pr-reviewer

# PR Reviewer

Automated code review for GitHub pull requests. Analyzes diffs for security issues, error handling gaps, style problems, and test coverage.

## Prerequisites

- `gh` CLI installed and authenticated (`gh auth status`)
- Repository access (read at minimum, write for posting comments)
- Optional: `golangci-lint` for Go linting, `ruff` for Python linting

## Quick Start

```bash
# Review all open PRs in current repo
scripts/github/pr-reviewer.sh check

# Review a specific PR
scripts/github/pr-reviewer.sh review 42

# Post review as GitHub comment
scripts/github/pr-reviewer.sh post 42

# Check status of all open PRs
scripts/github/pr-reviewer.sh status

# List unreviewed PRs (useful for heartbeat/cron integration)
scripts/github/pr-reviewer.sh list-unreviewed
```

## Configuration

Set these environment variables or the script auto-detects from the current git repo:

- `PR_REVIEW_REPO` — GitHub repo in `owner/repo` format (default: detected from `gh repo view`)
- `PR_REVIEW_DIR` — Local checkout path for lint (default: git root of cwd)
- `PR_REVIEW_STATE` — State file path (default: `./data/pr-reviews.json`)
- `PR_REVIEW_OUTDIR` — Report output directory (default: `./data/pr-reviews/`)

## Directories Written

- **`PR_REVIEW_STATE`** (default: `./data/pr-reviews.json`) — Tracks reviewed PRs and their HEAD SHAs
- **`PR_REVIEW_OUTDIR`** (default: `./data/pr-reviews/`) — Markdown review reports

## What It Checks

| Category | Icon | Examples |
|----------|------|----------|
| Security | 🔴 | Hardcoded credentials, AWS keys, secrets in code |
| Error Handling | 🟡 | Discarded errors (Go `_ :=`), bare `except:` (Python), unchecked `Close()` |
| Risk | 🟠 | `panic()` calls, `process.exit()` |
| Style | 🔵 | `fmt.Print`/`print()`/`console.log` in prod, very long lines |
| TODOs | 📝 | TODO, FIXME, HACK, XXX markers |
| Test Coverage | 📊 | Source files changed without corresponding test changes |

## Smart Re-Review

Tracks HEAD SHA per PR. Only re-reviews when...