github-code-review

Files (2)

• SKILL.md
• review-output-template.md · references/

SKILL.md (first lines)

# GitHub Code Review

Perform code reviews on local changes before pushing, or review open PRs on GitHub. Most of this skill uses plain `git` — the `gh`/`curl` split only matters for PR-level interactions.

## Prerequisites

- Authenticated with GitHub (see `github-auth` skill)
- Inside a git repository

### Setup (for PR interactions)

```bash
if command -v gh &>/dev/null && gh auth status &>/dev/null; then
  AUTH="gh"
else
  AUTH="git"
  if [ -z "$GITHUB_TOKEN" ]; then
    GITHUB_TOKEN=$(grep "github.com" ~/.git-credentials 2>/dev/null | head -1 | sed 's|https://[^:]*:\([^@]*\)@.*|\1|')
  fi
fi

REMOTE_URL=$(git remote get-url origin)
OWNER_REPO=$(echo "$REMOTE_URL" | sed -E 's|.*github\.com[:/]||; s|\.git$||')
OWNER=$(echo "$OWNER_REPO" | cut -d/ -f1)
REPO=$(echo "$OWNER_REPO" | cut -d/ -f2)
```

---

## 1. Reviewing Local Changes (Pre-Push)

This is pure `git` — works everywhere, no API needed.

### Get the Diff

```bash
# Staged changes (what would be committed)
git diff --staged

# All changes vs main (what a PR would contain)
git diff main...HEAD

# File names only
git diff main...HEAD --name-only

# Stat summary (insertions/deletions per file)
git diff main...HEAD --stat
```

### Review Strategy

1. **Get the big picture first:**

```bash
git diff main...HEAD --stat
git log main..HEAD --oneline
```

2. **Review file by file** — use `read_file` on changed files for full context, and the diff to see what changed:

```bash
git diff main...HEAD -- src/auth/login.py
```

3. **Check for common issues:**

```bash
# Debug statements, TODOs, console.logs left behind
git diff main...HEAD | grep -n "print(\|console\.log\|TODO\|FIXME\|HACK\|XXX\|debugger"

# Large files accidentally staged
git diff main...HEAD --stat | sort -t'|' -k2 -rn | head -10

# Secrets or credential patterns
git diff main...HEAD | grep -in "password\|secret\|api_key\|token.*=\|private_key"

# Merge conflict markers
git diff main...HEAD | grep -n "<<<<<<\|>>>>>>\|======="
```

4. **Present structured feedback** to the user.

### Review Output Format

When reviewing local changes, present findings in this structure:

```
## Code Review Summary

### Critical
- **src/auth.py:45** — SQL injection: user input passed directly to query.
  Suggestion: Use parameterized queries.

### Warnings
- **src/models/user.py:23** — Password stored in plaintext. Use bcrypt or argon2.
- **src/api/routes.py:112** — No rate limiting on login endpoint.

### Suggestions
- **src/utils/helpers.py:8** — Duplicates logic in `src/core/utils.py:34`. Consolidate.
- **tests/test_auth.py** — Missing edge case: expired token test.

### Looks Good
- Clean separation of concerns in the middleware layer
- Good test coverage for the happy path
```

---

## 2. Reviewing a Pull Request on GitHub

### View PR Details

**With gh:**

```bash
gh pr view 123
gh pr diff 123
gh pr diff 123 --name-only
```

From helix4u/hermes-agent-private, MIT.

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