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AgentCompany/builtin-skills/software-engineer/clean-architecture/references/dep-stable-abstractions.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

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title, impact, impactDescription, tags
title impact impactDescription tags
Depend on Stable Abstractions Not Volatile Concretions CRITICAL reduces change frequency by 5-10× dep, stability, abstractions, volatility

Depend on Stable Abstractions Not Volatile Concretions

The most flexible systems depend on abstractions, not concretions. Volatile concrete classes are under active development and change frequently; depending on them propagates instability.

Incorrect (depending on volatile concrete class):

// services/notification.go
package services

import (
    "myapp/infrastructure/email/sendgrid"
    "myapp/infrastructure/sms/twilio"
)

type NotificationService struct {
    email  *sendgrid.Client  // Concrete SendGrid client
    sms    *twilio.Client    // Concrete Twilio client
}

func (n *NotificationService) NotifyUser(userID string, message string) {
    // When SendGrid API changes, this service must change
    // When migrating to AWS SES, this service must change
    n.email.SendWithTemplate("notify", message)
}

Correct (depending on stable interface):

// domain/ports/notification.go
package ports

type EmailSender interface {
    Send(to string, subject string, body string) error
}

type SMSSender interface {
    Send(to string, message string) error
}

// services/notification.go
package services

import "myapp/domain/ports"

type NotificationService struct {
    email ports.EmailSender  // Stable abstraction
    sms   ports.SMSSender    // Stable abstraction
}

func (n *NotificationService) NotifyUser(userID string, message string) {
    // Service is immune to email provider changes
    n.email.Send(userID, "Notification", message)
}

// infrastructure/sendgrid/client.go
package sendgrid

type Client struct { /* ... */ }

func (c *Client) Send(to, subject, body string) error {
    // Concrete implementation can change freely
}

Note: Depending on stable concretions (like standard library classes) is acceptable. Focus inversion on volatile, actively-developed modules.

Reference: Clean Architecture - Stable Abstractions Principle