afrexai-code-reviewer（afrexai 代码审查员）

Code Review Engine

Enterprise-grade automated code review. Works on GitHub PRs, local diffs, pasted code, or entire files. No dependencies — pure agent intelligence.

Quick Start

Review a GitHub PR

Review PR #42 in owner/repo

Review a local diff

Review the staged changes in this repo

Review a file

Review src/auth/login.ts for security issues

Review pasted code

Just paste code and say "review this"

Review Framework: SPEAR

Every review follows the SPEAR framework — 5 dimensions, each scored 1-10:

🔴 S — Security (Weight: 3x)

🟡 P — Performance (Weight: 2x)

🟠 E — Error Handling (Weight: 2x)

🔵 A — Architecture (Weight: 1.5x)

📊 R — Reliability (Weight: 1.5x)

Scoring System

Per-Finding Severity

CRITICAL  → -3 points from dimension score
HIGH      → -2 points
MEDIUM    → -1 point
LOW       → -0.5 points
INFO      → 0 (suggestion only)

Overall SPEAR Score Calculation

Raw Score = (S×3 + P×2 + E×2 + A×1.5 + R×1.5) / 10
Final Score = Raw Score × 10  (scale 0-100)

Verdict Thresholds

Review Output Template

Use this structure for every review:

# Code Review: [PR title or file name]

## Summary
[1-2 sentence overview of what this code does and overall quality]

## SPEAR Score: [X]/100 — [VERDICT]

| Dimension | Score | Key Finding |
|-----------|-------|-------------|
| 🔴 Security | X/10 | [worst finding or "Clean"] |
| 🟡 Performance | X/10 | [worst finding or "Clean"] |
| 🟠 Error Handling | X/10 | [worst finding or "Clean"] |
| 🔵 Architecture | X/10 | [worst finding or "Clean"] |
| 📊 Reliability | X/10 | [worst finding or "Clean"] |

## Findings

### [CRITICAL/HIGH] 🔴 [Title]
**File:** `path/to/file.ts:42`
**Category:** Security
**Issue:** [What's wrong]
**Impact:** [What could happen]
**Fix:**

// suggested fix

### [MEDIUM] 🟡 [Title]
...

## What's Done Well
- [Genuinely good patterns worth calling out]

## Recommendations
1. [Prioritized action items]

Language-Specific Patterns

TypeScript / JavaScript

• any type usage → Architecture finding
• as type assertions → potential runtime error
• console.log in production code → Style
• == instead of === → Reliability
• Missing async/await error handling
• useEffect missing cleanup return
• Index signatures without validation

Python

• Bare except: or except Exception: → Error Handling
• eval() / exec() → Security CRITICAL
• Mutable default arguments → Reliability
• import * → Architecture
• Missing __init__.py type hints
• f-strings with user input → potential injection

Go

• _ := discarding errors → Error Handling HIGH
• panic() in library code → Reliability HIGH
• Missing defer for resource cleanup
• Exported functions without doc comments
• interface{} / any overuse

Java

• Catching Exception or Throwable → Error Handling
• Missing @Override annotations
• Mutable static fields → thread safety
• System.out.println in production
• Missing null checks (pre-Optional code)

SQL

• String concatenation in queries → Security CRITICAL
• SELECT * → Performance
• Missing WHERE on UPDATE/DELETE → Security CRITICAL
• No LIMIT on user-facing queries → Performance
• Missing indexes for JOIN columns

Advanced Techniques

Reviewing for Business Logic

Beyond code quality, check:

• Does the code match the PR description / ticket requirements?
• Are there edge cases the spec didn't mention?
• Could this break existing functionality?
• Is there a simpler way to achieve the same result?

Reviewing for Operability

• Can this be debugged in production? (logging, error messages)
• Can this be rolled back safely?
• Are feature flags needed?
• What monitoring should accompany this change?

Reviewing Database Changes

• Is the migration reversible?
• Will it lock tables during migration?
• Are there indexes for new query patterns?
• Is there a data backfill needed?

Security Review Depth Levels

Integration Patterns

GitHub PR Review

# Get PR diff
gh pr diff 42 --repo owner/repo

# Get PR details
gh pr view 42 --repo owner/repo --json title,body,files,commits

# Post review comment
gh pr review 42 --repo owner/repo --comment --body "review content"

Local Git Review

# Review staged changes
git diff --cached

# Review branch vs main
git diff main..HEAD

# Review last N commits
git log -5 --oneline && git diff HEAD~5..HEAD

Heartbeat / Cron Integration

Check for open PRs in [repo] that I haven't reviewed yet.
For each, run a SPEAR review and post the results as a PR comment.

Edge Cases & Gotchas

• Large PRs (>500 lines): Break into logical chunks. Review file-by-file. Flag the PR size itself as a finding (Architecture: "PR too large — consider splitting").
• Generated code: Skip generated files (proto, swagger, migrations from ORMs). Note that you skipped them.
• Dependency updates: Focus on breaking changes in changelogs, not the lockfile diff.
• Merge conflicts markers: Flag immediately as CRITICAL — <<<<<<< in code means broken merge.
• Binary files: Note presence, can't review content.
• Config changes: Extra scrutiny — wrong env var = production outage.
• Refactors: Verify behavior preservation. Check if tests still pass conceptually.

Review Checklist (Quick Mode)

For fast reviews when full SPEAR isn't needed:

• [ ] No hardcoded secrets or credentials
• [ ] No SQL injection / XSS / path traversal
• [ ] All errors handled (no empty catch, no discarded errors)
• [ ] No N+1 queries or unbounded operations
• [ ] Tests exist for new/changed logic
• [ ] No console.log / print / fmt.Print left in
• [ ] Functions under 50 lines, files under 300 lines
• [ ] Types are specific (no any / interface{})
• [ ] PR description matches the actual changes
• [ ] No TODOs without linked issues