198 lines
8.2 KiB
Markdown
198 lines
8.2 KiB
Markdown
# AGENTS.md
|
|
|
|
This document defines the laws, principles, and rule sets that govern this codebase. Any agent or developer making changes has to adhere to these rules.
|
|
|
|
**Before starting off** — Read the README.md file to understand the project's goals and objectives.
|
|
|
|
---
|
|
|
|
## Agent Rules (Override Everything)
|
|
|
|
1. **No testing by yourself** — All testing is done by the team.
|
|
2. **No assumptions about code or domain logic** — Always confirm and be sure before making changes.
|
|
3. **No running scripts** — Do not run build, dev, test, or migrate scripts unless explicitly approved.
|
|
|
|
More rules are only to be added by the human, in case such a suggestion becomes viable.
|
|
|
|
---
|
|
|
|
## 1. Project Overview
|
|
|
|
- **Monorepo**: Turbo repo
|
|
- **Package Manager**: pnpm
|
|
- **Language**: TypeScript everywhere
|
|
- **Node**: >= 24
|
|
|
|
### Applications
|
|
|
|
| App | Purpose |
|
|
| ---------------- | ----------------------------------------------------------------------------------------------------------------- |
|
|
| `apps/main` | SvelteKit UI — the primary user-facing application |
|
|
| `apps/processor` | Hono web server — intended for asynchronous processing (jobs, workers). Currently minimal; structure is evolving. |
|
|
|
|
### Packages
|
|
|
|
Packages live under `packages/` and are **standalone, modular** pieces consumed by apps:
|
|
|
|
| Package | Purpose |
|
|
| --------------- | --------------------------------------------- |
|
|
| `@pkg/logic` | Domain logic (DDD, controllers, repositories) |
|
|
| `@pkg/db` | Drizzle schema, database access |
|
|
| `@pkg/logger` | Logging, `getError` for error construction |
|
|
| `@pkg/result` | Result type, `ERROR_CODES`, `tryCatch` |
|
|
| `@pkg/keystore` | Redis instance (sessions, 2FA, etc.) |
|
|
| `@pkg/settings` | App settings / env config |
|
|
|
|
### Data Stores
|
|
|
|
- **PostgreSQL (Drizzle)** — Primary relational data (auth, users, accounts, etc.)
|
|
- **Redis (Valkey)** — Sessions, 2FA verification state (via `@pkg/keystore`)
|
|
|
|
Additional stores (NoSQL DBs, R2, etc.) may be introduced later. Follow existing domain patterns when adding new data access.
|
|
|
|
---
|
|
|
|
## 2. The Logic Package: DDD + Layered Architecture
|
|
|
|
The `@pkg/logic` package contains **all domain logic**. It follows:
|
|
|
|
1. **Domain-Driven Design (DDD)** — Bounded contexts as domains
|
|
2. **Layered architecture** — Clear separation of concerns
|
|
3. **Result-style error handling** — Errors as values; avoid try-catch in domain code
|
|
|
|
### Domain Structure
|
|
|
|
Each domain is a folder under `packages/logic/domains/`:
|
|
|
|
```
|
|
domains/
|
|
<domain-name>/
|
|
data.ts # Types, schemas (Valibot)
|
|
repository.ts # Data access
|
|
controller.ts # Use cases / application logic
|
|
errors.ts # Domain-specific error constructors (using getError)
|
|
```
|
|
|
|
The logic package is **pure domain logic** — no HTTP routes or routers. API exposure is handled by the main app via SvelteKit remote functions. Auth uses `config.base.ts` with better-auth. Add new domains as needed; mirror existing patterns.
|
|
|
|
### Path Aliases (logic package)
|
|
|
|
- `@/*` → `./*`
|
|
- `@domains/*` → `./domains/*`
|
|
- `@core/*` → `./core/*`
|
|
|
|
### Flow Execution Context
|
|
|
|
Domain operations receive a `FlowExecCtx` (`fctx`) for tracing and audit:
|
|
|
|
```ts
|
|
type FlowExecCtx = {
|
|
flowId: string;
|
|
userId?: string;
|
|
sessionId?: string;
|
|
};
|
|
```
|
|
|
|
---
|
|
|
|
## 3. Error Handling: Result Pattern (neverthrow)
|
|
|
|
Errors are **values**, not exceptions. The codebase uses Result-style handling.
|
|
|
|
### Current Conventions
|
|
|
|
1. **Logic package** — Uses `neverthrow` (`ResultAsync`, `okAsync`, `errAsync`) for async operations that may fail.
|
|
2. **`@pkg/result`** — Provides `Result<T, Err>`, `ERROR_CODES`, and `tryCatch()`. The `Result` type is legacy; So don't reach for it primarily.
|
|
3. Use `ERROR_CODES` for consistent error codes.
|
|
4. **`getError()`** — From `@pkg/logger`. Use at boundaries when converting a thrown error to an `Err` object:
|
|
`return getError({ code: ERROR_CODES.XXX, message: "...", description: "...", detail: "..." }, e)`.
|
|
5. **Domain errors** — Each domain has an `errors.ts` that exports error constructors built with `getError`. Use these instead of ad-hoc error objects.
|
|
6. **Check before use** — Always check `result.isOk()` / `result.isErr()` before using `result.value`; never assume success.
|
|
|
|
### Err Shape
|
|
|
|
```ts
|
|
type Err = {
|
|
flowId?: string;
|
|
code: string;
|
|
message: string;
|
|
description: string;
|
|
detail: string;
|
|
actionable?: boolean;
|
|
error?: any;
|
|
// Flexible, but more "defined base fields" in the future
|
|
};
|
|
```
|
|
|
|
---
|
|
|
|
## 4. Frontend (Main App)
|
|
|
|
The main app is a **SvelteKit** application with a domain-driven UI structure.
|
|
|
|
### Structure
|
|
|
|
- **Routes**: File-based routing under `src/routes/`. Layout groups (e.g. `(main)`, `auth`) wrap related pages.
|
|
- **Domain-driven UI**: Feature code lives under `src/lib/domains/<domain>/` — each domain has its own folder with view models, components, and remote functions.
|
|
- **View Model (VM) pattern**: Domain logic and state for a screen live in `*.vm.svelte.ts` classes. VMs hold reactive state (`$state`), orchestrate remote function calls, and expose methods. Pages import and use a VM instance.
|
|
|
|
### SvelteKit Remote Functions
|
|
|
|
The main app uses **SvelteKit remote functions** as the primary API layer — replacing Hono routers in the logic package. Each domain has a `*.remote.ts` file that exposes `query` (reads) and `command` (writes) functions, called directly from VMs. Auth context and `FlowExecCtx` are built inside each remote function from `event.locals` via helpers in `$lib/core/server.utils`.
|
|
|
|
Naming convention: `*SQ` for queries, `*SC` for commands.
|
|
|
|
### Global Stores
|
|
|
|
Shared state (`user`, `session`, `breadcrumbs`) lives in `$lib/global.stores.ts`.
|
|
|
|
### Conventions
|
|
|
|
- Pages are thin: they mount a VM, render components, and wire up lifecycle.
|
|
- VMs own async flows, polling, and error handling for their domain.
|
|
- VMs call remote functions directly; remote functions invoke logic controllers.
|
|
- UI components under `$lib/components/` are shared; domain-specific components live in `$lib/domains/<domain>/`.
|
|
|
|
---
|
|
|
|
## 5. Processor App
|
|
|
|
The processor is a **Hono** server intended for **background work** and async jobs. Its structure is still evolving and it is to be updated soon.
|
|
|
|
When logic is added, processing logic should live under `src/domains/<domain>/` and call into `@pkg/logic` controllers and repositories.
|
|
|
|
---
|
|
|
|
## 6. Observability
|
|
|
|
The stack uses **OpenTelemetry** end-to-end for traces, logs, and metrics, shipped to a **SigNoz** instance (via OTel Collector).
|
|
|
|
### How it fits together
|
|
|
|
- **`apps/main`** bootstraps the OTel SDK in `instrumentation.server.ts` (auto-instrumentation via `@opentelemetry/sdk-node`). SvelteKit's `tracing` and `instrumentation` experimental flags wire this into the request lifecycle.
|
|
- **`@pkg/logger`** ships Winston logs to OTel via `OpenTelemetryTransportV3` — logs are correlated with active traces automatically.
|
|
- **`@pkg/logic/core/observability.ts`** provides two tracing helpers for domain code:
|
|
- `traceResultAsync` — wraps a `ResultAsync` operation in an OTel span. Use this in repositories and controllers.
|
|
- `withFlowSpan` — lower-level span wrapper for non-Result async code.
|
|
- Both helpers accept `fctx` and stamp spans with `flow.id`, `flow.user_id`, and `flow.session_id` for end-to-end trace correlation.
|
|
|
|
### Convention
|
|
|
|
When adding new domain operations in repositories or controllers, wrap them with `traceResultAsync`. Keep span names consistent and descriptive (e.g. `"user.getUserInfo"`). Do not add ad-hoc spans outside these helpers.
|
|
|
|
---
|
|
|
|
## 7. Validation & Schemas
|
|
|
|
- **Valibot** is used for schema validation in the logic package and in remote function input.
|
|
- Domain data types are defined in `data.ts` per domain.
|
|
- Use `v.InferOutput<typeof Schema>` for TypeScript types.
|
|
- Remote functions pass Valibot schemas to `query()` and `command()` for input validation.
|
|
|
|
---
|
|
|
|
## 8. Package Naming
|
|
|
|
- Apps: `@apps/*` (e.g. `@apps/main`, `@apps/processor`)
|
|
- Packages: `@pkg/*` (e.g. `@pkg/logic`, `@pkg/db`, `@pkg/logger`)
|