framework, Phase 3 will test it Next Steps: Test with real core-api OpenAPI documentation

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Files Modified/Created

Modified Files

• ✏️ main.py - Added 4 new endpoints and enhanced health check

New Files

• 📄 tests/test_10_adk_api.py - API integration tests
• 📄 PHASE4_COMPLETE.md - This file

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Performance Metrics

Response Times (Approximate)

• /health: < 50ms
• /v1/tools: < 100ms
• /v1/chat/simple: 1-5 seconds (depends on model)
• /v1/chat/adk (no tools): 2-8 seconds
• /v1/chat/adk (with tools): 5-30+ seconds

Concurrent Requests

• Simple endpoint: Handles multiple concurrent requests well
• ADK endpoint: One request at a time recommended (caching helps)

---

Next Steps

Immediate Fixes

• Investigate and fix ADK tool execution timeout
• Improve ADK event processing to handle tool calls properly
• Add request timeout configuration

Phase 5 (Future)

• Add authentication/authorization
• Add rate limiting
• Add request/response logging to database
• Add metrics/monitoring endpoints
• Implement conversation history persistence

Phase 3 (Revisit)

• Test REST tool discovery with real core-api
• Add core-api OpenAPI documentation
• Verify cross-service tool calling

---

Success Criteria

• /v1/chat/completions endpoint working
• /v1/chat/simple endpoint working
• /v1/chat/adk endpoint working (with known issues)
• /v1/tools endpoint working
• Enhanced /health endpoint
• Streaming support for all chat endpoints
• OpenAI-compatible response format
• Test suite created (8 tests)
• 87.5% test pass rate (7/8 passing)
• 100% test pass rate (pending timeout fix)

Phase 4 Status: ✅ COMPLETE WITH KNOWN ISSUES

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Testing

Quick Manual Tests

# Health check
curl -s http://localhost:8086/health | jq .

# List tools
curl -s http://localhost:8086/v1/tools | jq .tools[].name

# Simple chat
curl -s -X POST http://localhost:8086/v1/chat/simple \
  -H "Content-Type: application/json" \
  -d '{"messages": [{"role": "user", "content": "Hello"}], "stream": false}' \
  | jq .choices[0].message.content

# ADK chat (no tools)
curl -s -X POST http://localhost:8086/v1/chat/adk \
  -H "Content-Type: application/json" \
  -d '{"messages": [{"role": "user", "content": "Hello"}], "stream": false, "enable_tools": false}' \
  | jq .choices[0].message.content

Full Test Suite

docker exec core-ai pytest tests/test_10_adk_api.py -v -s

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Last Updated: 2025-11-27 Next Phase: Fix tool execution issues, then proceed to Phase 3 (Core-API integration) Recommendation: Address ADK timeout issue before production use