# Query Flow

This page traces the end-to-end journey of a user query through the OpenJarvis system, from the moment it enters the CLI or SDK to the final response and telemetry recording.

---

## Sequence Diagram

```mermaid
sequenceDiagram
    actor User
    participant CLI as CLI / SDK
    participant CFG as Config & Discovery
    participant LRN as Learning (Router)
    participant AGT as Agent
    participant MEM as Memory Backend
    participant CTX as Context Injection
    participant ENG as Inference Engine
    participant TEL as Telemetry
    participant TRC as Trace Collector

    User->>CLI: jarvis ask "query" / j.ask("query")
    CLI->>CFG: load_config()
    CFG-->>CLI: JarvisConfig (hardware, engine defaults)

    CLI->>CFG: get_engine(config)
    CFG-->>CLI: (engine_key, engine_instance)

    CLI->>CFG: discover_engines() + discover_models()
    CFG-->>CLI: available models per engine

    alt Model not specified
        CLI->>LRN: select_model(RoutingContext)
        LRN-->>CLI: model_key (e.g., "qwen3:8b")
    end

    alt Agent mode (--agent flag)
        CLI->>AGT: agent.run(query, context)
        AGT->>MEM: retrieve(query, top_k=5)
        MEM-->>AGT: RetrievalResult[]
        AGT->>CTX: inject_context(query, messages, backend)
        CTX-->>AGT: messages with context prepended

        loop Tool-calling loop (max_turns)
            AGT->>ENG: generate(messages, model, tools)
            ENG-->>AGT: {content, tool_calls, usage}
            opt Tool calls present
                AGT->>AGT: ToolExecutor.execute(tool_call)
                AGT->>AGT: Append tool results to messages
            end
        end

        AGT-->>CLI: AgentResult(content, tool_results, turns)
    else Direct mode (no agent)
        CLI->>MEM: retrieve(query)
        MEM-->>CLI: RetrievalResult[]
        CLI->>CTX: inject_context(query, messages, backend)
        CTX-->>CLI: messages with context

        CLI->>ENG: instrumented_generate(messages, model)
        ENG-->>CLI: {content, usage}
    end

    CLI->>TEL: TelemetryStore records metrics
    CLI->>TRC: TraceCollector saves Trace
    CLI-->>User: Response text
```

---

## Direct Mode vs Agent Mode

OpenJarvis supports two query processing paths, selected by the `--agent` CLI flag or the `agent` parameter in the SDK.

### Direct Mode (Default)

In direct mode, the query goes straight to the inference engine with optional memory context. This is the simplest path -- one inference call, no tool loop.

```bash
# CLI
jarvis ask "What is the capital of France?"

# SDK
j = Jarvis()
response = j.ask("What is the capital of France?")
```

### Agent Mode

In agent mode, the query is handled by a named agent that can perform multiple inference rounds and invoke tools. The `OrchestratorAgent` is the most common choice, enabling a multi-turn tool-calling loop.

```bash
# CLI
jarvis ask --agent orchestrator --tools calculator,think "What is 2^10 + 3^5?"

# SDK
response = j.ask("What is 2^10 + 3^5?", agent="orchestrator", tools=["calculator"])
```

---

## Step-by-Step Walkthrough

### Step 1: Configuration Loading

The journey begins with loading the system configuration:

```python
config = load_config()  # Reads ~/.openjarvis/config.toml
```

This step:

- Detects system hardware (GPU vendor/model, CPU, RAM)
- Recommends the best inference engine for the detected hardware
- Overlays any user overrides from the TOML file
- Returns a `JarvisConfig` dataclass with all settings

### Step 2: Engine Discovery

Next, the system finds a running inference engine:

```python
resolved = get_engine(config, engine_key)
# Returns (engine_key, engine_instance) or None
```

The discovery process:

1. If a specific engine was requested (`--engine` flag), try that engine
2. Otherwise, try the default engine from config (e.g., `"ollama"`)
3. If the default is unhealthy, probe all registered engines and use the first healthy one
4. If no engine is available, exit with an error message

### Step 3: Model Discovery and Registration

Once an engine is found, the system discovers available models:

```python
register_builtin_models()          # Register known models (catalog)
all_engines = discover_engines(config)
all_models = discover_models(all_engines)
for ek, model_ids in all_models.items():
    merge_discovered_models(ek, model_ids)  # Register runtime-discovered models
```

### Step 4: Model Routing

If no model was explicitly specified, the router policy selects one:

```python
from openjarvis.learning import ensure_registered
from openjarvis.learning.router import build_routing_context
ensure_registered()  # Ensure learning policies are registered

policy_key = router_policy or config.learning.routing.policy
router_cls = RouterPolicyRegistry.get(policy_key)
router = router_cls(
    available_models=all_models.get(engine_name, []),
    default_model=config.intelligence.default_model,
    fallback_model=config.intelligence.fallback_model,
)

ctx = build_routing_context(query_text)
model_name = router.select_model(ctx)
```

The `build_routing_context()` function (in `learning/router.py`) analyzes the query for code patterns, math keywords, length, and urgency. The router then applies its rules (heuristic or learned) to select the optimal model.

### Step 5: Memory Context Injection

If memory context injection is enabled (default: `true`) and the memory backend has indexed documents:

```python
backend = _get_memory_backend(config)
if backend is not None:
    ctx_cfg = ContextConfig(
        top_k=config.memory.context_top_k,        # Default: 5
        min_score=config.memory.context_min_score,  # Default: 0.1
        max_context_tokens=config.memory.context_max_tokens,  # Default: 2048
    )
    messages = inject_context(query_text, messages, backend, config=ctx_cfg)
```

This retrieves relevant chunks from the memory backend and prepends a system message with the retrieved context and source attribution.

!!! tip "Disabling context injection"
    Use `--no-context` on the CLI or `context=False` in the SDK to skip memory context injection.

### Step 6: Inference Generation

**In direct mode**, the query is sent to the engine via the instrumented wrapper:

```python
result = instrumented_generate(
    engine, messages,
    model=model_name,
    bus=bus,
    temperature=temperature,
    max_tokens=max_tokens,
)
```

The `instrumented_generate()` wrapper:

1. Publishes `INFERENCE_START` on the event bus
2. Records the start time
3. Calls `engine.generate()`
4. Records end time, calculates latency
5. Publishes `INFERENCE_END` with timing and token counts
6. Publishes `TELEMETRY_RECORD` with the full `TelemetryRecord`

**In agent mode**, the agent manages inference calls internally, potentially making multiple rounds with tool calls in between.

### Step 7: Tool Execution (Agent Mode Only)

When the `OrchestratorAgent` receives tool calls in the model's response:

1. Each tool call is dispatched to the `ToolExecutor`
2. The executor publishes `TOOL_CALL_START`, executes the tool, publishes `TOOL_CALL_END`
3. Tool results are appended to the message history as `TOOL` messages
4. The updated messages are sent back to the engine for the next round
5. This loop continues until the model responds without tool calls or `max_turns` is reached

### Step 8: Telemetry Recording

After every inference call, a `TelemetryRecord` is created and persisted:

```python
@dataclass(slots=True)
class TelemetryRecord:
    timestamp: float
    model_id: str
    prompt_tokens: int
    completion_tokens: int
    total_tokens: int
    latency_seconds: float
    ttft: float              # Time to first token
    cost_usd: float
    energy_joules: float
    power_watts: float
    engine: str
    agent: str
    metadata: Dict[str, Any]
```

The `TelemetryStore` subscribes to `TELEMETRY_RECORD` events on the EventBus and writes records to `~/.openjarvis/telemetry.db`.

### Step 9: Trace Recording

When a `TraceCollector` is wrapping the agent, a complete `Trace` is built from the events captured during execution:

1. All `INFERENCE_START`/`END` events become `GENERATE` steps
2. All `TOOL_CALL_START`/`END` events become `TOOL_CALL` steps
3. All `MEMORY_RETRIEVE` events become `RETRIEVE` steps
4. A final `RESPOND` step captures the output
5. The trace is saved to the `TraceStore` and `TRACE_COMPLETE` is published

### Step 10: Response Delivery

The final response is delivered to the user:

- **CLI:** Printed to stdout (or as JSON with `--json`)
- **SDK:** Returned as a string from `ask()` or as a dict from `ask_full()`

---

## EventBus Activity During a Query

The following events are published during a typical query in agent mode:

```
AGENT_TURN_START    {agent: "orchestrator", input: "What is 2+2?"}
INFERENCE_START     {model: "qwen3:8b", engine: "ollama", turn: 1}
INFERENCE_END       {model: "qwen3:8b", engine: "ollama", turn: 1}
TELEMETRY_RECORD    {model_id: "qwen3:8b", latency: 0.8, tokens: 150}
TOOL_CALL_START     {tool: "calculator", arguments: {expression: "2+2"}}
TOOL_CALL_END       {tool: "calculator", success: true, latency: 0.01}
INFERENCE_START     {model: "qwen3:8b", engine: "ollama", turn: 2}
INFERENCE_END       {model: "qwen3:8b", engine: "ollama", turn: 2}
TELEMETRY_RECORD    {model_id: "qwen3:8b", latency: 0.5, tokens: 80}
AGENT_TURN_END      {agent: "orchestrator", turns: 2, content_length: 12}
TRACE_COMPLETE      {trace: Trace(...)}
```

---

## SDK Query Flow

The `Jarvis` class in `sdk.py` provides the same query flow through a Python API:

```python
from openjarvis import Jarvis

j = Jarvis(model="qwen3:8b", engine_key="ollama")

# Direct mode
response = j.ask("Hello")

# Agent mode with tools
response = j.ask(
    "What is 2^10?",
    agent="orchestrator",
    tools=["calculator"],
)

# Full result with metadata
result = j.ask_full("Hello")
# {
#     "content": "Hello! How can I help you?",
#     "usage": {"prompt_tokens": 10, "completion_tokens": 15, "total_tokens": 25},
#     "model": "qwen3:8b",
#     "engine": "ollama",
# }

j.close()
```

The SDK handles lazy engine initialization, telemetry setup, memory context injection, and resource cleanup internally. The `ask()` method delegates to `ask_full()` and extracts just the content string.