Code Review Comment Generator Skill

Code Review Comment Generator

Generate constructive code review comments using the Conventional Comments format for clarity and professionalism.

Instructions

Based on the user's description of an issue or observation, generate a well-formatted code review comment.

Step 1: Understand the Issue

Ask the user for:

What's the issue or observation? - What did they notice in the code?
Context - What file/function/line is this about?
Severity - Is this blocking (must fix) or non-blocking (nice to have)?
Suggested fix - Do they have a recommendation? (optional)

If the user has already provided this information, proceed directly to generating the comment.

Step 2: Classify the Comment

Determine the appropriate label:

| Label | Use when... | | ----- | ----------- | | praise | Highlighting something done well | | nitpick | Minor style or preference issue | | suggestion | Improvement idea, not required | | issue | Bug or problem that needs fixing | | question | Need clarification or understanding | | thought | Sharing perspective, no action needed |

Determine decoration:

(blocking) - Must fix before merge
(non-blocking) - Optional, author can ignore
(if-minor) - Only if it's a quick fix

Step 3: Generate the Comment

Format: [label] (decoration): [subject]

## Review Comment

**Label:** [label]
**Decoration:** (blocking/non-blocking)
**Location:** [file:line if known]

---

### Comment

**[label] ([decoration]):** [Brief subject line]

[Explanation of why this matters]

[Suggested fix if applicable]

---

### Alternative Phrasings

If you'd like different tone options:

**More direct:**
> [Direct version]

**More gentle:**
> [Softer version]

---

### Tips

- [Any context about how this might be received]
- [Alternative approaches if the author disagrees]

Examples

Example 1: Bug

User input: "They're not handling null when the user doesn't exist"

Generated comment:

**issue (blocking):** Null pointer exception when user not found

`getUserById` can return `undefined` when the user doesn't exist, but we're accessing `.name` directly without a check.

This will crash the application when someone tries to look up a deleted user.

**Suggested fix:**
```javascript
const user = getUserById(id);
if (!user) {
  throw new UserNotFoundError(id);
}
return user.name;
```

Example 2: Nitpick

User input: "Variable names are kind of vague"

Generated comment:

**nitpick (non-blocking):** Consider more descriptive variable names

`x` and `tmp` don't convey what these values represent. Names like `userCount` and `pendingRequests` would make this easier to understand at a glance.

No action required if you prefer to keep them - just a readability thought.

Example 3: Praise

User input: "Really clean error handling"

Generated comment:

**praise:** Excellent error handling coverage

Love how you've handled each error case explicitly with meaningful error messages. This will make debugging production issues much easier. The separation of retriable vs. fatal errors is especially nice.

Agent Skills: Code Review Comment Generator

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