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AgentCompany/builtin-skills/software-engineer/clean-code/references/cmt-explain-intent.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

1.6 KiB

title, impact, impactDescription, tags
title impact impactDescription tags
Use Comments to Explain Intent HIGH preserves decision rationale for future readers cmt, intent, why, rationale

Use Comments to Explain Intent

Good comments explain WHY, not WHAT. The code already tells you what it does. Comments should explain the reasoning behind a decision that cannot be expressed in code.

Incorrect (narrating the code):

// Increment counter by 1
counter++;

// Loop through all employees
for (Employee employee : employees) {
    // Check if employee is active
    if (employee.isActive()) {
        // Add employee to list
        activeEmployees.add(employee);
    }
}

// Set the name
this.name = name;

Correct (explaining intent):

// We use insertion sort here because the list is almost always nearly sorted,
// and insertion sort is O(n) for nearly sorted data vs O(n log n) for quicksort
insertionSort(nearlyOrderedList);

// Format matches the external API's expected date format (ISO 8601 without timezone)
// See: https://api.vendor.com/docs/date-format
String formattedDate = date.format(DateTimeFormatter.ISO_LOCAL_DATE);

// Bias toward newer sessions - users expect recent data first
// Business requirement from Product (ticket PROD-1234)
sessions.sort(Comparator.comparing(Session::getCreatedAt).reversed());

Good comment situations:

  • Legal comments (copyright, license)
  • Explanation of intent or rationale
  • Clarification of obscure API behavior
  • Warning of consequences
  • TODO comments (temporary)

Reference: Clean Code, Chapter 4: Comments