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AgentCompany/builtin-skills/software-engineer/clean-architecture/references/dep-acyclic-dependencies.md
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ZacharyZhang-NY e74dafcd36 Silence render-disposed spam, unbreak bundled skills, drop board wake
Three independently ugly bugs that all fed the same log flood:

* Electron's `WebFrameMain.send` writes every "Render frame was disposed"
  to stderr via `console.error`. When the worker fans a second
  agent-event past a reloading renderer, we produced thousands of
  identical lines and stalled the main loop on stderr I/O. Added a
  `mainFrame.detached` guard so the send is short-circuited before
  Electron's own catch block fires, and installed a targeted filter in
  `suppress-warnings.ts` (now actually imported from the entry point)
  so the specific `console.error("Error sending from webFrameMain:"…)`
  noise never reaches the terminal. Any other payload still surfaces.

* `dispatchAgentMessage` accepted the human-reader sentinel as a wake
  target when an agent replied to `__board__` — `wakeAgentIfPossible`
  then called `db.getAgent("__board__")`, threw, and the dispatcher
  kept repeating on every send. Strip `HUMAN_SENDER_ID` at
  `resolveMessageWakeTargets`, and keep a defense-in-depth guard in the
  heartbeat so a stray caller (future automation fan-out) cannot
  reintroduce the crash.

* Pi's skills loader rejects any SKILL.md whose frontmatter `name`
  diverges from its parent directory. The four bundled `my-writing-style`
  copies declared `name: writing-style-skill`, so every install emitted
  a warning and dropped the skill. They also lived as orphan gitlinks
  (mode 160000 without .gitmodules), and the global `*.md` gitignore
  hid every other SKILL.md from version control. Fixed the frontmatter
  to match the dir, converted the dangling submodules to plain trees,
  and allowlisted `builtin-skills/**/*.md` so a fresh clone carries the
  catalogue instead of silently losing it.
2026-04-20 08:13:48 -04:00

2.3 KiB

title, impact, impactDescription, tags
title impact impactDescription tags
Eliminate Cyclic Dependencies Between Components CRITICAL prevents ripple effects, enables independent deployment dep, cycles, acyclic, components

Eliminate Cyclic Dependencies Between Components

The dependency graph must be a Directed Acyclic Graph (DAG). Cycles create ripple effects where changes propagate unpredictably through the system.

Incorrect (cyclic dependency):

// modules/orders/OrderService.ts
import { CustomerService } from '../customers/CustomerService'

export class OrderService {
  constructor(private customers: CustomerService) {}

  async createOrder(customerId: string) {
    const customer = await this.customers.findById(customerId)
    // ...
  }
}

// modules/customers/CustomerService.ts
import { OrderService } from '../orders/OrderService'  // Cycle!

export class CustomerService {
  constructor(private orders: OrderService) {}

  async getCustomerWithOrders(customerId: string) {
    const orders = await this.orders.findByCustomer(customerId)
    // ...
  }
}
// Neither module can be deployed or tested independently

Correct (break cycle with dependency inversion):

// modules/orders/ports/CustomerProvider.ts
export interface CustomerProvider {
  findById(id: string): Promise<Customer>
}

// modules/orders/OrderService.ts
import { CustomerProvider } from './ports/CustomerProvider'

export class OrderService {
  constructor(private customers: CustomerProvider) {}

  async createOrder(customerId: string) {
    const customer = await this.customers.findById(customerId)
    // ...
  }
}

// modules/customers/CustomerService.ts
// No import from orders module

export class CustomerService implements CustomerProvider {
  // Implements the interface defined in orders module
}

// modules/customers/adapters/OrderAdapter.ts
import { OrderService } from '../../orders/OrderService'

export class CustomerOrderAdapter {
  constructor(private orders: OrderService) {}

  async getOrdersForCustomer(customerId: string) {
    return this.orders.findByCustomer(customerId)
  }
}

Alternative (extract shared abstraction):

Create a new component that both depend on, breaking the cycle into a DAG.

Reference: Clean Architecture - Acyclic Dependencies Principle