# `src/models.py` — Data Models

[Top](../Readme.md) | [Architecture](guide_architecture.md) | [MMA](guide_mma.md) | [App Controller](guide_app_controller.md)

---

## Overview

`src/models.py` (~132KB) is the **centralized data model registry**. It defines every data structure used across the app — Tickets, Tracks, Personas, Presets, Discussion entries, Context files, etc. — using `pydantic` and `dataclasses`.

The file exists to **eliminate redundant model definitions** scattered across modules. It also serves as the single source of truth for serialization (TOML, JSON-L, Markdown).

---

## Design Principles

1. **One place to look for any data structure**: If you need to know what fields a `Ticket` has, look here.
2. **Strict types**: `pydantic` for fields with validation, `dataclasses` for internal structures.
3. **No business logic**: Models are pure data. Methods like `to_toml()` are allowed; methods like `execute()` are not.
4. **SDM tags**: Every model has `[C: ...]` (callers) and `[M: ...]` (mutators) tags in docstrings for AI-assisted impact analysis.

---

## Model Categories

The file is organized into regions:

```python
#region: Core Models
#endregion: Core Models

#region: AI Models
#endregion: AI Models

#region: Preset Models
#endregion: Preset Models

#region: Persona Models
#endregion: Persona Models

#region: Context Models
#endregion: Context Models

#region: MMA Models
#endregion: MMA Models

#region: UI State Models
#endregion: UI State Models

#region: Logging Models
#endregion: Logging Models
```

### `Provider`, `ModelInfo` — AI Models

```python
class Provider(str, Enum):
    GEMINI = "gemini"
    ANTHROPIC = "anthropic"
    DEEPSEEK = "deepseek"
    MINIMAX = "MiniMax"
    GEMINI_CLI = "gemini-cli"

@dataclass
class ModelInfo:
    name: str
    provider: Provider
    context_window: int
    max_output_tokens: int
    supports_caching: bool = False
    cost_per_1k_input: float = 0.0
    cost_per_1k_output: float = 0.0
```

These back the AI Settings panel and the cost tracker.

### `DiscussionEntry`, `Message` — Discussion History

```python
@dataclass
class Message:
    role: Literal["user", "assistant", "system", "tool"]
    content: str
    timestamp: float
    metadata: dict[str, Any] = field(default_factory=dict)

@dataclass
class DiscussionEntry:
    entry_id: str
    messages: list[Message]
    is_take_root: bool = False  # First message of a "take" (timeline branch)
    parent_take_id: str | None = None
    metadata: dict[str, Any] = field(default_factory=dict)
```

Discussion history is a list of `DiscussionEntry` objects, each containing one or more `Message` objects. The branching structure supports "takes" (alternative timeline branches).

### `ContextFileEntry`, `ContextScreenshot` — Context

```python
class ViewMode(str, Enum):
    FULL = "full"
    SUMMARIZE = "summarize"
    SKELETON = "skeleton"
    OUTLINE = "outline"
    NONE = "none"

@dataclass
class ContextFileEntry:
    path: str  # Absolute or relative to project root
    view_mode: ViewMode = ViewMode.FULL
    annotations: list[Annotation] = field(default_factory=list)
    fuzzy_slice: FuzzySlice | None = None  # Optional line range

@dataclass
class ContextScreenshot:
    path: str  # Absolute path to image
    caption: str = ""
```

Context is a composition of files + screenshots, each with optional view mode and line-range slicing.

### `FuzzySlice`, `Annotation` — Visual Slice Editor

```python
@dataclass
class FuzzySlice:
    start_anchor: str  # Fuzzy-matched string
    end_anchor: str
    start_offset: int = 0
    end_offset: int = 0
    fallback_start_line: int | None = None
    fallback_end_line: int | None = None

@dataclass
class Annotation:
    kind: Literal["tag", "comment"]
    text: str
    line_range: tuple[int, int] | None = None
```

Fuzzy slices use **anchor-based matching** to survive code modifications. If `start_anchor` shifts due to edits, the slice re-anchors on the next render.

See **[docs/guide_context_curation.md](guide_context_curation.md)** for the full Visual Slice Editor.

### `Ticket`, `Track`, `WorkerContext` — MMA

```python
class TicketStatus(str, Enum):
    PENDING = "pending"
    RUNNING = "running"
    DONE = "done"
    BLOCKED = "blocked"
    SKIPPED = "skipped"

class TicketPriority(str, Enum):
    HIGH = "high"
    MEDIUM = "medium"
    LOW = "low"

@dataclass
class Ticket:
    ticket_id: str
    title: str
    description: str
    status: TicketStatus = TicketStatus.PENDING
    priority: TicketPriority = TicketPriority.MEDIUM
    depends_on: list[str] = field(default_factory=list)
    blocks: list[str] = field(default_factory=list)
    files_involved: list[str] = field(default_factory=list)
    persona: str | None = None
    result: dict | None = None
    error: str | None = None
    commit_sha: str | None = None

@dataclass
class Track:
    track_id: str
    title: str
    description: str
    tickets: list[Ticket]
    plan_path: str
    created_at: float
    checkpoints: list[TrackCheckpoint] = field(default_factory=list)

@dataclass
class TrackCheckpoint:
    sha: str
    phase: str
    timestamp: float
    note: str

@dataclass
class WorkerContext:
    """The minimal context slice given to a tier3-worker sub-agent."""
    ticket_id: str
    track_id: str
    persona: str | None
    focus_files: list[str]
    skeleton_views: dict[str, str]  # path -> skeleton string
    history: list[Message]  # Recent messages from the parent
    conductor_notes: str
```

`WorkerContext` is the **Token Firewall** boundary: this is exactly what each Tier 3 worker sees. It includes only the focus files, their skeletons, and recent history. The parent agent's full state is never visible.

### `Persona`, `Preset`, `ContextPreset`, `ToolPreset` — Configuration

```python
@dataclass
class Persona:
    name: str
    model: str | None = None
    system_prompt: str | None = None
    tool_weights: dict[str, int] = field(default_factory=dict)  # tool_name -> 1..5
    parameter_biases: dict[str, Any] = field(default_factory=dict)
    bias_profile: str | None = None
    tier_assignments: dict[str, str] = field(default_factory=dict)  # tier -> persona_name
    description: str = ""

@dataclass
class Preset:
    name: str
    base_prompt: str
    user_instructions: str
    full_text: str  # base_prompt + user_instructions
    temperature: float = 0.7
    top_p: float = 0.95
    max_output_tokens: int = 8192
    is_foundation: bool = False  # True for the foundational base prompt

@dataclass
class ContextPreset:
    name: str
    files: list[ContextFileEntry]
    screenshots: list[ContextScreenshot]
    description: str = ""
    last_validated: float = 0.0

@dataclass
class ToolPreset:
    name: str
    enabled_tools: dict[str, bool] = field(default_factory=dict)  # tool_name -> enabled
    weights: dict[str, int] = field(default_factory=dict)  # tool_name -> 1..5
    parameter_biases: dict[str, Any] = field(default_factory=dict)
    bias_profile: str | None = None
    description: str = ""
```

Personas consolidate **everything an agent needs** into a single named entity. Presets are simpler — just system prompt + parameters.

### `CommsLogEntry`, `LogEntry` — Logging

```python
@dataclass
class CommsLogEntry:
    timestamp: float
    source: str  # "main", "tier3-worker", "tier4-qa"
    role: str  # "user", "assistant", "system"
    payload_type: str  # "prompt", "response", "tool_call", "tool_result"
    content: str
    metadata: dict[str, Any] = field(default_factory=dict)
    ticket_id: str | None = None

@dataclass
class LogEntry:
    timestamp: float
    level: Literal["DEBUG", "INFO", "WARNING", "ERROR"]
    message: str
    source: str  # Module or subsystem name
    context: dict[str, Any] = field(default_factory=dict)
```

Comms logs are append-only and stored as JSON-L. They are the **primary debugging surface** for AI interactions.

### `UIPerformanceSnapshot`, `DiagnosticEntry` — Diagnostics

```python
@dataclass
class UIPerformanceSnapshot:
    timestamp: float
    fps: float
    frame_time_ms: float
    cpu_pct: float
    input_lag_ms: float

@dataclass
class DiagnosticEntry:
    timestamp: float
    component: str  # "DAG Engine", "Aggregation", "Panel:Command Palette"
    hit_count: int
    total_latency_ms: float
    peak_latency_ms: float
    min_latency_ms: float
```

Diagnostics power the **Performance Diagnostics** panel (FPS, Frame Time, CPU, plus per-component hit counts and latencies).

### `HookRequest`, `HookResponse` — Hook API

```python
@dataclass
class HookRequest:
    action: str  # "click", "set_value", "custom_callback", etc.
    item: str | None = None
    value: Any = None
    callback: str | None = None
    args: list[Any] = field(default_factory=list)
    kwargs: dict[str, Any] = field(default_factory=dict)

@dataclass
class HookResponse:
    status: Literal["ok", "error", "queued", "rejected"]
    message: str = ""
    data: dict[str, Any] = field(default_factory=dict)
```

### `WorkspaceProfile`, `LayoutPreset` — Layouts

```python
@dataclass
class WorkspaceProfile:
    name: str
    scope: Literal["global", "project"]
    docking_layout: str  # ImGui ini-string
    window_visibility: dict[str, bool] = field(default_factory=dict)
    panel_state: dict[str, dict] = field(default_factory=dict)
    auto_switch_triggers: list[str] = field(default_factory=list)
    description: str = ""

@dataclass
class LayoutPreset:
    name: str
    multi_viewport_state: dict[str, Any] = field(default_factory=dict)
    description: str = ""
```

### `RAGConfig`, `RAGChunk`, `RAGResult` — RAG

```python
@dataclass
class RAGConfig:
    enabled: bool = False
    source: Literal["chromadb", "external_mcp"] = "chromadb"
    embedding_provider: str = "gemini-embedding-001"
    chunk_size: int = 512
    chunk_overlap: int = 64
    top_k: int = 5
    external_mcp_server: str | None = None

@dataclass
class RAGChunk:
    text: str
    source_path: str
    start_line: int
    end_line: int
    embedding: list[float] = field(default_factory=list)

@dataclass
class RAGResult:
    chunks: list[RAGChunk]
    query: str
    distance_threshold: float = 0.0
```

---

## Constants

The file also defines several module-level constants used across the app:

```python
# Provider routing
PROVIDERS: list[str] = ["gemini", "anthropic", "deepseek", "MiniMax", "gemini-cli"]

# Tool categories (for Tool Bias)
TOOL_CATEGORIES: list[str] = [
    "File I/O",
    "Python AST",
    "C/C++ AST",
    "Analysis",
    "Network",
    "Runtime",
    "Beads",
]

# MMA tier -> default persona
DEFAULT_TIER_PERSONAS: dict[str, str] = {
    "tier1": "orchestrator",
    "tier2": "tech-lead",
    "tier3": "worker",
    "tier4": "qa",
}

# AGENT_TOOL_NAMES — the canonical list of all 45 tool names
AGENT_TOOL_NAMES: list[str] = [
    "read_file", "list_directory", "search_files", "get_file_summary",
    "get_file_slice", "set_file_slice", "edit_file",
    # ... all 45 ...
]
```

These constants eliminate the **scattered list definitions** problem — every module imports the same source of truth.

---

## Serialization

Models use a mix of strategies:
- **`pydantic` models**: For TOML round-trip with validation (Persona, Preset, ContextPreset, ToolPreset, WorkspaceProfile, RAGConfig).
- **`dataclasses.asdict()`**: For JSON-L logging (CommsLogEntry, LogEntry, DiscussionEntry, Message).
- **Custom tomli-w / tomllib**: For the modules that need precise control over TOML output ordering.

Most serialization is done by the **manager classes** (PresetManager, PersonaManager, etc.) — the model itself is pure data.

---

## Validation

`pydantic` validators enforce constraints:

```python
class Preset(BaseModel):
    name: str = Field(..., min_length=1, max_length=64)
    temperature: float = Field(0.7, ge=0.0, le=2.0)
    top_p: float = Field(0.95, ge=0.0, le=1.0)
    max_output_tokens: int = Field(8192, ge=1, le=200000)

    @validator('name')
    def name_must_be_safe(cls, v):
        if '/' in v or '\\' in v:
            raise ValueError("name cannot contain path separators")
        return v
```

Validators run on load and on save. The managers call `.model_dump()` / `Preset.parse_obj(dict)` to round-trip.

---

## The `parse_plan_md` Function

A critical utility that converts a markdown plan file to `Track` and `Ticket` objects:

```python
def parse_plan_md(plan_path: Path) -> list[Ticket]:
    """Parse a plan.md file into a list of Ticket objects."""
    text = plan_path.read_text(encoding="utf-8")
    tickets = []
    current_phase = None
    for line in text.splitlines():
        line = line.rstrip()
        if not line:
            continue
        # Phase heading
        if line.startswith("# "):
            current_phase = line[2:].strip()
            continue
        # Ticket line
        m = re.match(r'^\s*-\s*\[(.)\]\s*(.+?)(?:\s*\[depends:\s*([^\]]+)\])?\s*$', line)
        if not m:
            continue
        marker, rest, deps = m.groups()
        status = {" ": "pending", "~": "running", "x": "done", "!": "blocked"}.get(marker, "pending")
        # Split rest into ticket_id and title
        id_match = re.match(r'(\S+):\s*(.+)', rest)
        if id_match:
            tid, title = id_match.groups()
        else:
            tid, title = rest, rest
        tickets.append(Ticket(
            ticket_id=tid.strip(),
            title=title.strip(),
            description="",
            status=TicketStatus(status),
            depends_on=[d.strip() for d in (deps or "").split(",") if d.strip()],
        ))
    return tickets
```

The DAG engine uses the returned `Ticket` objects to build the dependency graph.

---

## The `AppState` Class

A separate large dataclass that aggregates all GUI-visible state. **Lives in `src/app_controller.py`**, not here, because it holds the controller's runtime state (not a pure data model). But it follows the same conventions (typed fields, no methods, SDM tags).

---

## How Models Are Used

### In `src/presets.py`

```python
def save_preset(preset: Preset) -> None:
    data = preset.model_dump()
    tomli_w.dump(data, open(self.presets_path, "wb"))
```

### In `src/ai_client.py`

```python
def send(self, request: AIRequest) -> AIResponse:
    """Sends a request. AIRequest is defined in models.py."""
```

### In `src/multi_agent_conductor.py`

```python
def load_track(self, track_id: str) -> Track:
    tickets = parse_plan_md(plan_path)
    return Track(
        track_id=track_id,
        title=...,
        tickets=tickets,
        plan_path=str(plan_path),
        created_at=time.time(),
    )
```

---

## Testing

Models are tested for:
- **Round-trip serialization** (`to_toml` → `from_toml` → equal)
- **Validation** (invalid values rejected)
- **Default values** (all fields have sensible defaults)
- **Field types** (TypeScript-like strict checking via `pydantic`)

Tests live in `tests/test_models.py` and module-specific test files (e.g., `tests/test_preset_manager.py` exercises the `Preset` model).

---

## Adding a New Model

1. Add the model to the appropriate region block in `src/models.py`.
2. Add validators if any fields have constraints.
3. Add a docstring with `[C: ...]` (callers) and `[M: ...]` (mutators) SDM tags.
4. If the model is persisted, write a `to_<format>()` / `from_<format>()` pair in the relevant manager.
5. Add tests in `tests/test_models.py` (round-trip + validation).
6. Update `docs/guide_models.md` (this file) to document the new model.

---

## See Also

- **[guide_architecture.md](guide_architecture.md)** — How models flow through the system
- **[guide_app_controller.md](guide_app_controller.md)** — `AppState` and controller-owned models
- **[guide_mma.md](guide_mma.md)** — `Ticket`, `Track`, `WorkerContext` usage in MMA
- **[guide_personas.md](guide_personas.md)** — `Persona` model in detail
- **[guide_workspace_profiles.md](guide_workspace_profiles.md)** — `WorkspaceProfile` model in detail
- **[guide_rag.md](guide_rag.md)** — `RAGConfig`, `RAGChunk`, `RAGResult` models
- **[guide_context_aggregation.md](guide_context_aggregation.md)** — How the `FileItem` and `ContextPreset` schemas flow through the `aggregate.py` pipeline
- **[guide_discussions.md](guide_discussions.md)** — The entry dict shape (`{role, content, collapsed, ts, ...}`) consumed by `parse_history_entries`
- **`src/presets.py`, `src/personas.py`, `src/context_presets.py`, `src/tool_presets.py`** — Managers that use these models
- **`src/multi_agent_conductor.py`** — Uses `Ticket`, `Track`, `WorkerContext`
- **[conductor/tracks/nagent_review_20260608/report.md §6](../conductor/tracks/nagent_review_20260608/report.md)** — Deep-dive on the `FileItem` schema as Manual Slop's strongest curation dimension
- **`src/ai_client.py`** — Uses `Provider`, `ModelInfo`, `AIRequest`, `AIResponse`