# 02. Component Breakdown And API Contracts

## 1. Component Breakdown

## 1.1 Control Plane Components

| Component | Runtime | Responsibility | Notes |
|---|---|---|---|
| Hub Web/API | Next.js 16 + Node | Admin UI, customer portal, public APIs, tenant APIs | Keep existing app, add route groups and API contracts below. |
| Billing Engine | Node worker + Prisma | Usage aggregation, pool accounting, overage invoicing | Hourly usage compaction + end-of-period invoice sync. |
| Provisioning Orchestrator | Existing automation worker | Order state machine and provisioning job dispatch | Keep and harden existing job pipeline. |
| Notification Gateway | Node service | Push notifications, email alerts, approval prompts | Expo push + email provider adapters. |
| Onboarding Classifier | Lightweight service | Business-type classification + starter bundle recommendation | Cheap fast model profile; capped context. |

## 1.2 Tenant Components (Per VPS)

| Component | Runtime | Responsibility | State Store |
|---|---|---|---|
| OpenClaw Gateway | Node 22+ upstream | Agent runtime, sessions, tool orchestration | OpenClaw JSON/JSONL storage |
| Safety Wrapper Plugin | TypeScript package | Classification, gating, hooks, metering, Hub sync | SQLite (`safety.db`) |
| Egress Proxy | Node/Rust sidecar | Outbound redaction + transport enforcement | In-memory + policy cache |
| Execution Adapters | Local modules | Shell/Docker/file/env and tool REST adapters | Audit log in SQLite |
| Secrets Vault | SQLite + encryption | Secret values, rotation history, fingerprints | `vault.db` |

## 1.3 Deprecated Components (Explicitly Out)

- `letsbe-orchestrator`: behavior studied for migration inputs only.
- `letsbe-sysadmin-agent`: executor patterns ported, service itself not retained.
- `letsbe-mcp-browser`: replaced by OpenClaw native browser tooling.

## 2. API Design Rules (Applies To All Contracts)

- Base path versioning: `/api/v1/...`
- JSON request/response with strict schema validation.
- Idempotency required on mutating tenant commands (`Idempotency-Key` header).
- Authn/authz split by channel:
  - Tenant channel: `Bearer <tenant_api_key>` (hash stored server-side)
  - Mobile/customer channel: session JWT + RBAC
  - Public website onboarding: scoped API key + anti-abuse limits
- All mutating endpoints emit audit event rows.
- All time fields are ISO 8601 UTC.

## 3. Hub ↔ Tenant API Contracts

## 3.1 Register Tenant Node

`POST /api/v1/tenant/register`

Purpose: first boot registration from Safety Wrapper.

Request:

```json
{
  "registrationToken": "rt_...",
  "orderId": "ord_...",
  "agentVersion": "safety-wrapper@0.1.0",
  "openclawVersion": "2026.2.26",
  "hostname": "cust-vps-001",
  "capabilities": ["browser", "exec", "docker", "approval_queue"]
}
```

Response `201`:

```json
{
  "tenantApiKey": "tk_live_...",
  "tenantId": "ten_...",
  "heartbeatIntervalSec": 30,
  "configEtag": "cfg_9f1a...",
  "time": "2026-02-26T20:15:00Z"
}
```

## 3.2 Heartbeat + Pull Deltas

`POST /api/v1/tenant/heartbeat`

Purpose: status signal plus lightweight config/update pull.

Request:

```json
{
  "tenantId": "ten_...",
  "server": {
    "uptimeSec": 86400,
    "diskPct": 61.2,
    "memPct": 57.8,
    "openclawHealthy": true
  },
  "agents": [
    {"agentId": "marketing", "status": "online", "autonomyLevel": 2}
  ],
  "pendingApprovals": 1,
  "lastAppliedConfigEtag": "cfg_9f1a..."
}
```

Response `200`:

```json
{
  "configChanged": true,
  "nextConfigEtag": "cfg_9f1b...",
  "commands": [],
  "clock": "2026-02-26T20:15:30Z"
}
```

## 3.3 Pull Full Tenant Config

`GET /api/v1/tenant/config?etag=cfg_9f1a...`

Response `200` includes:

- agent definitions (SOUL/TOOLS refs, model profile)
- autonomy policy
- external comms gate unlock map
- command classification ruleset checksum
- tool registry template version

## 3.4 Approval Request / Resolve

`POST /api/v1/tenant/approval-requests`

```json
{
  "tenantId": "ten_...",
  "requestId": "apr_...",
  "agentId": "marketing",
  "class": "yellow_external",
  "tool": "listmonk.send_campaign",
  "humanSummary": "Send campaign 'March Offer' to 1,204 recipients",
  "expiresAt": "2026-02-27T20:15:30Z",
  "context": {"recipientCount": 1204}
}
```

`GET /api/v1/tenant/approval-requests/{requestId}` returns `PENDING|APPROVED|DENIED|EXPIRED`.

## 3.5 Usage Ingestion

`POST /api/v1/tenant/usage-buckets`

```json
{
  "tenantId": "ten_...",
  "buckets": [
    {
      "hour": "2026-02-26T20:00:00Z",
      "agentId": "marketing",
      "model": "openrouter/deepseek-v3.2",
      "inputTokens": 12000,
      "outputTokens": 3800,
      "cacheReadTokens": 6400,
      "cacheWriteTokens": 0,
      "webSearchCalls": 3,
      "webFetchCalls": 1
    }
  ]
}
```

## 3.6 Backup Status

`POST /api/v1/tenant/backup-status`

Tracks last run, duration, snapshot ID, integrity verification state.

## 4. Customer/Mobile API Contracts

## 4.1 Agent And Autonomy Management

- `GET /api/v1/customer/agents`
- `PATCH /api/v1/customer/agents/{agentId}`
- `PATCH /api/v1/customer/agents/{agentId}/autonomy`
- `PATCH /api/v1/customer/agents/{agentId}/external-comms-gate`

Autonomy update request:

```json
{
  "autonomyLevel": 2,
  "externalComms": {
    "defaultLocked": true,
    "toolUnlocks": [
      {"tool": "chatwoot.reply_external", "enabled": true, "expiresAt": null}
    ]
  }
}
```

## 4.2 Approval Queue

- `GET /api/v1/customer/approvals?status=pending`
- `POST /api/v1/customer/approvals/{id}` with `{ "decision": "approve" | "deny" }`

## 4.3 Usage And Billing

- `GET /api/v1/customer/usage/summary`
- `GET /api/v1/customer/usage/by-agent`
- `GET /api/v1/customer/billing/current-period`
- `POST /api/v1/customer/billing/payment-method`

## 4.4 Realtime Channels

- `GET /api/v1/customer/events/stream` (SSE fallback)
- `WS /api/v1/customer/ws` (chat updates, approvals, status)

## 5. Public Website/Onboarding API Contracts

## 5.1 Business Classification

`POST /api/v1/public/onboarding/classify`

```json
{
  "sessionId": "onb_...",
  "messages": [
    {"role": "user", "content": "I run a 5-person digital agency"}
  ]
}
```

Response:

```json
{
  "businessType": "agency",
  "confidence": 0.91,
  "recommendedBundle": "agency_core_v1",
  "followUpQuestion": "Do you need ticketing or only chat?"
}
```

## 5.2 Bundle Quote

`POST /api/v1/public/onboarding/quote`

Returns min tier, projected token pool, monthly estimate, and Stripe checkout seed payload.

## 5.3 Order Creation

`POST /api/v1/public/orders` with strict schema + anti-fraud controls.

## 6. Safety Wrapper Internal Contract (Local Only)

Local Unix socket JSON-RPC interface between plugin orchestration and execution layer.

Method examples:

- `exec.run`
- `docker.compose`
- `file.read`
- `file.write`
- `env.update`
- `tool.http.call`

Example request:

```json
{
  "id": "rpc_1",
  "method": "tool.http.call",
  "params": {
    "tool": "ghost",
    "operation": "posts.create",
    "secretRefs": ["ghost_admin_key"],
    "payload": {"title": "..."}
  }
}
```

Guarantees:

- Secrets passed only as references, never raw values in request logs.
- Execution engine resolves references inside isolated process boundary.
- Full request/result hashes persisted for audit traceability.

## 7. Tool Registry Contract

`tool-registry.json` shape (tenant-local):

```json
{
  "version": "2026-02-26",
  "tools": [
    {
      "id": "chatwoot",
      "baseUrl": "https://chat.customer-domain.tld",
      "auth": {"type": "bearer_secret_ref", "ref": "chatwoot_api_token"},
      "adapters": ["contacts.list", "conversation.reply"],
      "externalCommsOperations": ["conversation.reply_external"],
      "cheatsheet": "/opt/letsbe/cheatsheets/chatwoot.md"
    }
  ]
}
```

## 8. Error Contract And Retries

Standard error envelope:

```json
{
  "error": {
    "code": "APPROVAL_REQUIRED",
    "message": "Operation requires approval",
    "requestId": "req_...",
    "retryable": true,
    "details": {"approvalRequestId": "apr_..."}
  }
}
```

Common error codes:

- `AUTH_INVALID`
- `TENANT_UNKNOWN`
- `APPROVAL_REQUIRED`
- `APPROVAL_EXPIRED`
- `CLASSIFICATION_BLOCKED`
- `SECRET_REF_UNRESOLVED`
- `POLICY_VERSION_MISMATCH`
- `RATE_LIMITED`

## 9. API Compatibility And Change Policy

- Backward-compatible additions: allowed in-place.
- Breaking changes: new version path (`/api/v2`).
- Deprecation window: minimum 60 days for tenant APIs.
- Contract tests run in CI for Hub, Safety Wrapper, Mobile, and Website clients.