# Tool Manifest Specification

> Canonical schema reference for Headquarter's manifest-driven tool registry.
> Version: 1.0.0 — aligned with FN-003.

## Overview

Headquarter is a manifest-driven platform: every containerized tool (OpenCode, code-server, and future tools) is declared by a YAML manifest. The orchestration backend reads these manifests to generate Docker Compose services, Traefik routing labels, volume mounts, and resource constraints.

**Design goal:** Adding a new standard container tool requires only a YAML manifest—no backend code changes.

## Manifest File Format

Manifests are YAML files with a single top-level mapping. They are validated on load by Pydantic v2 models.

### Built-in location

Built-in manifests live in `apps/api/app/tools/manifests/*.yml` and are loaded automatically on API startup.

### Minimal valid manifest

```yaml
id: my-tool
name: My Tool
image: my-org/my-tool:latest
ports:
  - container_port: 8080
    primary: true
traefik:
  enabled: false
```

## Field Reference

### `ToolManifest` (top level)

| Field | Type | Required | Default | Description |
|-------|------|----------|---------|-------------|
| `id` | `string` | yes | — | Lowercase slug with hyphens only (`^[a-z0-9\-]+$`). Used as the registry key. |
| `name` | `string` | yes | — | Human-readable tool name. |
| `description` | `string` | no | `""` | Short description of the tool. |
| `version` | `string` | no | `"1.0.0"` | Manifest version (semver-ish). |
| `image` | `string` | yes | — | Docker image reference. |
| `runtime_command` | `string[] \| null` | no | `null` | Override the container default command. |
| `runtime_entrypoint` | `string[] \| null` | no | `null` | Override the container entrypoint. |
| `runtime_user` | `string \| null` | no | `null` | User to run as inside the container. |
| `runtime_working_dir` | `string \| null` | no | `null` | Working directory inside the container. |
| `ports` | `PortConfig[]` | no | `[]` | Exposed ports. |
| `workspace_mounts` | `MountConfig[]` | no | `[]` | Workspace volume mounts (project-scoped). |
| `config_mounts` | `MountConfig[]` | no | `[]` | Config volume mounts (user or tool-scoped). |
| `env` | `dict<string, string>` | no | `{}` | Static environment variables. |
| `secrets` | `SecretRef[]` | no | `[]` | Secrets injected as environment variables. |
| `health_check` | `HealthCheckConfig \| null` | no | `null` | Health check definition. |
| `resource_limits` | `ResourceLimits \| null` | no | `null` | CPU and memory constraints. |
| `executable` | `ExecutableConfig \| null` | no | `null` | Node.js runtime metadata for executable environments. |
| `traefik` | `TraefikConfig \| null` | no | `null` | Traefik routing configuration. |

### `PortConfig`

| Field | Type | Required | Default | Description |
|-------|------|----------|---------|-------------|
| `container_port` | `int` | yes | — | Port inside the container. Range: 1–65535. |
| `protocol` | `"tcp" \| "udp"` | no | `"tcp"` | Transport protocol. |
| `name` | `string \| null` | no | `null` | Logical name, e.g. `"http"`, `"websocket"`. |
| `primary` | `bool` | no | `false` | The port used for default routing and health checks. |

### `MountConfig`

| Field | Type | Required | Default | Description |
|-------|------|----------|---------|-------------|
| `type` | `"volume" \| "bind"` | no | `"volume"` | Mount type. |
| `source_pattern` | `string` | yes | — | Template pattern resolved at spawn time, e.g. `"{project_repo}"`. |
| `target` | `string` | yes | — | Absolute path inside the container. Must start with `/`. |
| `read_only` | `bool` | no | `false` | Mount read-only. |

### `SecretRef`

| Field | Type | Required | Default | Description |
|-------|------|----------|---------|-------------|
| `name` | `string` | yes | — | Secret identifier in the secret store. |
| `env_var` | `string` | yes | — | Name of the environment variable injected into the container. |
| `required` | `bool` | no | `true` | Whether the tool fails to start if the secret is missing. |

### `HealthCheckConfig`

| Field | Type | Required | Default | Description |
|-------|------|----------|---------|-------------|
| `type` | `"http" \| "tcp" \| "command"` | no | `"http"` | Health check mechanism. |
| `path` | `string \| null` | no | `null` | HTTP path. Required when `type == "http"`. |
| `command` | `string[] \| null` | no | `null` | Command to execute. Required when `type == "command"`. |
| `port` | `int \| null` | no | `null` | Override port; defaults to the primary port if unset. |
| `interval_seconds` | `int` | no | `10` | Check interval. ≥ 1. |
| `timeout_seconds` | `int` | no | `5` | Check timeout. ≥ 1. |
| `retries` | `int` | no | `3` | Retries before marking unhealthy. ≥ 1. |
| `start_period_seconds` | `int` | no | `5` | Grace period before checks count. ≥ 0. |

### `ResourceLimits`

| Field | Type | Required | Default | Description |
|-------|------|----------|---------|-------------|
| `cpus` | `float \| null` | no | `null` | CPU limit. If set, ≥ 0.01. |
| `memory_mb` | `int \| null` | no | `null` | Memory limit in MiB. If set, ≥ 16. |
| `memory_swap_mb` | `int \| null` | no | `null` | Swap limit in MiB. `-1` disables swap limit. |

### `ExecutableConfig`

| Field | Type | Required | Default | Description |
|-------|------|----------|---------|-------------|
| `node_version` | `string \| null` | no | `null` | Expected Node.js version, e.g. `"22"`, `"lts"`. |
| `npm_version` | `string \| null` | no | `null` | Expected npm version. |
| `package_manager` | `"npm" \| "pnpm" \| "yarn" \| "bun"` | no | `"npm"` | Preferred package manager. |
| `bootstrap_commands` | `string[]` | no | `[]` | One-time setup commands run on first start. |
| `install_commands` | `string[]` | no | `[]` | Commands run before the main command. |

### `TraefikConfig`

| Field | Type | Required | Default | Description |
|-------|------|----------|---------|-------------|
| `enabled` | `bool` | no | `true` | Whether Traefik routing is generated for this tool. |
| `subdomain_prefix` | `string \| null` | no | `null` | Subdomain prefix. Defaults to the tool `id`. |
| `port` | `int \| null` | no | `null` | Container port to route traffic to. |
| `middlewares` | `string[]` | no | `[]` | Traefik middleware names to apply. |
| `strip_prefix` | `bool` | no | `false` | Strip path prefix before forwarding. |
| `entrypoint` | `string \| null` | no | `null` | Override the environment default Traefik entrypoint. |
| `cert_resolver` | `string \| null` | no | `null` | Override the environment default cert resolver. |

## Validation Rules

1. `id` must match `^[a-z0-9\-]+$` (lowercase, digits, hyphens only).
2. `MountConfig.target` must be an absolute path (`starts with "/"`).
3. When `health_check.type == "http"`, `path` must be set and non-empty.
4. When `health_check.type == "command"`, `command` must be set and non-empty.
5. `container_port` must be between 1 and 65535.
6. `cpus`, if set, must be ≥ 0.01.
7. `memory_mb`, if set, must be ≥ 16.
8. If `traefik.enabled` is `true`, at least one port must have `primary: true`.

## Example: OpenCode Manifest

```yaml
id: opencode
name: OpenCode
description: AI-powered terminal-based development environment with web interface.
version: "1.0.0"
image: ghcr.io/opencode-ai/opencode:latest
runtime_working_dir: /workspace
ports:
  - container_port: 3000
    protocol: tcp
    name: http
    primary: true
workspace_mounts:
  - type: volume
    source_pattern: "{project_repo}"
    target: /workspace
    read_only: false
config_mounts:
  - type: volume
    source_pattern: "{user_config}/opencode"
    target: /root/.config/opencode
    read_only: false
env:
  TERM: xterm-256color
  FORCE_COLOR: "1"
health_check:
  type: http
  path: /
  port: 3000
  interval_seconds: 10
  timeout_seconds: 5
  retries: 3
  start_period_seconds: 15
resource_limits:
  cpus: 2.0
  memory_mb: 4096
  memory_swap_mb: -1
traefik:
  enabled: true
  subdomain_prefix: opencode
  port: 3000
  middlewares: []
  strip_prefix: false
```

## Extension Guide: Adding a New Tool

To add a new standard container tool:

1. Create a new YAML file in `apps/api/app/tools/manifests/{tool-id}.yml`.
2. Populate all required fields (`id`, `name`, `image`, `ports`).
3. Set `traefik.enabled: true` and mark one port as `primary: true` if the tool needs HTTP routing.
4. Declare `workspace_mounts` and `config_mounts` as needed.
5. Restart the API (or call `registry.load_builtin_manifests()`).

No backend code changes are required for standard containers that expose an HTTP port and need volume mounts.

## Registry API

The in-memory registry exposes FastAPI routes under `/api/v1/tools`:

- `GET /api/v1/tools` — list all registered manifests.
- `GET /api/v1/tools/{id}` — retrieve a single manifest.
- `POST /api/v1/tools` — register a new manifest (returns 409 if `id` already exists).

Built-in manifests are loaded automatically on application startup via the FastAPI lifespan context manager.